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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.main;
import org.jetbrains.java.decompiler.code.CodeConstants;
import org.jetbrains.java.decompiler.main.ClassesProcessor.ClassNode;
import org.jetbrains.java.decompiler.main.rels.ClassWrapper;
import org.jetbrains.java.decompiler.main.rels.MethodWrapper;
import org.jetbrains.java.decompiler.modules.decompiler.exps.Exprent;
import org.jetbrains.java.decompiler.modules.decompiler.exps.InvocationExprent;
import org.jetbrains.java.decompiler.modules.decompiler.exps.NewExprent;
import org.jetbrains.java.decompiler.modules.decompiler.exps.VarExprent;
import org.jetbrains.java.decompiler.modules.decompiler.stats.Statement;
import org.jetbrains.java.decompiler.modules.decompiler.vars.VarVersionPaar;
import org.jetbrains.java.decompiler.struct.StructClass;
import org.jetbrains.java.decompiler.struct.StructField;
import org.jetbrains.java.decompiler.struct.StructMethod;
import org.jetbrains.java.decompiler.struct.gen.FieldDescriptor;
import org.jetbrains.java.decompiler.struct.gen.VarType;
import org.jetbrains.java.decompiler.util.InterpreterUtil;
public class EnumProcessor {
public static void clearEnum(ClassWrapper wrapper) {
StructClass cl = wrapper.getClassStruct();
// hide values() and valueOf()
for (StructMethod meth : cl.getMethods()) {
String name = meth.getName();
int flag = 0;
if ("values".equals(name)) {
flag = 1;
}
else if ("valueOf".equals(name)) {
flag = 2;
}
if (flag > 0) {
String[] arr = meth.getDescriptor().split("[()]");
String par = arr[1];
if ((flag == 1 && par.length() == 0) ||
flag == 2 && "Ljava/lang/String;".equals(par)) {
wrapper.getHideMembers().add(InterpreterUtil.makeUniqueKey(name, meth.getDescriptor()));
}
}
}
// hide all super invocations
for (MethodWrapper meth : wrapper.getMethods()) {
if ("<init>".equals(meth.methodStruct.getName())) {
Statement firstdata = findFirstData(meth.root);
if (firstdata == null || firstdata.getExprents().isEmpty()) {
return;
}
Exprent exprent = firstdata.getExprents().get(0);
if (exprent.type == Exprent.EXPRENT_INVOCATION) {
InvocationExprent invexpr = (InvocationExprent)exprent;
if (isInvocationSuperConstructor(invexpr, meth, wrapper)) {
firstdata.getExprents().remove(0);
}
}
}
}
// hide dummy synthetic fields of enum constants
for (StructField fd : cl.getFields()) {
if ((fd.access_flags & CodeConstants.ACC_ENUM) != 0) {
Exprent initializer =
wrapper.getStaticFieldInitializers().getWithKey(InterpreterUtil.makeUniqueKey(fd.getName(), fd.getDescriptor()));
if (initializer != null && initializer.type == Exprent.EXPRENT_NEW) {
NewExprent nexpr = (NewExprent)initializer;
if (nexpr.isAnonymous()) {
ClassNode child = DecompilerContext.getClassProcessor().getMapRootClasses().get(nexpr.getNewtype().value);
hideDummyFieldInConstant(child.wrapper);
}
}
}
}
}
private static void hideDummyFieldInConstant(ClassWrapper wrapper) {
StructClass cl = wrapper.getClassStruct();
for (StructField fd : cl.getFields()) {
if ((fd.access_flags & CodeConstants.ACC_SYNTHETIC) != 0) {
FieldDescriptor descr = FieldDescriptor.parseDescriptor(fd.getDescriptor());
VarType ret = descr.type;
if (ret.type == CodeConstants.TYPE_OBJECT && ret.arraydim == 1 && cl.qualifiedName.equals(ret.value)) {
wrapper.getHideMembers().add(InterpreterUtil.makeUniqueKey(fd.getName(), fd.getDescriptor()));
}
}
}
}
// FIXME: move to a util class (see also InitializerProcessor)
private static Statement findFirstData(Statement stat) {
if (stat.getExprents() != null) {
return stat;
}
else {
if (stat.isLabeled()) {
return null;
}
switch (stat.type) {
case Statement.TYPE_SEQUENCE:
case Statement.TYPE_IF:
case Statement.TYPE_ROOT:
case Statement.TYPE_SWITCH:
case Statement.TYPE_SYNCRONIZED:
return findFirstData(stat.getFirst());
default:
return null;
}
}
}
// FIXME: move to util class (see also InitializerProcessor)
private static boolean isInvocationSuperConstructor(InvocationExprent inv, MethodWrapper meth, ClassWrapper wrapper) {
if (inv.getFunctype() == InvocationExprent.TYP_INIT) {
if (inv.getInstance().type == Exprent.EXPRENT_VAR) {
VarExprent instvar = (VarExprent)inv.getInstance();
VarVersionPaar varpaar = new VarVersionPaar(instvar);
String classname = meth.varproc.getThisvars().get(varpaar);
if (classname != null) { // any this instance. TODO: Restrict to current class?
if (!wrapper.getClassStruct().qualifiedName.equals(inv.getClassname())) {
return true;
}
}
}
}
return false;
}
}
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