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/* *******************************************************************
* 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.internal.lang.reflect;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;
import java.util.StringTokenizer;
import org.aspectj.lang.reflect.AjTypeSystem;
/**
* @author colyer
* Helper class for converting type representations in Strings into java.lang.reflect.Types.
*/
public class StringToType {
public static Type[] commaSeparatedListToTypeArray(String typeNames, Class classScope)
throws ClassNotFoundException {
StringTokenizer strTok = new StringTokenizer(typeNames,",");
Type[] ret = new Type[strTok.countTokens()];
int index = 0;
//outer:
while (strTok.hasMoreTokens()) {
String typeName = strTok.nextToken().trim();
ret[index++] = stringToType(typeName, classScope);
}
return ret;
}
public static Type stringToType(String typeName, Class classScope)
throws ClassNotFoundException {
try {
if (typeName.indexOf("<") == -1) {
return AjTypeSystem.getAjType(Class.forName(typeName,false,classScope.getClassLoader()));
} else {
return makeParameterizedType(typeName,classScope);
}
} catch (ClassNotFoundException e) {
// could be a type variable
TypeVariable[] tVars = classScope.getTypeParameters();
for (int i = 0; i < tVars.length; i++) {
if (tVars[i].getName().equals(typeName)) {
return tVars[i];
}
}
throw new ClassNotFoundException(typeName);
}
}
private static Type makeParameterizedType(String typeName, Class classScope)
throws ClassNotFoundException {
int paramStart = typeName.indexOf('<');
String baseName = typeName.substring(0, paramStart);
final Class baseClass = Class.forName(baseName,false,classScope.getClassLoader());
int paramEnd = typeName.lastIndexOf('>');
String params = typeName.substring(paramStart+1,paramEnd);
final Type[] typeParams = commaSeparatedListToTypeArray(params,classScope);
return new ParameterizedType() {
public Type[] getActualTypeArguments() {
return typeParams;
}
public Type getRawType() {
return baseClass;
}
public Type getOwnerType() {
return baseClass.getEnclosingClass();
}
};
}
}