001    /*
002     * Copyright 2010-2013 JetBrains s.r.o.
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    
017    package org.jetbrains.jet.lang.psi;
018    
019    import com.intellij.lang.ASTNode;
020    import com.intellij.psi.PsiElement;
021    import com.intellij.util.IncorrectOperationException;
022    import org.jetbrains.annotations.NotNull;
023    import org.jetbrains.jet.JetNodeType;
024    
025    import static org.jetbrains.jet.lang.psi.PsiPackage.JetPsiFactory;
026    
027    public abstract class JetExpressionImpl extends JetElementImpl implements JetExpression {
028        public JetExpressionImpl(@NotNull ASTNode node) {
029            super(node);
030        }
031    
032        @Override
033        public <R, D> R accept(@NotNull JetVisitor<R, D> visitor, D data) {
034            return visitor.visitExpression(this, data);
035        }
036    
037        protected JetExpression findExpressionUnder(JetNodeType type) {
038            JetContainerNode containerNode = (JetContainerNode) findChildByType(type);
039            if (containerNode == null) return null;
040    
041            return containerNode.findChildByClass(JetExpression.class);
042        }
043    
044        //NOTE: duplicate with JetExpressionImplStub
045        @NotNull
046        @Override
047        public PsiElement replace(@NotNull PsiElement newElement) throws IncorrectOperationException {
048            PsiElement parent = getParent();
049            if (parent instanceof JetExpression && newElement instanceof JetExpression &&
050                JetPsiUtil.areParenthesesNecessary((JetExpression) newElement, this, (JetExpression) parent)) {
051                return super.replace(JetPsiFactory(this).createExpression("(" + newElement.getText() + ")"));
052            }
053            return super.replace(newElement);
054        }
055    }