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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.main.DecompilerContext;
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.util.InterpreterUtil;
import java.util.Arrays;
import java.util.List;
public class SequenceStatement extends Statement {
// *****************************************************************************
// constructors
// *****************************************************************************
private SequenceStatement() {
type = Statement.TYPE_SEQUENCE;
}
public SequenceStatement(List<Statement> lst) {
this();
lastBasicType = lst.get(lst.size() - 1).getLastBasicType();
for (Statement st : lst) {
stats.addWithKey(st, st.id);
}
first = stats.get(0);
}
private SequenceStatement(Statement head, Statement tail) {
this(Arrays.asList(head, tail));
List<StatEdge> lstSuccs = tail.getSuccessorEdges(STATEDGE_DIRECT_ALL);
if (!lstSuccs.isEmpty()) {
StatEdge edge = lstSuccs.get(0);
if (edge.getType() == StatEdge.TYPE_REGULAR && edge.getDestination() != head) {
post = edge.getDestination();
}
}
}
// *****************************************************************************
// public methods
// *****************************************************************************
public static Statement isHead2Block(Statement head) {
if (head.getLastBasicType() != Statement.LASTBASICTYPE_GENERAL) {
return null;
}
// at most one outgoing edge
StatEdge edge = null;
List<StatEdge> lstSuccs = head.getSuccessorEdges(STATEDGE_DIRECT_ALL);
if (!lstSuccs.isEmpty()) {
edge = lstSuccs.get(0);
}
if (edge != null && edge.getType() == StatEdge.TYPE_REGULAR) {
Statement stat = edge.getDestination();
if (stat != head && stat.getPredecessorEdges(StatEdge.TYPE_REGULAR).size() == 1
&& !stat.isMonitorEnter()) {
if (stat.getLastBasicType() == Statement.LASTBASICTYPE_GENERAL) {
if (DecHelper.checkStatementExceptions(Arrays.asList(head, stat))) {
return new SequenceStatement(head, stat);
}
}
}
}
return null;
}
public String toJava(int indent) {
StringBuilder buf = new StringBuilder();
String indstr = null;
boolean islabeled = isLabeled();
String new_line_separator = DecompilerContext.getNewLineSeparator();
buf.append(ExprProcessor.listToJava(varDefinitions, indent));
if (islabeled) {
indstr = InterpreterUtil.getIndentString(indent);
indent++;
buf.append(indstr).append("label").append(this.id).append(": {").append(new_line_separator);
}
boolean notempty = false;
for (int i = 0; i < stats.size(); i++) {
Statement st = stats.get(i);
if (i > 0 && notempty) {
buf.append(new_line_separator);
}
String str = ExprProcessor.jmpWrapper(st, indent, false);
buf.append(str);
notempty = (str.trim().length() > 0);
}
if (islabeled) {
buf.append(indstr).append("}").append(new_line_separator);
}
return buf.toString();
}
public Statement getSimpleCopy() {
return new SequenceStatement();
}
}
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