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/*
* Copyright (C) 2015 The Android Open Source Project
*
* 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.android.messaging.util;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
/**
* Utility class to make it easy to store multiple conversation id strings in a single string
* with delimeters.
*/
public class ConversationIdSet extends HashSet<String> {
private static final String JOIN_DELIMITER = "|";
private static final String SPLIT_DELIMITER = "\\|";
public ConversationIdSet() {
super();
}
public ConversationIdSet(final Collection<String> asList) {
super(asList);
}
public String first() {
if (size() > 0) {
return iterator().next();
} else {
return null;
}
}
public static ConversationIdSet createSet(final String conversationIdSetString) {
ConversationIdSet set = null;
if (conversationIdSetString != null) {
set = new ConversationIdSet(Arrays.asList(conversationIdSetString.split(
SPLIT_DELIMITER)));
}
return set;
}
public String getDelimitedString() {
return OsUtil.joinFromSetWithDelimiter(this, JOIN_DELIMITER);
}
public static String join(final String conversationIdSet1, final String conversationIdSet2) {
String joined = null;
if (conversationIdSet1 == null) {
joined = conversationIdSet2;
} else if (conversationIdSet2 != null) {
joined = conversationIdSet1 + JOIN_DELIMITER + conversationIdSet2;
}
return joined;
}
}
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