+// Copyright 2011 Google Inc. All Rights Reserved.
+//
+// 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.hughes.android.dictionary.engine;
+import java.io.File;
import java.io.IOException;
+import java.io.PrintStream;
import java.io.RandomAccessFile;
import java.util.ArrayList;
import java.util.List;
+import com.hughes.android.dictionary.DictionaryInfo;
+import com.hughes.util.CachingList;
import com.hughes.util.raf.RAFList;
-import com.hughes.util.raf.RAFSerializer;
+import com.hughes.util.raf.RAFListSerializer;
+import com.hughes.util.raf.RAFSerializable;
-public class Dictionary {
+public class Dictionary implements RAFSerializable<Dictionary> {
- // persisted
- final List<PairEntry> pairEntries;
+ static final int CACHE_SIZE = 5000;
- // persisted
- final List<EntrySource> sources;
+ static final int CURRENT_DICT_VERSION = 3;
+ static final String END_OF_DICTIONARY = "END OF DICTIONARY";
// persisted
- final List<Index> indices;
+ final int dictFileVersion;
+ final long creationMillis;
+ public final String dictInfo;
+ public final List<PairEntry> pairEntries;
+ public final List<TextEntry> textEntries;
+ public final List<EntrySource> sources;
+ public final List<Index> indices;
+
+ /**
+ * dictFileVersion 1 adds:
+ * <li> links to sources?
+ *
+ * dictFileVersion 2 adds:
+ * <li> counts of tokens in indices.
+ */
- public Dictionary() {
+ public Dictionary(final String dictInfo) {
+ this.dictFileVersion = CURRENT_DICT_VERSION;
+ this.creationMillis = System.currentTimeMillis();
+ this.dictInfo = dictInfo;
pairEntries = new ArrayList<PairEntry>();
+ textEntries = new ArrayList<TextEntry>();
sources = new ArrayList<EntrySource>();
indices = new ArrayList<Index>();
}
public Dictionary(final RandomAccessFile raf) throws IOException {
- pairEntries = RAFList.create(raf, PairEntry.SERIALIZER, raf.getFilePointer());
- sources = new ArrayList<EntrySource>();
+ dictFileVersion = raf.readInt();
+ if (dictFileVersion < 0 || dictFileVersion > CURRENT_DICT_VERSION) {
+ throw new IOException("Invalid dictionary version: " + dictFileVersion);
+ }
+ creationMillis = raf.readLong();
+ dictInfo = raf.readUTF();
+
+ // Load the sources, then seek past them, because reading them later disrupts the offset.
+ final RAFList<EntrySource> rafSources = RAFList.create(raf, new EntrySource.Serializer(this), raf.getFilePointer());
+ sources = new ArrayList<EntrySource>(rafSources);
+ raf.seek(rafSources.getEndOffset());
+
+ pairEntries = CachingList.create(RAFList.create(raf, new PairEntry.Serializer(this), raf.getFilePointer()), CACHE_SIZE);
+ textEntries = CachingList.create(RAFList.create(raf, new TextEntry.Serializer(this), raf.getFilePointer()), CACHE_SIZE);
+ indices = CachingList.createFullyCached(RAFList.create(raf, indexSerializer, raf.getFilePointer()));
+ final String end = raf.readUTF();
+ if (!end.equals(END_OF_DICTIONARY)) {
+ throw new IOException("Dictionary seems corrupt: " + end);
+ }
+ }
+
+ @Override
+ public void write(RandomAccessFile raf) throws IOException {
+ raf.writeInt(dictFileVersion);
+ raf.writeLong(creationMillis);
+ raf.writeUTF(dictInfo);
+ RAFList.write(raf, sources, new EntrySource.Serializer(this));
+ RAFList.write(raf, pairEntries, new PairEntry.Serializer(this));
+ RAFList.write(raf, textEntries, new TextEntry.Serializer(this));
+ RAFList.write(raf, indices, indexSerializer);
+ raf.writeUTF(END_OF_DICTIONARY);
+ }
- final RAFSerializer<Index> indexSerializer = new RAFSerializer<Index>() {
+ private final RAFListSerializer<Index> indexSerializer = new RAFListSerializer<Index>() {
+ @Override
+ public Index read(RandomAccessFile raf, final int readIndex) throws IOException {
+ return new Index(Dictionary.this, raf);
+ }
+ @Override
+ public void write(RandomAccessFile raf, Index t) throws IOException {
+ t.write(raf);
+ }};
+
+ public void print(final PrintStream out) {
+ out.println("dictInfo=" + dictInfo);
+ for (final EntrySource entrySource : sources) {
+ out.printf("EntrySource: %s %d\n", entrySource.name, entrySource.numEntries);
+ }
+ out.println();
+ for (final Index index : indices) {
+ out.printf("Index: %s %s\n", index.shortName, index.longName);
+ index.print(out);
+ out.println();
+ }
+ }
- @Override
- public Index read(RandomAccessFile raf) throws IOException {
- return new Index(Dictionary.this, raf);
+ public DictionaryInfo getDictionaryInfo() {
+ final DictionaryInfo result = new DictionaryInfo();
+ result.creationMillis = this.creationMillis;
+ result.dictInfo = this.dictInfo;
+ for (final Index index : indices) {
+ result.indexInfos.add(index.getIndexInfo());
}
+ return result;
+ }
+
+ public static DictionaryInfo getDictionaryInfo(final File file) {
+ RandomAccessFile raf = null;
+ try {
+ raf = new RandomAccessFile(file, "r");
+ final Dictionary dict = new Dictionary(raf);
+ final DictionaryInfo dictionaryInfo = dict.getDictionaryInfo();
+ raf.close();
+ return dictionaryInfo;
+ } catch (IOException e) {
+ return null;
+ } finally {
+ if (raf != null) {
+ try {
+ raf.close();
+ } catch (IOException e) {
+ e.printStackTrace();
+ }
+ }
+ }
+ }
- @Override
- public void write(RandomAccessFile raf, Index t) throws IOException {
- t.write(raf);
-
- }};
- indices = RAFList.create(raf, indexSerializer, raf.getFilePointer());
- }
-
}
\ No newline at end of file
projects / Dictionary.git / blobdiff