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.JetNodeTypes;
025    import org.jetbrains.jet.lexer.JetTokens;
026    
027    import java.util.Collections;
028    import java.util.List;
029    
030    public class JetPropertyAccessor extends JetDeclarationImpl
031            implements JetDeclarationWithBody, JetModifierListOwner, JetWithExpressionInitializer {
032        public JetPropertyAccessor(@NotNull ASTNode node) {
033            super(node);
034        }
035    
036        @Override
037        public <R, D> R accept(@NotNull JetVisitor<R, D> visitor, D data) {
038            return visitor.visitPropertyAccessor(this, data);
039        }
040    
041        public boolean isSetter() {
042            return findChildByType(JetTokens.SET_KEYWORD) != null;
043        }
044    
045        public boolean isGetter() {
046            return findChildByType(JetTokens.GET_KEYWORD) != null;
047        }
048    
049        @Nullable
050        public JetParameter getParameter() {
051            JetParameterList parameterList = (JetParameterList) findChildByType(JetNodeTypes.VALUE_PARAMETER_LIST);
052            if (parameterList == null) return null;
053            List<JetParameter> parameters = parameterList.getParameters();
054            if (parameters.isEmpty()) return null;
055            return parameters.get(0);
056        }
057    
058        @NotNull
059        @Override
060        public List<JetParameter> getValueParameters() {
061            JetParameter parameter = getParameter();
062            if (parameter == null) {
063                return Collections.emptyList();
064            }
065            return Collections.singletonList(parameter);
066        }
067    
068        @Nullable
069        @Override
070        public JetExpression getBodyExpression() {
071            return findChildByClass(JetExpression.class);
072        }
073    
074        @Override
075        public boolean hasBlockBody() {
076            return getEqualsToken() == null;
077        }
078    
079        @Nullable
080        public PsiElement getEqualsToken() {
081            return findChildByType(JetTokens.EQ);
082        }
083    
084        @Override
085        public boolean hasDeclaredReturnType() {
086            return true;
087        }
088    
089        @NotNull
090        @Override
091        public JetElement asElement() {
092            return this;
093        }
094    
095        @Nullable
096        public JetTypeReference getReturnTypeReference() {
097            return findChildByClass(JetTypeReference.class);
098        }
099    
100        @NotNull
101        public PsiElement getNamePlaceholder() {
102            PsiElement get = findChildByType(JetTokens.GET_KEYWORD);
103            if (get != null) {
104                return get;
105            }
106            return findChildByType(JetTokens.SET_KEYWORD);
107        }
108    
109        @Nullable
110        @Override
111        public JetExpression getInitializer() {
112            return PsiTreeUtil.getNextSiblingOfType(getEqualsToken(), JetExpression.class);
113        }
114    }