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/*
* Copyright 2000-2014 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 org.jetbrains.java.decompiler;
import com.intellij.ide.highlighter.JavaFileType;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.fileTypes.StdFileTypes;
import com.intellij.openapi.project.DefaultProjectFactory;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.Ref;
import com.intellij.openapi.util.io.FileUtil;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.psi.codeStyle.CodeStyleSettings;
import com.intellij.psi.codeStyle.CodeStyleSettingsManager;
import com.intellij.psi.codeStyle.CommonCodeStyleSettings;
import com.intellij.psi.compiled.ClassFileDecompilers;
import com.intellij.psi.impl.compiled.ClsFileImpl;
import com.intellij.util.containers.ContainerUtil;
import de.fernflower.main.decompiler.IdeDecompiler;
import de.fernflower.main.extern.IBytecodeProvider;
import de.fernflower.main.extern.IDecompilatSaver;
import de.fernflower.main.extern.IFernflowerLogger;
import de.fernflower.main.extern.IFernflowerPreferences;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.org.objectweb.asm.ClassReader;
import org.jetbrains.org.objectweb.asm.ClassVisitor;
import org.jetbrains.org.objectweb.asm.Opcodes;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.jar.Manifest;
public class IdeaDecompiler extends ClassFileDecompilers.Light {
private static final Logger LOG = Logger.getInstance(IdeaDecompiler.class);
private static final String BANNER =
"//\n" +
"// Source code recreated from a .class file by IntelliJ IDEA\n" +
"// (powered by Fernflower decompiler)\n" +
"//\n\n";
private final IFernflowerLogger myLogger = new IdeaLogger();
private final HashMap<String, Object> myOptions = new HashMap<String, Object>();
public IdeaDecompiler() {
myOptions.put(IFernflowerPreferences.HIDE_DEFAULT_CONSTRUCTOR, "0");
myOptions.put(IFernflowerPreferences.DECOMPILE_GENERIC_SIGNATURES, "1");
myOptions.put(IFernflowerPreferences.REMOVE_SYNTHETIC, "1");
myOptions.put(IFernflowerPreferences.REMOVE_BRIDGE, "1");
myOptions.put(IFernflowerPreferences.LITERALS_AS_IS, "1");
myOptions.put(IFernflowerPreferences.NEW_LINE_SEPARATOR, "1");
Project project = DefaultProjectFactory.getInstance().getDefaultProject();
CodeStyleSettings settings = CodeStyleSettingsManager.getInstance(project).getCurrentSettings();
CommonCodeStyleSettings.IndentOptions options = settings.getIndentOptions(JavaFileType.INSTANCE);
myOptions.put(IFernflowerPreferences.INDENT_STRING, StringUtil.repeat(" ", options.INDENT_SIZE));
}
@Override
public boolean accepts(@NotNull VirtualFile file) {
return true;
}
@NotNull
@Override
public CharSequence getText(@NotNull VirtualFile file) {
if (!canHandle(file)) {
return ClsFileImpl.decompile(file);
}
try {
Map<String, VirtualFile> files = ContainerUtil.newLinkedHashMap();
files.put(file.getPath(), file);
String mask = file.getNameWithoutExtension() + "$";
for (VirtualFile child : file.getParent().getChildren()) {
if (child.getNameWithoutExtension().startsWith(mask) && file.getFileType() == StdFileTypes.CLASS) {
files.put(child.getPath(), child);
}
}
MyByteCodeProvider provider = new MyByteCodeProvider(files);
MyResultSaver saver = new MyResultSaver();
IdeDecompiler decompiler = new IdeDecompiler(provider, saver, myLogger, myOptions);
for (String path : files.keySet()) {
decompiler.addSpace(new File(path), true);
}
decompiler.decompileContext();
return BANNER + saver.myResult;
}
catch (Exception e) {
LOG.error(file.getUrl(), e);
return ClsFileImpl.decompile(file);
}
}
private static boolean canHandle(VirtualFile file) {
if ("package-info.class".equals(file.getName())) {
LOG.info("skipped: " + file.getUrl());
return false;
}
final Ref<Boolean> isGroovy = Ref.create(false);
try {
new ClassReader(file.contentsToByteArray()).accept(new ClassVisitor(Opcodes.ASM5) {
@Override
public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) {
for (String anInterface : interfaces) {
if ("groovy/lang/GroovyObject".equals(anInterface)) {
isGroovy.set(true);
break;
}
}
}
@Override
public void visitSource(String source, String debug) {
if (source != null && source.endsWith(".groovy")) {
isGroovy.set(true);
}
}
}, ClassReader.SKIP_CODE);
}
catch (Exception e) {
throw new RuntimeException("corrupted file: " + file.getUrl(), e);
}
if (isGroovy.get()) {
LOG.info("skipped Groovy class: " + file.getUrl());
return false;
}
return true;
}
private static class MyByteCodeProvider implements IBytecodeProvider {
private final Map<String, VirtualFile> myFiles;
private MyByteCodeProvider(@NotNull Map<String, VirtualFile> files) {
myFiles = files;
}
@Override
public InputStream getBytecodeStream(String externalPath, String internalPath) {
try {
String path = FileUtil.toSystemIndependentName(externalPath);
VirtualFile file = myFiles.get(path);
assert file != null : path;
return file.getInputStream();
}
catch (IOException e) {
throw new RuntimeException(e);
}
}
}
private static class MyResultSaver implements IDecompilatSaver {
private String myResult = "";
@Override
public void saveClassFile(String path, String qualifiedName, String entryName, String content) {
if (myResult.isEmpty()) {
myResult = content;
}
}
@Override
public void copyFile(String source, String destPath, String destFileName) { }
@Override
public void saveFolder(String path) { }
@Override
public void saveFile(String path, String filename, String content) { }
@Override
public void createArchive(String path, String archiveName, Manifest manifest) { }
@Override
public void saveClassEntry(String path, String archiveName, String qualifiedName, String entryName, String content) { }
@Override
public void saveEntry(String path, String archiveName, String entryName, String content) { }
@Override
public void copyEntry(String source, String destPath, String archiveName, String entry) { }
@Override
public void closeArchive(String path, String archiveName) { }
}
}
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