| /* |
| * Copyright (C) 2014 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.telecomm; |
| |
| import com.google.common.base.Preconditions; |
| import com.google.common.collect.HashBiMap; |
| |
| /** Utility to map {@link Call} objects to unique IDs. IDs are generated when a call is added. */ |
| class CallIdMapper { |
| private final HashBiMap<String, Call> mCalls = HashBiMap.create(); |
| private final String mCallIdPrefix; |
| private static int sIdCount; |
| |
| CallIdMapper(String callIdPrefix) { |
| ThreadUtil.checkOnMainThread(); |
| mCallIdPrefix = callIdPrefix + "@"; |
| } |
| |
| void replaceCall(Call newCall, Call callToReplace) { |
| ThreadUtil.checkOnMainThread(); |
| |
| // Use the old call's ID for the new call. |
| String callId = getCallId(callToReplace); |
| mCalls.put(callId, newCall); |
| } |
| |
| void addCall(Call call) { |
| ThreadUtil.checkOnMainThread(); |
| Preconditions.checkNotNull(call); |
| sIdCount++; |
| String callId = mCallIdPrefix + sIdCount; |
| mCalls.put(callId, call); |
| } |
| |
| void removeCall(Call call) { |
| ThreadUtil.checkOnMainThread(); |
| Preconditions.checkNotNull(call); |
| mCalls.inverse().remove(call); |
| } |
| |
| void removeCall(String callId) { |
| ThreadUtil.checkOnMainThread(); |
| mCalls.remove(callId); |
| } |
| |
| String getCallId(Call call) { |
| ThreadUtil.checkOnMainThread(); |
| Preconditions.checkNotNull(call); |
| return mCalls.inverse().get(call); |
| } |
| |
| Call getCall(Object objId) { |
| ThreadUtil.checkOnMainThread(); |
| |
| String callId = null; |
| if (objId instanceof String) { |
| callId = (String) objId; |
| } |
| checkValidCallId(callId); |
| |
| return mCalls.get(callId); |
| } |
| |
| void clear() { |
| mCalls.clear(); |
| } |
| |
| void checkValidCallId(String callId) { |
| // Note, no need for thread check, this method is thread safe. |
| if (!isValidCallId(callId)) { |
| throw new IllegalArgumentException( |
| "Invalid call ID for " + mCallIdPrefix + ": " + callId); |
| } |
| } |
| |
| boolean isValidCallId(String callId) { |
| // Note, no need for thread check, this method is thread safe. |
| return callId != null && callId.startsWith(mCallIdPrefix); |
| } |
| } |