// Copyright (c) 2003-present, Jodd Team (http://jodd.org)
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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package jodd.vtor.constraint;

import jodd.bean.BeanException;
import jodd.bean.BeanUtil;
import jodd.vtor.ValidationConstraint;
import jodd.vtor.ValidationConstraintContext;
import jodd.vtor.VtorException;

public class EqualToDeclaredFieldConstraint implements ValidationConstraint<EqualToDeclaredField> {

	public EqualToDeclaredFieldConstraint() {
	}

	public EqualToDeclaredFieldConstraint(final String fieldName) {
		this.fieldName = fieldName;
	}

	// ---------------------------------------------------------------- properties

	protected String fieldName;

	public String getFieldName() {
		return fieldName;
	}

	public void setFieldName(final String fieldName) {
		this.fieldName = fieldName;
	}

	// ---------------------------------------------------------------- configure

	public void configure(final EqualToDeclaredField annotation) {
		this.fieldName = annotation.value();
	}

	// ---------------------------------------------------------------- valid

	public boolean isValid(final ValidationConstraintContext vcc, final Object value) {
		return validate(vcc.getTarget(), value, fieldName);
	}

	public static boolean validate(final Object target, final Object value, final String fieldName) {
		if (value == null) {
			return true;
		}
		Object valueToCompare;
		try {
			valueToCompare = BeanUtil.declared.getProperty(target, fieldName);
		} catch (BeanException bex) {
			throw new VtorException("Invalid value: " + fieldName, bex);
		}
		if (valueToCompare == null) {
			return false;
		}
		return value.equals(valueToCompare);
	}
}