/*
* Copyright 2000-2016 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.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;
import org.jetbrains.org.objectweb.asm.Opcodes;
/**
* @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(@NotNull String exprText,
@NotNull PsiManager manager,
@NotNull ClsElementImpl parent) {
PsiJavaParserFacade parserFacade = JavaPsiFacade.getInstance(manager.getProject()).getParserFacade();
try {
PsiExpression expr = parserFacade.createExpressionFromText(exprText, null);
return psiToClsExpression(expr, parent);
}
catch (IncorrectOperationException e) {
LOG.error(e);
return null;
}
}
public static PsiAnnotationMemberValue createMemberValueFromText(@NotNull String text,
@NotNull PsiManager manager,
@NotNull ClsElementImpl parent) {
LanguageLevel level = PsiUtil.getLanguageLevel(parent);
DummyHolder holder = DummyHolderFactory.createHolder(manager, new JavaDummyElement(text, ANNOTATION_VALUE, level), null);
PsiElement element = SourceTreeToPsiMap.treeElementToPsi(holder.getTreeElement().getFirstChildNode());
if (!(element instanceof PsiAnnotationMemberValue)) {
LOG.error("Could not parse initializer:'" + text + "'");
return null;
}
return getMemberValue(element, parent);
}
public static PsiAnnotationMemberValue getMemberValue(@NotNull PsiElement element, @NotNull 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;
}
}
static PsiExpression psiToClsExpression(@NotNull PsiExpression expr, @NotNull ClsElementImpl parent) {
if (expr instanceof PsiLiteralExpression) {
boolean forDecompiling = ((ClsFileImpl)parent.getContainingFile()).isForDecompiling();
PsiType type = forDecompiling ? PsiType.NULL : expr.getType();
Object value = forDecompiling ? null : ((PsiLiteralExpression)expr).getValue();
return new ClsLiteralExpressionImpl(parent, expr.getText(), type, value);
}
if (expr instanceof PsiPrefixExpression) {
PsiJavaToken sign = ((PsiPrefixExpression)expr).getOperationSign();
PsiExpression operand = ((PsiPrefixExpression)expr).getOperand();
if (operand == null) {
LOG.error("Invalid prefix expression: " + expr + " [" + expr.getText() + "]");
return null;
}
return new ClsPrefixExpressionImpl(parent, sign, operand);
}
if (expr instanceof PsiClassObjectAccessExpression) {
String exprText = expr.getText();
if (StringUtil.endsWith(exprText, ".class")) {
String classText = exprText.substring(0, exprText.length() - 6);
return new ClsClassObjectAccessExpressionImpl(parent, classText);
}
}
if (expr instanceof PsiReferenceExpression) {
return new ClsReferenceExpressionImpl(parent, (PsiReferenceExpression)expr);
}
if (expr instanceof PsiBinaryExpression) {
PsiJavaToken sign = ((PsiBinaryExpression)expr).getOperationSign();
PsiExpression left = ((PsiBinaryExpression)expr).getLOperand();
PsiExpression right = ((PsiBinaryExpression)expr).getROperand();
if (right == null) {
LOG.error("Invalid binary expression: " + expr + " [" + expr.getText() + "]");
return null;
}
return new ClsBinaryExpressionImpl(parent, sign, left, right);
}
if (((ClsFileImpl)parent.getContainingFile()).isForDecompiling()) {
return new ClsLiteralExpressionImpl(parent, expr.getText(), PsiType.NULL, null);
}
PsiConstantEvaluationHelper evaluator = JavaPsiFacade.getInstance(expr.getProject()).getConstantEvaluationHelper();
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 + " [" + expr.getText() + "]");
return null;
}
public static boolean isJavaIdentifier(@NotNull String identifier, @NotNull LanguageLevel level) {
return StringUtil.isJavaIdentifier(identifier) && !JavaLexer.isKeyword(identifier, level);
}
@Nullable
public static LanguageLevel getLanguageLevelByVersion(int major) {
switch (major) {
case Opcodes.V1_1:
case 45: // other variant of 1.1
case Opcodes.V1_2:
case Opcodes.V1_3:
return LanguageLevel.JDK_1_3;
case Opcodes.V1_4:
return LanguageLevel.JDK_1_4;
case Opcodes.V1_5:
return LanguageLevel.JDK_1_5;
case Opcodes.V1_6:
return LanguageLevel.JDK_1_6;
case Opcodes.V1_7:
return LanguageLevel.JDK_1_7;
case Opcodes.V1_8:
return LanguageLevel.JDK_1_8;
case Opcodes.V1_9:
return LanguageLevel.JDK_1_9;
default:
return null;
}
}
}