/*
* Copyright 2000-2013 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 com.intellij.psi.impl.compiled;
import com.intellij.lang.PsiBuilder;
import com.intellij.lang.java.lexer.JavaLexer;
import com.intellij.lang.java.parser.JavaParser;
import com.intellij.lang.java.parser.JavaParserUtil;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.pom.java.LanguageLevel;
import com.intellij.psi.*;
import com.intellij.psi.impl.PsiJavaParserFacadeImpl;
import com.intellij.psi.impl.source.DummyHolder;
import com.intellij.psi.impl.source.DummyHolderFactory;
import com.intellij.psi.impl.source.JavaDummyElement;
import com.intellij.psi.impl.source.SourceTreeToPsiMap;
import com.intellij.psi.util.PsiUtil;
import com.intellij.util.IncorrectOperationException;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
/**
* @author ven
*/
public class ClsParsingUtil {
private static final Logger LOG = Logger.getInstance("com.intellij.psi.impl.compiled.ClsParsingUtil");
private static final JavaParserUtil.ParserWrapper ANNOTATION_VALUE = new JavaParserUtil.ParserWrapper() {
@Override
public void parse(final PsiBuilder builder) {
JavaParser.INSTANCE.getDeclarationParser().parseAnnotationValue(builder);
}
};
private ClsParsingUtil() { }
public static PsiExpression createExpressionFromText(final String exprText, final PsiManager manager, final ClsElementImpl parent) {
final PsiJavaParserFacade parserFacade = JavaPsiFacade.getInstance(manager.getProject()).getParserFacade();
final PsiJavaFile dummyJavaFile = ((PsiJavaParserFacadeImpl)parserFacade).getDummyJavaFile(); // to resolve classes from java.lang
final PsiExpression expr;
try {
expr = parserFacade.createExpressionFromText(exprText, dummyJavaFile);
}
catch (IncorrectOperationException e) {
LOG.error(e);
return null;
}
return psiToClsExpression(expr, parent);
}
@NotNull
public static PsiAnnotationMemberValue createMemberValueFromText(final String text, final PsiManager manager, final ClsElementImpl parent) {
final PsiElementFactory factory = JavaPsiFacade.getInstance(manager.getProject()).getElementFactory();
final PsiJavaFile context = ((PsiJavaParserFacadeImpl)factory).getDummyJavaFile(); // to resolve classes from java.lang
final LanguageLevel level = PsiUtil.getLanguageLevel(parent);
final DummyHolder holder = DummyHolderFactory.createHolder(manager, new JavaDummyElement(text, ANNOTATION_VALUE, level), context);
final PsiElement element = SourceTreeToPsiMap.treeElementToPsi(holder.getTreeElement().getFirstChildNode());
if (!(element instanceof PsiAnnotationMemberValue)) {
LOG.error("Could not parse initializer:'" + text + "'");
return null;
}
return getMemberValue(element, parent);
}
@NotNull
public static PsiAnnotationMemberValue getMemberValue(final PsiElement element, final ClsElementImpl parent) {
if (element instanceof PsiExpression) {
return psiToClsExpression((PsiExpression)element, parent);
}
else if (element instanceof PsiArrayInitializerMemberValue) {
PsiAnnotationMemberValue[] initializers = ((PsiArrayInitializerMemberValue)element).getInitializers();
PsiAnnotationMemberValue[] clsInitializers = new PsiAnnotationMemberValue[initializers.length];
ClsArrayInitializerMemberValueImpl arrayValue = new ClsArrayInitializerMemberValueImpl(parent, clsInitializers);
for (int i = 0; i < initializers.length; i++) {
clsInitializers[i] = getMemberValue(initializers[i], arrayValue);
}
return arrayValue;
}
else if (element instanceof PsiAnnotation) {
final PsiAnnotation psiAnnotation = (PsiAnnotation)element;
final PsiJavaCodeReferenceElement referenceElement = psiAnnotation.getNameReferenceElement();
assert referenceElement != null : psiAnnotation;
final String canonicalText = referenceElement.getText(); // class file has FQNs
return new ClsAnnotationValueImpl(parent) {
@Override
protected ClsJavaCodeReferenceElementImpl createReference() {
return new ClsJavaCodeReferenceElementImpl(this, canonicalText);
}
@Override
protected ClsAnnotationParameterListImpl createParameterList() {
PsiNameValuePair[] psiAttributes = psiAnnotation.getParameterList().getAttributes();
return new ClsAnnotationParameterListImpl(this, psiAttributes);
}
@Override
public PsiAnnotationOwner getOwner() {
return (PsiAnnotationOwner)getParent();
}
};
}
else {
LOG.error("Unexpected source element for annotation member value: " + element);
return null;
}
}
@NotNull
private static PsiExpression psiToClsExpression(final PsiExpression expr, @Nullable final ClsElementImpl parent) {
if (expr instanceof PsiLiteralExpression) {
return new ClsLiteralExpressionImpl(parent, expr.getText(), expr.getType(), ((PsiLiteralExpression)expr).getValue());
}
if (expr instanceof PsiPrefixExpression) {
final PsiPrefixExpression prefixExpr = (PsiPrefixExpression)expr;
final ClsJavaTokenImpl operation = new ClsJavaTokenImpl(null, prefixExpr.getOperationTokenType(), prefixExpr.getOperationSign().getText());
final ClsLiteralExpressionImpl literal = (ClsLiteralExpressionImpl) psiToClsExpression(prefixExpr.getOperand(), null);
return new ClsPrefixExpressionImpl(parent, operation, literal);
}
if (expr instanceof PsiClassObjectAccessExpression) {
final String canonicalClassText = ((PsiClassObjectAccessExpression)expr).getOperand().getType().getCanonicalText();
return new ClsClassObjectAccessExpressionImpl(parent, canonicalClassText);
}
if (expr instanceof PsiReferenceExpression) {
return new ClsReferenceExpressionImpl(parent, (PsiReferenceExpression)expr);
}
if (expr instanceof PsiBinaryExpression) {
final PsiBinaryExpression binaryExpr = (PsiBinaryExpression)expr;
final PsiExpression lOperand = psiToClsExpression(binaryExpr.getLOperand(), null);
final ClsJavaTokenImpl operation = new ClsJavaTokenImpl(null, binaryExpr.getOperationTokenType(), binaryExpr.getOperationSign().getText());
final PsiExpression rOperand = psiToClsExpression(binaryExpr.getROperand(), null);
if (lOperand instanceof ClsLiteralExpressionImpl) {
return new ClsBinaryExpressionImpl(parent, (ClsLiteralExpressionImpl)lOperand, operation, (ClsLiteralExpressionImpl)rOperand);
}
else if (lOperand instanceof ClsPrefixExpressionImpl) {
return new ClsBinaryExpressionImpl(parent, (ClsPrefixExpressionImpl)lOperand, operation, (ClsLiteralExpressionImpl)rOperand);
}
}
else {
final PsiConstantEvaluationHelper evaluator = JavaPsiFacade.getInstance(expr.getProject()).getConstantEvaluationHelper();
final Object value = evaluator.computeConstantExpression(expr);
if (value != null) {
return new ClsLiteralExpressionImpl(parent, expr.getText(), expr.getType(), value);
}
}
LOG.error("Unable to compute expression value: " + expr);
return null;
}
public static boolean isJavaIdentifier(@NotNull String identifier, @NotNull LanguageLevel level) {
return StringUtil.isJavaIdentifier(identifier) && !JavaLexer.isKeyword(identifier, level);
}
}