org.jboss.reflect.plugins.javassist.JavassistUtil Maven / Gradle / Ivy
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/*
* 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.reflect.Array;
import javassist.CannotCompileException;
import javassist.ClassPool;
import javassist.CtClass;
import javassist.CtConstructor;
import javassist.CtField;
import javassist.CtMethod;
import javassist.CtPrimitiveType;
import javassist.NotFoundException;
import org.jboss.reflect.spi.ClassInfo;
import org.jboss.reflect.spi.TypeInfo;
import org.jboss.util.Classes;
import org.jboss.util.JBossStringBuilder;
/**
* A JavassistUtil.
*
* @author Stale W. Pedersen
* @author Kabir Khan
* @version $Revision: 1.1 $
*/
public class JavassistUtil
{
public static Class ctClassToClass(CtClass ct)
{
if(ct.isModified() && !ct.isFrozen())
{
try
{
return ct.toClass();
}
catch (CannotCompileException e)
{
throw new org.jboss.reflect.spi.CannotCompileException(e.toString());
}
}
try
{
if (ct.isArray())
{
int dim = 0;
while (ct.getComponentType() != null)
{
dim++;
ct = ct.getComponentType();
}
if (ct.isPrimitive())
{
StringBuilder sb = new StringBuilder();
for (int i = 0 ; i < dim ; i++)
{
sb.append("[");
}
sb.append(((CtPrimitiveType)ct).getDescriptor());
try
{
return getClassLoader(ct).loadClass(sb.toString());
}
catch(ClassNotFoundException cnfe)
{
return Class.forName(sb.toString(), false, getClassLoader(ct));
}
}
else
{
return Array.newInstance(ctClassToClass(ct), new int[dim]).getClass();
}
}
else
{
return getClassLoader(ct).loadClass(ct.getName());
}
}
catch (NotFoundException e)
{
throw new org.jboss.reflect.spi.NotFoundException(e.toString());
}
catch (ClassNotFoundException e)
{
try
{
return ct.toClass();
}
catch (CannotCompileException e1)
{
throw new org.jboss.reflect.spi.CannotCompileException(e1.toString());
}
}
}
public static CtClass toCtClass(ClassPool pool, String name)
{
try
{
return pool.get(name);
}
catch (NotFoundException e)
{
throw new org.jboss.reflect.spi.NotFoundException(e.toString());
}
}
public static CtClass[] toCtClass(ClassPool pool, String[] names)
{
if(names == null)
return new CtClass[0];
CtClass[] classes = new CtClass[names.length];
for(int i=0; i < names.length; i++)
{
classes[i] = toCtClass(pool, names[i]);
}
return classes;
}
public static CtClass toCtClass(ClassInfo clazz)
{
if(clazz instanceof JavassistTypeInfo)
return ((JavassistTypeInfo) clazz).getCtClass();
else
{
try
{
ClassLoader classLoader = clazz.getClassLoader();
ClassPool classPool = JavassistTypeInfoFactoryImpl.getPoolFactory().getPoolForLoader(classLoader);
return classPool.get(clazz.getName());
}
catch (NotFoundException e)
{
throw new org.jboss.reflect.spi.NotFoundException(e.toString());
}
}
}
public static TypeInfo toTypeInfo(CtClass ctClass)
{
JavassistTypeInfoFactoryImpl impl = JavassistTypeInfoFactory.delegate;
return impl.get(ctClass);
}
public static CtClass[] toCtClass(ClassInfo[] classes)
{
CtClass[] clazzes = new CtClass[classes.length];
for(int i=0; i < classes.length; i++)
{
clazzes[i] = toCtClass(classes[i]);
}
return clazzes;
}
public static ClassLoader getClassLoader(CtClass ctClass)
{
ClassPool pool = ctClass.getClassPool();
ClassLoader loader = null;
if (pool != null)
loader = pool.getClassLoader();
if (loader == null)
loader = SecurityActions.getContextClassLoader();
return loader;
}
public static String getSignature(CtConstructor ctor)
{
return ctor.getDeclaringClass().getName() + ctor.getSignature();
}
public static String getSignature(CtMethod method)
{
return method.getDeclaringClass().getName() + "." + method.getName() + method.getSignature();
}
public static String getSignature(CtField field)
{
return field.getDeclaringClass().getName() + "." + field.getName();
}
private static Class loadClass(ClassLoader cl, CtClass ctClass)
{
if (ctClass.isPrimitive())
{
return getPrimitiveClass(ctClass);
}
else if (ctClass.isArray())
{
JBossStringBuilder buffer = new JBossStringBuilder();
try
{
CtClass temp = ctClass;
int dims = 0;
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 Classes.loadClass(buffer.toString(), cl);
}
catch (NotFoundException e)
{
throw new RuntimeException(ctClass.getName(), e);
}
catch (ClassNotFoundException e)
{
throw new RuntimeException(buffer.toString() + " not found in " + cl);
}
}
try
{
return cl.loadClass(ctClass.getName());
//TODO might need to check if the class is being generated in which case we should call ctClassToClass?
}
catch (ClassNotFoundException e)
{
throw new RuntimeException(ctClass.getName() + " not found in " + cl);
}
}
private static Class getPrimitiveClass(CtClass ctClass)
{
if (!ctClass.isPrimitive())
throw new IllegalArgumentException("Not a primitive ");
if (ctClass == CtClass.booleanType)
return Boolean.TYPE;
else if (ctClass == CtClass.byteType)
return Byte.TYPE;
else if (ctClass == CtClass.charType)
return Character.TYPE;
else if (ctClass == CtClass.doubleType)
return Double.TYPE;
else if (ctClass == CtClass.floatType)
return Float.TYPE;
else if (ctClass == CtClass.intType)
return Integer.TYPE;
else if (ctClass == CtClass.longType)
return Long.TYPE;
else if (ctClass == CtClass.shortType)
return Short.TYPE;
return null;
}
}