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 org.jetbrains.annotations.NotNull;
022    import org.jetbrains.annotations.Nullable;
023    import org.jetbrains.jet.lexer.JetToken;
024    import org.jetbrains.jet.lexer.JetTokens;
025    
026    public abstract class JetQualifiedExpression extends JetExpressionImpl {
027        public JetQualifiedExpression(@NotNull ASTNode node) {
028            super(node);
029        }
030    
031        @NotNull
032        public JetExpression getReceiverExpression() {
033            JetExpression left = findChildByClass(JetExpression.class);
034            assert left != null;
035            return left;
036        }
037    
038        @Nullable @IfNotParsed
039        public JetExpression getSelectorExpression() {
040            ASTNode node = getOperationTokenNode();
041            while (node != null) {
042                PsiElement psi = node.getPsi();
043                if (psi instanceof JetExpression) {
044                    return (JetExpression) psi;
045                }
046                node = node.getTreeNext();
047            }
048    
049            return null;
050        }
051        @NotNull
052        public ASTNode getOperationTokenNode() {
053            ASTNode operationNode = getNode().findChildByType(JetTokens.OPERATIONS);
054            assert operationNode != null;
055            return operationNode;
056        }
057    
058        @NotNull
059        public JetToken getOperationSign() {
060            return (JetToken) getOperationTokenNode().getElementType();
061        }
062    }