/*
* Copyright 2008 Google Inc.
*
* 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.google.gwt.dev.javac;
import com.google.gwt.dev.util.DiskCache;
import com.google.gwt.dev.util.Name.InternalName;
import org.eclipse.jdt.core.compiler.CharOperation;
import org.eclipse.jdt.internal.compiler.ClassFile;
import org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileReader;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFormatException;
import org.eclipse.jdt.internal.compiler.env.NameEnvironmentAnswer;
import org.eclipse.jdt.internal.compiler.lookup.LocalTypeBinding;
import org.eclipse.jdt.internal.compiler.lookup.NestedTypeBinding;
import org.eclipse.jdt.internal.compiler.lookup.SourceTypeBinding;
/**
* Encapsulates the state of a single compiled class file.
*/
public final class CompiledClass {
private static final DiskCache diskCache = new DiskCache();
private static ClassFile getClassFile(TypeDeclaration typeDecl,
String binaryName) {
for (ClassFile tryClassFile : typeDecl.compilationResult().getClassFiles()) {
char[] tryBinaryName = CharOperation.concatWith(
tryClassFile.getCompoundName(), '/');
if (binaryName.equals(String.valueOf(tryBinaryName))) {
return tryClassFile;
}
}
assert false;
return null;
}
/**
* Returns <code>true</code> if this is a local type, or if this type is
* nested inside of any local type.
*/
private static boolean isLocalType(SourceTypeBinding binding) {
SourceTypeBinding b = binding;
while (!b.isStatic()) {
if (b instanceof LocalTypeBinding) {
return true;
}
b = ((NestedTypeBinding) b).enclosingType;
}
return false;
}
protected final CompiledClass enclosingClass;
protected final String internalName;
protected final boolean isLocal;
protected CompilationUnit unit;
/**
* A token to retrieve this object's bytes from the disk cache.
*/
private final long cacheToken;
private transient NameEnvironmentAnswer nameEnvironmentAnswer;
CompiledClass(TypeDeclaration typeDeclaration, CompiledClass enclosingClass) {
this.enclosingClass = enclosingClass;
SourceTypeBinding binding = typeDeclaration.binding;
this.internalName = CharOperation.charToString(binding.constantPoolName());
ClassFile classFile = getClassFile(typeDeclaration, internalName);
byte[] bytes = classFile.getBytes();
this.cacheToken = diskCache.writeByteArray(bytes);
this.isLocal = isLocalType(binding);
}
/**
* Returns the bytes of the compiled class.
*/
public byte[] getBytes() {
return diskCache.readByteArray(cacheToken);
}
public CompiledClass getEnclosingClass() {
return enclosingClass;
}
/**
* Returns the binary class name, e.g. {@code java/util/Map$Entry}.
*/
public String getInternalName() {
return internalName;
}
/**
* Returns the enclosing package, e.g. {@code java.util}.
*/
public String getPackageName() {
return Shared.getPackageNameFromBinary(internalName);
}
/**
* Returns the qualified source name, e.g. {@code java.util.Map.Entry}.
*/
public String getSourceName() {
return InternalName.toSourceName(internalName);
}
public CompilationUnit getUnit() {
return unit;
}
/**
* Returns <code>true</code> if this is a local type, or if this type is
* nested inside of any local type.
*/
public boolean isLocal() {
return isLocal;
}
@Override
public String toString() {
return internalName;
}
NameEnvironmentAnswer getNameEnvironmentAnswer() {
if (nameEnvironmentAnswer == null) {
try {
ClassFileReader cfr = new ClassFileReader(getBytes(),
unit.getDisplayLocation().toCharArray(), true);
nameEnvironmentAnswer = new NameEnvironmentAnswer(cfr, null);
} catch (ClassFormatException e) {
throw new RuntimeException("Unexpectedly unable to parse class file", e);
}
}
return nameEnvironmentAnswer;
}
void initUnit(CompilationUnit unit) {
assert this.unit == null;
this.unit = unit;
}
}