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/*
* Copyright (C) 2011 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.inputmethod.latin;
import android.content.Context;
import android.text.TextUtils;
import android.util.Log;
import android.util.Pair;
import java.util.HashMap;
public class WhitelistDictionary extends Dictionary {
private static final boolean DBG = LatinImeLogger.sDBG;
private static final String TAG = WhitelistDictionary.class.getSimpleName();
private final HashMap<String, Pair<Integer, String>> mWhitelistWords =
new HashMap<String, Pair<Integer, String>>();
private static final WhitelistDictionary sInstance = new WhitelistDictionary();
private WhitelistDictionary() {
}
public static WhitelistDictionary init(Context context) {
synchronized (sInstance) {
if (context != null) {
sInstance.initWordlist(
context.getResources().getStringArray(R.array.wordlist_whitelist));
} else {
sInstance.mWhitelistWords.clear();
}
}
return sInstance;
}
private void initWordlist(String[] wordlist) {
mWhitelistWords.clear();
final int N = wordlist.length;
if (N % 3 != 0) {
if (DBG) {
Log.d(TAG, "The number of the whitelist is invalid.");
}
return;
}
try {
for (int i = 0; i < N; i += 3) {
final int score = Integer.valueOf(wordlist[i]);
final String before = wordlist[i + 1];
final String after = wordlist[i + 2];
if (before != null && after != null) {
mWhitelistWords.put(
before.toLowerCase(), new Pair<Integer, String>(score, after));
}
}
} catch (NumberFormatException e) {
if (DBG) {
Log.d(TAG, "The score of the word is invalid.");
}
}
}
public String getWhiteListedWord(String before) {
if (before == null) return null;
final String lowerCaseBefore = before.toLowerCase();
if(mWhitelistWords.containsKey(lowerCaseBefore)) {
if (DBG) {
Log.d(TAG, "--- found whiteListedWord: " + lowerCaseBefore);
}
return mWhitelistWords.get(lowerCaseBefore).second;
}
return null;
}
// Not used for WhitelistDictionary. We use getWhitelistedWord() in Suggest.java instead
@Override
public void getWords(WordComposer composer, WordCallback callback) {
}
@Override
public boolean isValidWord(CharSequence word) {
if (TextUtils.isEmpty(word)) return false;
return !TextUtils.isEmpty(getWhiteListedWord(word.toString()));
}
}
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