Christoph, can you briefly explain the differences between the two transformers. Whilst I am very familiar with the CastorTransformer (and Castor XML/JDO), I'd appreciate a quick overview of the functionality of the BetwixtTransformer, and what advantages it would offer to using the CastorTransformer.
>> that invokes the EJB and returns the DTO. It then passes the DTO to >Betwixt >> which converts it to SAX events. I posted the BeanGenerator on the list a > >Perheaps you are also interested in a BetwixtTransformer, analoge to >CastorTransformer? >I post it here, perheaps anyone can put it in the scratchpad? > >regards >Christoph > > >org.apache.cocoon.tranformation.BetwixtTransformer: >--------------------------------------------------- > >/* > >============================================================================ > The Apache Software License, Version 1.1 > >============================================================================ > Copyright (C) 1999-2003 The Apache Software Foundation. All rights >reserved. > Redistribution and use in source and binary forms, with or without >modifica- > tion, are permitted provided that the following conditions are met: > 1. Redistributions of source code must retain the above copyright >notice, > this list of conditions and the following disclaimer. > 2. Redistributions in binary form must reproduce the above copyright >notice, > this list of conditions and the following disclaimer in the >documentation > and/or other materials provided with the distribution. > 3. The end-user documentation included with the redistribution, if any, >must > include the following acknowledgment: "This product includes >software > developed by the Apache Software Foundation >(http://www.apache.org/)." > Alternately, this acknowledgment may appear in the software itself, >if > and wherever such third-party acknowledgments normally appear. > 4. The names "Apache Cocoon" and "Apache Software Foundation" must not >be > used to endorse or promote products derived from this software >without > prior written permission. For written permission, please contact > [EMAIL PROTECTED] > 5. Products derived from this software may not be called "Apache", nor >may > "Apache" appear in their name, without prior written permission of >the > Apache Software Foundation. > THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED >WARRANTIES, > INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY >AND > FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL >THE > APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY >DIRECT, > INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES >(INCLU- > DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; >LOSS > OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND >ON > ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR >TORT > (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE >OF > THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. > This software consists of voluntary contributions made by many >individuals > on behalf of the Apache Software Foundation and was originally created >by > Stefano Mazzocchi <[EMAIL PROTECTED]>. For more information on the >Apache > Software Foundation, please see <http://www.apache.org/>. > */ > >package org.apache.cocoon.transformation; > >import java.lang.reflect.Proxy; >import java.util.Collection; >import java.util.Iterator; >import java.util.Map; > >import org.apache.avalon.framework.configuration.Configurable; >import org.apache.avalon.framework.configuration.Configuration; >import org.apache.avalon.framework.configuration.ConfigurationException; >import org.apache.avalon.framework.parameters.Parameters; >import org.apache.cocoon.environment.Context; >import org.apache.cocoon.environment.ObjectModelHelper; >import org.apache.cocoon.environment.Request; >import org.apache.cocoon.environment.Session; >import org.apache.cocoon.environment.SourceResolver; >import org.apache.commons.betwixt.XMLIntrospector; >import org.apache.commons.betwixt.io.SAXBeanWriter; >import org.apache.commons.betwixt.strategy.ClassNormalizer; >import org.apache.commons.logging.impl.LogKitLogger; >import org.xml.sax.Attributes; >import org.xml.sax.SAXException; > >/** > * Betwixt transformer marshals a object from the Sitemap, Session, Request >or > * the Conext into a series of SAX events. > * > * Configuation: The betwixt transformer can be configured to not output >element > * reference ids. The default setting is to output reference IDs. > * <pre> > * <map:transformer name="betwixt" >src="org.apache.cocoon.transformation.BetwixtTransformer" > * <ref-ids>true</ref-ids> > * </map:transformer> > * </pre> > * > * A sample for the use: > * <pre> > * <root >xmlns:betwixt="http://apache.org/cocoon/betwixt-transfomer"> > * <betwixt:include name="invoice" /> > * <betwixt:include name="product" scope="sitemap" /> > * <betwixt:include name="product2" element="other-product" /> > * </root> > * </pre> > * The <code>BetwixtTransfomer</code> support only one Element ><code>betwixt:include</code>. > * This element is replaced with the marshalled object. The Object given >through the > * attribute <code>name</code> will be searched in the <code>request</code>, ><code>session</code>, > * <code>context</code> and at least in <code>sitemap</code>. > * If the scope is explicitly given, the object will ge located only there. > * The attribute <code>element</code> can be given to specify an alternativ > * root element for the object. Collections are marshalled by marshalling > * each object it contains. > * > * @see <a href="http://jakarta.apache.org/commons/betwixt/";>Betwixt Projekt >Homepage</a> > * @author <a href="mailto:[EMAIL PROTECTED]">Christoph Gaffga</a> > */ >public class BetwixtTransformer extends AbstractTransformer implements >Configurable { > private static final String BETWIXT_NSURI = >"http://apache.org/cocoon/betwixt-transfomer";; > > private final static String CMD_INCLUDE = "include"; > private final static String ATTR_NAME = "name"; > private final static String ATTR_SCOPE = "scope"; > private final static String SCOPE_SITEMAP = "sitemap"; > private final static String SCOPE_SESSION = "session"; > private final static String SCOPE_REQUEST = "request"; > private final static String SCOPE_CONTEXT = "context"; > private final static String ATTR_ELEMENT = "element"; > private final static String CONF_REFIDS = "ref-ids"; > > // Introspector to share XMLBeanInfo cache > private static XMLIntrospector introspector; > > private boolean refIds = true; > > private Map objectModel = null; > private boolean inBetwixtElement = false; > private SAXBeanWriter beanWriter = null; > > public void configure(Configuration conf) throws ConfigurationException { > final String refIds = conf.getChild(CONF_REFIDS).getValue("true"); > this.refIds = "false".equals(refIds) || "no".equals(refIds); > } > > public void setup(SourceResolver resolver, Map objectModel, String src, >Parameters par) { > this.objectModel = objectModel; > } > > public void recycle() { > this.objectModel = null; > this.inBetwixtElement = false; > } > > public void endElement(String uri, String name, String raw) throws >SAXException { > if (BETWIXT_NSURI.equals(uri)) { > this.inBetwixtElement = false; > } else { > super.endElement(uri, name, raw); > } > } > > public void startElement(String uri, String name, String raw, Attributes >attr) throws > SAXException { > if (BETWIXT_NSURI.equals(uri)) { > this.inBetwixtElement = true; > process(name, attr); > } else { > super.startElement(uri, name, raw, attr); > } > } > > public void characters(char[] ch, int start, int len) throws SAXException >{ > if (!this.inBetwixtElement) { > super.characters(ch, start, len); > } > } > > private void process(String command, Attributes attr) throws SAXException >{ > if (CMD_INCLUDE.equals(command)) { > final String scope = attr.getValue(ATTR_SCOPE); > final String name = attr.getValue(ATTR_NAME); > if (name == null) { > throw new SAXException("Required attribute name is missing on >element " + CMD_INCLUDE); > } > > final String element = attr.getValue(ATTR_ELEMENT); > if (element == null) { > throw new SAXException("Attribute " + ATTR_ELEMENT + " can not be >empty"); > } > > Object bean = null; > if (scope == null || SCOPE_REQUEST.equals(scope)) { > final Request request = ObjectModelHelper.getRequest(objectModel); > bean = request.getAttribute(name); > } > if ( (scope == null && bean == null) || SCOPE_SESSION.equals(scope)) { > final Session session = >ObjectModelHelper.getRequest(objectModel).getSession(false); > if (session != null) { > bean = session.getAttribute(name); > } > } > if ( (scope == null && bean == null) || SCOPE_CONTEXT.equals(scope)) { > final Context context = ObjectModelHelper.getContext(objectModel); > if (context != null) { > bean = context.getAttribute(name); > } > } > if ( (scope == null && bean == null) || SCOPE_SITEMAP.equals(scope)) { > bean = objectModel.get(name); > } > > if (bean != null) { > includeBean(name, bean, element); > } else { > getLogger().warn("Bean " + name + " could not be found"); > } > } else { > throw new SAXException("Unknown command: " + command); > } > } > > private void includeBean(String name, Object bean, String element) { > try { > if (this.beanWriter == null) { > this.beanWriter = new SAXBeanWriter(this.contentHandler); > synchronized (this.introspector) { > if (this.introspector == null) { > this.introspector = this.beanWriter.getXMLIntrospector(); > this.introspector.setLog(new LogKitLogger("betwixt")); > /* The following is needed for EJB */ > this.introspector.setClassNormalizer(new ClassNormalizer() { > public Class normalize(Class clazz) { > if (Proxy.isProxyClass(clazz) && >clazz.getInterfaces().length > 0) { > return clazz.getInterfaces()[0]; > } > return super.normalize(clazz); > } > }); > > } else { > this.beanWriter.setXMLIntrospector(this.introspector); > } > } > beanWriter.getBindingConfiguration().setMapIDs(this.refIds); > } > > if (bean instanceof Collection) { > Iterator i = ( (Collection) bean).iterator(); > while (i.hasNext()) { > if (element == null) { > beanWriter.write(bean); > } else { > beanWriter.write(element, bean); > } > } > } else { > if (element == null) { > beanWriter.write(bean); > } else { > beanWriter.write(element, bean); > } > } > } catch (Exception e) { > getLogger().warn("Failed to marshal bean " + name, e); > } > } > >} > > > >--------------------------------------------------------------------- >To unsubscribe, e-mail: [EMAIL PROTECTED] >For additional commands, e-mail: [EMAIL PROTECTED] >
