com.fasterxml.jackson.core.util

## Class JsonParserDelegate

- java.lang.Object
- - com.fasterxml.jackson.core.JsonParser
  - - com.fasterxml.jackson.core.util.JsonParserDelegate

- All Implemented Interfaces:
    Versioned, Closeable, AutoCloseable
  Direct Known Subclasses:
    FilteringParserDelegate, JsonParserSequence

      public class JsonParserDelegate
      extends JsonParser

  Helper class that implements delegation pattern for `JsonParser`, to allow for simple overridability of basic parsing functionality. The idea is that any functionality to be modified can be simply overridden; and anything else will be delegated by default.

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from class com.fasterxml.jackson.core.JsonParser

      `JsonParser.Feature, JsonParser.NumberType`

  - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected JsonParser` | `delegate` Delegate object that method calls are delegated to.

    - ### Fields inherited from class com.fasterxml.jackson.core.JsonParser

      `_features, _requestPayload`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `JsonParserDelegate(JsonParser d)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods Deprecated Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `canReadObjectId()` Introspection method that may be called to see if the underlying data format supports some kind of Object Ids natively (many do not; for example, JSON doesn't).
    `boolean` | `canReadTypeId()` Introspection method that may be called to see if the underlying data format supports some kind of Type Ids natively (many do not; for example, JSON doesn't).
    `boolean` | `canUseSchema(FormatSchema schema)` Method that can be used to verify that given schema can be used with this parser (using `JsonParser.setSchema(com.fasterxml.jackson.core.FormatSchema)`).
    `void` | `clearCurrentToken()` Method called to "consume" the current token by effectively removing it so that `JsonParser.hasCurrentToken()` returns false, and `JsonParser.getCurrentToken()` null).
    `void` | `close()` Closes the parser so that no further iteration or data access can be made; will also close the underlying input source if parser either owns the input source, or feature `JsonParser.Feature.AUTO_CLOSE_SOURCE` is enabled.
    `JsonToken` | `currentToken()` Accessor to find which token parser currently points to, if any; null will be returned if none.
    `int` | `currentTokenId()` Method similar to `JsonParser.getCurrentToken()` but that returns an `int` instead of `JsonToken` (enum value).
    `JsonParser` | `delegate()` Accessor for getting the immediate `JsonParser` this parser delegates calls to.
    `JsonParser` | `disable(JsonParser.Feature f)` Method for disabling specified feature (check `JsonParser.Feature` for list of features)
    `JsonParser` | `enable(JsonParser.Feature f)` Method for enabling specified parser feature (check `JsonParser.Feature` for list of features)
    `void` | `finishToken()` Method that may be used to force full handling of the current token so that even if lazy processing is enabled, the whole contents are read for possible retrieval.
    `BigInteger` | `getBigIntegerValue()` Numeric accessor that can be called when the current token is of type `JsonToken.VALUE_NUMBER_INT` and it can not be used as a Java long primitive type due to its magnitude.
    `byte[]` | `getBinaryValue(Base64Variant b64variant)` Method that can be used to read (and consume -- results may not be accessible using other methods after the call) base64-encoded binary data included in the current textual JSON value.
    `boolean` | `getBooleanValue()` Convenience accessor that can be called when the current token is `JsonToken.VALUE_TRUE` or `JsonToken.VALUE_FALSE`.
    `byte` | `getByteValue()` Numeric accessor that can be called when the current token is of type `JsonToken.VALUE_NUMBER_INT` and it can be expressed as a value of Java byte primitive type.
    `ObjectCodec` | `getCodec()` Accessor for `ObjectCodec` associated with this parser, if any.
    `JsonLocation` | `getCurrentLocation()` Method that returns location of the last processed character; usually for error reporting purposes.
    `String` | `getCurrentName()` Method that can be called to get the name associated with the current token: for `JsonToken.FIELD_NAME`s it will be the same as what `JsonParser.getText()` returns; for field values it will be preceding field name; and for others (array values, root-level values) null.
    `JsonToken` | `getCurrentToken()` Alias for `JsonParser.currentToken()`, will be deprecated in Jackson 2.9
    `int` | `getCurrentTokenId()` Alias for `JsonParser.currentTokenId()`, will be deprecated in Jackson 2.9
    `Object` | `getCurrentValue()` Helper method, usually equivalent to: `getParsingContext().getCurrentValue();`
    `BigDecimal` | `getDecimalValue()` Numeric accessor that can be called when the current token is of type `JsonToken.VALUE_NUMBER_FLOAT` or `JsonToken.VALUE_NUMBER_INT`.
    `double` | `getDoubleValue()` Numeric accessor that can be called when the current token is of type `JsonToken.VALUE_NUMBER_FLOAT` and it can be expressed as a Java double primitive type.
    `Object` | `getEmbeddedObject()` Accessor that can be called if (and only if) the current token is `JsonToken.VALUE_EMBEDDED_OBJECT`.
    `int` | `getFeatureMask()` Bulk access method for getting state of all standard `JsonParser.Feature`s.
    `float` | `getFloatValue()` Numeric accessor that can be called when the current token is of type `JsonToken.VALUE_NUMBER_FLOAT` and it can be expressed as a Java float primitive type.
    `Object` | `getInputSource()` Method that can be used to get access to object that is used to access input being parsed; this is usually either `InputStream` or `Reader`, depending on what parser was constructed with.
    `int` | `getIntValue()` Numeric accessor that can be called when the current token is of type `JsonToken.VALUE_NUMBER_INT` and it can be expressed as a value of Java int primitive type.
    `JsonToken` | `getLastClearedToken()` Method that can be called to get the last token that was cleared using `JsonParser.clearCurrentToken()`.
    `long` | `getLongValue()` Numeric accessor that can be called when the current token is of type `JsonToken.VALUE_NUMBER_INT` and it can be expressed as a Java long primitive type.
    `JsonParser.NumberType` | `getNumberType()` If current token is of type `JsonToken.VALUE_NUMBER_INT` or `JsonToken.VALUE_NUMBER_FLOAT`, returns one of `JsonParser.NumberType` constants; otherwise returns null.
    `Number` | `getNumberValue()` Generic number value accessor method that will work for all kinds of numeric values.
    `Object` | `getObjectId()` Method that can be called to check whether current token (one that was just read) has an associated Object id, and if so, return it.
    `JsonStreamContext` | `getParsingContext()` Method that can be used to access current parsing context reader is in.
    `FormatSchema` | `getSchema()` Method for accessing Schema that this parser uses, if any.
    `short` | `getShortValue()` Numeric accessor that can be called when the current token is of type `JsonToken.VALUE_NUMBER_INT` and it can be expressed as a value of Java short primitive type.
    `String` | `getText()` Method for accessing textual representation of the current token; if no current token (before first call to `JsonParser.nextToken()`, or after encountering end-of-input), returns null.
    `int` | `getText(Writer writer)` Method to read the textual representation of the current token in chunks and pass it to the given Writer.
    `char[]` | `getTextCharacters()` Method similar to `JsonParser.getText()`, but that will return underlying (unmodifiable) character array that contains textual value, instead of constructing a String object to contain this information.
    `int` | `getTextLength()` Accessor used with `JsonParser.getTextCharacters()`, to know length of String stored in returned buffer.
    `int` | `getTextOffset()` Accessor used with `JsonParser.getTextCharacters()`, to know offset of the first text content character within buffer.
    `JsonLocation` | `getTokenLocation()` Method that return the starting location of the current token; that is, position of the first character from input that starts the current token.
    `Object` | `getTypeId()` Method that can be called to check whether current token (one that was just read) has an associated type id, and if so, return it.
    `boolean` | `getValueAsBoolean()` Method that will try to convert value of current token to a boolean.
    `boolean` | `getValueAsBoolean(boolean defaultValue)` Method that will try to convert value of current token to a boolean.
    `double` | `getValueAsDouble()` Method that will try to convert value of current token to a Java double.
    `double` | `getValueAsDouble(double defaultValue)` Method that will try to convert value of current token to a Java double.
    `int` | `getValueAsInt()` Method that will try to convert value of current token to a int.
    `int` | `getValueAsInt(int defaultValue)` Method that will try to convert value of current token to a int.
    `long` | `getValueAsLong()` Method that will try to convert value of current token to a long.
    `long` | `getValueAsLong(long defaultValue)` Method that will try to convert value of current token to a long.
    `String` | `getValueAsString()` Method that will try to convert value of current token to a `String`.
    `String` | `getValueAsString(String defaultValue)` Method that will try to convert value of current token to a `String`.
    `boolean` | `hasCurrentToken()` Method for checking whether parser currently points to a token (and data for that token is available).
    `boolean` | `hasTextCharacters()` Method that can be used to determine whether calling of `JsonParser.getTextCharacters()` would be the most efficient way to access textual content for the event parser currently points to.
    `boolean` | `hasToken(JsonToken t)` Method that is functionally equivalent to: `return currentToken() == t` but may be more efficiently implemented.
    `boolean` | `hasTokenId(int id)` Method that is functionally equivalent to: `return currentTokenId() == id` but may be more efficiently implemented.
    `boolean` | `isClosed()` Method that can be called to determine whether this parser is closed or not.
    `boolean` | `isEnabled(JsonParser.Feature f)` Method for checking whether specified `JsonParser.Feature` is enabled.
    `boolean` | `isExpectedStartArrayToken()` Specialized accessor that can be used to verify that the current token indicates start array (usually meaning that current token is `JsonToken.START_ARRAY`) when start array is expected.
    `boolean` | `isExpectedStartObjectToken()` Similar to `JsonParser.isExpectedStartArrayToken()`, but checks whether stream currently points to `JsonToken.START_OBJECT`.
    `boolean` | `isNaN()` Access for checking whether current token is a numeric value token, but one that is of "not-a-number" (NaN) variety (including both "NaN" AND positive/negative infinity!): not supported by all formats, but often supported for `JsonToken.VALUE_NUMBER_FLOAT`.
    `JsonToken` | `nextToken()` Main iteration method, which will advance stream enough to determine type of the next token, if any.
    `JsonToken` | `nextValue()` Iteration method that will advance stream enough to determine type of the next token that is a value type (including JSON Array and Object start/end markers).
    `void` | `overrideCurrentName(String name)` Method that can be used to change what is considered to be the current (field) name.
    `JsonParser` | `overrideFormatFeatures(int values, int mask)` Bulk set method for (re)setting states of `FormatFeature`s, by specifying values (set / clear) along with a mask, to determine which features to change, if any.
    `JsonParser` | `overrideStdFeatures(int values, int mask)` Bulk set method for (re)setting states of features specified by `mask`.
    `int` | `readBinaryValue(Base64Variant b64variant, OutputStream out)` Similar to `JsonParser.readBinaryValue(OutputStream)` but allows explicitly specifying base64 variant to use.
    `boolean` | `requiresCustomCodec()` Method that can be called to determine if a custom `ObjectCodec` is needed for binding data parsed using `JsonParser` constructed by this factory (which typically also implies the same for serialization with `JsonGenerator`).
    `void` | `setCodec(ObjectCodec c)` Setter that allows defining `ObjectCodec` associated with this parser, if any.
    `void` | `setCurrentValue(Object v)` Helper method, usually equivalent to: `getParsingContext().setCurrentValue(v);`
    `JsonParser` | `setFeatureMask(int mask)` Deprecated.
    `void` | `setSchema(FormatSchema schema)` Method to call to make this parser use specified schema.
    `JsonParser` | `skipChildren()` Method that will skip all child tokens of an array or object token that the parser currently points to, iff stream points to `JsonToken.START_OBJECT` or `JsonToken.START_ARRAY`.
    `Version` | `version()` Accessor for getting version of the core package, given a parser instance.

    - ### Methods inherited from class com.fasterxml.jackson.core.JsonParser

      `_codec, _constructError, _reportUnsupportedOperation, canParseAsync, configure, currentName, getBinaryValue, getFormatFeatures, getNonBlockingInputFeeder, isEnabled, nextBooleanValue, nextFieldName, nextFieldName, nextIntValue, nextLongValue, nextTextValue, readBinaryValue, readValueAs, readValueAs, readValueAsTree, readValuesAs, readValuesAs, releaseBuffered, releaseBuffered, setRequestPayloadOnError, setRequestPayloadOnError, setRequestPayloadOnError`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Field Detail

    - #### delegate

          protected JsonParser delegate

      Delegate object that method calls are delegated to.

  - ### Constructor Detail

    - #### JsonParserDelegate

          public JsonParserDelegate(JsonParser d)

  - ### Method Detail

    - #### getCurrentValue

          public Object getCurrentValue()

      Description copied from class: `JsonParser`
      Helper method, usually equivalent to: `getParsingContext().getCurrentValue();`

      Note that "current value" is NOT populated (or used) by Streaming parser; it is only used by higher-level data-binding functionality. The reason it is included here is that it can be stored and accessed hierarchically, and gets passed through data-binding.

      Overrides:
        `getCurrentValue` in class `JsonParser`

    - #### setCurrentValue

          public void setCurrentValue(Object v)

      Description copied from class: `JsonParser`
      Helper method, usually equivalent to: `getParsingContext().setCurrentValue(v);`
      Overrides:
        `setCurrentValue` in class `JsonParser`

    - #### setCodec

          public void setCodec(ObjectCodec c)

      Description copied from class: `JsonParser`
      Setter that allows defining `ObjectCodec` associated with this parser, if any. Codec is used by `JsonParser.readValueAs(Class)` method (and its variants).
      Specified by:
        `setCodec` in class `JsonParser`

    - #### getCodec

          public ObjectCodec getCodec()

      Description copied from class: `JsonParser`
      Accessor for `ObjectCodec` associated with this parser, if any. Codec is used by `JsonParser.readValueAs(Class)` method (and its variants).
      Specified by:
        `getCodec` in class `JsonParser`

    - #### enable

          public JsonParser enable(JsonParser.Feature f)

      Description copied from class: `JsonParser`
      Method for enabling specified parser feature (check `JsonParser.Feature` for list of features)
      Overrides:
        `enable` in class `JsonParser`

    - #### disable

          public JsonParser disable(JsonParser.Feature f)

      Description copied from class: `JsonParser`
      Method for disabling specified feature (check `JsonParser.Feature` for list of features)
      Overrides:
        `disable` in class `JsonParser`

    - #### isEnabled

          public boolean isEnabled(JsonParser.Feature f)

      Description copied from class: `JsonParser`
      Method for checking whether specified `JsonParser.Feature` is enabled.
      Overrides:
        `isEnabled` in class `JsonParser`

    - #### getFeatureMask

          public int getFeatureMask()

      Description copied from class: `JsonParser`
      Bulk access method for getting state of all standard `JsonParser.Feature`s.
      Overrides:
        `getFeatureMask` in class `JsonParser`
      Returns:
        Bit mask that defines current states of all standard `JsonParser.Feature`s.

    - #### setFeatureMask

          @Deprecated
          public JsonParser setFeatureMask(int mask)

      Deprecated.
      Description copied from class: `JsonParser`
      Bulk set method for (re)setting states of all standard `JsonParser.Feature`s
      Overrides:
        `setFeatureMask` in class `JsonParser`
      Returns:
        This parser object, to allow chaining of calls

    - #### overrideStdFeatures

          public JsonParser overrideStdFeatures(int values,
                                                int mask)

      Description copied from class: `JsonParser`
      Bulk set method for (re)setting states of features specified by `mask`. Functionally equivalent to `int oldState = getFeatureMask(); int newState = (oldState & ~mask) | (values & mask); setFeatureMask(newState);` but preferred as this lets caller more efficiently specify actual changes made.
      Overrides:
        `overrideStdFeatures` in class `JsonParser`
      Parameters:
        `values` - Bit mask of set/clear state for features to change
        `mask` - Bit mask of features to change

    - #### overrideFormatFeatures

          public JsonParser overrideFormatFeatures(int values,
                                                   int mask)

      Description copied from class: `JsonParser`
      Bulk set method for (re)setting states of `FormatFeature`s, by specifying values (set / clear) along with a mask, to determine which features to change, if any.

      Default implementation will simply throw an exception to indicate that the generator implementation does not support any `FormatFeature`s.

      Overrides:
        `overrideFormatFeatures` in class `JsonParser`
      Parameters:
        `values` - Bit mask of set/clear state for features to change
        `mask` - Bit mask of features to change

    - #### getSchema

          public FormatSchema getSchema()

      Description copied from class: `JsonParser`
      Method for accessing Schema that this parser uses, if any. Default implementation returns null.
      Overrides:
        `getSchema` in class `JsonParser`

    - #### setSchema

          public void setSchema(FormatSchema schema)

      Description copied from class: `JsonParser`
      Method to call to make this parser use specified schema. Method must be called before trying to parse any content, right after parser instance has been created. Note that not all parsers support schemas; and those that do usually only accept specific types of schemas: ones defined for data format parser can read.

      If parser does not support specified schema, `UnsupportedOperationException` is thrown.

      Overrides:
        `setSchema` in class `JsonParser`
      Parameters:
        `schema` - Schema to use

    - #### canUseSchema

          public boolean canUseSchema(FormatSchema schema)

      Description copied from class: `JsonParser`
      Method that can be used to verify that given schema can be used with this parser (using `JsonParser.setSchema(com.fasterxml.jackson.core.FormatSchema)`).
      Overrides:
        `canUseSchema` in class `JsonParser`
      Parameters:
        `schema` - Schema to check
      Returns:
        True if this parser can use given schema; false if not

    - #### version

          public Version version()

      Description copied from class: `JsonParser`
      Accessor for getting version of the core package, given a parser instance. Left for sub-classes to implement.
      Specified by:
        `version` in interface `Versioned`
      Specified by:
        `version` in class `JsonParser`

    - #### getInputSource

          public Object getInputSource()

      Description copied from class: `JsonParser`
      Method that can be used to get access to object that is used to access input being parsed; this is usually either `InputStream` or `Reader`, depending on what parser was constructed with. Note that returned value may be null in some cases; including case where parser implementation does not want to exposed raw source to caller. In cases where input has been decorated, object returned here is the decorated version; this allows some level of interaction between users of parser and decorator object.

      In general use of this accessor should be considered as "last effort", i.e. only used if no other mechanism is applicable.

      Overrides:
        `getInputSource` in class `JsonParser`

    - #### requiresCustomCodec

          public boolean requiresCustomCodec()

      Description copied from class: `JsonParser`
      Method that can be called to determine if a custom `ObjectCodec` is needed for binding data parsed using `JsonParser` constructed by this factory (which typically also implies the same for serialization with `JsonGenerator`).
      Overrides:
        `requiresCustomCodec` in class `JsonParser`
      Returns:
        True if custom codec is needed with parsers and generators created by this factory; false if a general `ObjectCodec` is enough

    - #### close

          public void close()
                     throws IOException

      Description copied from class: `JsonParser`
      Closes the parser so that no further iteration or data access can be made; will also close the underlying input source if parser either owns the input source, or feature `JsonParser.Feature.AUTO_CLOSE_SOURCE` is enabled. Whether parser owns the input source depends on factory method that was used to construct instance (so check `JsonFactory` for details, but the general idea is that if caller passes in closable resource (such as `InputStream` or `Reader`) parser does NOT own the source; but if it passes a reference (such as `File` or `URL` and creates stream or reader it does own them.
      Specified by:
        `close` in interface `Closeable`
      Specified by:
        `close` in interface `AutoCloseable`
      Specified by:
        `close` in class `JsonParser`
      Throws:
        `IOException`

    - #### isClosed

          public boolean isClosed()

      Description copied from class: `JsonParser`
      Method that can be called to determine whether this parser is closed or not. If it is closed, no new tokens can be retrieved by calling `JsonParser.nextToken()` (and the underlying stream may be closed). Closing may be due to an explicit call to `JsonParser.close()` or because parser has encountered end of input.
      Specified by:
        `isClosed` in class `JsonParser`

    - #### currentToken

          public JsonToken currentToken()

      Description copied from class: `JsonParser`
      Accessor to find which token parser currently points to, if any; null will be returned if none. If return value is non-null, data associated with the token is available via other accessor methods.
      Overrides:
        `currentToken` in class `JsonParser`
      Returns:
        Type of the token this parser currently points to, if any: null before any tokens have been read, and after end-of-input has been encountered, as well as if the current token has been explicitly cleared.

    - #### currentTokenId

          public int currentTokenId()

      Description copied from class: `JsonParser`
      Method similar to `JsonParser.getCurrentToken()` but that returns an `int` instead of `JsonToken` (enum value).

      Use of int directly is typically more efficient on switch statements, so this method may be useful when building low-overhead codecs. Note, however, that effect may not be big enough to matter: make sure to profile performance before deciding to use this method.

      Overrides:
        `currentTokenId` in class `JsonParser`
      Returns:
        `int` matching one of constants from `JsonTokenId`.

    - #### getCurrentToken

          public JsonToken getCurrentToken()

      Description copied from class: `JsonParser`
      Alias for `JsonParser.currentToken()`, will be deprecated in Jackson 2.9
      Specified by:
        `getCurrentToken` in class `JsonParser`

    - #### getCurrentTokenId

          public int getCurrentTokenId()

      Description copied from class: `JsonParser`
      Alias for `JsonParser.currentTokenId()`, will be deprecated in Jackson 2.9
      Specified by:
        `getCurrentTokenId` in class `JsonParser`

    - #### hasCurrentToken

          public boolean hasCurrentToken()

      Description copied from class: `JsonParser`
      Method for checking whether parser currently points to a token (and data for that token is available). Equivalent to check for `parser.getCurrentToken() != null`.
      Specified by:
        `hasCurrentToken` in class `JsonParser`
      Returns:
        True if the parser just returned a valid token via `JsonParser.nextToken()`; false otherwise (parser was just constructed, encountered end-of-input and returned null from `JsonParser.nextToken()`, or the token has been consumed)

    - #### hasTokenId

          public boolean hasTokenId(int id)

      Description copied from class: `JsonParser`
      Method that is functionally equivalent to: `return currentTokenId() == id` but may be more efficiently implemented.

      Note that no traversal or conversion is performed; so in some cases calling method like `JsonParser.isExpectedStartArrayToken()` is necessary instead.

      Specified by:
        `hasTokenId` in class `JsonParser`

    - #### hasToken

          public boolean hasToken(JsonToken t)

      Description copied from class: `JsonParser`
      Method that is functionally equivalent to: `return currentToken() == t` but may be more efficiently implemented.

      Note that no traversal or conversion is performed; so in some cases calling method like `JsonParser.isExpectedStartArrayToken()` is necessary instead.

      Specified by:
        `hasToken` in class `JsonParser`

    - #### getCurrentName

          public String getCurrentName()
                                throws IOException

      Description copied from class: `JsonParser`
      Method that can be called to get the name associated with the current token: for `JsonToken.FIELD_NAME`s it will be the same as what `JsonParser.getText()` returns; for field values it will be preceding field name; and for others (array values, root-level values) null.
      Specified by:
        `getCurrentName` in class `JsonParser`
      Throws:
        `IOException`

    - #### getCurrentLocation

          public JsonLocation getCurrentLocation()

      Description copied from class: `JsonParser`
      Method that returns location of the last processed character; usually for error reporting purposes.
      Specified by:
        `getCurrentLocation` in class `JsonParser`

    - #### getParsingContext

          public JsonStreamContext getParsingContext()

      Description copied from class: `JsonParser`
      Method that can be used to access current parsing context reader is in. There are 3 different types: root, array and object contexts, with slightly different available information. Contexts are hierarchically nested, and can be used for example for figuring out part of the input document that correspond to specific array or object (for highlighting purposes, or error reporting). Contexts can also be used for simple xpath-like matching of input, if so desired.
      Specified by:
        `getParsingContext` in class `JsonParser`

    - #### isExpectedStartArrayToken

          public boolean isExpectedStartArrayToken()

      Description copied from class: `JsonParser`
      Specialized accessor that can be used to verify that the current token indicates start array (usually meaning that current token is `JsonToken.START_ARRAY`) when start array is expected. For some specialized parsers this can return true for other cases as well; this is usually done to emulate arrays in cases underlying format is ambiguous (XML, for example, has no format-level difference between Objects and Arrays; it just has elements).

      Default implementation is equivalent to:

             currentToken() == JsonToken.START_ARRAY

      but may be overridden by custom parser implementations.
      Overrides:
        `isExpectedStartArrayToken` in class `JsonParser`
      Returns:
        True if the current token can be considered as a start-array marker (such `JsonToken.START_ARRAY`); false if not.

    - #### isExpectedStartObjectToken

          public boolean isExpectedStartObjectToken()

      Description copied from class: `JsonParser`
      Similar to `JsonParser.isExpectedStartArrayToken()`, but checks whether stream currently points to `JsonToken.START_OBJECT`.
      Overrides:
        `isExpectedStartObjectToken` in class `JsonParser`

    - #### isNaN

          public boolean isNaN()
                        throws IOException

      Description copied from class: `JsonParser`
      Access for checking whether current token is a numeric value token, but one that is of "not-a-number" (NaN) variety (including both "NaN" AND positive/negative infinity!): not supported by all formats, but often supported for `JsonToken.VALUE_NUMBER_FLOAT`. NOTE: roughly equivalent to calling `!Double.isFinite()` on value you would get from calling `JsonParser.getDoubleValue()`.
      Overrides:
        `isNaN` in class `JsonParser`
      Throws:
        `IOException`

    - #### clearCurrentToken

          public void clearCurrentToken()

      Description copied from class: `JsonParser`
      Method called to "consume" the current token by effectively removing it so that `JsonParser.hasCurrentToken()` returns false, and `JsonParser.getCurrentToken()` null). Cleared token value can still be accessed by calling `JsonParser.getLastClearedToken()` (if absolutely needed), but usually isn't.

      Method was added to be used by the optional data binder, since it has to be able to consume last token used for binding (so that it will not be used again).

      Specified by:
        `clearCurrentToken` in class `JsonParser`

    - #### getLastClearedToken

          public JsonToken getLastClearedToken()

      Description copied from class: `JsonParser`
      Method that can be called to get the last token that was cleared using `JsonParser.clearCurrentToken()`. This is not necessarily the latest token read. Will return null if no tokens have been cleared, or if parser has been closed.
      Specified by:
        `getLastClearedToken` in class `JsonParser`

    - #### overrideCurrentName

          public void overrideCurrentName(String name)

      Description copied from class: `JsonParser`
      Method that can be used to change what is considered to be the current (field) name. May be needed to support non-JSON data formats or unusual binding conventions; not needed for typical processing.

      Note that use of this method should only be done as sort of last resort, as it is a work-around for regular operation.

      Specified by:
        `overrideCurrentName` in class `JsonParser`
      Parameters:
        `name` - Name to use as the current name; may be null.

    - #### getText

          public String getText()
                         throws IOException

      Description copied from class: `JsonParser`
      Method for accessing textual representation of the current token; if no current token (before first call to `JsonParser.nextToken()`, or after encountering end-of-input), returns null. Method can be called for any token type.
      Specified by:
        `getText` in class `JsonParser`
      Throws:
        `IOException`

    - #### hasTextCharacters

          public boolean hasTextCharacters()

      Description copied from class: `JsonParser`
      Method that can be used to determine whether calling of `JsonParser.getTextCharacters()` would be the most efficient way to access textual content for the event parser currently points to.

      Default implementation simply returns false since only actual implementation class has knowledge of its internal buffering state. Implementations are strongly encouraged to properly override this method, to allow efficient copying of content by other code.

      Specified by:
        `hasTextCharacters` in class `JsonParser`
      Returns:
        True if parser currently has character array that can be efficiently returned via `JsonParser.getTextCharacters()`; false means that it may or may not exist

    - #### getTextCharacters

          public char[] getTextCharacters()
                                   throws IOException

      Description copied from class: `JsonParser`
      Method similar to `JsonParser.getText()`, but that will return underlying (unmodifiable) character array that contains textual value, instead of constructing a String object to contain this information. Note, however, that:
      - Textual contents are not guaranteed to start at index 0 (rather, call `JsonParser.getTextOffset()`) to know the actual offset
      - Length of textual contents may be less than the length of returned buffer: call `JsonParser.getTextLength()` for actual length of returned content.

      Note that caller MUST NOT modify the returned character array in any way -- doing so may corrupt current parser state and render parser instance useless.

      The only reason to call this method (over `JsonParser.getText()`) is to avoid construction of a String object (which will make a copy of contents).

      Specified by:
        `getTextCharacters` in class `JsonParser`
      Throws:
        `IOException`

    - #### getTextLength

          public int getTextLength()
                            throws IOException

      Description copied from class: `JsonParser`
      Accessor used with `JsonParser.getTextCharacters()`, to know length of String stored in returned buffer.
      Specified by:
        `getTextLength` in class `JsonParser`
      Returns:
        Number of characters within buffer returned by `JsonParser.getTextCharacters()` that are part of textual content of the current token.
      Throws:
        `IOException`

    - #### getTextOffset

          public int getTextOffset()
                            throws IOException

      Description copied from class: `JsonParser`
      Accessor used with `JsonParser.getTextCharacters()`, to know offset of the first text content character within buffer.
      Specified by:
        `getTextOffset` in class `JsonParser`
      Returns:
        Offset of the first character within buffer returned by `JsonParser.getTextCharacters()` that is part of textual content of the current token.
      Throws:
        `IOException`

    - #### getText

          public int getText(Writer writer)
                      throws IOException,
                             UnsupportedOperationException

      Description copied from class: `JsonParser`
      Method to read the textual representation of the current token in chunks and pass it to the given Writer. Conceptually same as calling:

            writer.write(parser.getText());

      but should typically be more efficient as longer content does need to be combined into a single `String` to return, and write can occur directly from intermediate buffers Jackson uses.
      Overrides:
        `getText` in class `JsonParser`
      Returns:
        The number of characters written to the Writer
      Throws:
        `IOException`
        `UnsupportedOperationException`

    - #### getBigIntegerValue

          public BigInteger getBigIntegerValue()
                                        throws IOException

      Description copied from class: `JsonParser`
      Numeric accessor that can be called when the current token is of type `JsonToken.VALUE_NUMBER_INT` and it can not be used as a Java long primitive type due to its magnitude. It can also be called for `JsonToken.VALUE_NUMBER_FLOAT`; if so, it is equivalent to calling `JsonParser.getDecimalValue()` and then constructing a `BigInteger` from that value.
      Specified by:
        `getBigIntegerValue` in class `JsonParser`
      Throws:
        `IOException`

    - #### getBooleanValue

          public boolean getBooleanValue()
                                  throws IOException

      Description copied from class: `JsonParser`
      Convenience accessor that can be called when the current token is `JsonToken.VALUE_TRUE` or `JsonToken.VALUE_FALSE`.

      Note: if the token is not of above-mentioned boolean types, an integer, but its value falls outside of range of Java long, a `JsonParseException` may be thrown to indicate numeric overflow/underflow.

      Overrides:
        `getBooleanValue` in class `JsonParser`
      Throws:
        `IOException`

    - #### getByteValue

          public byte getByteValue()
                            throws IOException

      Description copied from class: `JsonParser`
      Numeric accessor that can be called when the current token is of type `JsonToken.VALUE_NUMBER_INT` and it can be expressed as a value of Java byte primitive type. It can also be called for `JsonToken.VALUE_NUMBER_FLOAT`; if so, it is equivalent to calling `JsonParser.getDoubleValue()` and then casting; except for possible overflow/underflow exception.

      Note: if the resulting integer value falls outside range of Java byte, a `JsonParseException` will be thrown to indicate numeric overflow/underflow.

      Overrides:
        `getByteValue` in class `JsonParser`
      Throws:
        `IOException`

    - #### getShortValue

          public short getShortValue()
                              throws IOException

      Description copied from class: `JsonParser`
      Numeric accessor that can be called when the current token is of type `JsonToken.VALUE_NUMBER_INT` and it can be expressed as a value of Java short primitive type. It can also be called for `JsonToken.VALUE_NUMBER_FLOAT`; if so, it is equivalent to calling `JsonParser.getDoubleValue()` and then casting; except for possible overflow/underflow exception.

      Note: if the resulting integer value falls outside range of Java short, a `JsonParseException` will be thrown to indicate numeric overflow/underflow.

      Overrides:
        `getShortValue` in class `JsonParser`
      Throws:
        `IOException`

    - #### getDecimalValue

          public BigDecimal getDecimalValue()
                                     throws IOException

      Description copied from class: `JsonParser`
      Numeric accessor that can be called when the current token is of type `JsonToken.VALUE_NUMBER_FLOAT` or `JsonToken.VALUE_NUMBER_INT`. No under/overflow exceptions are ever thrown.
      Specified by:
        `getDecimalValue` in class `JsonParser`
      Throws:
        `IOException`

    - #### getDoubleValue

          public double getDoubleValue()
                                throws IOException

      Description copied from class: `JsonParser`
      Numeric accessor that can be called when the current token is of type `JsonToken.VALUE_NUMBER_FLOAT` and it can be expressed as a Java double primitive type. It can also be called for `JsonToken.VALUE_NUMBER_INT`; if so, it is equivalent to calling `JsonParser.getLongValue()` and then casting; except for possible overflow/underflow exception.

      Note: if the value falls outside of range of Java double, a `JsonParseException` will be thrown to indicate numeric overflow/underflow.

      Specified by:
        `getDoubleValue` in class `JsonParser`
      Throws:
        `IOException`

    - #### getFloatValue

          public float getFloatValue()
                              throws IOException

      Description copied from class: `JsonParser`
      Numeric accessor that can be called when the current token is of type `JsonToken.VALUE_NUMBER_FLOAT` and it can be expressed as a Java float primitive type. It can also be called for `JsonToken.VALUE_NUMBER_INT`; if so, it is equivalent to calling `JsonParser.getLongValue()` and then casting; except for possible overflow/underflow exception.

      Note: if the value falls outside of range of Java float, a `JsonParseException` will be thrown to indicate numeric overflow/underflow.

      Specified by:
        `getFloatValue` in class `JsonParser`
      Throws:
        `IOException`

    - #### getIntValue

          public int getIntValue()
                          throws IOException

      Description copied from class: `JsonParser`
      Numeric accessor that can be called when the current token is of type `JsonToken.VALUE_NUMBER_INT` and it can be expressed as a value of Java int primitive type. It can also be called for `JsonToken.VALUE_NUMBER_FLOAT`; if so, it is equivalent to calling `JsonParser.getDoubleValue()` and then casting; except for possible overflow/underflow exception.

      Note: if the resulting integer value falls outside range of Java int, a `JsonParseException` may be thrown to indicate numeric overflow/underflow.

      Specified by:
        `getIntValue` in class `JsonParser`
      Throws:
        `IOException`

    - #### getLongValue

          public long getLongValue()
                            throws IOException

      Description copied from class: `JsonParser`
      Numeric accessor that can be called when the current token is of type `JsonToken.VALUE_NUMBER_INT` and it can be expressed as a Java long primitive type. It can also be called for `JsonToken.VALUE_NUMBER_FLOAT`; if so, it is equivalent to calling `JsonParser.getDoubleValue()` and then casting to int; except for possible overflow/underflow exception.

      Note: if the token is an integer, but its value falls outside of range of Java long, a `JsonParseException` may be thrown to indicate numeric overflow/underflow.

      Specified by:
        `getLongValue` in class `JsonParser`
      Throws:
        `IOException`

    - #### getNumberType

          public JsonParser.NumberType getNumberType()
                                              throws IOException

      Description copied from class: `JsonParser`
      If current token is of type `JsonToken.VALUE_NUMBER_INT` or `JsonToken.VALUE_NUMBER_FLOAT`, returns one of `JsonParser.NumberType` constants; otherwise returns null.
      Specified by:
        `getNumberType` in class `JsonParser`
      Throws:
        `IOException`

    - #### getNumberValue

          public Number getNumberValue()
                                throws IOException

      Description copied from class: `JsonParser`
      Generic number value accessor method that will work for all kinds of numeric values. It will return the optimal (simplest/smallest possible) wrapper object that can express the numeric value just parsed.
      Specified by:
        `getNumberValue` in class `JsonParser`
      Throws:
        `IOException`

    - #### getValueAsInt

          public int getValueAsInt()
                            throws IOException

      Description copied from class: `JsonParser`
      Method that will try to convert value of current token to a int. Numbers are coerced using default Java rules; booleans convert to 0 (false) and 1 (true), and Strings are parsed using default Java language integer parsing rules.

      If representation can not be converted to an int (including structured type markers like start/end Object/Array) default value of 0 will be returned; no exceptions are thrown.

      Overrides:
        `getValueAsInt` in class `JsonParser`
      Throws:
        `IOException`

    - #### getValueAsInt

          public int getValueAsInt(int defaultValue)
                            throws IOException

      Description copied from class: `JsonParser`
      Method that will try to convert value of current token to a int. Numbers are coerced using default Java rules; booleans convert to 0 (false) and 1 (true), and Strings are parsed using default Java language integer parsing rules.

      If representation can not be converted to an int (including structured type markers like start/end Object/Array) specified def will be returned; no exceptions are thrown.

      Overrides:
        `getValueAsInt` in class `JsonParser`
      Throws:
        `IOException`

    - #### getValueAsLong

          public long getValueAsLong()
                              throws IOException

      Description copied from class: `JsonParser`
      Method that will try to convert value of current token to a long. Numbers are coerced using default Java rules; booleans convert to 0 (false) and 1 (true), and Strings are parsed using default Java language integer parsing rules.

      If representation can not be converted to a long (including structured type markers like start/end Object/Array) default value of 0L will be returned; no exceptions are thrown.

      Overrides:
        `getValueAsLong` in class `JsonParser`
      Throws:
        `IOException`

    - #### getValueAsLong

          public long getValueAsLong(long defaultValue)
                              throws IOException

      Description copied from class: `JsonParser`
      Method that will try to convert value of current token to a long. Numbers are coerced using default Java rules; booleans convert to 0 (false) and 1 (true), and Strings are parsed using default Java language integer parsing rules.

      If representation can not be converted to a long (including structured type markers like start/end Object/Array) specified def will be returned; no exceptions are thrown.

      Overrides:
        `getValueAsLong` in class `JsonParser`
      Throws:
        `IOException`

    - #### getValueAsDouble

          public double getValueAsDouble()
                                  throws IOException

      Description copied from class: `JsonParser`
      Method that will try to convert value of current token to a Java double. Numbers are coerced using default Java rules; booleans convert to 0.0 (false) and 1.0 (true), and Strings are parsed using default Java language floating point parsing rules.

      If representation can not be converted to a double (including structured types like Objects and Arrays), default value of 0.0 will be returned; no exceptions are thrown.

      Overrides:
        `getValueAsDouble` in class `JsonParser`
      Throws:
        `IOException`

    - #### getValueAsDouble

          public double getValueAsDouble(double defaultValue)
                                  throws IOException

      Description copied from class: `JsonParser`
      Method that will try to convert value of current token to a Java double. Numbers are coerced using default Java rules; booleans convert to 0.0 (false) and 1.0 (true), and Strings are parsed using default Java language floating point parsing rules.

      If representation can not be converted to a double (including structured types like Objects and Arrays), specified def will be returned; no exceptions are thrown.

      Overrides:
        `getValueAsDouble` in class `JsonParser`
      Throws:
        `IOException`

    - #### getValueAsBoolean

          public boolean getValueAsBoolean()
                                    throws IOException

      Description copied from class: `JsonParser`
      Method that will try to convert value of current token to a boolean. JSON booleans map naturally; integer numbers other than 0 map to true, and 0 maps to false and Strings 'true' and 'false' map to corresponding values.

      If representation can not be converted to a boolean value (including structured types like Objects and Arrays), default value of false will be returned; no exceptions are thrown.

      Overrides:
        `getValueAsBoolean` in class `JsonParser`
      Throws:
        `IOException`

    - #### getValueAsBoolean

          public boolean getValueAsBoolean(boolean defaultValue)
                                    throws IOException

      Description copied from class: `JsonParser`
      Method that will try to convert value of current token to a boolean. JSON booleans map naturally; integer numbers other than 0 map to true, and 0 maps to false and Strings 'true' and 'false' map to corresponding values.

      If representation can not be converted to a boolean value (including structured types like Objects and Arrays), specified def will be returned; no exceptions are thrown.

      Overrides:
        `getValueAsBoolean` in class `JsonParser`
      Throws:
        `IOException`

    - #### getValueAsString

          public String getValueAsString()
                                  throws IOException

      Description copied from class: `JsonParser`
      Method that will try to convert value of current token to a `String`. JSON Strings map naturally; scalar values get converted to their textual representation. If representation can not be converted to a String value (including structured types like Objects and Arrays and null token), default value of null will be returned; no exceptions are thrown.
      Overrides:
        `getValueAsString` in class `JsonParser`
      Throws:
        `IOException`

    - #### getValueAsString

          public String getValueAsString(String defaultValue)
                                  throws IOException

      Description copied from class: `JsonParser`
      Method that will try to convert value of current token to a `String`. JSON Strings map naturally; scalar values get converted to their textual representation. If representation can not be converted to a String value (including structured types like Objects and Arrays and null token), specified default value will be returned; no exceptions are thrown.
      Specified by:
        `getValueAsString` in class `JsonParser`
      Throws:
        `IOException`

    - #### getEmbeddedObject

          public Object getEmbeddedObject()
                                   throws IOException

      Description copied from class: `JsonParser`
      Accessor that can be called if (and only if) the current token is `JsonToken.VALUE_EMBEDDED_OBJECT`. For other token types, null is returned.

      Note: only some specialized parser implementations support embedding of objects (usually ones that are facades on top of non-streaming sources, such as object trees). One exception is access to binary content (whether via base64 encoding or not) which typically is accessible using this method, as well as `JsonParser.getBinaryValue()`.

      Overrides:
        `getEmbeddedObject` in class `JsonParser`
      Throws:
        `IOException`

    - #### getBinaryValue

          public byte[] getBinaryValue(Base64Variant b64variant)
                                throws IOException

      Description copied from class: `JsonParser`
      Method that can be used to read (and consume -- results may not be accessible using other methods after the call) base64-encoded binary data included in the current textual JSON value. It works similar to getting String value via `JsonParser.getText()` and decoding result (except for decoding part), but should be significantly more performant.

      Note that non-decoded textual contents of the current token are not guaranteed to be accessible after this method is called. Current implementation, for example, clears up textual content during decoding. Decoded binary content, however, will be retained until parser is advanced to the next event.

      Specified by:
        `getBinaryValue` in class `JsonParser`
      Parameters:
        `b64variant` - Expected variant of base64 encoded content (see `Base64Variants` for definitions of "standard" variants).
      Returns:
        Decoded binary data
      Throws:
        `IOException`

    - #### readBinaryValue

          public int readBinaryValue(Base64Variant b64variant,
                                     OutputStream out)
                              throws IOException

      Description copied from class: `JsonParser`
      Similar to `JsonParser.readBinaryValue(OutputStream)` but allows explicitly specifying base64 variant to use.
      Overrides:
        `readBinaryValue` in class `JsonParser`
      Parameters:
        `b64variant` - base64 variant to use
        `out` - Output stream to use for passing decoded binary data
      Returns:
        Number of bytes that were decoded and written via `OutputStream`
      Throws:
        `IOException`

    - #### getTokenLocation

          public JsonLocation getTokenLocation()

      Description copied from class: `JsonParser`
      Method that return the starting location of the current token; that is, position of the first character from input that starts the current token.
      Specified by:
        `getTokenLocation` in class `JsonParser`

    - #### nextToken

          public JsonToken nextToken()
                              throws IOException

      Description copied from class: `JsonParser`
      Main iteration method, which will advance stream enough to determine type of the next token, if any. If none remaining (stream has no content other than possible white space before ending), null will be returned.
      Specified by:
        `nextToken` in class `JsonParser`
      Returns:
        Next token from the stream, if any found, or null to indicate end-of-input
      Throws:
        `IOException`

    - #### nextValue

          public JsonToken nextValue()
                              throws IOException

      Description copied from class: `JsonParser`
      Iteration method that will advance stream enough to determine type of the next token that is a value type (including JSON Array and Object start/end markers). Or put another way, nextToken() will be called once, and if `JsonToken.FIELD_NAME` is returned, another time to get the value for the field. Method is most useful for iterating over value entries of JSON objects; field name will still be available by calling `JsonParser.getCurrentName()` when parser points to the value.
      Specified by:
        `nextValue` in class `JsonParser`
      Returns:
        Next non-field-name token from the stream, if any found, or null to indicate end-of-input (or, for non-blocking parsers, `JsonToken.NOT_AVAILABLE` if no tokens were available yet)
      Throws:
        `IOException`

    - #### finishToken

          public void finishToken()
                           throws IOException

      Description copied from class: `JsonParser`
      Method that may be used to force full handling of the current token so that even if lazy processing is enabled, the whole contents are read for possible retrieval. This is usually used to ensure that the token end location is available, as well as token contents (similar to what calling, say `JsonParser.getTextCharacters()`, would achieve).

      Note that for many dataformat implementations this method will not do anything; this is the default implementation unless overridden by sub-classes.

      Overrides:
        `finishToken` in class `JsonParser`
      Throws:
        `IOException`

    - #### skipChildren

          public JsonParser skipChildren()
                                  throws IOException

      Description copied from class: `JsonParser`
      Method that will skip all child tokens of an array or object token that the parser currently points to, iff stream points to `JsonToken.START_OBJECT` or `JsonToken.START_ARRAY`. If not, it will do nothing. After skipping, stream will point to matching `JsonToken.END_OBJECT` or `JsonToken.END_ARRAY` (possibly skipping nested pairs of START/END OBJECT/ARRAY tokens as well as value tokens). The idea is that after calling this method, application will call `JsonParser.nextToken()` to point to the next available token, if any.
      Specified by:
        `skipChildren` in class `JsonParser`
      Throws:
        `IOException`

    - #### canReadObjectId

          public boolean canReadObjectId()

      Description copied from class: `JsonParser`
      Introspection method that may be called to see if the underlying data format supports some kind of Object Ids natively (many do not; for example, JSON doesn't).

      Default implementation returns true; overridden by data formats that do support native Object Ids. Caller is expected to either use a non-native notation (explicit property or such), or fail, in case it can not use native object ids.

      Overrides:
        `canReadObjectId` in class `JsonParser`

    - #### canReadTypeId

          public boolean canReadTypeId()

      Description copied from class: `JsonParser`
      Introspection method that may be called to see if the underlying data format supports some kind of Type Ids natively (many do not; for example, JSON doesn't).

      Default implementation returns true; overridden by data formats that do support native Type Ids. Caller is expected to either use a non-native notation (explicit property or such), or fail, in case it can not use native type ids.

      Overrides:
        `canReadTypeId` in class `JsonParser`

    - #### getObjectId

          public Object getObjectId()
                             throws IOException

      Description copied from class: `JsonParser`
      Method that can be called to check whether current token (one that was just read) has an associated Object id, and if so, return it. Note that while typically caller should check with `JsonParser.canReadObjectId()` first, it is not illegal to call this method even if that method returns true; but if so, it will return null. This may be used to simplify calling code.

      Default implementation will simply return null.

      Overrides:
        `getObjectId` in class `JsonParser`
      Throws:
        `IOException`

    - #### getTypeId

          public Object getTypeId()
                           throws IOException

      Description copied from class: `JsonParser`
      Method that can be called to check whether current token (one that was just read) has an associated type id, and if so, return it. Note that while typically caller should check with `JsonParser.canReadTypeId()` first, it is not illegal to call this method even if that method returns true; but if so, it will return null. This may be used to simplify calling code.

      Default implementation will simply return null.

      Overrides:
        `getTypeId` in class `JsonParser`
      Throws:
        `IOException`

    - #### delegate

          public JsonParser delegate()

      Accessor for getting the immediate `JsonParser` this parser delegates calls to.
      Since:
        2.10

Copyright © 2008–2019 FasterXML. All rights reserved.