| /* |
| * Copyright 2000-2014 JetBrains s.r.o. |
| * |
| * 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. |
| */ |
| |
| /* |
| * @author max |
| */ |
| package com.intellij.find.ngrams; |
| |
| import com.intellij.openapi.fileTypes.FileType; |
| import com.intellij.openapi.util.ThreadLocalCachedIntArray; |
| import com.intellij.openapi.util.text.TrigramBuilder; |
| import com.intellij.openapi.vfs.VirtualFile; |
| import com.intellij.psi.impl.cache.impl.id.IdIndex; |
| import com.intellij.util.SystemProperties; |
| import com.intellij.util.indexing.*; |
| import com.intellij.util.io.DataExternalizer; |
| import com.intellij.util.io.DataInputOutputUtil; |
| import com.intellij.util.io.EnumeratorIntegerDescriptor; |
| import com.intellij.util.io.KeyDescriptor; |
| import gnu.trove.THashMap; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Map; |
| |
| public class TrigramIndex extends ScalarIndexExtension<Integer> implements CustomInputsIndexFileBasedIndexExtension<Integer> { |
| public static final boolean ENABLED = SystemProperties.getBooleanProperty("idea.internal.trigramindex.enabled", true); |
| |
| public static final ID<Integer,Void> INDEX_ID = ID.create("Trigram.Index"); |
| |
| private static final FileBasedIndex.InputFilter INPUT_FILTER = new FileBasedIndex.InputFilter() { |
| @Override |
| public boolean acceptInput(@NotNull VirtualFile file) { |
| return isIndexable(file.getFileType()); |
| } |
| }; |
| |
| public static boolean isIndexable(FileType fileType) { |
| return ENABLED && !fileType.isBinary(); |
| } |
| |
| @NotNull |
| @Override |
| public ID<Integer, Void> getName() { |
| return INDEX_ID; |
| } |
| |
| @NotNull |
| @Override |
| public DataIndexer<Integer, Void, FileContent> getIndexer() { |
| return new DataIndexer<Integer, Void, FileContent>() { |
| @Override |
| @NotNull |
| public Map<Integer, Void> map(@NotNull FileContent inputData) { |
| MyTrigramProcessor trigramProcessor = new MyTrigramProcessor(); |
| TrigramBuilder.processTrigrams(inputData.getContentAsText(), trigramProcessor); |
| |
| return trigramProcessor.map; |
| } |
| }; |
| } |
| |
| @NotNull |
| @Override |
| public KeyDescriptor<Integer> getKeyDescriptor() { |
| return EnumeratorIntegerDescriptor.INSTANCE; |
| } |
| |
| @NotNull |
| @Override |
| public FileBasedIndex.InputFilter getInputFilter() { |
| return INPUT_FILTER; |
| } |
| |
| @Override |
| public boolean dependsOnFileContent() { |
| return true; |
| } |
| |
| @Override |
| public int getVersion() { |
| return ENABLED ? 3 + (IdIndex.ourSnapshotMappingsEnabled ? 0xFF:0) : 1; |
| } |
| |
| @Override |
| public boolean hasSnapshotMapping() { |
| return true; |
| } |
| private static final ThreadLocalCachedIntArray spareBufferLocal = new ThreadLocalCachedIntArray(); |
| |
| @NotNull |
| @Override |
| public DataExternalizer<Collection<Integer>> createExternalizer() { |
| return new DataExternalizer<Collection<Integer>>() { |
| @Override |
| public void save(@NotNull DataOutput out, @NotNull Collection<Integer> value) throws IOException { |
| final int numberOfValues = value.size(); |
| |
| int[] buffer = spareBufferLocal.getBuffer(numberOfValues); |
| int ptr = 0; |
| for(Integer i:value) { |
| buffer[ptr++] = i; |
| } |
| Arrays.sort(buffer,0, numberOfValues); |
| |
| DataInputOutputUtil.writeINT(out, numberOfValues); |
| int prev = 0; |
| for(ptr=0; ptr< numberOfValues; ++ptr) { |
| DataInputOutputUtil.writeLONG(out, (long)buffer[ptr] - prev); |
| prev = buffer[ptr]; |
| } |
| } |
| |
| @NotNull |
| @Override |
| public Collection<Integer> read(@NotNull DataInput in) throws IOException { |
| int size = DataInputOutputUtil.readINT(in); |
| ArrayList<Integer> result = new ArrayList<Integer>(size); |
| int prev = 0; |
| while(size -- > 0) { |
| int l = (int)(DataInputOutputUtil.readLONG(in) + prev); |
| result.add(l); |
| prev = l; |
| } |
| return result; |
| } |
| }; |
| } |
| |
| private static class MyTrigramProcessor extends TrigramBuilder.TrigramProcessor { |
| Map<Integer, Void> map; |
| @Override |
| public boolean consumeTrigramsCount(int count) { |
| map = new THashMap<Integer, Void>(count); |
| return true; |
| } |
| |
| @Override |
| public boolean execute(int value) { |
| map.put(value, null); |
| return true; |
| } |
| } |
| } |