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 org.jetbrains.annotations.NotNull;
021    import org.jetbrains.annotations.Nullable;
022    import org.jetbrains.kotlin.JetNodeTypes;
023    import org.jetbrains.kotlin.lexer.JetTokens;
024    
025    public class JetIsExpression extends JetExpressionImpl implements JetOperationExpression {
026        public JetIsExpression(@NotNull ASTNode node) {
027            super(node);
028        }
029    
030        @Override
031        public <R, D> R accept(@NotNull JetVisitor<R, D> visitor, D data) {
032            return visitor.visitIsExpression(this, data);
033        }
034    
035        @NotNull
036        public JetExpression getLeftHandSide() {
037            return findChildByClass(JetExpression.class);
038        }
039    
040        @Nullable @IfNotParsed
041        public JetTypeReference getTypeReference() {
042            return (JetTypeReference) findChildByType(JetNodeTypes.TYPE_REFERENCE);
043        }
044    
045        @Override
046        @NotNull
047        public JetSimpleNameExpression getOperationReference() {
048            return (JetSimpleNameExpression) findChildByType(JetNodeTypes.OPERATION_REFERENCE);
049        }
050    
051        public boolean isNegated() {
052            return getOperationReference().getReferencedNameElementType() == JetTokens.NOT_IS;
053        }
054    
055    }