123 lines
4.5 KiB
Java
123 lines
4.5 KiB
Java
/*
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* Copyright (C) 2011 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.inputmethod.latin;
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import com.android.inputmethod.keyboard.ProximityInfo;
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import com.android.inputmethod.latin.SuggestedWords.SuggestedWordInfo;
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import android.util.Log;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.concurrent.CopyOnWriteArrayList;
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/**
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* Class for a collection of dictionaries that behave like one dictionary.
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*/
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public final class DictionaryCollection extends Dictionary {
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private final String TAG = DictionaryCollection.class.getSimpleName();
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protected final CopyOnWriteArrayList<Dictionary> mDictionaries;
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public DictionaryCollection(final String dictType) {
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super(dictType);
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mDictionaries = CollectionUtils.newCopyOnWriteArrayList();
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}
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public DictionaryCollection(final String dictType, final Dictionary... dictionaries) {
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super(dictType);
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if (null == dictionaries) {
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mDictionaries = CollectionUtils.newCopyOnWriteArrayList();
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} else {
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mDictionaries = CollectionUtils.newCopyOnWriteArrayList(dictionaries);
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mDictionaries.removeAll(Collections.singleton(null));
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}
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}
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public DictionaryCollection(final String dictType, final Collection<Dictionary> dictionaries) {
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super(dictType);
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mDictionaries = CollectionUtils.newCopyOnWriteArrayList(dictionaries);
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mDictionaries.removeAll(Collections.singleton(null));
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}
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@Override
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public ArrayList<SuggestedWordInfo> getSuggestions(final WordComposer composer,
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final String prevWord, final ProximityInfo proximityInfo) {
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final CopyOnWriteArrayList<Dictionary> dictionaries = mDictionaries;
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if (dictionaries.isEmpty()) return null;
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// To avoid creating unnecessary objects, we get the list out of the first
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// dictionary and add the rest to it if not null, hence the get(0)
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ArrayList<SuggestedWordInfo> suggestions = dictionaries.get(0).getSuggestions(composer,
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prevWord, proximityInfo);
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if (null == suggestions) suggestions = CollectionUtils.newArrayList();
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final int length = dictionaries.size();
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for (int i = 1; i < length; ++ i) {
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final ArrayList<SuggestedWordInfo> sugg = dictionaries.get(i).getSuggestions(composer,
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prevWord, proximityInfo);
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if (null != sugg) suggestions.addAll(sugg);
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}
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return suggestions;
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}
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@Override
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public boolean isValidWord(final String word) {
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for (int i = mDictionaries.size() - 1; i >= 0; --i)
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if (mDictionaries.get(i).isValidWord(word)) return true;
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return false;
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}
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@Override
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public int getFrequency(final String word) {
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int maxFreq = -1;
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for (int i = mDictionaries.size() - 1; i >= 0; --i) {
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final int tempFreq = mDictionaries.get(i).getFrequency(word);
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if (tempFreq >= maxFreq) {
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maxFreq = tempFreq;
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}
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}
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return maxFreq;
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}
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@Override
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public boolean isInitialized() {
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return !mDictionaries.isEmpty();
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}
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@Override
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public void close() {
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for (final Dictionary dict : mDictionaries)
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dict.close();
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}
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// Warning: this is not thread-safe. Take necessary precaution when calling.
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public void addDictionary(final Dictionary newDict) {
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if (null == newDict) return;
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if (mDictionaries.contains(newDict)) {
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Log.w(TAG, "This collection already contains this dictionary: " + newDict);
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}
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mDictionaries.add(newDict);
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}
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// Warning: this is not thread-safe. Take necessary precaution when calling.
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public void removeDictionary(final Dictionary dict) {
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if (mDictionaries.contains(dict)) {
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mDictionaries.remove(dict);
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} else {
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Log.w(TAG, "This collection does not contain this dictionary: " + dict);
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}
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}
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}
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