org.jetbrains.plugins.groovy.lang.psi.impl.statements.expressions.GrBinaryExpressionImpl Maven / Gradle / Ivy
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A packaging of the IntelliJ Community Edition groovy-psi library.
This is release number 1 of trunk branch 142.
The newest version!
/*
* Copyright 2000-2014 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.plugins.groovy.lang.psi.impl.statements.expressions;
import com.intellij.lang.ASTNode;
import com.intellij.openapi.util.TextRange;
import com.intellij.psi.*;
import com.intellij.psi.impl.source.resolve.ResolveCache;
import com.intellij.psi.tree.IElementType;
import com.intellij.util.ArrayUtil;
import com.intellij.util.Function;
import com.intellij.util.IncorrectOperationException;
import com.intellij.util.SmartList;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.plugins.groovy.lang.lexer.TokenSets;
import org.jetbrains.plugins.groovy.lang.psi.GroovyElementVisitor;
import org.jetbrains.plugins.groovy.lang.psi.api.GroovyResolveResult;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrBinaryExpression;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrExpression;
import org.jetbrains.plugins.groovy.lang.psi.dataFlow.types.TypeInferenceHelper;
import org.jetbrains.plugins.groovy.lang.psi.impl.PsiImplUtil;
import org.jetbrains.plugins.groovy.lang.psi.impl.statements.expressions.binaryCalculators.GrBinaryExpressionTypeCalculators;
import org.jetbrains.plugins.groovy.lang.psi.impl.statements.expressions.binaryCalculators.GrBinaryFacade;
import java.util.List;
/**
* @author ilyas
*/
public abstract class GrBinaryExpressionImpl extends GrExpressionImpl implements GrBinaryExpression {
private static final ResolveCache.PolyVariantResolver RESOLVER = new ResolveCache.PolyVariantResolver() {
@NotNull
private List resolveSubExpressions(@NotNull GrBinaryExpression expression, final boolean incompleteCode) {
// to avoid SOE, resolve all binary sub-expressions starting from the innermost
final List subExpressions = new SmartList();
expression.getLeftOperand().accept(new PsiRecursiveElementWalkingVisitor() {
@Override
public void visitElement(PsiElement element) {
if (element instanceof GrBinaryExpression) {
super.visitElement(element);
}
}
@Override
protected void elementFinished(@NotNull PsiElement element) {
if (element instanceof GrBinaryExpressionImpl) {
subExpressions.add(((GrBinaryExpressionImpl)element).multiResolve(incompleteCode));
}
}
});
return subExpressions;
}
@NotNull
@Override
public GroovyResolveResult[] resolve(@NotNull GrBinaryExpressionImpl binary, boolean incompleteCode) {
List subExpressions = resolveSubExpressions(binary, incompleteCode);
final IElementType opType = binary.getOperationTokenType();
final PsiType lType = binary.getLeftType();
if (lType == null) return GroovyResolveResult.EMPTY_ARRAY;
PsiType rType = binary.getRightType();
subExpressions.clear(); // hold resolve results until here to avoid them being gc-ed
return TypesUtil.getOverloadedOperatorCandidates(lType, opType, binary, new PsiType[]{rType}, incompleteCode);
}
};
private static final Function TYPE_CALCULATOR = new Function() {
@Override
public PsiType fun(GrBinaryExpressionImpl expression) {
return GrBinaryExpressionTypeCalculators.getTypeCalculator(expression.getFacade()).fun(expression.getFacade());
}
};
private final GrBinaryFacade myFacade = new GrBinaryFacade() {
@NotNull
@Override
public GrExpression getLeftOperand() {
return GrBinaryExpressionImpl.this.getLeftOperand();
}
@Nullable
@Override
public GrExpression getRightOperand() {
return GrBinaryExpressionImpl.this.getRightOperand();
}
@NotNull
@Override
public IElementType getOperationTokenType() {
return GrBinaryExpressionImpl.this.getOperationTokenType();
}
@NotNull
@Override
public PsiElement getOperationToken() {
return GrBinaryExpressionImpl.this.getOperationToken();
}
@NotNull
@Override
public GroovyResolveResult[] multiResolve(boolean incompleteCode) {
return GrBinaryExpressionImpl.this.multiResolve(incompleteCode);
}
@NotNull
@Override
public GrExpression getPsiElement() {
return GrBinaryExpressionImpl.this;
}
};
@Nullable
protected PsiType getRightType() {
final GrExpression rightOperand = getRightOperand();
return rightOperand == null ? null : rightOperand.getType();
}
@Nullable
protected PsiType getLeftType() {
return getLeftOperand().getType();
}
public GrBinaryExpressionImpl(@NotNull ASTNode node) {
super(node);
}
@Override
@NotNull
public GrExpression getLeftOperand() {
return findNotNullChildByClass(GrExpression.class);
}
@Override
@Nullable
public GrExpression getRightOperand() {
final PsiElement last = getLastChild();
return last instanceof GrExpression ? (GrExpression)last : null;
}
@Override
@NotNull
public IElementType getOperationTokenType() {
final PsiElement child = getOperationToken();
final ASTNode node = child.getNode();
assert node != null;
return node.getElementType();
}
@Override
@NotNull
public PsiElement getOperationToken() {
return findNotNullChildByType(TokenSets.BINARY_OP_SET);
}
@Override
public void accept(GroovyElementVisitor visitor) {
visitor.visitBinaryExpression(this);
}
@NotNull
@Override
public GroovyResolveResult[] multiResolve(boolean incompleteCode) {
return TypeInferenceHelper.getCurrentContext().multiResolve(this, incompleteCode, RESOLVER);
}
@Override
public PsiType getType() {
return TypeInferenceHelper.getCurrentContext().getExpressionType(this, TYPE_CALCULATOR);
}
@Override
public PsiElement getElement() {
return this;
}
@Override
public TextRange getRangeInElement() {
final PsiElement token = getOperationToken();
final int offset = token.getStartOffsetInParent();
return new TextRange(offset, offset + token.getTextLength());
}
@Override
public PsiElement resolve() {
return PsiImplUtil.extractUniqueElement(multiResolve(false));
}
@NotNull
@Override
public String getCanonicalText() {
return getText();
}
@Override
public PsiElement handleElementRename(String newElementName) throws IncorrectOperationException {
throw new IncorrectOperationException("binary expression cannot be renamed");
}
@Override
public PsiElement bindToElement(@NotNull PsiElement element) throws IncorrectOperationException {
throw new IncorrectOperationException("binary expression cannot be bound to anything");
}
@Override
public boolean isReferenceTo(PsiElement element) {
return getManager().areElementsEquivalent(resolve(), element);
}
@NotNull
@Override
public Object[] getVariants() {
return ArrayUtil.EMPTY_OBJECT_ARRAY;
}
@Override
public boolean isSoft() {
return false;
}
@Override
public PsiReference getReference() {
return this;
}
private GrBinaryFacade getFacade() {
return myFacade;
}
}