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    public abstract class JetExpressionImpl extends JetElementImpl implements JetExpression {
026        public JetExpressionImpl(@NotNull ASTNode node) {
027            super(node);
028        }
029    
030        @Override
031        public void accept(@NotNull JetVisitorVoid visitor) {
032            visitor.visitExpression(this);
033        }
034    
035        @Override
036        public <R, D> R accept(@NotNull JetVisitor<R, D> visitor, D data) {
037            return visitor.visitExpression(this, data);
038        }
039    
040        protected JetExpression findExpressionUnder(JetNodeType type) {
041            JetContainerNode containerNode = (JetContainerNode) findChildByType(type);
042            if (containerNode == null) return null;
043    
044            return containerNode.findChildByClass(JetExpression.class);
045        }
046    
047        @Override
048        public PsiElement replace(@NotNull PsiElement newElement) throws IncorrectOperationException {
049            PsiElement parent = getParent();
050            if (parent instanceof JetExpression && newElement instanceof JetExpression &&
051                JetPsiUtil.areParenthesesNecessary((JetExpression) newElement, this, (JetExpression) parent)) {
052                return super.replace(JetPsiFactory.createExpression(getProject(), "(" + newElement.getText() + ")"));
053            }
054            return super.replace(newElement);
055        }
056    }