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stub hierarchy: serialize hashes instead of names for faster reading, smaller index data and a very unlikely collision probability

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This commit is contained in:
peter
2016-06-24 17:02:24 +02:00
parent 7f70956afe
commit b4a2271239
7 changed files with 149 additions and 149 deletions
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java/java-indexing-impl/src/com/intellij/psi/impl/java/stubs/index/JavaUnitDescriptor.java
+58 -17
View File
@@ -16,6 +16,7 @@
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;
@@ -24,19 +25,34 @@ 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 {
out.writeUTF(value.myPackageId);
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) {
out.writeUTF(anImport.myFullname);
out.writeBoolean(anImport.myStaticImport);
out.writeBoolean(anImport.myOnDemand);
writeImport(out, anImport);
}
}
// class Declaration
@@ -47,12 +63,12 @@ public class JavaUnitDescriptor implements DataExternalizer<IndexTree.Unit> {
}
private void saveClassDecl(@NotNull DataOutput out, IndexTree.ClassDecl value) throws IOException {
out.writeInt(value.myStubId);
DataInputOutputUtil.writeINT(out, value.myStubId);
DataInputOutputUtil.writeINT(out, value.myMods);
out.writeUTF(value.myName == null ? "" : value.myName);
out.writeInt(value.myName);
DataInputOutputUtil.writeINT(out, value.mySupers.length);
for (String aSuper : value.mySupers) {
out.writeUTF(aSuper);
for (int[] aSuper : value.mySupers) {
writeIntArray(out, aSuper);
}
DataInputOutputUtil.writeINT(out, value.myDecls.length);
for (IndexTree.Decl def : value.myDecls) {
@@ -76,13 +92,13 @@ public class JavaUnitDescriptor implements DataExternalizer<IndexTree.Unit> {
@Override
public IndexTree.Unit read(@NotNull DataInput in) throws IOException {
String pid = in.readUTF();
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] = new IndexTree.Import(in.readUTF(), in.readBoolean(), in.readBoolean(), null);
imports[i] = readImport(in);
}
}
IndexTree.ClassDecl[] classes = new IndexTree.ClassDecl[DataInputOutputUtil.readINT(in)];
@@ -93,15 +109,12 @@ public class JavaUnitDescriptor implements DataExternalizer<IndexTree.Unit> {
}
private IndexTree.ClassDecl readClassDecl(DataInput in) throws IOException {
int stubId = in.readInt();
int stubId = DataInputOutputUtil.readINT(in);
int mods = DataInputOutputUtil.readINT(in);
String name = in.readUTF();
if (name.isEmpty()) {
name = null;
}
String[] supers = new String[DataInputOutputUtil.readINT(in)];
int name = in.readInt();
int[][] supers = new int[DataInputOutputUtil.readINT(in)][];
for (int i = 0; i < supers.length; i++) {
supers[i] = in.readUTF();
supers[i] = readIntArray(in);
}
IndexTree.Decl[] decls = new IndexTree.Decl[DataInputOutputUtil.readINT(in)];
for (int i = 0; i < decls.length; i++) {
@@ -124,4 +137,32 @@ public class JavaUnitDescriptor implements DataExternalizer<IndexTree.Unit> {
}
}
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);
}
}