/
SizeValidatorForCollection.java
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/
SizeValidatorForCollection.java
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/*
* JBoss, Home of Professional Open Source
* Copyright 2009, 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.util.Collection;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import javax.validation.constraints.Size;
import org.hibernate.validator.internal.util.logging.Log;
import org.hibernate.validator.internal.util.logging.LoggerFactory;
/**
* Check that a string's length is between min and max.
*
* @author Hardy Ferentschik
*/
public class SizeValidatorForCollection implements ConstraintValidator<Size, Collection<?>> {
private static final Log log = LoggerFactory.make();
private int min;
private int max;
public void initialize(Size parameters) {
min = parameters.min();
max = parameters.max();
validateParameters();
}
/**
* Checks the number of entries in a map.
*
* @param collection The collection to validate.
* @param constraintValidatorContext context in which the constraint is evaluated.
*
* @return Returns <code>true</code> if the collection is <code>null</code> or the number of entries in
* <code>collection</code> is between the specified <code>min</code> and <code>max</code> values (inclusive),
* <code>false</code> otherwise.
*/
public boolean isValid(Collection<?> collection, ConstraintValidatorContext constraintValidatorContext) {
if ( collection == null ) {
return true;
}
int length = collection.size();
return length >= min && length <= max;
}
private void validateParameters() {
if ( min < 0 ) {
throw log.getMinCannotBeNegativeException();
}
if ( max < 0 ) {
throw log.getMaxCannotBeNegativeException();
}
if ( max < min ) {
throw log.getLengthCannotBeNegativeException();
}
}
}