JdbcMapper/beehive-netui-core/src/main/java/org/apache/beehive/netui/pageflow/internal/XmlBeanActionForm.java

111 lines
3.7 KiB
Java

/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* $Header:$
*/
package org.apache.beehive.netui.pageflow.internal;
import org.apache.beehive.netui.pageflow.config.PageFlowActionMapping;
import org.apache.beehive.netui.util.logging.Logger;
import org.apache.struts.action.ActionMapping;
import javax.servlet.http.HttpServletRequest;
import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
public class XmlBeanActionForm extends AnyBeanActionForm
{
private static final Logger _log = Logger.getInstance( XmlBeanActionForm.class );
private String _formClassName;
public XmlBeanActionForm()
{
}
public XmlBeanActionForm( Object xml )
{
setBean( xml );
}
public String getXmlString()
{
Object xmlBean = getBean();
if ( xmlBean == null) return null;
try
{
return ( String ) xmlBean.getClass().getMethod( "xmlText", null ).invoke( xmlBean, null );
}
catch ( InvocationTargetException e )
{
_log.error( "Error while getting XML String", e.getCause() );
}
catch ( Exception e )
{
assert e instanceof NoSuchMethodException || e instanceof IllegalAccessException : e.getClass().getName();
_log.error( "Error while getting XML String", e );
}
return null;
}
public void setXmlString( String xml )
{
assert _formClassName != null;
setBean( invokeFactoryMethod( "parse", new Class[]{ String.class }, new Object[]{ xml } ) );
}
public void reset( ActionMapping mapping, HttpServletRequest request )
{
if ( _formClassName == null )
{
assert mapping instanceof PageFlowActionMapping : mapping.getClass().getName();
_formClassName = ( ( PageFlowActionMapping ) mapping ).getFormClass();
assert _formClassName != null;
}
if ( getBean() == null )
{
setBean( invokeFactoryMethod( "newInstance", new Class[0], new Object[0] ) );
}
}
private Object invokeFactoryMethod( String methodName, Class[] argTypes, Object[] args )
{
String factoryClassName = _formClassName + "$Factory";
try
{
Class factoryClass = Class.forName( factoryClassName );
Method newInstanceMethod = factoryClass.getMethod( methodName, argTypes );
return newInstanceMethod.invoke( factoryClass, args );
}
catch ( Exception e )
{
// Can be any exception -- not just the reflection-related exceptions...
// because the exception could be thrown while creating the XML bean.
if ( _log.isErrorEnabled() )
{
_log.error( "Error while creating XML object of type " + _formClassName, e );
}
return null;
}
}
}