/*
* Copyright 2000-2016 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.stubsHierarchy.impl;
import com.intellij.psi.impl.java.stubs.hierarchy.IndexTree;
import com.intellij.psi.stubsHierarchy.impl.Symbol.ClassSymbol;
import com.intellij.psi.stubsHierarchy.impl.Symbol.MemberSymbol;
import com.intellij.psi.stubsHierarchy.impl.Symbol.PackageSymbol;
import com.intellij.util.containers.ContainerUtil;
import com.intellij.util.io.DataInputOutputUtil;
import com.intellij.util.io.DataOutputStream;
import com.intellij.util.io.UnsyncByteArrayInputStream;
import com.intellij.util.io.UnsyncByteArrayOutputStream;
import org.jetbrains.annotations.NotNull;
import java.io.*;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* @author peter
*/
class SerializedUnit {
private final byte[] myBytes;
SerializedUnit(byte[] bytes) {
myBytes = bytes;
}
SerializedUnit(IndexTree.Unit unit) {
try {
//noinspection IOResourceOpenedButNotSafelyClosed
UnsyncByteArrayOutputStream stream = new UnsyncByteArrayOutputStream();
writeUnit(new DataOutputStream(stream), unit);
myBytes = stream.toByteArray();
}
catch (IOException impossible) {
throw new RuntimeException(impossible);
}
}
byte[] getSerializedBytes() {
return myBytes;
}
void readUnit(StubEnter stubEnter, int fileId) {
try {
enterUnit(new UnitInputStream(new UnsyncByteArrayInputStream(myBytes), fileId, stubEnter));
}
catch (IOException impossible) {
throw new RuntimeException(impossible);
}
}
private static void writeNameComponents(DataOutput out, String qName) throws IOException {
int[] array = NameEnvironment.hashQualifiedName(qName);
DataInputOutputUtil.writeINT(out, array.length);
for (int i : array) {
out.writeInt(i);
}
}
static QualifiedName readNameComponents(DataInput in) throws IOException {
int length = DataInputOutputUtil.readINT(in);
if (length == 1) return new QualifiedName.OfSingleComponent(in.readInt());
int[] result = new int[length];
for (int i = 0; i < length; i++) {
result[i] = in.readInt();
}
return new QualifiedName.OfComponents(result);
}
// unit
private static void writeUnit(@NotNull DataOutput out, IndexTree.Unit value) throws IOException {
writeNameComponents(out, value.myPackageName);
out.writeByte(value.myUnitType);
boolean compiled = value.myUnitType == IndexTree.BYTECODE;
if (!compiled) {
Imports.writeImports(out, value);
}
// class Declaration
DataInputOutputUtil.writeINT(out, value.myDecls.length);
for (IndexTree.ClassDecl def : value.myDecls) {
saveClassDecl(out, def, compiled);
}
}
private static void enterUnit(UnitInputStream in) throws IOException {
PackageSymbol pkg = in.stubEnter.readPackageName(in);
byte type = in.readByte();
Import[] imports = type == IndexTree.BYTECODE ? Imports.EMPTY_ARRAY : in.stubEnter.imports.readImports(in);
UnitInfo unitInfo = UnitInfo.mkUnitInfo(type, imports);
int classCount = DataInputOutputUtil.readINT(in);
for (int i = 0; i < classCount; i++) {
readClassDecl(in, unitInfo, pkg, pkg.myQualifiedName);
}
}
// class
private static void saveClassDecl(@NotNull DataOutput out, IndexTree.ClassDecl value, boolean compiled) throws IOException {
DataInputOutputUtil.writeINT(out, value.myStubId);
DataInputOutputUtil.writeINT(out, value.myMods);
out.writeInt(NameEnvironment.hashIdentifier(value.myName));
writeSupers(out, value, compiled);
writeMembers(out, value.myDecls, compiled);
}
private static ClassSymbol readClassDecl(UnitInputStream in, UnitInfo info, Symbol owner, @QNameHash int ownerName) throws IOException {
int stubId = DataInputOutputUtil.readINT(in);
int mods = DataInputOutputUtil.readINT(in);
@ShortName int name = in.readInt();
@CompactArray(QualifiedName.class) Object superNames = readSupers(in, info.isCompiled());
@QNameHash int qname = NameEnvironment.memberQualifiedName(ownerName, name);
ClassSymbol symbol = in.stubEnter.classEnter(info, owner, stubId, mods, name, superNames, qname, in.fileId);
readMembers(in, info, qname, symbol);
return symbol;
}
// supers
private static void writeSupers(@NotNull DataOutput out, IndexTree.ClassDecl value, boolean interned) throws IOException {
DataInputOutputUtil.writeINT(out, value.mySupers.length);
for (String aSuper : value.mySupers) {
writeSuperName(out, interned, aSuper);
}
}
private static @CompactArray(QualifiedName.class) Object readSupers(UnitInputStream in, boolean intern) throws IOException {
int length = DataInputOutputUtil.readINT(in);
if (length == 0) return null;
if (length == 1) return readSuperName(in, intern);
QualifiedName[] superNames = new QualifiedName[length];
for (int i = 0; i < superNames.length; i++) {
superNames[i] = readSuperName(in, intern);
}
return superNames;
}
private static void writeSuperName(@NotNull DataOutput out, boolean interned, String aSuper) throws IOException {
if (interned) {
out.writeInt(NameEnvironment.fromString(aSuper));
} else {
writeNameComponents(out, aSuper);
}
}
private static QualifiedName readSuperName(UnitInputStream in, boolean intern) throws IOException {
return intern ? new QualifiedName.Interned(in.readInt()) : readNameComponents(in);
}
// members
private static void writeMembers(@NotNull DataOutput out, IndexTree.Decl[] decls, boolean compiled) throws IOException {
DataInputOutputUtil.writeINT(out, decls.length);
for (IndexTree.Decl def : decls) {
saveDecl(out, def, compiled);
}
}
private static void readMembers(UnitInputStream in,
UnitInfo info,
@QNameHash int ownerName,
MemberSymbol symbol) throws IOException {
int memberCount = DataInputOutputUtil.readINT(in);
if (memberCount == 0) return;
List<ClassSymbol> members = new ArrayList<>();
for (int i = 0; i < memberCount; i++) {
ContainerUtil.addIfNotNull(members, readDecl(in, info, symbol, ownerName));
}
symbol.setMembers(members);
}
// decl: class or member
private static void saveDecl(@NotNull DataOutput out, IndexTree.Decl value, boolean compiled) throws IOException {
if (value instanceof IndexTree.ClassDecl) {
out.writeBoolean(true);
saveClassDecl(out, (IndexTree.ClassDecl)value, compiled);
} else if (value instanceof IndexTree.MemberDecl) {
out.writeBoolean(false);
writeMembers(out, ((IndexTree.MemberDecl)value).myDecls, compiled);
}
}
private static ClassSymbol readDecl(UnitInputStream in, UnitInfo info, Symbol owner, @QNameHash int ownerName) throws IOException {
if (in.readBoolean()) {
return readClassDecl(in, info, owner, ownerName);
}
readMembers(in, info, ownerName, new MemberSymbol(owner));
return null;
}
@Override
public boolean equals(Object o) {
return this == o || o instanceof SerializedUnit && Arrays.equals(myBytes, ((SerializedUnit)o).myBytes);
}
@Override
public int hashCode() {
int result = myBytes.length;
int length = Math.min(30, myBytes.length);
for (int i = 0; i < length; i++) {
result = 31 * result + myBytes[i];
}
return result;
}
}
class UnitInputStream extends DataInputStream {
final int fileId;
final StubEnter stubEnter;
UnitInputStream(InputStream in, int fileId, StubEnter stubEnter) {
super(in);
this.fileId = fileId;
this.stubEnter = stubEnter;
}
}