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 com.intellij.psi.PsiElementVisitor;
021    import com.intellij.psi.PsiFile;
022    import com.intellij.psi.impl.source.tree.LazyParseablePsiElement;
023    import org.jetbrains.annotations.NotNull;
024    import org.jetbrains.annotations.Nullable;
025    import org.jetbrains.kotlin.KtNodeTypes;
026    import org.jetbrains.kotlin.lexer.KtTokens;
027    
028    import java.util.List;
029    
030    public class KtLambdaExpression extends LazyParseablePsiElement implements KtExpression {
031        public KtLambdaExpression(CharSequence text) {
032            super(KtNodeTypes.LAMBDA_EXPRESSION, text);
033        }
034    
035        @Override
036        public <R, D> R accept(@NotNull KtVisitor<R, D> visitor, D data) {
037            return visitor.visitLambdaExpression(this, data);
038        }
039    
040        @NotNull
041        public KtFunctionLiteral getFunctionLiteral() {
042            return findChildByType(KtNodeTypes.FUNCTION_LITERAL).getPsi(KtFunctionLiteral.class);
043        }
044    
045        @NotNull
046        public List<KtParameter> getValueParameters() {
047            return getFunctionLiteral().getValueParameters();
048        }
049    
050        @Nullable
051        public KtBlockExpression getBodyExpression() {
052            return getFunctionLiteral().getBodyExpression();
053        }
054    
055        public boolean hasDeclaredReturnType() {
056            return getFunctionLiteral().getTypeReference() != null;
057        }
058    
059        @NotNull
060        public KtElement asElement() {
061            return this;
062        }
063    
064        @NotNull
065        public ASTNode getLeftCurlyBrace() {
066            return getFunctionLiteral().getNode().findChildByType(KtTokens.LBRACE);
067        }
068    
069        @Nullable
070        public ASTNode getRightCurlyBrace() {
071            return getFunctionLiteral().getNode().findChildByType(KtTokens.RBRACE);
072        }
073    
074        @NotNull
075        @Override
076        public KtFile getContainingKtFile() {
077            PsiFile file = getContainingFile();
078            assert file instanceof KtFile : "KtElement not inside KtFile: " + file + " " + file.getText();
079            return (KtFile) file;
080        }
081    
082        @Override
083        public <D> void acceptChildren(@NotNull KtVisitor<Void, D> visitor, D data) {
084            KtPsiUtil.visitChildren(this, visitor, data);
085        }
086    
087        @Override
088        public final void accept(@NotNull PsiElementVisitor visitor) {
089            if (visitor instanceof KtVisitor) {
090                accept((KtVisitor) visitor, null);
091            }
092            else {
093                visitor.visitElement(this);
094            }
095        }
096    
097        @Override
098        public String toString() {
099            return getNode().getElementType().toString();
100        }
101    
102        @NotNull
103        @Override
104        public KtElement getPsiOrParent() {
105            return this;
106        }
107    }