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Provides common utility functions

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/*
 * Copyright (c) CQSE GmbH
 *
 * 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.conqat.lib.commons.collections;

import java.util.Comparator;

/**
 * Compares strings by their length. Using this comparator on a list of string makes shorter strings
 * appear first.
 * 
 * 
 * @author Florian Deissenboeck
 */
public class StringLengthComparator implements Comparator {

	/**
	 * Compare strings by their length. Using this comparator on a list of string makes shorter strings
	 * appear first. {@inheritDoc}
	 */
	@Override
	public int compare(String string1, String string2) {
		int length1;
		int length2;

		if (string1 == null) {
			length1 = 0;
		} else {
			length1 = string1.length();
		}

		if (string2 == null) {
			length2 = 0;
		} else {
			length2 = string2.length();
		}

		return length1 - length2;
	}
}