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* Copyright 2010, Red Hat, Inc. and/or its affiliates, and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.hibernate.validator.internal.constraintvalidators;

import java.math.BigDecimal;
import java.math.BigInteger;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import javax.validation.constraints.Max;

/**
 * Check that the number being validated is less than or equal to the maximum
 * value specified.
 *
 * @author Alaa Nassef
 * @author Hardy Ferentschik
 */
public class MaxValidatorForNumber implements ConstraintValidator<Max, Number> {

	private long maxValue;

	public void initialize(Max maxValue) {
		this.maxValue = maxValue.value();
	}

	public boolean isValid(Number value, ConstraintValidatorContext constraintValidatorContext) {
		//null values are valid
		if ( value == null ) {
			return true;
		}
		if ( value instanceof BigDecimal ) {
			return ( ( BigDecimal ) value ).compareTo( BigDecimal.valueOf( maxValue ) ) != 1;
		}
		else if ( value instanceof BigInteger ) {
			return ( ( BigInteger ) value ).compareTo( BigInteger.valueOf( maxValue ) ) != 1;
		}
		else {
			long longValue = value.longValue();
			return longValue <= maxValue;
		}
	}
}
