package org.frameworkset.http.converter;

import java.io.IOException;
import java.lang.reflect.Type;

import org.frameworkset.http.HttpInputMessage;
import org.frameworkset.http.HttpOutputMessage;
import org.frameworkset.http.MediaType;
import org.frameworkset.http.converter.HttpMessageConverter;
import org.frameworkset.http.converter.HttpMessageNotReadableException;
import org.frameworkset.http.converter.HttpMessageNotWritableException;

public interface GenericHttpMessageConverter<T>  extends HttpMessageConverter<T> {

	/**
	 * Indicates whether the given type can be read by this converter.
	 * This method should perform the same checks than
	 * {@link HttpMessageConverter#canRead(Class, MediaType)} with additional ones
	 * related to the generic type.
	 * @param type the (potentially generic) type to test for readability
	 * @param contextClass a context class for the target type, for example a class
	 * in which the target type appears in a method signature (can be {@code null})
	 * @param mediaType the media type to read, can be {@code null} if not specified.
	 * Typically the value of a {@code Content-Type} header.
	 * @return {@code true} if readable; {@code false} otherwise
	 */
	boolean canRead(Type type, Class<?> contextClass, MediaType mediaType);

	/**
	 * Read an object of the given type form the given input message, and returns it.
	 * @param type the (potentially generic) type of object to return. This type must have
	 * previously been passed to the {@link #canRead canRead} method of this interface,
	 * which must have returned {@code true}.
	 * @param contextClass a context class for the target type, for example a class
	 * in which the target type appears in a method signature (can be {@code null})
	 * @param inputMessage the HTTP input message to read from
	 * @return the converted object
	 * @throws IOException in case of I/O errors
	 * @throws HttpMessageNotReadableException in case of conversion errors
	 */
	T read(Type type, Class<?> contextClass, HttpInputMessage inputMessage)
			throws IOException, HttpMessageNotReadableException;

	/**
	 * Indicates whether the given class can be written by this converter.
	 * This method should perform the same checks than
	 * {@link HttpMessageConverter#canWrite(Class, MediaType)} with additional ones
	 * related to the generic type.
	 * @param type the (potentially generic) type to test for writability, can be
	 * {@code null} if not specified.
	 * @param clazz the source object class to test for writability
	 * @param mediaType the media type to write, can be {@code null} if not specified.
	 * Typically the value of an {@code Accept} header.
	 * @return {@code true} if writable; {@code false} otherwise
	 * @since 4.2
	 */
	boolean canWrite(Type type, Class<?> clazz, MediaType mediaType);

	/**
	 * Write an given object to the given output message.
	 * @param t the object to write to the output message. The type of this object must
	 * have previously been passed to the {@link #canWrite canWrite} method of this
	 * interface, which must have returned {@code true}.
	 * @param type the (potentially generic) type of object to write. This type must have
	 * previously been passed to the {@link #canWrite canWrite} method of this interface,
	 * which must have returned {@code true}. Can be {@code null} if not specified.
	 * @param contentType the content type to use when writing. May be {@code null} to
	 * indicate that the default content type of the converter must be used. If not
	 * {@code null}, this media type must have previously been passed to the
	 * {@link #canWrite canWrite} method of this interface, which must have returned
	 * {@code true}.
	 * @param outputMessage the message to write to
	 * @throws IOException in case of I/O errors
	 * @throws HttpMessageNotWritableException in case of conversion errors
	 * @since 4.2
	 */
	void write(T t, Type type, MediaType contentType, HttpOutputMessage outputMessage,HttpInputMessage inputMessage)
			throws IOException, HttpMessageNotWritableException;
}
