com.vcollaborate.validation.constraints.allowedvalues.AllowdStringsValidator Maven / Gradle / Ivy

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/**
 * Copyright (C) 2012 Christian Sterzl 
 *
 * This file is part of ValidationConstraints.
 *
 * ValidationConstraints is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * ValidationConstraints is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with ValidationConstraints.  If not, see .
 */
package com.vcollaborate.validation.constraints.allowedvalues;

import java.util.ArrayList;
import java.util.List;

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;

public class AllowdStringsValidator implements
		ConstraintValidator {

	private List allowedValues;

	private boolean nullAllowed = true;

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * javax.validation.ConstraintValidator#initialize(java.lang.annotation.
	 * Annotation)
	 */
	public void initialize(final AllowedStrings constraintAnnotation) {
		allowedValues = new ArrayList();
		for (int index = 0; index < constraintAnnotation.value().length; index++) {
			allowedValues.add(constraintAnnotation.value()[index]);
		}

		nullAllowed = constraintAnnotation.nullAllowed();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.validation.ConstraintValidator#isValid(java.lang.Object,
	 * javax.validation.ConstraintValidatorContext)
	 */
	public boolean isValid(final Object value, final ConstraintValidatorContext context) {
		boolean valid = false;

		if (nullAllowed && value == null) {
			return true;
		}

		if (value instanceof String) {
			valid = allowedValues.contains(value);
		}

		return valid;
	}
}