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stub hierarchy: use less memory when reading from index

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This commit is contained in:
peter
2016-07-05 08:58:07 +02:00
parent c4e031dfcd
commit da07daf5ce
8 changed files with 346 additions and 260 deletions
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java/java-indexing-impl/src/com/intellij/psi/impl/java/stubs/index/JavaUnitDescriptor.java
-168
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@@ -1,168 +0,0 @@
/*
* Copyright 2000-2015 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.
*/
package com.intellij.psi.impl.java.stubs.index;
import com.intellij.psi.impl.java.stubs.hierarchy.IndexTree;
import com.intellij.util.BitUtil;
import com.intellij.util.io.DataExternalizer;
import com.intellij.util.io.DataInputOutputUtil;
import org.jetbrains.annotations.NotNull;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import static com.intellij.psi.impl.java.stubs.index.JavaUnitDescriptor.ImportFlags.*;
public class JavaUnitDescriptor implements DataExternalizer<IndexTree.Unit> {
public static final JavaUnitDescriptor INSTANCE = new JavaUnitDescriptor();
private static void writeIntArray(DataOutput out, int[] array) throws IOException {
DataInputOutputUtil.writeINT(out, array.length);
for (int i : array) {
out.writeInt(i);
}
}
private static int[] readIntArray(DataInput in) throws IOException {
int length = DataInputOutputUtil.readINT(in);
int[] result = new int[length];
for (int i = 0; i < length; i++) {
result[i] = in.readInt();
}
return result;
}
@Override
public void save(@NotNull DataOutput out, IndexTree.Unit value) throws IOException {
writeIntArray(out, value.myPackageName);
out.writeByte(value.myUnitType);
if (value.myUnitType != IndexTree.BYTECODE) {
DataInputOutputUtil.writeINT(out, value.imports.length);
for (IndexTree.Import anImport : value.imports) {
writeImport(out, anImport);
}
}
// class Declaration
DataInputOutputUtil.writeINT(out, value.myDecls.length);
for (IndexTree.ClassDecl def : value.myDecls) {
saveClassDecl(out, def);
}
}
private void saveClassDecl(@NotNull DataOutput out, IndexTree.ClassDecl value) throws IOException {
DataInputOutputUtil.writeINT(out, value.myStubId);
DataInputOutputUtil.writeINT(out, value.myMods);
out.writeInt(value.myName);
DataInputOutputUtil.writeINT(out, value.mySupers.length);
for (int[] aSuper : value.mySupers) {
writeIntArray(out, aSuper);
}
DataInputOutputUtil.writeINT(out, value.myDecls.length);
for (IndexTree.Decl def : value.myDecls) {
saveDecl(out, def);
}
}
private void saveDecl(@NotNull DataOutput out, IndexTree.Decl value) throws IOException {
if (value instanceof IndexTree.ClassDecl) {
out.writeBoolean(true);
saveClassDecl(out, (IndexTree.ClassDecl)value);
} else if (value instanceof IndexTree.MemberDecl) {
out.writeBoolean(false);
IndexTree.MemberDecl memberDecl = (IndexTree.MemberDecl)value;
DataInputOutputUtil.writeINT(out, memberDecl.myDecls.length);
for (IndexTree.Decl def : memberDecl.myDecls) {
saveDecl(out, def);
}
}
}
@Override
public IndexTree.Unit read(@NotNull DataInput in) throws IOException {
int[] pid = readIntArray(in);
byte type = in.readByte();
IndexTree.Import[] imports = IndexTree.Import.EMPTY_ARRAY;
if (type != IndexTree.BYTECODE) {
imports = new IndexTree.Import[DataInputOutputUtil.readINT(in)];
for (int i = 0; i < imports.length; i++) {
imports[i] = readImport(in);
}
}
IndexTree.ClassDecl[] classes = new IndexTree.ClassDecl[DataInputOutputUtil.readINT(in)];
for (int i = 0; i < classes.length; i++) {
classes[i] = readClassDecl(in);
}
return new IndexTree.Unit(pid, type, imports, classes);
}
private IndexTree.ClassDecl readClassDecl(DataInput in) throws IOException {
int stubId = DataInputOutputUtil.readINT(in);
int mods = DataInputOutputUtil.readINT(in);
int name = in.readInt();
int[][] supers = new int[DataInputOutputUtil.readINT(in)][];
for (int i = 0; i < supers.length; i++) {
supers[i] = readIntArray(in);
}
IndexTree.Decl[] decls = new IndexTree.Decl[DataInputOutputUtil.readINT(in)];
for (int i = 0; i < decls.length; i++) {
decls[i] = readDecl(in);
}
return new IndexTree.ClassDecl(stubId, mods, name, supers, decls);
}
private IndexTree.Decl readDecl(DataInput in) throws IOException {
boolean isClassDecl = in.readBoolean();
if (isClassDecl) {
return readClassDecl(in);
}
else {
IndexTree.Decl[] decls = new IndexTree.Decl[DataInputOutputUtil.readINT(in)];
for (int i = 0; i < decls.length; i++) {
decls[i] = readDecl(in);
}
return new IndexTree.MemberDecl(decls);
}
}
interface ImportFlags {
int IS_STATIC = 1;
int IS_ON_DEMAND = 2;
int HAS_ALIAS = 4;
}
private static void writeImport(@NotNull DataOutput out, IndexTree.Import anImport) throws IOException {
writeIntArray(out, anImport.myFullname);
boolean hasAlias = anImport.myAlias != 0;
int flags = 0;
flags = BitUtil.set(flags, IS_STATIC, anImport.myStaticImport);
flags = BitUtil.set(flags, IS_ON_DEMAND, anImport.myOnDemand);
flags = BitUtil.set(flags, HAS_ALIAS, hasAlias);
out.writeByte(flags);
if (hasAlias) {
out.writeInt(anImport.myAlias);
}
}
@NotNull
private static IndexTree.Import readImport(@NotNull DataInput in) throws IOException {
int[] fullname = readIntArray(in);
int flags = in.readByte();
return new IndexTree.Import(fullname,
BitUtil.isSet(flags, IS_STATIC), BitUtil.isSet(flags, IS_ON_DEMAND),
BitUtil.isSet(flags, HAS_ALIAS) ? in.readInt() : 0);
}
}