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 org.jetbrains.annotations.NotNull;
021    import org.jetbrains.annotations.Nullable;
022    import org.jetbrains.jet.JetNodeTypes;
023    
024    public 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    }