/*
* 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.beans.metadata.plugins;
import java.util.Stack;
import org.jboss.beans.metadata.spi.BeanMetaData;
import org.jboss.beans.metadata.spi.MetaDataVisitor;
import org.jboss.beans.metadata.spi.MetaDataVisitorNode;
import org.jboss.beans.metadata.spi.PropertyMetaData;
import org.jboss.dependency.spi.ControllerState;
import org.jboss.joinpoint.spi.TargettedJoinpoint;
import org.jboss.kernel.plugins.config.Configurator;
import org.jboss.kernel.spi.config.KernelConfigurator;
import org.jboss.kernel.spi.dependency.KernelController;
import org.jboss.kernel.spi.dependency.KernelControllerContext;
import org.jboss.reflect.spi.ClassInfo;
import org.jboss.util.JBossStringBuilder;
/**
* A typed value.
*
* @author <a href="adrian@jboss.com">Adrian Brock</a>
* @version $Revision: 58417 $
*/
public abstract class AbstractTypeMetaData extends AbstractValueMetaData
{
/**
* The type
*/
protected String type;
/**
* The configurator
*/
protected KernelController controller;
/**
* The configurator
*/
protected KernelConfigurator configurator;
/**
* The property name
*/
protected String propertyName;
/**
* The bean name
*/
protected String beanName;
/**
* Create a new typed value
*/
public AbstractTypeMetaData()
{
}
/**
* Create a new typed value
*
* @param value the value
*/
public AbstractTypeMetaData(String value)
{
super(value);
}
/**
* Set the type
*
* @param type the type
*/
public void setType(String type)
{
this.type = type;
}
public String getType()
{
return type;
}
public void initialVisit(MetaDataVisitor visitor)
{
controller = (KernelController) visitor.getControllerContext().getController();
configurator = visitor.getControllerContext().getKernel().getConfigurator();
preparePreinstantiatedLookup(visitor);
visitor.initialVisit(this);
}
private void preparePreinstantiatedLookup(MetaDataVisitor visitor)
{
Stack<MetaDataVisitorNode> visitorNodes = visitor.visitorNodeStack();
// pop it so that we can get to grand parent for more info
MetaDataVisitorNode parent = visitorNodes.pop();
try
{
if (parent instanceof PropertyMetaData)
{
PropertyMetaData pmd = (PropertyMetaData) parent;
propertyName = pmd.getName();
Object gp = visitorNodes.peek();
if (gp instanceof BeanMetaData)
{
BeanMetaData bmd = (BeanMetaData) gp;
beanName = bmd.getName();
}
}
}
finally
{
visitorNodes.push(parent);
}
}
@SuppressWarnings("unchecked")
protected Object preinstantiatedLookup(ClassLoader cl, Class expected)
{
Object result = null;
if (propertyName != null && beanName != null)
{
try
{
KernelControllerContext context = (KernelControllerContext) controller.getContext(beanName, ControllerState.INSTANTIATED);
TargettedJoinpoint joinpoint = configurator.getPropertyGetterJoinPoint(context.getBeanInfo(), propertyName);
joinpoint.setTarget(context.getTarget());
result = joinpoint.dispatch();
}
catch (Throwable t)
{
log.warn("Exception in preinstantiated lookup: " + t);
}
if (result != null && expected != null && expected.isAssignableFrom(result.getClass()) == false)
throw new ClassCastException(result.getClass() + " is not a " + expected.getName());
}
return result;
}
/**
* Set the configurator
*
* @param configurator the configurator
*/
public void setConfigurator(KernelConfigurator configurator)
{
this.configurator = configurator;
}
public void toString(JBossStringBuilder buffer)
{
super.toString(buffer);
if (type != null)
buffer.append(" type=").append(type);
}
/**
* Get the class info for this type
*
* @param cl classloader
* @return the class info
* @throws Throwable for any error
*/
protected ClassInfo getClassInfo(ClassLoader cl) throws Throwable
{
return getClassInfo(type, cl);
}
protected ClassInfo getClassInfo(String classType, ClassLoader cl) throws Throwable
{
if (classType == null)
return null;
return configurator.getClassInfo(classType, cl);
}
protected Class getClass(MetaDataVisitor visitor, String classType) throws Throwable
{
KernelControllerContext context = visitor.getControllerContext();
ClassLoader cl = Configurator.getClassLoader(context.getBeanMetaData());
return getClassInfo(classType, cl).getType();
}
}