| /* |
| * Copyright 2000-2009 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 com.intellij.psi.impl.source.tree.java; |
| |
| import com.intellij.lang.ASTNode; |
| import com.intellij.openapi.diagnostic.Logger; |
| import com.intellij.psi.*; |
| import com.intellij.psi.impl.source.tree.ChildRole; |
| import com.intellij.psi.impl.source.tree.ElementType; |
| import com.intellij.psi.impl.source.tree.JavaElementType; |
| import com.intellij.psi.tree.ChildRoleBase; |
| import com.intellij.psi.tree.IElementType; |
| import com.intellij.psi.tree.TokenSet; |
| import org.jetbrains.annotations.NotNull; |
| |
| public class PsiAssignmentExpressionImpl extends ExpressionPsiElement implements PsiAssignmentExpression { |
| private static final Logger LOG = Logger.getInstance("#com.intellij.psi.impl.source.tree.java.PsiAssignmentExpressionImpl"); |
| |
| public PsiAssignmentExpressionImpl() { |
| super(JavaElementType.ASSIGNMENT_EXPRESSION); |
| } |
| |
| @Override |
| @NotNull |
| public PsiExpression getLExpression() { |
| return (PsiExpression)findChildByRoleAsPsiElement(ChildRole.LOPERAND); |
| } |
| |
| @Override |
| public PsiExpression getRExpression() { |
| return (PsiExpression)findChildByRoleAsPsiElement(ChildRole.ROPERAND); |
| } |
| |
| @Override |
| @NotNull |
| public PsiJavaToken getOperationSign() { |
| return (PsiJavaToken)findChildByRoleAsPsiElement(ChildRole.OPERATION_SIGN); |
| } |
| |
| @Override |
| @NotNull |
| public IElementType getOperationTokenType() { |
| return getOperationSign().getTokenType(); |
| } |
| |
| @Override |
| public PsiType getType() { |
| return getLExpression().getType(); |
| } |
| |
| @Override |
| public ASTNode findChildByRole(int role) { |
| LOG.assertTrue(ChildRole.isUnique(role)); |
| switch (role) { |
| default: |
| return null; |
| |
| case ChildRole.LOPERAND: |
| return getFirstChildNode(); |
| |
| case ChildRole.ROPERAND: |
| return ElementType.EXPRESSION_BIT_SET.contains(getLastChildNode().getElementType()) ? getLastChildNode() : null; |
| |
| case ChildRole.OPERATION_SIGN: |
| return findChildByType(OUR_OPERATIONS_BIT_SET); |
| } |
| } |
| |
| @Override |
| public int getChildRole(ASTNode child) { |
| LOG.assertTrue(child.getTreeParent() == this); |
| if (ElementType.EXPRESSION_BIT_SET.contains(child.getElementType())) { |
| if (child == getFirstChildNode()) return ChildRole.LOPERAND; |
| if (child == getLastChildNode()) return ChildRole.ROPERAND; |
| return ChildRoleBase.NONE; |
| } |
| else if (OUR_OPERATIONS_BIT_SET.contains(child.getElementType())) { |
| return ChildRole.OPERATION_SIGN; |
| } |
| else { |
| return ChildRoleBase.NONE; |
| } |
| } |
| |
| private static final TokenSet OUR_OPERATIONS_BIT_SET = TokenSet.create(JavaTokenType.EQ, JavaTokenType.ASTERISKEQ, JavaTokenType.DIVEQ, |
| JavaTokenType.PERCEQ, JavaTokenType.PLUSEQ, JavaTokenType.MINUSEQ, |
| JavaTokenType.LTLTEQ, JavaTokenType.GTGTEQ, JavaTokenType.GTGTGTEQ, |
| JavaTokenType.ANDEQ, JavaTokenType.OREQ, JavaTokenType.XOREQ); |
| |
| @Override |
| public void accept(@NotNull PsiElementVisitor visitor) { |
| if (visitor instanceof JavaElementVisitor) { |
| ((JavaElementVisitor)visitor).visitAssignmentExpression(this); |
| } |
| else { |
| visitor.visitElement(this); |
| } |
| } |
| |
| public String toString() { |
| return "PsiAssignmentExpression:" + getText(); |
| } |
| } |
| |