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 com.intellij.psi.PsiElement;
021    import com.intellij.psi.util.PsiTreeUtil;
022    import org.jetbrains.annotations.NotNull;
023    import org.jetbrains.annotations.Nullable;
024    import org.jetbrains.jet.lang.psi.stubs.PsiJetPropertyAccessorStub;
025    import org.jetbrains.jet.lang.psi.stubs.elements.JetStubElementTypes;
026    import org.jetbrains.jet.lexer.JetTokens;
027    
028    import java.util.Collections;
029    import java.util.List;
030    
031    public class JetPropertyAccessor extends JetDeclarationStub<PsiJetPropertyAccessorStub>
032            implements JetDeclarationWithBody, JetModifierListOwner, JetWithExpressionInitializer {
033        public JetPropertyAccessor(@NotNull ASTNode node) {
034            super(node);
035        }
036    
037        public JetPropertyAccessor(@NotNull PsiJetPropertyAccessorStub stub) {
038            super(stub, JetStubElementTypes.PROPERTY_ACCESSOR);
039        }
040    
041        @Override
042        public <R, D> R accept(@NotNull JetVisitor<R, D> visitor, D data) {
043            return visitor.visitPropertyAccessor(this, data);
044        }
045    
046        public boolean isSetter() {
047            PsiJetPropertyAccessorStub stub = getStub();
048            if (stub != null) {
049                return !stub.isGetter();
050            }
051            return findChildByType(JetTokens.SET_KEYWORD) != null;
052        }
053    
054        public boolean isGetter() {
055            PsiJetPropertyAccessorStub stub = getStub();
056            if (stub != null) {
057                return stub.isGetter();
058            }
059            return findChildByType(JetTokens.GET_KEYWORD) != null;
060        }
061    
062        @Nullable
063        public JetParameter getParameter() {
064            JetParameterList parameterList = getStubOrPsiChild(JetStubElementTypes.VALUE_PARAMETER_LIST);
065            if (parameterList == null) return null;
066            List<JetParameter> parameters = parameterList.getParameters();
067            if (parameters.isEmpty()) return null;
068            return parameters.get(0);
069        }
070    
071        @NotNull
072        @Override
073        public List<JetParameter> getValueParameters() {
074            JetParameter parameter = getParameter();
075            if (parameter == null) {
076                return Collections.emptyList();
077            }
078            return Collections.singletonList(parameter);
079        }
080    
081        @Nullable
082        @Override
083        public JetExpression getBodyExpression() {
084            return findChildByClass(JetExpression.class);
085        }
086    
087        @Override
088        public boolean hasBlockBody() {
089            return getEqualsToken() == null;
090        }
091    
092        @Override
093        public boolean hasBody() {
094            PsiJetPropertyAccessorStub stub = getStub();
095            if (stub != null) {
096                return stub.hasBody();
097            }
098            return getBodyExpression() != null;
099        }
100    
101        @Nullable
102        public PsiElement getEqualsToken() {
103            return findChildByType(JetTokens.EQ);
104        }
105    
106        @Override
107        public boolean hasDeclaredReturnType() {
108            return true;
109        }
110    
111        @Nullable
112        public JetTypeReference getReturnTypeReference() {
113            return getStubOrPsiChild(JetStubElementTypes.TYPE_REFERENCE);
114        }
115    
116        @NotNull
117        public PsiElement getNamePlaceholder() {
118            PsiElement get = findChildByType(JetTokens.GET_KEYWORD);
119            if (get != null) {
120                return get;
121            }
122            return findChildByType(JetTokens.SET_KEYWORD);
123        }
124    
125        @Nullable
126        public ASTNode getRightParenthesis() {
127            return getNode().findChildByType(JetTokens.RPAR);
128        }
129    
130        @Nullable
131        @Override
132        public JetExpression getInitializer() {
133            return PsiTreeUtil.getNextSiblingOfType(getEqualsToken(), JetExpression.class);
134        }
135    
136        @Override
137        public boolean hasInitializer() {
138            return getInitializer() != null;
139        }
140    }