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        public boolean isAbsoluteInRootPackage() {
041            KotlinUserTypeStub stub = getStub();
042            if (stub != null) {
043                return stub.isAbsoluteInRootPackage();
044            }
045            return findChildByType(KtTokens.PACKAGE_KEYWORD) != null;
046        }
047    
048        @Override
049        public <R, D> R accept(@NotNull KtVisitor<R, D> visitor, D data) {
050            return visitor.visitUserType(this, data);
051        }
052    
053        public KtTypeArgumentList getTypeArgumentList() {
054            return getStubOrPsiChild(KtStubElementTypes.TYPE_ARGUMENT_LIST);
055        }
056    
057        @NotNull
058        public List<KtTypeProjection> getTypeArguments() {
059            // TODO: empty elements in PSI
060            KtTypeArgumentList typeArgumentList = getTypeArgumentList();
061            return typeArgumentList == null ? Collections.<KtTypeProjection>emptyList() : typeArgumentList.getArguments();
062        }
063    
064        @NotNull
065        @Override
066        public List<KtTypeReference> getTypeArgumentsAsTypes() {
067            List<KtTypeReference> result = Lists.newArrayList();
068            for (KtTypeProjection projection : getTypeArguments()) {
069                result.add(projection.getTypeReference());
070            }
071            return result;
072        }
073    
074        @Nullable @IfNotParsed
075        public KtSimpleNameExpression getReferenceExpression() {
076            KtNameReferenceExpression nameRefExpr = getStubOrPsiChild(KtStubElementTypes.REFERENCE_EXPRESSION);
077            return nameRefExpr != null ? nameRefExpr : getStubOrPsiChild(KtStubElementTypes.ENUM_ENTRY_SUPERCLASS_REFERENCE_EXPRESSION);
078        }
079    
080        @Nullable
081        public KtUserType getQualifier() {
082            return getStubOrPsiChild(KtStubElementTypes.USER_TYPE);
083        }
084    
085        public boolean hasTypesWithTypeArgsInside() {
086            for (KtUserType type : getStubOrPsiChildrenAsList(KtStubElementTypes.USER_TYPE)) {
087                if (!type.getTypeArguments().isEmpty() || type.hasTypesWithTypeArgsInside()) {
088                    return true;
089                }
090            }
091            return false;
092        }
093    
094        public void deleteQualifier() {
095            KtUserType qualifier = getQualifier();
096            assert qualifier != null;
097            PsiElement dot = findChildByType(KtTokens.DOT);
098            assert dot != null;
099            qualifier.delete();
100            dot.delete();
101        }
102    
103        @Nullable
104        public String getReferencedName() {
105            KtSimpleNameExpression referenceExpression = getReferenceExpression();
106            return referenceExpression == null ? null : referenceExpression.getReferencedName();
107        }
108    }