/*
* Copyright 2006 Google Inc.
*
* 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.google.gwt.dev.jdt;
import org.eclipse.jdt.internal.compiler.ASTVisitor;
import org.eclipse.jdt.internal.compiler.ast.ArrayQualifiedTypeReference;
import org.eclipse.jdt.internal.compiler.ast.ArrayTypeReference;
import org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration;
import org.eclipse.jdt.internal.compiler.ast.ParameterizedQualifiedTypeReference;
import org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference;
import org.eclipse.jdt.internal.compiler.ast.QualifiedTypeReference;
import org.eclipse.jdt.internal.compiler.ast.SingleTypeReference;
import org.eclipse.jdt.internal.compiler.ast.Wildcard;
import org.eclipse.jdt.internal.compiler.lookup.ArrayBinding;
import org.eclipse.jdt.internal.compiler.lookup.BlockScope;
import org.eclipse.jdt.internal.compiler.lookup.ClassScope;
import org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope;
import org.eclipse.jdt.internal.compiler.lookup.Scope;
import org.eclipse.jdt.internal.compiler.lookup.SourceTypeBinding;
import org.eclipse.jdt.internal.compiler.lookup.TypeBinding;
/**
* Walks the AST to determine every location from which a type is referenced.
*/
public abstract class TypeRefVisitor extends ASTVisitor {
public void endVisit(ArrayQualifiedTypeReference x, BlockScope scope) {
maybeDispatch(scope, x.resolvedType);
}
public void endVisit(ArrayQualifiedTypeReference x, ClassScope scope) {
maybeDispatch(scope, x.resolvedType);
}
public void endVisit(ArrayTypeReference x, BlockScope scope) {
maybeDispatch(scope, x.resolvedType);
}
public void endVisit(ArrayTypeReference x, ClassScope scope) {
maybeDispatch(scope, x.resolvedType);
}
public void endVisit(ParameterizedQualifiedTypeReference x, BlockScope scope) {
maybeDispatch(scope, x.resolvedType);
}
public void endVisit(ParameterizedQualifiedTypeReference x, ClassScope scope) {
maybeDispatch(scope, x.resolvedType);
}
public void endVisit(ParameterizedSingleTypeReference x, BlockScope scope) {
maybeDispatch(scope, x.resolvedType);
}
public void endVisit(ParameterizedSingleTypeReference x, ClassScope scope) {
maybeDispatch(scope, x.resolvedType);
}
public void endVisit(QualifiedTypeReference x, BlockScope scope) {
maybeDispatch(scope, x.resolvedType);
}
public void endVisit(QualifiedTypeReference x, ClassScope scope) {
maybeDispatch(scope, x.resolvedType);
}
public void endVisit(SingleTypeReference x, BlockScope scope) {
maybeDispatch(scope, x.resolvedType);
}
public void endVisit(SingleTypeReference x, ClassScope scope) {
maybeDispatch(scope, x.resolvedType);
}
public void endVisit(Wildcard x, BlockScope scope) {
maybeDispatch(scope, x.resolvedType);
}
public void endVisit(Wildcard x, ClassScope scope) {
maybeDispatch(scope, x.resolvedType);
}
protected abstract void onTypeRef(SourceTypeBinding referencedType,
CompilationUnitDeclaration unitOfReferrer);
private CompilationUnitScope findUnitScope(Scope referencedFrom) {
assert (referencedFrom != null);
Scope scope = referencedFrom;
while (scope.parent != null) {
scope = scope.parent;
}
assert (scope instanceof CompilationUnitScope);
return (CompilationUnitScope) scope;
}
private void maybeDispatch(Scope referencedFrom, TypeBinding binding) {
if (binding instanceof SourceTypeBinding) {
SourceTypeBinding type = (SourceTypeBinding) binding;
CompilationUnitScope from = findUnitScope(referencedFrom);
onTypeRef(type, from.referenceContext);
} else if (binding instanceof ArrayBinding) {
maybeDispatch(referencedFrom, ((ArrayBinding) binding).leafComponentType);
} else {
// We don't care about other cases.
}
}
}