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.google.common.collect.Lists;
020    import com.intellij.lang.ASTNode;
021    import com.intellij.psi.PsiElement;
022    import org.jetbrains.annotations.NotNull;
023    import org.jetbrains.annotations.Nullable;
024    import org.jetbrains.kotlin.lexer.KtTokens;
025    import org.jetbrains.kotlin.psi.stubs.KotlinUserTypeStub;
026    import org.jetbrains.kotlin.psi.stubs.elements.KtStubElementTypes;
027    
028    import java.util.Collections;
029    import java.util.List;
030    
031    public class KtUserType extends KtElementImplStub<KotlinUserTypeStub> implements KtTypeElement {
032        public KtUserType(@NotNull ASTNode node) {
033            super(node);
034        }
035    
036        public KtUserType(@NotNull KotlinUserTypeStub stub) {
037            super(stub, KtStubElementTypes.USER_TYPE);
038        }
039    
040        @Override
041        public <R, D> R accept(@NotNull KtVisitor<R, D> visitor, D data) {
042            return visitor.visitUserType(this, data);
043        }
044    
045        @Nullable
046        public KtTypeArgumentList getTypeArgumentList() {
047            return getStubOrPsiChild(KtStubElementTypes.TYPE_ARGUMENT_LIST);
048        }
049    
050        @NotNull
051        public List<KtTypeProjection> getTypeArguments() {
052            // TODO: empty elements in PSI
053            KtTypeArgumentList typeArgumentList = getTypeArgumentList();
054            return typeArgumentList == null ? Collections.<KtTypeProjection>emptyList() : typeArgumentList.getArguments();
055        }
056    
057        @NotNull
058        @Override
059        public List<KtTypeReference> getTypeArgumentsAsTypes() {
060            List<KtTypeReference> result = Lists.newArrayList();
061            for (KtTypeProjection projection : getTypeArguments()) {
062                result.add(projection.getTypeReference());
063            }
064            return result;
065        }
066    
067        @Nullable @IfNotParsed
068        public KtSimpleNameExpression getReferenceExpression() {
069            KtNameReferenceExpression nameRefExpr = getStubOrPsiChild(KtStubElementTypes.REFERENCE_EXPRESSION);
070            return nameRefExpr != null ? nameRefExpr : getStubOrPsiChild(KtStubElementTypes.ENUM_ENTRY_SUPERCLASS_REFERENCE_EXPRESSION);
071        }
072    
073        @Nullable
074        public KtUserType getQualifier() {
075            return getStubOrPsiChild(KtStubElementTypes.USER_TYPE);
076        }
077    
078        public void deleteQualifier() {
079            KtUserType qualifier = getQualifier();
080            assert qualifier != null;
081            PsiElement dot = findChildByType(KtTokens.DOT);
082            assert dot != null;
083            qualifier.delete();
084            dot.delete();
085        }
086    
087        @Nullable
088        public String getReferencedName() {
089            KtSimpleNameExpression referenceExpression = getReferenceExpression();
090            return referenceExpression == null ? null : referenceExpression.getReferencedName();
091        }
092    }