| /* |
| * Copyright 2009-2014 Bas Leijdekkers |
| * |
| * 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.opassign; |
| |
| import com.intellij.psi.*; |
| import com.intellij.psi.tree.IElementType; |
| import com.siyeh.ig.psiutils.ParenthesesUtils; |
| import com.siyeh.ig.psiutils.VariableAccessUtils; |
| import com.siyeh.ipp.base.PsiElementPredicate; |
| |
| class ReplaceAssignmentWithPostfixExpressionPredicate implements PsiElementPredicate { |
| |
| private static final Integer ONE = Integer.valueOf(1); |
| |
| public boolean satisfiedBy(PsiElement element) { |
| if (!(element instanceof PsiAssignmentExpression)) { |
| return false; |
| } |
| final PsiAssignmentExpression assignmentExpression = |
| (PsiAssignmentExpression)element; |
| final PsiExpression lhs = assignmentExpression.getLExpression(); |
| final PsiExpression strippedLhs = |
| ParenthesesUtils.stripParentheses(lhs); |
| if (!(strippedLhs instanceof PsiReferenceExpression)) { |
| return false; |
| } |
| final PsiReferenceExpression referenceExpression = |
| (PsiReferenceExpression)strippedLhs; |
| final PsiElement target = referenceExpression.resolve(); |
| if (!(target instanceof PsiVariable)) { |
| return false; |
| } |
| final PsiVariable variable = (PsiVariable)target; |
| final PsiExpression rhs = assignmentExpression.getRExpression(); |
| if (!(rhs instanceof PsiBinaryExpression)) { |
| return false; |
| } |
| final PsiBinaryExpression binaryExpression = (PsiBinaryExpression)rhs; |
| final PsiExpression rOperand = binaryExpression.getROperand(); |
| if (rOperand == null) { |
| return false; |
| } |
| final PsiExpression lOperand = binaryExpression.getLOperand(); |
| final IElementType tokenType = binaryExpression.getOperationTokenType(); |
| if (lOperand instanceof PsiLiteral) { |
| final PsiLiteral literal = (PsiLiteral)lOperand; |
| final Object value = literal.getValue(); |
| if (ONE != value) { |
| return false; |
| } |
| if (!VariableAccessUtils.evaluatesToVariable(rOperand, variable)) { |
| return false; |
| } |
| return JavaTokenType.PLUS.equals(tokenType); |
| } |
| else if (rOperand instanceof PsiLiteral) { |
| final PsiLiteral literal = (PsiLiteral)rOperand; |
| final Object value = literal.getValue(); |
| if (ONE != value) { |
| return false; |
| } |
| if (!VariableAccessUtils.evaluatesToVariable(lOperand, variable)) { |
| return false; |
| } |
| return !(!JavaTokenType.PLUS.equals(tokenType) && |
| !JavaTokenType.MINUS.equals(tokenType)); |
| } |
| return false; |
| } |
| } |