209 lines
6.0 KiB
Java
209 lines
6.0 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.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.StructField;
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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 AssignmentExprent extends Exprent {
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public static final int CONDITION_NONE = -1;
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private static final String[] OPERATORS = {
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" += ", // FUNCTION_ADD
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" -= ", // FUNCTION_SUB
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" *= ", // FUNCTION_MUL
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" /= ", // FUNCTION_DIV
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" &= ", // FUNCTION_AND
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" |= ", // FUNCTION_OR
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" ^= ", // FUNCTION_XOR
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" %= ", // FUNCTION_REM
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" <<= ", // FUNCTION_SHL
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" >>= ", // FUNCTION_SHR
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" >>>= " // FUNCTION_USHR
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};
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private Exprent left;
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private Exprent right;
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private int condType = CONDITION_NONE;
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public AssignmentExprent(Exprent left, Exprent right, Set<Integer> bytecodeOffsets) {
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super(EXPRENT_ASSIGNMENT);
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this.left = left;
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this.right = right;
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addBytecodeOffsets(bytecodeOffsets);
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}
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@Override
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public VarType getExprType() {
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return left.getExprType();
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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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VarType typeLeft = left.getExprType();
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VarType typeRight = right.getExprType();
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if (typeLeft.typeFamily > typeRight.typeFamily) {
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result.addMinTypeExprent(right, VarType.getMinTypeInFamily(typeLeft.typeFamily));
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}
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else if (typeLeft.typeFamily < typeRight.typeFamily) {
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result.addMinTypeExprent(left, typeRight);
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}
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else {
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result.addMinTypeExprent(left, VarType.getCommonSupertype(typeLeft, typeRight));
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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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lst.add(left);
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lst.add(right);
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return lst;
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}
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@Override
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public Exprent copy() {
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return new AssignmentExprent(left.copy(), right.copy(), bytecode);
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}
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@Override
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public int getPrecedence() {
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return 13;
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}
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@Override
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public TextBuffer toJava(int indent, BytecodeMappingTracer tracer) {
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VarType leftType = left.getExprType();
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VarType rightType = right.getExprType();
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boolean fieldInClassInit = false, hiddenField = false;
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if (left.type == Exprent.EXPRENT_FIELD) { // first assignment to a final field. Field name without "this" in front of it
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FieldExprent field = (FieldExprent)left;
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ClassNode node = ((ClassNode)DecompilerContext.getProperty(DecompilerContext.CURRENT_CLASS_NODE));
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if (node != null) {
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StructField fd = node.classStruct.getField(field.getName(), field.getDescriptor().descriptorString);
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if (fd != null) {
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if (field.isStatic() && fd.hasModifier(CodeConstants.ACC_FINAL)) {
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fieldInClassInit = true;
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}
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if (node.wrapper.getHiddenMembers().contains(InterpreterUtil.makeUniqueKey(fd.getName(), fd.getDescriptor()))) {
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hiddenField = true;
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}
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}
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}
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}
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if (hiddenField) {
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return new TextBuffer();
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}
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TextBuffer buffer = new TextBuffer();
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if (fieldInClassInit) {
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buffer.append(((FieldExprent)left).getName());
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}
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else {
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buffer.append(left.toJava(indent, tracer));
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}
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TextBuffer res = right.toJava(indent, tracer);
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if (condType == CONDITION_NONE &&
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!leftType.isSuperset(rightType) &&
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(rightType.equals(VarType.VARTYPE_OBJECT) || leftType.type != CodeConstants.TYPE_OBJECT)) {
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if (right.getPrecedence() >= FunctionExprent.getPrecedence(FunctionExprent.FUNCTION_CAST)) {
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res.enclose("(", ")");
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}
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res.prepend("(" + ExprProcessor.getCastTypeName(leftType) + ")");
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}
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buffer.append(condType == CONDITION_NONE ? " = " : OPERATORS[condType]).append(res);
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tracer.addMapping(bytecode);
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return buffer;
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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 == left) {
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left = newExpr;
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}
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if (oldExpr == right) {
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right = 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 AssignmentExprent)) return false;
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AssignmentExprent as = (AssignmentExprent)o;
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return InterpreterUtil.equalObjects(left, as.getLeft()) &&
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InterpreterUtil.equalObjects(right, as.getRight()) &&
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condType == as.getCondType();
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}
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// *****************************************************************************
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// getter and setter methods
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// *****************************************************************************
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public Exprent getLeft() {
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return left;
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}
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public void setLeft(Exprent left) {
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this.left = left;
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}
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public Exprent getRight() {
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return right;
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}
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public void setRight(Exprent right) {
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this.right = right;
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}
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public int getCondType() {
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return condType;
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}
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public void setCondType(int condType) {
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this.condType = condType;
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}
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}
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