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package com.intellij.tokenindex;
import com.intellij.lang.Language;
import com.intellij.openapi.fileTypes.LanguageFileType;
import com.intellij.openapi.vfs.JarFileSystem;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.structuralsearch.StructuralSearchUtil;
import com.intellij.util.containers.HashMap;
import com.intellij.util.indexing.*;
import com.intellij.util.io.DataExternalizer;
import com.intellij.util.io.KeyDescriptor;
import org.jetbrains.annotations.NotNull;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
/**
* @author Eugene.Kudelevsky
*/
public class TokenIndex extends FileBasedIndexExtension<TokenIndexKey, List<Token>> {
private static final int FILE_BLOCK_SIZE = 100;
public static final ID<TokenIndexKey, List<Token>> INDEX_ID = ID.create("token.index");
private static final int VERSION = 3;
private final KeyDescriptor<TokenIndexKey> myKeyDescriptor = new TokenIndexKeyDescriptor();
private static final int ANONYM_TOKEN_ID = 0;
private static final int TEXT_TOKEN_ID = 1;
private static final int MARKER_TOKEN_ID = 2;
private static final int INDENT_TOKEN_ID = 3;
private final DataExternalizer<List<Token>> myDataExternalizer = new DataExternalizer<List<Token>>() {
@Override
public void save(@NotNull DataOutput out, List<Token> value) throws IOException {
out.writeInt(value.size());
for (Token token : value) {
if (token instanceof AnonymToken) {
out.writeByte(ANONYM_TOKEN_ID);
out.writeInt(token.getStart());
out.writeInt(token.getEnd());
out.writeByte(((AnonymToken)token).getType());
}
else if (token instanceof TextToken) {
out.writeByte(TEXT_TOKEN_ID);
out.writeInt(token.getStart());
out.writeInt(token.getEnd());
out.writeInt(((TextToken)token).getHash());
}
else if (token instanceof PathMarkerToken) {
out.writeByte(MARKER_TOKEN_ID);
out.writeUTF(((PathMarkerToken)token).getPath());
}
else if (token instanceof IndentToken) {
out.writeByte(INDENT_TOKEN_ID);
out.writeInt(token.getStart());
out.writeInt(token.getEnd());
}
else {
assert false : "Unsupported token type " + token.getClass();
}
}
}
@Override
public List<Token> read(@NotNull DataInput in) throws IOException {
List<Token> result = new ArrayList<Token>();
int n = in.readInt();
for (int i = 0; i < n; i++) {
byte tokenTypeId = in.readByte();
switch (tokenTypeId) {
case ANONYM_TOKEN_ID: {
int start = in.readInt();
int end = in.readInt();
byte anonymTokenTypeValue = in.readByte();
result.add(new AnonymToken(anonymTokenTypeValue, start, end));
break;
}
case TEXT_TOKEN_ID: {
int start = in.readInt();
int end = in.readInt();
int hash = in.readInt();
result.add(new TextToken(hash, start, end));
break;
}
case MARKER_TOKEN_ID: {
String path = in.readUTF();
result.add(new PathMarkerToken(path));
break;
}
case INDENT_TOKEN_ID:
int start = in.readInt();
int end = in.readInt();
result.add(new IndentToken(start, end));
break;
}
}
return result;
}
};
@NotNull
@Override
public ID<TokenIndexKey, List<Token>> getName() {
return INDEX_ID;
}
private static int getBlockId(String filePath) {
int h = filePath.hashCode();
if (h < 0) {
h = -h;
}
return h % FILE_BLOCK_SIZE;
}
@NotNull
@Override
public DataIndexer<TokenIndexKey, List<Token>, FileContent> getIndexer() {
return new DataIndexer<TokenIndexKey, List<Token>, FileContent>() {
@Override
@NotNull
public Map<TokenIndexKey, List<Token>> map(@NotNull FileContent inputData) {
if (true) return Collections.EMPTY_MAP; // TODO: Eugene index is VERY unefficient and leads to OME
Map<TokenIndexKey, List<Token>> result = new HashMap<TokenIndexKey, List<Token>>(1);
RecursiveTokenizingVisitor visitor = new RecursiveTokenizingVisitor();
inputData.getPsiFile().accept(visitor);
List<Token> tokens = visitor.getTokens();
if (tokens.size() > 0) {
String path = inputData.getFile().getPath();
tokens.add(new PathMarkerToken(path));
TokenIndexKey key = new TokenIndexKey(visitor.getLanguages(), getBlockId(path));
result.put(key, tokens);
}
return result;
}
};
}
@NotNull
@Override
public KeyDescriptor<TokenIndexKey> getKeyDescriptor() {
return myKeyDescriptor;
}
@NotNull
@Override
public DataExternalizer<List<Token>> getValueExternalizer() {
return myDataExternalizer;
}
@NotNull
@Override
public FileBasedIndex.InputFilter getInputFilter() {
return new FileBasedIndex.InputFilter() {
@Override
public boolean acceptInput(@NotNull VirtualFile file) {
if (file.getFileSystem() instanceof JarFileSystem) return false;
return file.getFileType() instanceof LanguageFileType;
}
};
}
@Override
public boolean dependsOnFileContent() {
return true;
}
@Override
public int getVersion() {
return VERSION;
}
@Override
public int getCacheSize() {
return 1;
}
public static boolean supports(Language language) {
return StructuralSearchUtil.getTokenizerForLanguage(language) != null;
}
}
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