/*
* 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.reflect.plugins.javassist;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import javassist.ClassPool;
import javassist.CtClass;
import javassist.CtField;
import javassist.CtMember;
import javassist.CtMethod;
import javassist.CtPrimitiveType;
import javassist.NotFoundException;
import org.jboss.reflect.plugins.AnnotationAttributeImpl;
import org.jboss.reflect.plugins.AnnotationHelper;
import org.jboss.reflect.plugins.AnnotationValueFactory;
import org.jboss.reflect.plugins.AnnotationValueImpl;
import org.jboss.reflect.plugins.EnumConstantInfoImpl;
import org.jboss.reflect.spi.AnnotationInfo;
import org.jboss.reflect.spi.AnnotationValue;
import org.jboss.reflect.spi.NumberInfo;
import org.jboss.reflect.spi.PrimitiveInfo;
import org.jboss.reflect.spi.TypeInfo;
import org.jboss.reflect.spi.TypeInfoFactory;
import org.jboss.util.JBossStringBuilder;
import org.jboss.util.collection.WeakClassCache;
/**
* A javassist type factory.
*
* @author <a href="mailto:adrian@jboss.org">Adrian Brock</a>
*/
public class JavassistTypeInfoFactoryImpl extends WeakClassCache implements TypeInfoFactory, AnnotationHelper
{
static final ClassPool pool = ClassPool.getDefault();
static final AnnotationValue[] NO_ANNOTATIONS = new AnnotationValue[0];
/**
* Raise NoClassDefFoundError for javassist not found
*
* @param name the name
* @param e the not found error
* @return never
* @throws NoClassDefFoundError always
*/
public static NoClassDefFoundError raiseClassNotFound(String name, NotFoundException e) throws NoClassDefFoundError
{
NoClassDefFoundError ex = new NoClassDefFoundError("Unable to find class " + name);
if (e.getCause() != null)
ex.initCause(e.getCause()); // Hide the javassist error
throw ex;
}
/**
* Raise NoClassDefFoundError for javassist not found
*
* @param name the name
* @param e the not found error
* @return never
* @throws NoClassDefFoundError always
*/
public static NoClassDefFoundError raiseClassNotFound(String name, ClassNotFoundException e) throws NoClassDefFoundError
{
NoClassDefFoundError ex = new NoClassDefFoundError("Unable to find class " + name);
ex.initCause(e);
throw ex;
}
/**
* Raise NoClassDefFoundError for javassist not found
*
* @param name the name
* @param e the not found error
* @return never
* @throws NoClassDefFoundError always
*/
public static NoClassDefFoundError raiseMethodNotFound(String name, NotFoundException e) throws NoClassDefFoundError
{
NoSuchMethodError ex = new NoSuchMethodError("Unable to find method " + name);
if (e.getCause() != null)
ex.initCause(e.getCause()); // Hide the javassist error
throw ex;
}
/**
* Raise NoClassDefFoundError for javassist not found
*
* @param name the name
* @param e the not found error
* @return never
* @throws NoClassDefFoundError always
*/
public static NoClassDefFoundError raiseFieldNotFound(String name, NotFoundException e) throws NoClassDefFoundError
{
NoSuchFieldError ex = new NoSuchFieldError("Unable to find field " + name);
if (e.getCause() != null)
ex.initCause(e.getCause()); // Hide the javassist error
throw ex;
}
@SuppressWarnings("unchecked")
protected Object instantiate(Class clazz)
{
try
{
CtClass ctClass = getCtClass(clazz.getName());
if (clazz.isArray())
{
TypeInfo componentType = getTypeInfo(clazz.getComponentType());
return new JavassistArrayInfoImpl(this, ctClass, clazz, componentType);
}
if (ctClass.isAnnotation())
{
JavassistAnnotationInfo result = new JavassistAnnotationInfo(this, ctClass, clazz);
CtMethod[] methods = ctClass.getDeclaredMethods();
AnnotationAttributeImpl[] atttributes = new AnnotationAttributeImpl[methods.length];
for (int i = 0 ; i < methods.length ; i++)
{
atttributes[i] = new AnnotationAttributeImpl(methods[i].getName(), getTypeInfo(methods[i].getReturnType()), null);
}
result.setAttributes(atttributes);
return result;
}
else if (ctClass.isEnum())
{
JavassistEnumInfo enumInfo = new JavassistEnumInfo(this, ctClass, clazz);
CtField[] fields = ctClass.getFields();
EnumConstantInfoImpl[] constants = new EnumConstantInfoImpl[fields.length];
int i = 0;
for (CtField field : fields)
{
AnnotationValue[] annotations = getAnnotations(field);
constants[i++] = new EnumConstantInfoImpl(field.getName(), enumInfo, annotations);
}
enumInfo.setEnumConstants(constants);
return enumInfo;
}
return new JavassistTypeInfo(this, ctClass, clazz);
}
catch (NotFoundException e)
{
throw new RuntimeException(e);
}
}
/**
* Get the type info
*
* @param ctClass the ctClass
* @return the typeinfo
*/
protected TypeInfo getTypeInfo(CtClass ctClass)
{
try
{
String name = convertName(ctClass);
return getTypeInfo(name, null);
}
catch (ClassNotFoundException e)
{
throw raiseClassNotFound(ctClass.getName(), e);
}
}
/**
* Convert name
*
* @param clazz the class
* @return the converted name
*/
protected String convertName(CtClass clazz)
{
CtClass temp = clazz;
if (temp.isArray())
{
JBossStringBuilder buffer = new JBossStringBuilder();
try
{
while (temp.isArray())
{
buffer.append('[');
temp = temp.getComponentType();
}
if (temp.isPrimitive())
{
CtPrimitiveType primitive = (CtPrimitiveType) temp;
buffer.append(Character.toString(primitive.getDescriptor()));
}
else
{
buffer.append('L');
buffer.append(temp.getName());
buffer.append(';');
}
return buffer.toString();
}
catch (NotFoundException e)
{
throw raiseClassNotFound(clazz.getName(), e);
}
}
return clazz.getName();
}
/**
* Get the CtClass
*
* @param name the name
* @return the CtClass
*/
protected CtClass getCtClass(String name)
{
try
{
return pool.get(name);
}
catch (NotFoundException e)
{
throw raiseClassNotFound(name, e);
}
}
@SuppressWarnings("unchecked")
protected void generate(Class clazz, Object result)
{
// Everything is done lazily
}
public TypeInfo getTypeInfo(Class<?> clazz)
{
if (clazz == null)
throw new IllegalArgumentException("Null class");
TypeInfo primitive = PrimitiveInfo.valueOf(clazz.getName());
if (primitive != null)
return primitive;
NumberInfo number = NumberInfo.valueOf(clazz.getName());
if (number != null)
{
synchronized (number)
{
if (number.getPhase() != NumberInfo.Phase.INITIALIZING)
{
if (number.getPhase() != NumberInfo.Phase.COMPLETE)
{
number.initializing();
number.setDelegate((TypeInfo)get(clazz));
}
return number;
}
}
}
return (TypeInfo) get(clazz);
}
public TypeInfo getTypeInfo(String name, ClassLoader cl) throws ClassNotFoundException
{
if (name == null)
throw new IllegalArgumentException("Null class name");
if (cl == null)
cl = Thread.currentThread().getContextClassLoader();
TypeInfo primitive = PrimitiveInfo.valueOf(name);
if (primitive != null)
return primitive;
NumberInfo number = NumberInfo.valueOf(name);
if (number != null)
{
synchronized (number)
{
if (number.getPhase() != NumberInfo.Phase.INITIALIZING)
{
if (number.getPhase() != NumberInfo.Phase.COMPLETE)
{
number.initializing();
number.setDelegate((TypeInfo)get(Class.forName(name, false, cl)));
}
return number;
}
}
}
Class<?> clazz = Class.forName(name, false, cl);
return getTypeInfo(clazz);
}
public TypeInfo getTypeInfo(Type type)
{
if (type instanceof Class)
return getTypeInfo((Class<?>) type);
// TODO JBMICROCONT-129 getTypeInfo + NumberInfo
throw new org.jboss.util.NotImplementedException("getTypeInfo");
}
public AnnotationValue[] getAnnotations(Object obj)
{
try
{
Object[] annotations;
if (obj instanceof CtMember)
{
annotations = ((CtMember)obj).getAvailableAnnotations();
}
else if (obj instanceof CtClass)
{
annotations = ((CtClass)obj).getAvailableAnnotations();
}
else
{
throw new RuntimeException("Attempt was made to read annotations from unsupported type " + obj.getClass().getName() + ": " + obj);
}
if (annotations.length == 0)
{
return NO_ANNOTATIONS;
}
AnnotationValue[] annotationValues = new AnnotationValueImpl[annotations.length];
for (int i = 0 ; i < annotations.length ; i++)
{
Class<?> clazz = ((Annotation)annotations[i]).annotationType();
AnnotationInfo info = (AnnotationInfo)getTypeInfo(clazz);
annotationValues[i] = AnnotationValueFactory.createAnnotationValue(this, this, info, annotations[i]);
}
return annotationValues;
}
// catch (ClassNotFoundException e)
// {
// throw new RuntimeException(e);
// }
catch (Throwable t)
{
throw new RuntimeException(t);
}
}
public AnnotationValue createAnnotationValue(AnnotationInfo info, Object ann)
{
return AnnotationValueFactory.createAnnotationValue(this, this, info, ann);
}
}