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/*
* Copyright 2003-2005 Dave Griffith
*
* 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 com.siyeh.ipp.equality;
import com.intellij.psi.*;
import com.intellij.psi.tree.IElementType;
import com.intellij.psi.util.TypeConversionUtil;
import com.siyeh.ipp.base.PsiElementPredicate;
import com.siyeh.ipp.psiutils.ErrorUtil;
class ObjectEqualityPredicate implements PsiElementPredicate {
public boolean satisfiedBy(PsiElement element) {
if (!(element instanceof PsiBinaryExpression)) {
return false;
}
final PsiBinaryExpression expression = (PsiBinaryExpression)element;
final IElementType tokenType = expression.getOperationTokenType();
if (!tokenType.equals(JavaTokenType.NE) &&
!tokenType.equals(JavaTokenType.EQEQ)) {
return false;
}
final PsiExpression lhs = expression.getLOperand();
final String lhsText = lhs.getText();
if (PsiKeyword.NULL.equals(lhsText)) {
return false;
}
final PsiType lhsType = lhs.getType();
if (lhsType == null) {
return false;
}
final PsiExpression rhs = expression.getROperand();
if (rhs == null) {
return false;
}
final String rhsText = rhs.getText();
if (PsiKeyword.NULL.equals(rhsText)) {
return false;
}
final PsiType rhsType = rhs.getType();
if (rhsType == null) {
return false;
}
if (TypeConversionUtil.isPrimitiveAndNotNull(lhsType) ||
TypeConversionUtil.isPrimitiveAndNotNull(rhsType)) {
return false;
}
if (rhsType instanceof PsiClassType) {
final PsiClassType rhsClassType = (PsiClassType)rhsType;
final PsiClass rhsClass = rhsClassType.resolve();
if (rhsClass != null && rhsClass.isEnum()) {
return false;
}
}
if (lhsType instanceof PsiClassType) {
final PsiClassType lhsClassType = (PsiClassType)lhsType;
final PsiClass lhsClass = lhsClassType.resolve();
if (lhsClass != null && lhsClass.isEnum()) {
return false;
}
}
return !ErrorUtil.containsError(element);
}
}
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