/* *******************************************************************
* Copyright (c) 2005 Contributors.
* 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://eclipse.org/legal/epl-v10.html
*
* Contributors:
* Adrian Colyer Initial implementation
* ******************************************************************/
package org.aspectj.weaver.reflect;
import java.lang.reflect.GenericArrayType;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.lang.reflect.WildcardType;
import java.util.HashMap;
import java.util.Map;
import org.aspectj.weaver.BoundedReferenceType;
import org.aspectj.weaver.ReferenceType;
import org.aspectj.weaver.ResolvedType;
import org.aspectj.weaver.TypeFactory;
import org.aspectj.weaver.TypeVariable;
import org.aspectj.weaver.TypeVariableReferenceType;
import org.aspectj.weaver.UnresolvedType;
import org.aspectj.weaver.World;
/**
* Handles the translation of java.lang.reflect.Type objects into AspectJ UnresolvedTypes.
*
*/
public class JavaLangTypeToResolvedTypeConverter {
// Used to prevent recursion - we record what we are working on and return it if asked again *whilst* working on it
private Map<Type, TypeVariableReferenceType> typeVariablesInProgress = new HashMap<Type, TypeVariableReferenceType>();
private final World world;
public JavaLangTypeToResolvedTypeConverter(World aWorld) {
this.world = aWorld;
}
private World getWorld() {
return this.world;
}
public ResolvedType fromType(Type aType) {
if (aType instanceof Class) {
Class clazz = (Class) aType;
String name = clazz.getName();
/**
* getName() can return:
*
* 1. If this class object represents a reference type that is not an array type then the binary name of the class is
* returned 2. If this class object represents a primitive type or void, then the name returned is a String equal to the
* Java language keyword corresponding to the primitive type or void. 3. If this class object represents a class of
* arrays, then the internal form of the name consists of the name of the element type preceded by one or more '['
* characters representing the depth of the array nesting.
*/
if (clazz.isArray()) {
UnresolvedType ut = UnresolvedType.forSignature(name.replace('.', '/'));
return getWorld().resolve(ut);
} else {
return getWorld().resolve(name);
}
} else if (aType instanceof ParameterizedType) {
ParameterizedType pt = (ParameterizedType) aType;
ResolvedType baseType = fromType(pt.getRawType());
Type[] args = pt.getActualTypeArguments();
ResolvedType[] resolvedArgs = fromTypes(args);
/* StringBuilder sb = new StringBuilder();
for (int i = 0; i < resolvedArgs.length; i++) {
sb.append(resolvedArgs[i]).append(" ");
}
for (int i = 0; i < resolvedArgs.length; i++) {
if (resolvedArgs[i] == null) {
String ss = "";
try {
ss = aType.toString();
} catch (Exception e) {
}
throw new IllegalStateException("Parameterized type problem. basetype=" + baseType + " arguments="
+ sb.toString() + " ss=" + ss);
}
}
*/
return TypeFactory.createParameterizedType(baseType, resolvedArgs, getWorld());
} else if (aType instanceof java.lang.reflect.TypeVariable) {
if (typeVariablesInProgress.get(aType) != null) {
return typeVariablesInProgress.get(aType);
}
java.lang.reflect.TypeVariable tv = (java.lang.reflect.TypeVariable) aType;
TypeVariable rt_tv = new TypeVariable(tv.getName());
TypeVariableReferenceType tvrt = new TypeVariableReferenceType(rt_tv, getWorld());
typeVariablesInProgress.put(aType, tvrt); // record what we are working on, for recursion case
Type[] bounds = tv.getBounds();
ResolvedType[] resBounds = fromTypes(bounds);
ResolvedType upperBound = resBounds[0];
ResolvedType[] additionalBounds = new ResolvedType[0];
if (resBounds.length > 1) {
additionalBounds = new ResolvedType[resBounds.length - 1];
System.arraycopy(resBounds, 1, additionalBounds, 0, additionalBounds.length);
}
rt_tv.setUpperBound(upperBound);
rt_tv.setAdditionalInterfaceBounds(additionalBounds);
typeVariablesInProgress.remove(aType); // we have finished working on it
return tvrt;
} else if (aType instanceof WildcardType) {
WildcardType wildType = (WildcardType) aType;
Type[] lowerBounds = wildType.getLowerBounds();
Type[] upperBounds = wildType.getUpperBounds();
ResolvedType bound = null;
boolean isExtends = lowerBounds.length == 0;
if (isExtends) {
bound = fromType(upperBounds[0]);
} else {
bound = fromType(lowerBounds[0]);
}
return new BoundedReferenceType((ReferenceType) bound, isExtends, getWorld());
} else if (aType instanceof GenericArrayType) {
GenericArrayType gt = (GenericArrayType) aType;
Type componentType = gt.getGenericComponentType();
return UnresolvedType.makeArray(fromType(componentType), 1).resolve(getWorld());
}
return ResolvedType.MISSING;
}
public ResolvedType[] fromTypes(Type[] types) {
ResolvedType[] ret = new ResolvedType[types.length];
for (int i = 0; i < ret.length; i++) {
ret[i] = fromType(types[i]);
}
return ret;
}
}