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
017package org.jetbrains.jet.lang.psi;
018
019import com.google.common.collect.Lists;
020import com.intellij.lang.ASTNode;
021import com.intellij.openapi.util.TextRange;
022import com.intellij.psi.PsiElement;
023import com.intellij.psi.PsiReference;
024import com.intellij.psi.PsiReferenceService;
025import com.intellij.psi.impl.source.resolve.reference.ReferenceProvidersRegistry;
026import com.intellij.psi.util.PsiTreeUtil;
027import org.jetbrains.annotations.NotNull;
028import org.jetbrains.annotations.Nullable;
029import org.jetbrains.jet.JetNodeTypes;
030import org.jetbrains.jet.lexer.JetTokens;
031
032import java.util.Collections;
033import java.util.List;
034
035public class JetArrayAccessExpression extends JetReferenceExpression {
036    public JetArrayAccessExpression(@NotNull ASTNode node) {
037        super(node);
038    }
039
040    @Nullable
041    @Override
042    public PsiReference getReference() {
043        PsiReference[] references = getReferences();
044        if (references.length == 1) return references[0];
045        else return null;
046    }
047
048    @NotNull
049    @Override
050    public PsiReference[] getReferences() {
051        return ReferenceProvidersRegistry.getReferencesFromProviders(this, PsiReferenceService.Hints.NO_HINTS);
052    }
053
054    @Override
055    public void accept(@NotNull JetVisitorVoid visitor) {
056        visitor.visitArrayAccessExpression(this);
057    }
058
059    @Override
060    public <R, D> R accept(@NotNull JetVisitor<R, D> visitor, D data) {
061        return visitor.visitArrayAccessExpression(this, data);
062    }
063
064    @Nullable @IfNotParsed
065    public JetExpression getArrayExpression() {
066        return findChildByClass(JetExpression.class);
067    }
068
069    @NotNull
070    public List<JetExpression> getIndexExpressions() {
071        return PsiTreeUtil.getChildrenOfTypeAsList(getIndicesNode(), JetExpression.class);
072    }
073
074    @NotNull
075    public JetContainerNode getIndicesNode() {
076        JetContainerNode indicesNode = (JetContainerNode) findChildByType(JetNodeTypes.INDICES);
077        assert indicesNode != null : "Can't be null because of parser";
078        return indicesNode;
079    }
080
081    @NotNull
082    public List<TextRange> getBracketRanges() {
083        PsiElement lBracket = getIndicesNode().findChildByType(JetTokens.LBRACKET);
084        PsiElement rBracket = getIndicesNode().findChildByType(JetTokens.RBRACKET);
085        if (lBracket == null || rBracket == null) {
086            return Collections.emptyList();
087        }
088        return Lists.newArrayList(lBracket.getTextRange(), rBracket.getTextRange());
089    }
090}