/*
* Copyright 2012 Eric F. Savage, code@efsavage.com
*
* 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 com.ajah.util.compare;
import java.util.Comparator;
import com.ajah.util.StringUtils;
/**
* Compares a String based on its length, using {@link String#compareTo(String)}
* as a tiebreaker.
*
* @author <a href="http://efsavage.com">Eric F. Savage</a>, <a
* href="mailto:code@efsavage.com">code@efsavage.com</a>.
*/
public class StringLengthComparator implements Comparator<String> {
/*
* (non-Javadoc)
*
* @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
*/
@Override
public int compare(final String first, final String second) {
int retVal = CompareUtils.compare(StringUtils.isBlank(first), StringUtils.isBlank(second));
if (retVal == 0) {
retVal = CompareUtils.compareNulls(first, second);
}
if (retVal == 0) {
retVal = CompareUtils.compare(first.length(), second.length());
}
if (retVal == 0) {
return first.compareTo(second);
}
return retVal;
}
}