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.lexer.JetTokens;
023    
024    import java.util.Collections;
025    import java.util.List;
026    
027    public class JetNullableType extends JetTypeElement {
028        public JetNullableType(@NotNull ASTNode node) {
029            super(node);
030        }
031        
032        @NotNull
033        public ASTNode getQuestionMarkNode() {
034            return getNode().findChildByType(JetTokens.QUEST);
035        }
036    
037        @NotNull
038        @Override
039        public List<JetTypeReference> getTypeArgumentsAsTypes() {
040            JetTypeElement innerType = getInnerType();
041            return innerType == null ? Collections.<JetTypeReference>emptyList() : innerType.getTypeArgumentsAsTypes();
042        }
043    
044        @Override
045        public <R, D> R accept(@NotNull JetVisitor<R, D> visitor, D data) {
046            return visitor.visitNullableType(this, data);
047        }
048    
049        @Nullable
050        @IfNotParsed
051        public JetTypeElement getInnerType() {
052            return findChildByClass(JetTypeElement.class);
053        }
054    }