1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.replica.replicaisland; 18 19 import java.util.Comparator; 20 21 public class ChannelSystem extends BaseObject { 22 private static final int CHANNEL_COUNT = 8; 23 private static final ChannelComparator sChannelComparator = new ChannelComparator(); 24 private FixedSizeArray<Channel> mChannels; 25 private Channel mSearchDummy; 26 private int mRegisteredChannelCount; 27 ChannelSystem()28 public ChannelSystem() { 29 super(); 30 mChannels = new FixedSizeArray<Channel>(CHANNEL_COUNT); 31 mChannels.setComparator(sChannelComparator); 32 mSearchDummy = new Channel(); 33 34 for (int x = 0; x < CHANNEL_COUNT; x++) { 35 mChannels.add(new Channel()); 36 } 37 38 mRegisteredChannelCount = 0; 39 } 40 41 @Override reset()42 public void reset() { 43 for (int x = 0; x < CHANNEL_COUNT; x++) { 44 mChannels.get(x).name = null; 45 mChannels.get(x).value = null; 46 } 47 48 mRegisteredChannelCount = 0; 49 } 50 registerChannel(String name)51 public Channel registerChannel(String name) { 52 Channel result = null; 53 mSearchDummy.name = name; 54 final int index = mChannels.find(mSearchDummy, false); 55 if (index == -1) { 56 // Add a new channel. 57 assert mRegisteredChannelCount < CHANNEL_COUNT : "Channel pool exhausted!"; 58 59 if (mRegisteredChannelCount < CHANNEL_COUNT) { 60 result = mChannels.get(mRegisteredChannelCount); 61 mRegisteredChannelCount++; 62 result.name = name; 63 mChannels.sort(true); 64 } 65 } else { 66 result = mChannels.get(index); 67 } 68 69 return result; 70 } 71 72 public class Channel { 73 public String name; 74 public Object value; 75 } 76 77 public static class ChannelFloatValue { 78 public float value; 79 } 80 81 public static class ChannelBooleanValue { 82 public boolean value; 83 } 84 85 /** Comparator for channels. */ 86 private final static class ChannelComparator implements Comparator<Channel> { 87 public int compare(final Channel object1, final Channel object2) { 88 int result = 0; 89 if (object1 == null && object2 != null) { 90 result = 1; 91 } else if (object1 != null && object2 == null) { 92 result = -1; 93 } else if (object1 != null && object2 != null) { 94 if (object1.name == null && object2.name != null) { 95 result = 1; 96 } else if (object1.name != null && object2.name == null) { 97 result = -1; 98 } else if (object1.name != null && object2.name != null) { 99 result = object1.name.compareTo(object2.name); 100 } 101 } 102 return result; 103 } 104 } 105 106 } 107