/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.ws.core.utils;
import javassist.CtClass;
import javassist.CtField;
import javassist.CtMethod;
import javassist.bytecode.AnnotationsAttribute;
import javassist.bytecode.ClassFile;
import javassist.bytecode.ConstPool;
import javassist.bytecode.FieldInfo;
import javassist.bytecode.MethodInfo;
import javassist.bytecode.SignatureAttribute;
import javassist.bytecode.annotation.ArrayMemberValue;
import javassist.bytecode.annotation.EnumMemberValue;
import javassist.bytecode.annotation.StringMemberValue;
/**
* Utility functions that simplify Javassist.
*
* @author <a href="mailto:jason.greene@jboss.com">Jason T. Greene</a>
* @version $Revision: 1757 $
*/
public class JavassistUtils
{
public static void addFieldAnnotation(CtField field, javassist.bytecode.annotation.Annotation annotation)
{
FieldInfo fieldInfo = field.getFieldInfo();
AnnotationsAttribute attribute = (AnnotationsAttribute) fieldInfo.getAttribute(AnnotationsAttribute.visibleTag);
if (attribute == null)
attribute = new AnnotationsAttribute(fieldInfo.getConstPool(), AnnotationsAttribute.visibleTag);
attribute.addAnnotation(annotation);
fieldInfo.addAttribute(attribute);
}
public static void addClassAnnotation(CtClass clazz, javassist.bytecode.annotation.Annotation annotation)
{
ClassFile classFile = clazz.getClassFile();
AnnotationsAttribute attribute = (AnnotationsAttribute) classFile.getAttribute(AnnotationsAttribute.visibleTag);
if (attribute == null)
attribute = new AnnotationsAttribute(classFile.getConstPool(), AnnotationsAttribute.visibleTag);
attribute.addAnnotation(annotation);
classFile.addAttribute(attribute);
}
public static Annotation createAnnotation(Class<? extends java.lang.annotation.Annotation> annotation, ConstPool constPool)
{
return new Annotation(annotation, constPool);
}
public static void addSignature(CtField field, String signature)
{
FieldInfo fieldInfo = field.getFieldInfo();
ConstPool constPool = fieldInfo.getConstPool();
SignatureAttribute signatureAttribute = new SignatureAttribute(constPool, signature);
fieldInfo.addAttribute(signatureAttribute);
}
public static void addSignature(CtMethod method, String signature)
{
MethodInfo methodInfo = method.getMethodInfo();
ConstPool constPool = methodInfo.getConstPool();
SignatureAttribute signatureAttribute = new SignatureAttribute(constPool, signature);
methodInfo.addAttribute(signatureAttribute);
}
public static class Annotation
{
private javassist.bytecode.annotation.Annotation annotation;
private ConstPool constPool;
public Annotation(Class<? extends java.lang.annotation.Annotation> annotation, ConstPool constPool)
{
this.annotation = new javassist.bytecode.annotation.Annotation(annotation.getName(), constPool);
this.constPool = constPool;
}
public void addParameter(String name, String value)
{
annotation.addMemberValue(name, new StringMemberValue(value, constPool));
}
public void addParameter(String name, Enum value)
{
EnumMemberValue enumValue = new EnumMemberValue(constPool);
enumValue.setType(value.getClass().getName());
enumValue.setValue(value.name());
annotation.addMemberValue(name, enumValue);
}
public void addParameter(String name, String[] values)
{
ArrayMemberValue member = new ArrayMemberValue(constPool);
StringMemberValue[] members = new StringMemberValue[values.length];
for (int i = 0; i < values.length; i++)
members[i] = new StringMemberValue(values[i], constPool);
member.setValue(members);
annotation.addMemberValue(name, member);
}
public void markClass(CtClass clazz)
{
addClassAnnotation(clazz, annotation);
}
public void markField(CtField field)
{
addFieldAnnotation(field, annotation);
}
}
}