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 org.jetbrains.annotations.NotNull;
021import org.jetbrains.annotations.Nullable;
022import org.jetbrains.jet.JetNodeTypes;
023
024public class JetLabelQualifiedExpression extends JetExpressionImpl {
025
026    public JetLabelQualifiedExpression(@NotNull ASTNode node) {
027        super(node);
028    }
029    
030    @Nullable
031    public JetSimpleNameExpression getTargetLabel() {
032        JetContainerNode qualifier = (JetContainerNode) findChildByType(JetNodeTypes.LABEL_QUALIFIER);
033        if (qualifier == null) return null;
034        return (JetSimpleNameExpression) qualifier.findChildByType(JetNodeTypes.LABEL_REFERENCE);
035    }
036
037    @Nullable @IfNotParsed
038    public JetExpression getLabeledExpression() {
039        return findChildByClass(JetExpression.class);
040    }
041
042    @Nullable
043    public String getLabelName() {
044        JetSimpleNameExpression labelElement = getTargetLabel();
045        assert labelElement == null || labelElement.getText().startsWith("@");
046        return labelElement == null ? null : labelElement.getText().substring(1);
047    }
048}