/*******************************************************************************
* Copyright (c) 2000, 2013 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.internal.codeassist.impl;
import java.util.Map;
import org.eclipse.jdt.core.compiler.CharOperation;
import org.eclipse.jdt.internal.compiler.*;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
import org.eclipse.jdt.internal.compiler.env.*;
import org.eclipse.jdt.internal.compiler.ast.*;
import org.eclipse.jdt.internal.compiler.lookup.*;
import org.eclipse.jdt.internal.compiler.parser.*;
import org.eclipse.jdt.internal.compiler.problem.ProblemSeverities;
import org.eclipse.jdt.internal.compiler.impl.*;
import org.eclipse.jdt.internal.core.NameLookup;
import org.eclipse.jdt.internal.core.SearchableEnvironment;
@SuppressWarnings("rawtypes")
public abstract class Engine implements ITypeRequestor {
public LookupEnvironment lookupEnvironment;
protected CompilationUnitScope unitScope;
public SearchableEnvironment nameEnvironment;
public AssistOptions options;
public CompilerOptions compilerOptions;
public boolean forbiddenReferenceIsError;
public boolean discouragedReferenceIsError;
public boolean importCachesInitialized = false;
public char[][][] importsCache;
public ImportBinding[] onDemandImportsCache;
public int importCacheCount = 0;
public int onDemandImportCacheCount = 0;
public char[] currentPackageName = null;
public Engine(Map settings){
this.options = new AssistOptions(settings);
this.compilerOptions = new CompilerOptions(settings);
this.forbiddenReferenceIsError =
(this.compilerOptions.getSeverity(CompilerOptions.ForbiddenReference) & ProblemSeverities.Error) != 0;
this.discouragedReferenceIsError =
(this.compilerOptions.getSeverity(CompilerOptions.DiscouragedReference) & ProblemSeverities.Error) != 0;
}
/**
* Add an additional binary type
*/
public void accept(IBinaryType binaryType, PackageBinding packageBinding, AccessRestriction accessRestriction) {
this.lookupEnvironment.createBinaryTypeFrom(binaryType, packageBinding, accessRestriction);
}
/**
* Add an additional compilation unit.
*/
public void accept(ICompilationUnit sourceUnit, AccessRestriction accessRestriction) {
CompilationResult result = new CompilationResult(sourceUnit, 1, 1, this.compilerOptions.maxProblemsPerUnit);
AssistParser assistParser = getParser();
Object parserState = assistParser.becomeSimpleParser();
CompilationUnitDeclaration parsedUnit =
assistParser.dietParse(sourceUnit, result);
assistParser.restoreAssistParser(parserState);
this.lookupEnvironment.buildTypeBindings(parsedUnit, accessRestriction);
this.lookupEnvironment.completeTypeBindings(parsedUnit, true);
}
/**
* Add additional source types (the first one is the requested type, the rest is formed by the
* secondary types defined in the same compilation unit).
*/
public void accept(ISourceType[] sourceTypes, PackageBinding packageBinding, AccessRestriction accessRestriction) {
CompilationResult result =
new CompilationResult(sourceTypes[0].getFileName(), 1, 1, this.compilerOptions.maxProblemsPerUnit);
CompilationUnitDeclaration unit =
SourceTypeConverter.buildCompilationUnit(
sourceTypes,//sourceTypes[0] is always toplevel here
SourceTypeConverter.FIELD_AND_METHOD // need field and methods
| SourceTypeConverter.MEMBER_TYPE, // need member types
// no need for field initialization
this.lookupEnvironment.problemReporter,
result);
if (unit != null) {
this.lookupEnvironment.buildTypeBindings(unit, accessRestriction);
this.lookupEnvironment.completeTypeBindings(unit, true);
}
}
public abstract AssistParser getParser();
public void initializeImportCaches() {
if (this.currentPackageName == null) {
initializePackageCache();
}
ImportBinding[] importBindings = this.unitScope.imports;
int length = importBindings == null ? 0 : importBindings.length;
for (int i = 0; i < length; i++) {
ImportBinding importBinding = importBindings[i];
if(importBinding.onDemand) {
if(this.onDemandImportsCache == null) {
this.onDemandImportsCache = new ImportBinding[length - i];
}
this.onDemandImportsCache[this.onDemandImportCacheCount++] =
importBinding;
} else {
if(!(importBinding.resolvedImport instanceof MethodBinding) ||
importBinding instanceof ImportConflictBinding) {
if(this.importsCache == null) {
this.importsCache = new char[length - i][][];
}
this.importsCache[this.importCacheCount++] = new char[][]{
importBinding.compoundName[importBinding.compoundName.length - 1],
CharOperation.concatWith(importBinding.compoundName, '.')
};
}
}
}
this.importCachesInitialized = true;
}
public void initializePackageCache() {
if (this.unitScope.fPackage != null) {
this.currentPackageName = CharOperation.concatWith(this.unitScope.fPackage.compoundName, '.');
} else if (this.unitScope.referenceContext != null &&
this.unitScope.referenceContext.currentPackage != null) {
this.currentPackageName = CharOperation.concatWith(this.unitScope.referenceContext.currentPackage.tokens, '.');
} else {
this.currentPackageName = CharOperation.NO_CHAR;
}
}
protected boolean mustQualifyType(
char[] packageName,
char[] typeName,
char[] enclosingTypeNames,
int modifiers) {
// If there are no types defined into the current CU yet.
if (this.unitScope == null)
return true;
if(!this.importCachesInitialized) {
initializeImportCaches();
}
for (int i = 0; i < this.importCacheCount; i++) {
char[][] importName = this.importsCache[i];
if(CharOperation.equals(typeName, importName[0])) {
char[] fullyQualifiedTypeName =
enclosingTypeNames == null || enclosingTypeNames.length == 0
? CharOperation.concat(
packageName,
typeName,
'.')
: CharOperation.concat(
CharOperation.concat(
packageName,
enclosingTypeNames,
'.'),
typeName,
'.');
return !CharOperation.equals(fullyQualifiedTypeName, importName[1]);
}
}
if ((enclosingTypeNames == null || enclosingTypeNames.length == 0 ) && CharOperation.equals(this.currentPackageName, packageName))
return false;
char[] fullyQualifiedEnclosingTypeName = null;
for (int i = 0; i < this.onDemandImportCacheCount; i++) {
ImportBinding importBinding = this.onDemandImportsCache[i];
Binding resolvedImport = importBinding.resolvedImport;
char[][] importName = importBinding.compoundName;
char[] importFlatName = CharOperation.concatWith(importName, '.');
boolean isFound = false;
// resolvedImport is a ReferenceBindng or a PackageBinding
if(resolvedImport instanceof ReferenceBinding) {
if(enclosingTypeNames != null && enclosingTypeNames.length != 0) {
if(fullyQualifiedEnclosingTypeName == null) {
fullyQualifiedEnclosingTypeName =
CharOperation.concat(
packageName,
enclosingTypeNames,
'.');
}
if(CharOperation.equals(fullyQualifiedEnclosingTypeName, importFlatName)) {
if(importBinding.isStatic()) {
isFound = (modifiers & ClassFileConstants.AccStatic) != 0;
} else {
isFound = true;
}
}
}
} else {
if(enclosingTypeNames == null || enclosingTypeNames.length == 0) {
if(CharOperation.equals(packageName, importFlatName)) {
if(importBinding.isStatic()) {
isFound = (modifiers & ClassFileConstants.AccStatic) != 0;
} else {
isFound = true;
}
}
}
}
// find potential conflict with another import
if(isFound) {
for (int j = 0; j < this.onDemandImportCacheCount; j++) {
if(i != j) {
ImportBinding conflictingImportBinding = this.onDemandImportsCache[j];
if(conflictingImportBinding.resolvedImport instanceof ReferenceBinding) {
ReferenceBinding refBinding =
(ReferenceBinding) conflictingImportBinding.resolvedImport;
if (refBinding.getMemberType(typeName) != null) {
return true;
}
} else {
char[] conflictingImportName =
CharOperation.concatWith(conflictingImportBinding.compoundName, '.');
if (this.nameEnvironment.nameLookup.findType(
String.valueOf(typeName),
String.valueOf(conflictingImportName),
false,
NameLookup.ACCEPT_ALL,
false/*don't check restrictions*/) != null) {
return true;
}
}
}
}
return false;
}
}
return true;
}
/*
* Find the node (a field, a method or an initializer) at the given position
* and parse its block statements if it is a method or an initializer.
* Returns the node or null if not found
*/
protected ASTNode parseBlockStatements(CompilationUnitDeclaration unit, int position) {
int length = unit.types.length;
for (int i = 0; i < length; i++) {
TypeDeclaration type = unit.types[i];
if (type.declarationSourceStart < position
&& type.declarationSourceEnd >= position) {
getParser().scanner.setSource(unit.compilationResult);
return parseBlockStatements(type, unit, position);
}
}
return null;
}
private ASTNode parseBlockStatements(
TypeDeclaration type,
CompilationUnitDeclaration unit,
int position) {
//members
TypeDeclaration[] memberTypes = type.memberTypes;
if (memberTypes != null) {
int length = memberTypes.length;
for (int i = 0; i < length; i++) {
TypeDeclaration memberType = memberTypes[i];
if (memberType.bodyStart > position)
continue;
if (memberType.declarationSourceEnd >= position) {
return parseBlockStatements(memberType, unit, position);
}
}
}
//methods
AbstractMethodDeclaration[] methods = type.methods;
if (methods != null) {
int length = methods.length;
for (int i = 0; i < length; i++) {
AbstractMethodDeclaration method = methods[i];
if (method.bodyStart > position + 1)
continue;
if(method.isDefaultConstructor())
continue;
if (method.declarationSourceEnd >= position) {
getParser().parseBlockStatements(method, unit);
return method;
}
}
}
//initializers
FieldDeclaration[] fields = type.fields;
if (fields != null) {
int length = fields.length;
for (int i = 0; i < length; i++) {
FieldDeclaration field = fields[i];
if (field.sourceStart > position)
continue;
if (field.declarationSourceEnd >= position) {
if (field instanceof Initializer) {
getParser().parseBlockStatements((Initializer)field, type, unit);
}
return field;
}
}
}
return null;
}
protected void reset(boolean resetLookupEnvironment) {
if (resetLookupEnvironment) this.lookupEnvironment.reset();
}
public static char[] getTypeSignature(TypeBinding typeBinding) {
char[] result = typeBinding.signature();
if (result != null) {
result = CharOperation.replaceOnCopy(result, '/', '.');
}
return result;
}
public static char[] getSignature(MethodBinding methodBinding) {
char[] result = null;
int oldMod = methodBinding.modifiers;
//TODO remove the next line when method from binary type will be able to generate generic signature
methodBinding.modifiers |= ExtraCompilerModifiers.AccGenericSignature;
result = methodBinding.genericSignature();
if(result == null) {
result = methodBinding.signature();
}
methodBinding.modifiers = oldMod;
if (result != null) {
result = CharOperation.replaceOnCopy(result, '/', '.');
}
return result;
}
public static char[] getSignature(TypeBinding typeBinding) {
char[] result = null;
result = typeBinding.genericTypeSignature();
if (result != null) {
result = CharOperation.replaceOnCopy(result, '/', '.');
}
return result;
}
}
