1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not 5 * use this file except in compliance with the License. You may obtain a copy of 6 * 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, WITHOUT 12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 13 * License for the specific language governing permissions and limitations under 14 * the License. 15 */ 16 17 package com.android.inputmethod.latin; 18 19 import com.android.inputmethod.keyboard.ProximityInfo; 20 21 import android.util.Log; 22 23 import java.util.Collection; 24 import java.util.Collections; 25 import java.util.concurrent.CopyOnWriteArrayList; 26 27 /** 28 * Class for a collection of dictionaries that behave like one dictionary. 29 */ 30 public class DictionaryCollection extends Dictionary { 31 private final String TAG = DictionaryCollection.class.getSimpleName(); 32 protected final CopyOnWriteArrayList<Dictionary> mDictionaries; 33 34 public DictionaryCollection() { 35 mDictionaries = new CopyOnWriteArrayList<Dictionary>(); 36 } 37 38 public DictionaryCollection(Dictionary... dictionaries) { 39 if (null == dictionaries) { 40 mDictionaries = new CopyOnWriteArrayList<Dictionary>(); 41 } else { 42 mDictionaries = new CopyOnWriteArrayList<Dictionary>(dictionaries); 43 mDictionaries.removeAll(Collections.singleton(null)); 44 } 45 } 46 47 public DictionaryCollection(Collection<Dictionary> dictionaries) { 48 mDictionaries = new CopyOnWriteArrayList<Dictionary>(dictionaries); 49 mDictionaries.removeAll(Collections.singleton(null)); 50 } 51 52 @Override 53 public void getWords(final WordComposer composer, final CharSequence prevWordForBigrams, 54 final WordCallback callback, final ProximityInfo proximityInfo) { 55 for (final Dictionary dict : mDictionaries) 56 dict.getWords(composer, prevWordForBigrams, callback, proximityInfo); 57 } 58 59 @Override 60 public void getBigrams(final WordComposer composer, final CharSequence previousWord, 61 final WordCallback callback) { 62 for (final Dictionary dict : mDictionaries) 63 dict.getBigrams(composer, previousWord, callback); 64 } 65 66 @Override 67 public boolean isValidWord(CharSequence word) { 68 for (int i = mDictionaries.size() - 1; i >= 0; --i) 69 if (mDictionaries.get(i).isValidWord(word)) return true; 70 return false; 71 } 72 73 @Override 74 public int getFrequency(CharSequence word) { 75 int maxFreq = -1; 76 for (int i = mDictionaries.size() - 1; i >= 0; --i) { 77 final int tempFreq = mDictionaries.get(i).getFrequency(word); 78 if (tempFreq >= maxFreq) { 79 maxFreq = tempFreq; 80 } 81 } 82 return maxFreq; 83 } 84 85 public boolean isEmpty() { 86 return mDictionaries.isEmpty(); 87 } 88 89 @Override 90 public void close() { 91 for (final Dictionary dict : mDictionaries) 92 dict.close(); 93 } 94 95 // Warning: this is not thread-safe. Take necessary precaution when calling. 96 public void addDictionary(final Dictionary newDict) { 97 if (null == newDict) return; 98 if (mDictionaries.contains(newDict)) { 99 Log.w(TAG, "This collection already contains this dictionary: " + newDict); 100 } 101 mDictionaries.add(newDict); 102 } 103 104 // Warning: this is not thread-safe. Take necessary precaution when calling. 105 public void removeDictionary(final Dictionary dict) { 106 if (mDictionaries.contains(dict)) { 107 mDictionaries.remove(dict); 108 } else { 109 Log.w(TAG, "This collection does not contain this dictionary: " + dict); 110 } 111 } 112 } 113
