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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.exps;
import org.jetbrains.java.decompiler.code.CodeConstants;
import org.jetbrains.java.decompiler.main.ClassesProcessor.ClassNode;
import org.jetbrains.java.decompiler.main.DecompilerContext;
import org.jetbrains.java.decompiler.modules.decompiler.ExprProcessor;
import org.jetbrains.java.decompiler.modules.decompiler.vars.CheckTypesResult;
import org.jetbrains.java.decompiler.struct.StructField;
import org.jetbrains.java.decompiler.struct.gen.VarType;
import org.jetbrains.java.decompiler.util.InterpreterUtil;
import java.util.ArrayList;
import java.util.List;
public class AssignmentExprent extends Exprent {
public static final int CONDITION_NONE = -1;
private static final String[] funceq = new String[]{
" += ", // FUNCTION_ADD
" -= ", // FUNCTION_SUB
" *= ", // FUNCTION_MUL
" /= ", // FUNCTION_DIV
" &= ", // FUNCTION_AND
" |= ", // FUNCTION_OR
" ^= ", // FUNCTION_XOR
" %= ", // FUNCTION_REM
" <<= ", // FUNCTION_SHL
" >>= ", // FUNCTION_SHR
" >>>= " // FUNCTION_USHR
};
private Exprent left;
private Exprent right;
private int condtype = CONDITION_NONE;
{
this.type = EXPRENT_ASSIGNMENT;
}
public AssignmentExprent(Exprent left, Exprent right) {
this.left = left;
this.right = right;
}
public VarType getExprType() {
return left.getExprType();
}
public CheckTypesResult checkExprTypeBounds() {
CheckTypesResult result = new CheckTypesResult();
VarType typeleft = left.getExprType();
VarType typeright = right.getExprType();
if (typeleft.type_family > typeright.type_family) {
result.addMinTypeExprent(right, VarType.getMinTypeInFamily(typeleft.type_family));
}
else if (typeleft.type_family < typeright.type_family) {
result.addMinTypeExprent(left, typeright);
}
else {
result.addMinTypeExprent(left, VarType.getCommonSupertype(typeleft, typeright));
}
return result;
}
public List<Exprent> getAllExprents() {
List<Exprent> lst = new ArrayList<Exprent>();
lst.add(left);
lst.add(right);
return lst;
}
public Exprent copy() {
return new AssignmentExprent(left.copy(), right.copy());
}
public int getPrecedence() {
return 13;
}
public String toJava(int indent) {
VarType leftType = left.getExprType();
VarType rightType = right.getExprType();
boolean fieldInClassInit = false, hiddenField = false;
if (left.type == Exprent.EXPRENT_FIELD) { // first assignment to a final field. Field name without "this" in front of it
FieldExprent field = (FieldExprent)left;
ClassNode node = ((ClassNode)DecompilerContext.getProperty(DecompilerContext.CURRENT_CLASS_NODE));
if (node != null) {
StructField fd = node.classStruct.getField(field.getName(), field.getDescriptor().descriptorString);
if (fd != null) {
if (field.isStatic() && fd.hasModifier(CodeConstants.ACC_FINAL)) {
fieldInClassInit = true;
}
if (node.wrapper.getHiddenMembers().contains(InterpreterUtil.makeUniqueKey(fd.getName(), fd.getDescriptor()))) {
hiddenField = true;
}
}
}
}
if (hiddenField) {
return "";
}
StringBuilder buffer = new StringBuilder();
if (fieldInClassInit) {
buffer.append(((FieldExprent)left).getName());
}
else {
buffer.append(left.toJava(indent));
}
String res = right.toJava(indent);
if (condtype == CONDITION_NONE &&
!leftType.isSuperset(rightType) &&
(rightType.equals(VarType.VARTYPE_OBJECT) || leftType.type != CodeConstants.TYPE_OBJECT)) {
if (right.getPrecedence() >= FunctionExprent.getPrecedence(FunctionExprent.FUNCTION_CAST)) {
res = "(" + res + ")";
}
res = "(" + ExprProcessor.getCastTypeName(leftType) + ")" + res;
}
buffer.append(condtype == CONDITION_NONE ? " = " : funceq[condtype]).append(res);
return buffer.toString();
}
public boolean equals(Object o) {
if (o == this) return true;
if (o == null || !(o instanceof AssignmentExprent)) return false;
AssignmentExprent as = (AssignmentExprent)o;
return InterpreterUtil.equalObjects(left, as.getLeft()) &&
InterpreterUtil.equalObjects(right, as.getRight()) &&
condtype == as.getCondtype();
}
public void replaceExprent(Exprent oldexpr, Exprent newexpr) {
if (oldexpr == left) {
left = newexpr;
}
if (oldexpr == right) {
right = newexpr;
}
}
// *****************************************************************************
// getter and setter methods
// *****************************************************************************
public Exprent getLeft() {
return left;
}
public void setLeft(Exprent left) {
this.left = left;
}
public Exprent getRight() {
return right;
}
public void setRight(Exprent right) {
this.right = right;
}
public int getCondtype() {
return condtype;
}
public void setCondtype(int condtype) {
this.condtype = condtype;
}
}
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