diff options
Diffstat (limited to 'src/com/android/messaging/util/ConversationIdSet.java')
-rw-r--r-- | src/com/android/messaging/util/ConversationIdSet.java | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/src/com/android/messaging/util/ConversationIdSet.java b/src/com/android/messaging/util/ConversationIdSet.java new file mode 100644 index 0000000..75bf634 --- /dev/null +++ b/src/com/android/messaging/util/ConversationIdSet.java @@ -0,0 +1,69 @@ +/* + * 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; + } + +} |