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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.modules.decompiler.stats;
import org.jetbrains.java.decompiler.code.CodeConstants;
import org.jetbrains.java.decompiler.main.DecompilerContext;
import org.jetbrains.java.decompiler.main.collectors.CounterContainer;
import org.jetbrains.java.decompiler.modules.decompiler.DecHelper;
import org.jetbrains.java.decompiler.modules.decompiler.ExprProcessor;
import org.jetbrains.java.decompiler.modules.decompiler.StatEdge;
import org.jetbrains.java.decompiler.modules.decompiler.exps.VarExprent;
import org.jetbrains.java.decompiler.modules.decompiler.vars.VarProcessor;
import org.jetbrains.java.decompiler.struct.gen.VarType;
import org.jetbrains.java.decompiler.util.InterpreterUtil;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
public class CatchAllStatement extends Statement {
private Statement handler;
private boolean isFinally;
private VarExprent monitor;
private List<VarExprent> vars = new ArrayList<VarExprent>();
// *****************************************************************************
// constructors
// *****************************************************************************
private CatchAllStatement() {
type = Statement.TYPE_CATCHALL;
}
private CatchAllStatement(Statement head, Statement handler) {
this();
first = head;
stats.addWithKey(head, head.id);
this.handler = handler;
stats.addWithKey(handler, handler.id);
List<StatEdge> lstSuccs = head.getSuccessorEdges(STATEDGE_DIRECT_ALL);
if (!lstSuccs.isEmpty()) {
StatEdge edge = lstSuccs.get(0);
if (edge.getType() == StatEdge.TYPE_REGULAR) {
post = edge.getDestination();
}
}
vars.add(new VarExprent(DecompilerContext.getCounterContainer().getCounterAndIncrement(CounterContainer.VAR_COUNTER),
new VarType(CodeConstants.TYPE_OBJECT, 0, "java/lang/Throwable"),
(VarProcessor)DecompilerContext.getProperty(DecompilerContext.CURRENT_VAR_PROCESSOR)));
}
// *****************************************************************************
// public methods
// *****************************************************************************
public static Statement isHead(Statement head) {
if (head.getLastBasicType() != Statement.LASTBASICTYPE_GENERAL) {
return null;
}
HashSet<Statement> setHandlers = DecHelper.getUniquePredExceptions(head);
if (setHandlers.size() != 1) {
return null;
}
for (StatEdge edge : head.getSuccessorEdges(StatEdge.TYPE_EXCEPTION)) {
Statement exc = edge.getDestination();
if (edge.getExceptions() == null && setHandlers.contains(exc) && exc.getLastBasicType() == LASTBASICTYPE_GENERAL) {
List<StatEdge> lstSuccs = exc.getSuccessorEdges(STATEDGE_DIRECT_ALL);
if (lstSuccs.isEmpty() || lstSuccs.get(0).getType() != StatEdge.TYPE_REGULAR) {
if (head.isMonitorEnter() || exc.isMonitorEnter()) {
return null;
}
if (DecHelper.checkStatementExceptions(Arrays.asList(head, exc))) {
return new CatchAllStatement(head, exc);
}
}
}
}
return null;
}
public String toJava(int indent) {
String indstr = InterpreterUtil.getIndentString(indent);
String indstr1 = null;
String new_line_separator = DecompilerContext.getNewLineSeparator();
StringBuilder buf = new StringBuilder();
buf.append(ExprProcessor.listToJava(varDefinitions, indent));
boolean labeled = isLabeled();
if (labeled) {
buf.append(indstr).append("label").append(this.id).append(":").append(new_line_separator);
}
List<StatEdge> lstSuccs = first.getSuccessorEdges(STATEDGE_DIRECT_ALL);
if (first.type == TYPE_TRYCATCH && first.varDefinitions.isEmpty() && isFinally &&
!labeled && !first.isLabeled() && (lstSuccs.isEmpty() || !lstSuccs.get(0).explicit)) {
String content = ExprProcessor.jmpWrapper(first, indent, true);
content = content.substring(0, content.length() - new_line_separator.length());
buf.append(content);
}
else {
buf.append(indstr).append("try {").append(new_line_separator);
buf.append(ExprProcessor.jmpWrapper(first, indent + 1, true));
buf.append(indstr).append("}");
}
buf.append(isFinally ? " finally" :
" catch (" + vars.get(0).toJava(indent) + ")").append(" {").append(new_line_separator);
if (monitor != null) {
indstr1 = InterpreterUtil.getIndentString(indent + 1);
buf.append(indstr1).append("if(").append(monitor.toJava(indent)).append(") {").append(new_line_separator);
}
buf.append(ExprProcessor.jmpWrapper(handler, indent + 1 + (monitor != null ? 1 : 0), true));
if (monitor != null) {
buf.append(indstr1).append("}").append(new_line_separator);
}
buf.append(indstr).append("}").append(new_line_separator);
return buf.toString();
}
public void replaceStatement(Statement oldstat, Statement newstat) {
if (handler == oldstat) {
handler = newstat;
}
super.replaceStatement(oldstat, newstat);
}
public Statement getSimpleCopy() {
CatchAllStatement cas = new CatchAllStatement();
cas.isFinally = this.isFinally;
if (this.monitor != null) {
cas.monitor = new VarExprent(DecompilerContext.getCounterContainer().getCounterAndIncrement(CounterContainer.VAR_COUNTER),
VarType.VARTYPE_INT,
(VarProcessor)DecompilerContext.getProperty(DecompilerContext.CURRENT_VAR_PROCESSOR));
}
if (!this.vars.isEmpty()) {
// FIXME: WTF??? vars?!
vars.add(new VarExprent(DecompilerContext.getCounterContainer().getCounterAndIncrement(CounterContainer.VAR_COUNTER),
new VarType(CodeConstants.TYPE_OBJECT, 0, "java/lang/Throwable"),
(VarProcessor)DecompilerContext.getProperty(DecompilerContext.CURRENT_VAR_PROCESSOR)));
}
return cas;
}
public void initSimpleCopy() {
first = stats.get(0);
handler = stats.get(1);
}
// *****************************************************************************
// getter and setter methods
// *****************************************************************************
public Statement getHandler() {
return handler;
}
public void setHandler(Statement handler) {
this.handler = handler;
}
public boolean isFinally() {
return isFinally;
}
public void setFinally(boolean isFinally) {
this.isFinally = isFinally;
}
public VarExprent getMonitor() {
return monitor;
}
public void setMonitor(VarExprent monitor) {
this.monitor = monitor;
}
public List<VarExprent> getVars() {
return vars;
}
}
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