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
017package org.jetbrains.jet.lang.psi;
018
019import com.intellij.lang.ASTNode;
020import com.intellij.psi.PsiElement;
021import org.jetbrains.annotations.NotNull;
022import org.jetbrains.annotations.Nullable;
023import org.jetbrains.jet.lexer.JetToken;
024import org.jetbrains.jet.lexer.JetTokens;
025
026public 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}