From 2fa3693c264a4c150ac307d9bb7f6f8f18cc4ffc Mon Sep 17 00:00:00 2001 From: Ken Wakasa Date: Fri, 13 Dec 2013 17:09:16 +0900 Subject: Reset to 9bd6dac4708ad94fd0257c53e977df62b152e20c The bulk merge from -bayo to klp-dev should not have been merged to master. Change-Id: I527a03a76f5247e4939a672f27c314dc11cbb854 --- .../latin/makedict/SparseTableContentReader.java | 120 +++++++++++++++++++++ 1 file changed, 120 insertions(+) create mode 100644 java/src/com/android/inputmethod/latin/makedict/SparseTableContentReader.java (limited to 'java/src/com/android/inputmethod/latin/makedict/SparseTableContentReader.java') diff --git a/java/src/com/android/inputmethod/latin/makedict/SparseTableContentReader.java b/java/src/com/android/inputmethod/latin/makedict/SparseTableContentReader.java new file mode 100644 index 000000000..06088b651 --- /dev/null +++ b/java/src/com/android/inputmethod/latin/makedict/SparseTableContentReader.java @@ -0,0 +1,120 @@ +/* + * Copyright (C) 2013 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.makedict; + +import com.android.inputmethod.latin.makedict.BinaryDictDecoderUtils.DictBuffer; +import com.android.inputmethod.latin.makedict.DictDecoder.DictionaryBufferFactory; + +import java.io.File; +import java.io.FileNotFoundException; +import java.io.IOException; + +/** + * An auxiliary class for reading SparseTable and data written by SparseTableContentWriter. + */ +public class SparseTableContentReader { + + /** + * An interface of a function which is passed to SparseTableContentReader.read. + */ + public interface SparseTableContentReaderInterface { + /** + * Reads data. + * + * @param buffer the DictBuffer. The position of the buffer is set to the head of data. + */ + public void read(final DictBuffer buffer); + } + + protected final int mContentCount; + protected final int mBlockSize; + protected final File mBaseDir; + protected final File mLookupTableFile; + protected final File[] mAddressTableFiles; + protected final File[] mContentFiles; + protected DictBuffer mLookupTableBuffer; + protected final DictBuffer[] mAddressTableBuffers; + private final DictBuffer[] mContentBuffers; + protected final DictionaryBufferFactory mFactory; + + /** + * Sole constructor of SparseTableContentReader. + * + * @param name the name of SparseTable. + * @param blockSize the block size of the content table. + * @param baseDir the directory which contains the files of the content table. + * @param contentFilenames the file names of content files. + * @param contentIds the ids of contents. These ids are used for a suffix of a name of + * address files and content files. + * @param factory the DictionaryBufferFactory which is used for opening the files. + */ + public SparseTableContentReader(final String name, final int blockSize, final File baseDir, + final String[] contentFilenames, final String[] contentIds, + final DictionaryBufferFactory factory) { + if (contentFilenames.length != contentIds.length) { + throw new RuntimeException("The length of contentFilenames and the length of" + + " contentIds are different " + contentFilenames.length + ", " + + contentIds.length); + } + mBlockSize = blockSize; + mBaseDir = baseDir; + mFactory = factory; + mContentCount = contentFilenames.length; + mLookupTableFile = new File(baseDir, name + FormatSpec.LOOKUP_TABLE_FILE_SUFFIX); + mAddressTableFiles = new File[mContentCount]; + mContentFiles = new File[mContentCount]; + for (int i = 0; i < mContentCount; ++i) { + mAddressTableFiles[i] = new File(mBaseDir, + name + FormatSpec.CONTENT_TABLE_FILE_SUFFIX + contentIds[i]); + mContentFiles[i] = new File(mBaseDir, contentFilenames[i] + contentIds[i]); + } + mAddressTableBuffers = new DictBuffer[mContentCount]; + mContentBuffers = new DictBuffer[mContentCount]; + } + + public void openBuffers() throws FileNotFoundException, IOException { + mLookupTableBuffer = mFactory.getDictionaryBuffer(mLookupTableFile); + for (int i = 0; i < mContentCount; ++i) { + mAddressTableBuffers[i] = mFactory.getDictionaryBuffer(mAddressTableFiles[i]); + mContentBuffers[i] = mFactory.getDictionaryBuffer(mContentFiles[i]); + } + } + + protected void read(final int contentIndex, final int index, + final SparseTableContentReaderInterface reader) { + if (index < 0 || (index / mBlockSize) * SparseTable.SIZE_OF_INT_IN_BYTES + >= mLookupTableBuffer.limit()) { + return; + } + + mLookupTableBuffer.position((index / mBlockSize) * SparseTable.SIZE_OF_INT_IN_BYTES); + final int posInAddressTable = mLookupTableBuffer.readInt(); + if (posInAddressTable == SparseTable.NOT_EXIST) { + return; + } + + mAddressTableBuffers[contentIndex].position( + (posInAddressTable + index % mBlockSize) * SparseTable.SIZE_OF_INT_IN_BYTES); + final int address = mAddressTableBuffers[contentIndex].readInt(); + if (address == SparseTable.NOT_EXIST) { + return; + } + + mContentBuffers[contentIndex].position(address); + reader.read(mContentBuffers[contentIndex]); + } +} \ No newline at end of file -- cgit v1.2.3-83-g751a