155 lines
4.8 KiB
Java
155 lines
4.8 KiB
Java
/*
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* Copyright 2000-2014 JetBrains s.r.o.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jetbrains.java.decompiler.modules.decompiler.exps;
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import org.jetbrains.java.decompiler.code.CodeConstants;
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import org.jetbrains.java.decompiler.main.ClassesProcessor.ClassNode;
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import org.jetbrains.java.decompiler.main.DecompilerContext;
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import org.jetbrains.java.decompiler.main.TextBuffer;
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import org.jetbrains.java.decompiler.main.collectors.BytecodeMappingTracer;
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import org.jetbrains.java.decompiler.main.rels.MethodWrapper;
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import org.jetbrains.java.decompiler.modules.decompiler.ExprProcessor;
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import org.jetbrains.java.decompiler.modules.decompiler.vars.CheckTypesResult;
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import org.jetbrains.java.decompiler.struct.attr.StructExceptionsAttribute;
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import org.jetbrains.java.decompiler.struct.gen.VarType;
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import org.jetbrains.java.decompiler.util.InterpreterUtil;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Set;
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public class ExitExprent extends Exprent {
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public static final int EXIT_RETURN = 0;
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public static final int EXIT_THROW = 1;
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private final int exitType;
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private Exprent value;
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private final VarType retType;
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public ExitExprent(int exitType, Exprent value, VarType retType, Set<Integer> bytecodeOffsets) {
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super(EXPRENT_EXIT);
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this.exitType = exitType;
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this.value = value;
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this.retType = retType;
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addBytecodeOffsets(bytecodeOffsets);
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}
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@Override
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public Exprent copy() {
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return new ExitExprent(exitType, value == null ? null : value.copy(), retType, bytecode);
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}
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@Override
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public CheckTypesResult checkExprTypeBounds() {
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CheckTypesResult result = new CheckTypesResult();
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if (exitType == EXIT_RETURN && retType.type != CodeConstants.TYPE_VOID) {
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result.addMinTypeExprent(value, VarType.getMinTypeInFamily(retType.typeFamily));
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result.addMaxTypeExprent(value, retType);
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}
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return result;
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}
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@Override
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public List<Exprent> getAllExprents() {
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List<Exprent> lst = new ArrayList<Exprent>();
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if (value != null) {
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lst.add(value);
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}
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return lst;
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}
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@Override
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public TextBuffer toJava(int indent, BytecodeMappingTracer tracer) {
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tracer.addMapping(bytecode);
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if (exitType == EXIT_RETURN) {
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TextBuffer buffer = new TextBuffer();
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if (retType.type != CodeConstants.TYPE_VOID) {
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buffer.append(" ");
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ExprProcessor.getCastedExprent(value, retType, buffer, indent, false, tracer);
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}
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return buffer.prepend("return");
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}
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else {
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MethodWrapper method = (MethodWrapper)DecompilerContext.getProperty(DecompilerContext.CURRENT_METHOD_WRAPPER);
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ClassNode node = ((ClassNode)DecompilerContext.getProperty(DecompilerContext.CURRENT_CLASS_NODE));
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if (method != null && node != null) {
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StructExceptionsAttribute attr = (StructExceptionsAttribute)method.methodStruct.getAttributes().getWithKey("Exceptions");
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if (attr != null) {
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String classname = null;
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for (int i = 0; i < attr.getThrowsExceptions().size(); i++) {
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String exClassName = attr.getExcClassname(i, node.classStruct.getPool());
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if ("java/lang/Throwable".equals(exClassName)) {
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classname = exClassName;
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break;
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}
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else if ("java/lang/Exception".equals(exClassName)) {
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classname = exClassName;
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}
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}
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if (classname != null) {
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VarType exType = new VarType(classname, true);
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TextBuffer buffer = new TextBuffer();
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ExprProcessor.getCastedExprent(value, exType, buffer, indent, false, tracer);
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return buffer.prepend("throw ");
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}
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}
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}
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return value.toJava(indent, tracer).prepend("throw ");
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}
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}
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@Override
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public void replaceExprent(Exprent oldExpr, Exprent newExpr) {
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if (oldExpr == value) {
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value = newExpr;
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}
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}
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@Override
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public boolean equals(Object o) {
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if (o == this) return true;
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if (o == null || !(o instanceof ExitExprent)) return false;
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ExitExprent et = (ExitExprent)o;
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return exitType == et.getExitType() &&
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InterpreterUtil.equalObjects(value, et.getValue());
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}
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public int getExitType() {
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return exitType;
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}
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public Exprent getValue() {
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return value;
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}
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public VarType getRetType() {
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return retType;
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}
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}
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