/*
* JBoss, Home of Professional Open Source
* Copyright 2006, 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.metadata.spi.signature.javassist;
import javassist.CtConstructor;
import javassist.CtField;
import javassist.CtMember;
import javassist.CtMethod;
import javassist.NotFoundException;
import javassist.CtClass;
import javassist.CtPrimitiveType;
import org.jboss.metadata.spi.signature.Signature;
/**
* Javassist Signature factory.
*
* @author <a href="ales.justin@jboss.com">Ales Justin</a>
*/
public class JavassistSignatureFactory
{
/**
* Get a signature for a member
*
* @param member the member
* @return the result
*/
public static Signature getSignature(CtMember member)
{
if (member == null)
throw new IllegalArgumentException("Null member");
try
{
if (member instanceof CtMethod)
{
CtMethod method = CtMethod.class.cast(member);
return new JavassistMethodSignature(method);
}
if (member instanceof CtField)
{
CtField field = CtField.class.cast(member);
return new JavassistFieldSignature(field);
}
if (member instanceof CtConstructor)
{
CtConstructor constructor = CtConstructor.class.cast(member);
return new JavassistConstructorSignature(constructor);
}
}
catch (NotFoundException e)
{
throw raiseClassNotFound("member", member.toString(), e);
}
throw new IllegalArgumentException("Unknown member: " + member);
}
/**
* Convert ct classes to string class names.
*
* @param classes the classes
* @return class names
*/
public static String[] convertParameters(CtClass[] classes)
{
if (classes == null || classes.length == 0)
return Signature.NO_PARAMETERS;
String[] paramTypes = new String[classes.length];
for (int i = 0; i < classes.length; ++i)
paramTypes[i] = convertName(classes[i]);
return paramTypes;
}
/**
* Convert ct class to full classname.
*
* @param clazz the ct class
* @return class name
*/
protected static String convertName(CtClass clazz)
{
if (clazz == null)
throw new IllegalArgumentException("Null CtClass");
CtClass temp = clazz;
if (temp.isArray())
{
StringBuilder buffer = new StringBuilder();
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("class", clazz.getName(), e);
}
}
return clazz.getName();
}
/**
* Raise NCDFE exception.
*
* @param type the error type
* @param info the info
* @param e javassist exception
* @return NCDFE instance
* @throws NoClassDefFoundError transform e param into NCDFE
*/
protected static NoClassDefFoundError raiseClassNotFound(String type, String info, NotFoundException e) throws NoClassDefFoundError
{
NoClassDefFoundError ex = new NoClassDefFoundError("Unable to find " + type + ": " + info);
if (e.getCause() != null)
ex.initCause(e.getCause()); // Hide the javassist error
throw ex;
}
}