124 lines
3.7 KiB
Java
124 lines
3.7 KiB
Java
/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.internal.telephony;
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import android.os.AsyncResult;
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import android.os.Handler;
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import android.os.Message;
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import android.util.Log;
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import com.android.internal.telephony.CommandException;
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/**
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* {@hide}
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*/
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public abstract class CallTracker extends Handler {
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private static final boolean DBG_POLL = false;
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//***** Constants
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static final int POLL_DELAY_MSEC = 250;
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protected int pendingOperations;
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protected boolean needsPoll;
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protected Message lastRelevantPoll;
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public CommandsInterface cm;
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//***** Events
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protected static final int EVENT_POLL_CALLS_RESULT = 1;
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protected static final int EVENT_CALL_STATE_CHANGE = 2;
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protected static final int EVENT_REPOLL_AFTER_DELAY = 3;
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protected static final int EVENT_OPERATION_COMPLETE = 4;
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protected static final int EVENT_GET_LAST_CALL_FAIL_CAUSE = 5;
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protected static final int EVENT_SWITCH_RESULT = 8;
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protected static final int EVENT_RADIO_AVAILABLE = 9;
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protected static final int EVENT_RADIO_NOT_AVAILABLE = 10;
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protected static final int EVENT_CONFERENCE_RESULT = 11;
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protected static final int EVENT_SEPARATE_RESULT = 12;
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protected static final int EVENT_ECT_RESULT = 13;
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protected void pollCallsWhenSafe() {
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needsPoll = true;
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if (checkNoOperationsPending()) {
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lastRelevantPoll = obtainMessage(EVENT_POLL_CALLS_RESULT);
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cm.getCurrentCalls(lastRelevantPoll);
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}
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}
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protected void
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pollCallsAfterDelay() {
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Message msg = obtainMessage();
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msg.what = EVENT_REPOLL_AFTER_DELAY;
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sendMessageDelayed(msg, POLL_DELAY_MSEC);
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}
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protected boolean
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isCommandExceptionRadioNotAvailable(Throwable e) {
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return e != null && e instanceof CommandException
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&& ((CommandException)e).getCommandError()
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== CommandException.Error.RADIO_NOT_AVAILABLE;
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}
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protected abstract void handlePollCalls(AsyncResult ar);
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protected void handleRadioAvailable() {
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pollCallsWhenSafe();
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}
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/**
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* Obtain a complete message that indicates that this operation
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* does not require polling of getCurrentCalls(). However, if other
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* operations that do need getCurrentCalls() are pending or are
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* scheduled while this operation is pending, the invocation
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* of getCurrentCalls() will be postponed until this
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* operation is also complete.
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*/
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protected Message
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obtainNoPollCompleteMessage(int what) {
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pendingOperations++;
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lastRelevantPoll = null;
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return obtainMessage(what);
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}
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/**
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* @return true if we're idle or there's a call to getCurrentCalls() pending
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* but nothing else
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*/
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private boolean
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checkNoOperationsPending() {
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if (DBG_POLL) log("checkNoOperationsPending: pendingOperations=" +
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pendingOperations);
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return pendingOperations == 0;
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}
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//***** Overridden from Handler
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public abstract void handleMessage (Message msg);
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protected abstract void log(String msg);
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}
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