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.lexer.JetTokens;
023    import org.jetbrains.kotlin.psi.stubs.KotlinPlaceHolderStub;
024    import org.jetbrains.kotlin.psi.stubs.elements.JetStubElementTypes;
025    
026    import java.util.Collections;
027    import java.util.List;
028    
029    public class JetNullableType extends JetElementImplStub<KotlinPlaceHolderStub<JetNullableType>> implements JetTypeElement {
030        public JetNullableType(@NotNull ASTNode node) {
031            super(node);
032        }
033    
034        public JetNullableType(@NotNull KotlinPlaceHolderStub<JetNullableType> stub) {
035            super(stub, JetStubElementTypes.NULLABLE_TYPE);
036        }
037    
038        @NotNull
039        public ASTNode getQuestionMarkNode() {
040            return getNode().findChildByType(JetTokens.QUEST);
041        }
042    
043        @NotNull
044        @Override
045        public List<JetTypeReference> getTypeArgumentsAsTypes() {
046            JetTypeElement innerType = getInnerType();
047            return innerType == null ? Collections.<JetTypeReference>emptyList() : innerType.getTypeArgumentsAsTypes();
048        }
049    
050        @Override
051        public <R, D> R accept(@NotNull JetVisitor<R, D> visitor, D data) {
052            return visitor.visitNullableType(this, data);
053        }
054    
055        @Nullable
056        @IfNotParsed
057        public JetTypeElement getInnerType() {
058            return JetStubbedPsiUtil.getStubOrPsiChild(this, JetStubElementTypes.TYPE_ELEMENT_TYPES, JetTypeElement.ARRAY_FACTORY);
059        }
060    }