org.springmodules.validation.util.condition.collection.AtLeastCollectionCondition Maven / Gradle / Ivy
/*
* Copyright 2004-2005 the original author or authors.
*
* 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.springmodules.validation.util.condition.collection;
import java.lang.reflect.Array;
import java.util.Collection;
import java.util.Iterator;
import org.springframework.util.Assert;
import org.springmodules.validation.util.condition.Condition;
/**
* An {@link AbstractCollectionCondition} implementation that checks whether at least X elements in a collection
* or array adhere to a specific condition.
*
* @author Uri Boness
*/
public class AtLeastCollectionCondition extends AbstractCollectionElementCondition {
private int count;
/**
* Constructs a new AtLeastCollectionCondition with a given element condition.
*
* @param elementCondition The condition to be checked on the collection elements.
*/
public AtLeastCollectionCondition(Condition elementCondition, int count) {
super(elementCondition);
Assert.isTrue(count >= 0, "Count cannot be negative");
this.count = count;
}
/**
* Checks whether at least X objects in the given array adhere to the associated condition. X is determined
* by the getCount() method call.
*
* @param array The array to be checked.
* @return true if at least X objects in the given array adhere to the associated element condition,
* false otherwise.
*/
protected boolean checkArray(Object array) {
int counter = 0;
for (int i = 0; i < Array.getLength(array); i++) {
if (getElementCondition().check(Array.get(array, i))) {
counter++;
}
}
return counter >= getCount();
}
/**
* Checks whether at least X elements in the given collection adhere to the associated condition. X is
* determined by the getCount() method call.
*
* @param collection The collection to be checked.
* @return true if at least X elements in the given collection adhere to the associated element
* condition, false otherwise.
*/
protected boolean checkCollection(Collection collection) {
int counter = 0;
for (Iterator iter = collection.iterator(); iter.hasNext();) {
if (getElementCondition().check(iter.next())) {
counter++;
}
}
return counter >= getCount();
}
//=============================================== Setter/Getter ====================================================
/**
* Returns how many element must adhere to the associated condition in order for this condition to "pass".
*
* @return How many element must adhere to the associated condition in order for this condition to "pass".
*/
public int getCount() {
return count;
}
}