105 lines
3.0 KiB
Java
105 lines
3.0 KiB
Java
/*
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* Copyright (C) 2013 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.makedict;
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import com.android.inputmethod.annotations.UsedForTesting;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.TreeMap;
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/**
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* A base class of the binary dictionary decoder.
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*/
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public abstract class AbstractDictDecoder implements DictDecoder {
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private static final int SUCCESS = 0;
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private static final int ERROR_CANNOT_READ = 1;
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private static final int ERROR_WRONG_FORMAT = 2;
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@Override @UsedForTesting
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public int getTerminalPosition(final String word)
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throws IOException, UnsupportedFormatException {
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if (!isDictBufferOpen()) {
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openDictBuffer();
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}
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return BinaryDictIOUtils.getTerminalPosition(this, word);
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}
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@Override @UsedForTesting
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public void readUnigramsAndBigramsBinary(final TreeMap<Integer, String> words,
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final TreeMap<Integer, Integer> frequencies,
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final TreeMap<Integer, ArrayList<PendingAttribute>> bigrams)
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throws IOException, UnsupportedFormatException {
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if (!isDictBufferOpen()) {
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openDictBuffer();
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}
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BinaryDictIOUtils.readUnigramsAndBigramsBinary(this, words, frequencies, bigrams);
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}
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/**
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* Check whether the header contains the expected information. This is a no-error method,
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* that will return an error code and never throw a checked exception.
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* @return an error code, either ERROR_* or SUCCESS.
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*/
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private int checkHeader() {
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try {
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readHeader();
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} catch (IOException e) {
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return ERROR_CANNOT_READ;
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} catch (UnsupportedFormatException e) {
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return ERROR_WRONG_FORMAT;
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}
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return SUCCESS;
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}
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@Override
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public boolean hasValidRawBinaryDictionary() {
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return checkHeader() == SUCCESS;
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}
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// Placeholder implementations below. These are actually unused.
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@Override
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public void openDictBuffer() throws FileNotFoundException, IOException,
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UnsupportedFormatException {
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}
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@Override
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public boolean isDictBufferOpen() {
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return false;
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}
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@Override
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public PtNodeInfo readPtNode(final int ptNodePos) {
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return null;
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}
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@Override
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public void setPosition(int newPos) {
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}
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@Override
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public int getPosition() {
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return 0;
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}
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@Override
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public int readPtNodeCount() {
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return 0;
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}
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}
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