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/*
* Javassist, a Java-bytecode translator toolkit.
* Copyright (C) 2004 Bill Burke. All Rights Reserved.
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. Alternatively, the contents of this file may be used under
* the terms of the GNU Lesser General Public License Version 2.1 or later,
* or the Apache License Version 2.0.
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*/
package javassist.bytecode.annotation;
import java.io.IOException;
import java.lang.reflect.Method;
import javassist.ClassPool;
import javassist.bytecode.ConstPool;
import javassist.bytecode.Descriptor;
/**
* The value of a member declared in an annotation.
*
* @see Annotation#getMemberValue(String)
* @author <a href="mailto:bill@jboss.org">Bill Burke</a>
* @author Shigeru Chiba
*/
public abstract class MemberValue {
ConstPool cp;
char tag;
MemberValue(char tag, ConstPool cp) {
this.cp = cp;
this.tag = tag;
}
/**
* Returns the value. If the value type is a primitive type, the
* returned value is boxed.
*/
abstract Object getValue(ClassLoader cl, ClassPool cp, Method m)
throws ClassNotFoundException;
abstract Class<?> getType(ClassLoader cl) throws ClassNotFoundException;
static Class<?> loadClass(ClassLoader cl, String classname)
throws ClassNotFoundException, NoSuchClassError
{
try {
return Class.forName(convertFromArray(classname), true, cl);
}
catch (LinkageError e) {
throw new NoSuchClassError(classname, e);
}
}
private static String convertFromArray(String classname)
{
int index = classname.indexOf("[]");
if (index != -1) {
String rawType = classname.substring(0, index);
StringBuffer sb = new StringBuffer(Descriptor.of(rawType));
while (index != -1) {
sb.insert(0, "[");
index = classname.indexOf("[]", index + 1);
}
return sb.toString().replace('/', '.');
}
return classname;
}
/**
* Accepts a visitor.
*/
public abstract void accept(MemberValueVisitor visitor);
/**
* Writes the value.
*/
public abstract void write(AnnotationsWriter w) throws IOException;
}
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