/*
* Copyright 2009-2012 Amazon Technologies, Inc.
*
* 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://aws.amazon.com/apache2.0
*
* This file 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.amazonaws.eclipse.ec2;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import com.amazonaws.services.ec2.model.Tag;
/**
* Class that knows how to return a list of tags as text.
*/
public class TagFormatter {
/**
* Returns a formatted string representing the tags given. They will be
* sorted by their keys.
*/
public static String formatTags(List<Tag> tags) {
if (tags == null || tags.isEmpty()) return "";
Collections.sort(tags, new Comparator<Tag>() {
public int compare(Tag o1, Tag o2) {
return o1.getKey().compareTo(o2.getKey());
}
});
StringBuilder allTags = new StringBuilder();
boolean first = true;
for (Tag tag : tags) {
if (first) {
first = false;
} else {
allTags.append("; ");
}
allTags.append(tag.getKey()).append("=").append(tag.getValue());
}
return allTags.toString();
}
}