001    /*
002     * Copyright 2010-2015 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.kotlin.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.kotlin.JetNodeType;
024    
025    import static org.jetbrains.kotlin.psi.PsiPackage.JetPsiFactory;
026    import static org.jetbrains.kotlin.psi.PsiPackage.createExpressionByPattern;
027    
028    public abstract class JetExpressionImpl extends JetElementImpl implements JetExpression {
029        public JetExpressionImpl(@NotNull ASTNode node) {
030            super(node);
031        }
032    
033        @Override
034        public <R, D> R accept(@NotNull JetVisitor<R, D> visitor, D data) {
035            return visitor.visitExpression(this, data);
036        }
037    
038        protected JetExpression findExpressionUnder(JetNodeType type) {
039            JetContainerNode containerNode = (JetContainerNode) findChildByType(type);
040            if (containerNode == null) return null;
041    
042            return containerNode.findChildByClass(JetExpression.class);
043        }
044    
045        //NOTE: duplicate with JetExpressionImplStub
046        @NotNull
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(createExpressionByPattern(JetPsiFactory(this), "($0)", newElement));
053            }
054            return super.replace(newElement);
055        }
056    }