/*
* 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.kernel.plugins.config.xml;
import java.security.AccessController;
import java.security.PrivilegedExceptionAction;
import java.util.Iterator;
import java.util.Set;
import javax.xml.namespace.NamespaceContext;
import javax.xml.namespace.QName;
import org.jboss.beans.info.spi.BeanInfo;
import org.jboss.beans.info.spi.PropertyInfo;
import org.jboss.kernel.plugins.config.Configurator;
import org.jboss.kernel.plugins.config.property.PropertyKernelConfig;
import org.jboss.kernel.spi.config.KernelConfig;
import org.jboss.reflect.plugins.introspection.IntrospectionTypeInfoFactory;
import org.jboss.reflect.spi.MethodInfo;
import org.jboss.reflect.spi.TypeInfo;
import org.jboss.reflect.spi.TypeInfoFactory;
import org.jboss.util.propertyeditor.PropertyEditors;
import org.jboss.xb.binding.sunday.unmarshalling.DefaultElementHandler;
import org.jboss.xb.binding.sunday.unmarshalling.DefaultElementInterceptor;
import org.jboss.xb.binding.sunday.unmarshalling.ElementBinding;
import org.jboss.xb.binding.sunday.unmarshalling.SchemaBinding;
import org.jboss.xb.binding.sunday.unmarshalling.SchemaBindingInitializer;
import org.jboss.xb.binding.sunday.unmarshalling.TypeBinding;
import org.xml.sax.Attributes;
/**
* JavaBeanSchemaInitializer.
*
* @author <a href="adrian@jboss.com">Adrian Brock</a>
* @version $Revision: 57307 $
*/
public class JavaBeanSchemaInitializer implements SchemaBindingInitializer
{
/** The kernel config */
private static final KernelConfig config;
/** The type info factory */
protected static final TypeInfoFactory typeInfoFactory = new IntrospectionTypeInfoFactory();
/** The namespace */
private static final String JAVABEAN_NS = "urn:jboss:javabean:1.0";
/** The javabean binding */
private static final QName javabeanTypeQName = new QName(JAVABEAN_NS, "javabeanType");
/** The property binding */
private static final QName propertyTypeQName = new QName(JAVABEAN_NS, "propertyType");
/** The property element name */
private static final QName propertyQName = new QName(JAVABEAN_NS, "property");
static
{
try
{
config = AccessController.doPrivileged(new PrivilegedExceptionAction<KernelConfig>()
{
public KernelConfig run() throws Exception
{
return new PropertyKernelConfig(System.getProperties());
}
});
}
catch (RuntimeException e)
{
throw e;
}
catch (Exception e)
{
throw new RuntimeException("Error getting configuration", e);
}
PropertyEditors.init();
}
public SchemaBinding init(SchemaBinding schema)
{
// javabean binding
TypeBinding beanType = schema.getType(javabeanTypeQName);
beanType.setHandler(new DefaultElementHandler()
{
public Object startElement(Object parent, QName name, ElementBinding element)
{
return new Holder();
}
public void attributes(Object o, QName elementName, ElementBinding element, Attributes attrs, NamespaceContext nsCtx)
{
Holder holder = (Holder) o;
String className = null;
for (int i = 0; i < attrs.getLength(); ++i)
{
String localName = attrs.getLocalName(i);
if ("class".equals(localName))
className = attrs.getValue(i);
}
if (className == null)
throw new IllegalArgumentException("No class attribute for " + elementName);
try
{
BeanInfo beanInfo = config.getBeanInfo(className, Thread.currentThread().getContextClassLoader());
Object object = Configurator.instantiate(config, beanInfo, null);
holder.setValue(object);
}
catch (RuntimeException e)
{
throw e;
}
catch (Error e)
{
throw e;
}
catch (Throwable t)
{
throw new RuntimeException("Error instantiating class " + className, t);
}
}
public Object endElement(Object o, QName qName, ElementBinding element)
{
Holder holder = (Holder) o;
return holder.getValue();
}
});
// bean has properties
beanType.pushInterceptor(propertyQName, new DefaultElementInterceptor()
{
public void add(Object parent, Object child, QName name)
{
Holder holder = (Holder) parent;
Object parentValue = holder.getValue();
Property prop = (Property) child;
String property = prop.getProperty();
MethodInfo method;
Object value = prop.getValue();
try
{
PropertyInfo info = getProperty(parentValue, property);
value = convertValue(info, prop.getType(), value);
method = info.getSetter();
method.invoke(parentValue, new Object[] { value });
}
catch (RuntimeException e)
{
throw e;
}
catch (Error e)
{
throw e;
}
catch (Throwable t)
{
throw new RuntimeException("Error setting property " + property + " on object" + parentValue + " with value " + value, t);
}
}
});
// property binding
TypeBinding propertyType = schema.getType(propertyTypeQName);
propertyType.setHandler(new DefaultElementHandler()
{
public Object startElement(Object parent, QName name, ElementBinding element)
{
return new Property();
}
public void attributes(Object o, QName elementName, ElementBinding element, Attributes attrs, NamespaceContext nsCtx)
{
Property property = (Property) o;
for (int i = 0; i < attrs.getLength(); ++i)
{
String localName = attrs.getLocalName(i);
if ("name".equals(localName))
property.setProperty(attrs.getValue(i));
else if ("class".equals(localName))
property.setType(attrs.getValue(i));
}
}
});
return schema;
}
private PropertyInfo getProperty(Object parent, String property) throws Throwable
{
BeanInfo beanInfo = config.getBeanInfo(parent.getClass());
Set properties = beanInfo.getProperties();
if (properties != null && properties.size() > 0)
{
for (Iterator i = properties.iterator(); i.hasNext();)
{
PropertyInfo prop = (PropertyInfo) i.next();
if (prop.getName().equals(property))
{
if (prop.getSetter() == null)
throw new IllegalArgumentException("Property '" + property + "' is read only " + prop);
return prop;
}
}
}
throw new IllegalArgumentException("No property '" + property + "' for " + beanInfo);
}
/**
* Convert a value
*
* @param info the property info
* @param override the override class
* @param value the value
* @return the converted value
* @throws Throwable for any error
*/
private Object convertValue(PropertyInfo info, String override, Object value) throws Throwable
{
TypeInfo type = info.getType();
if (override != null)
type = typeInfoFactory.getTypeInfo(override, null);
return type.convertValue(value);
}
public static class Holder
{
private Object object;
public Holder()
{
}
public Object getValue()
{
return object;
}
public void setValue(Object object)
{
this.object = object;
}
}
public static class Property extends Holder
{
private String property;
private String type;
public Property()
{
}
public String getProperty()
{
return property;
}
public void setProperty(String property)
{
this.property = property;
}
public String getType()
{
return type;
}
public void setType(String type)
{
this.type = type;
}
}
}