/*
* This file is part of the Echo Web Application Framework (hereinafter "Echo").
* Copyright (C) 2002-2009 NextApp, Inc.
*
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*/
package nextapp.echo2.app.componentxml.propertypeer;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Iterator;
import nextapp.echo2.app.LayoutData;
import nextapp.echo2.app.Style;
import nextapp.echo2.app.componentxml.ComponentIntrospector;
import nextapp.echo2.app.componentxml.ComponentXmlException;
import nextapp.echo2.app.componentxml.InvalidPropertyException;
import nextapp.echo2.app.componentxml.PropertyLoader;
import nextapp.echo2.app.componentxml.PropertyXmlPeer;
import nextapp.echo2.app.util.DomUtil;
import org.w3c.dom.Element;
/**
* <code>PropertyXmlPeer</code> implementation for
* <code>nextapp.echo2.app.LayoutData</code>-derived properties.
* <p>
* This peer will load properties for arbitrary <code>LayoutData</code>
* implementations using class introspection and reflection. The
* implementation does not currently support the setting of indexed
* properties.
*/
public class LayoutDataPeer
implements PropertyXmlPeer {
/**
* @see nextapp.echo2.app.componentxml.PropertyXmlPeer#getValue(java.lang.ClassLoader,
* java.lang.Class, org.w3c.dom.Element)
*/
public Object getValue(ClassLoader classLoader, Class objectClass, Element propertyElement)
throws InvalidPropertyException {
try {
Element layoutDataElement = DomUtil.getChildElementByTagName(propertyElement, "layout-data");
String type = layoutDataElement.getAttribute("type");
// Load properties from XML into Style.
PropertyLoader propertyLoader = PropertyLoader.forClassLoader(classLoader);
Element propertiesElement = DomUtil.getChildElementByTagName(layoutDataElement, "properties");
Style propertyStyle = propertyLoader.createStyle(propertiesElement, type);
// Instantiate LayoutData instance.
Class propertyClass = Class.forName(type, true, classLoader);
LayoutData layoutData = (LayoutData) propertyClass.newInstance();
// Create introspector to analyze LayoutData class.
ComponentIntrospector ci = ComponentIntrospector.forName(type, classLoader);
// Set property values of LayoutData instance.
Iterator it = propertyStyle.getPropertyNames();
while (it.hasNext()) {
String propertyName = (String) it.next();
Method writeMethod = ci.getWriteMethod(propertyName);
writeMethod.invoke(layoutData, new Object[]{propertyStyle.getProperty(propertyName)});
}
return layoutData;
} catch (ClassNotFoundException ex) {
throw new InvalidPropertyException("Unable to process properties.", ex);
} catch (ComponentXmlException ex) {
throw new InvalidPropertyException("Unable to process properties.", ex);
} catch (InstantiationException ex) {
throw new InvalidPropertyException("Unable to process properties.", ex);
} catch (IllegalAccessException ex) {
throw new InvalidPropertyException("Unable to process properties.", ex);
} catch (IllegalArgumentException ex) {
throw new InvalidPropertyException("Unable to process properties.", ex);
} catch (InvocationTargetException ex) {
throw new InvalidPropertyException("Unable to process properties.", ex);
}
}
}