I made this post to the user group. I thought you guys might be interested in what I did to make serialization work for objects declared as interfaces or abstract classes. As I said below, if this has not been corrected in 2.2, maybe you can use the code! (i'VE not included any code in this mail that i wrote for the inheritance thing...) ----- I was able to write a single class that converts any java bean to SOAP XML and does not include all the bulky envelope stuff. I did have to modify a few of the the soap classes as well to overload some methods. here's how (note that that obviously you will have to modify the main to serialize classes other than the ones I am serializing). If anyone is really interested in using this stuff, we are using it in a production database to serialize and deserialize very complex hierarchical objects and it works great. I could post up all the classes if there is interest. Another thing I did was create an interface serialize. this was needed because often objects are declared as marker interfaces or abstract classes. of course apache soap chokes when it tries to instantiate these since they are not instantiable. So I have also made the apache code completely able to deal with inheritance, etc. I made all these changes to the soap 2.1 code base. Maybe this was fixed by somebody else in 2.2 release, but I needed this stuff fixed and 2.2 wasn't out at the time. Like I said, if there is interest I would like to see this code pushed into future releases of apache soap (the inheritance stuff I mean). this is just : import java.beans.*; import java.lang.reflect.*; import org.apache.soap.util.xml.*; import org.apache.soap.encoding.soapenc.*; import org.apache.soap.rpc.*; import org.apache.soap.*; import java.io.*; import com.grvt8.leap.util.*; import org.apache.log4j.*; import org.apache.soap.server.*; import org.apache.soap.encoding.*; import java.util.*; import org.apache.soap.util.*; import org.apache.soap.util.xml.*; import org.w3c.dom.*; import com.grvt8.leap.api.clouds.*; /** * <code>XMLBeanSerializer</code> marshals and unmarshals Beans. Designed * to read and write XML from a database. * @author <a href="mailto:[EMAIL PROTECTED]";>Geoff Hendrey</a> * @see BeanSerializer */ public class XMLBeanSerializer extends BeanSerializer { private final static String inScopeEncStyle = Constants.NS_URI_SOAP_ENC; private static final Category cat = Category.getInstance(XMLBeanSerializer.class.getName()); private XMLJavaMappingRegistry xjmr = null; public XMLBeanSerializer() { //empty constructor for java bean //Don't use this constructor. } /** * Use this constructor, not the default constructor. * @param ddFileName java.lang.String - full path to the DeploymentDescriptor.xml */ public XMLBeanSerializer(String ddFileName) { super(); try { xjmr = getSMR(ddFileName); }catch(Exception e) { cat.fatal(e); } } /** * converts a java bean into xml. * The goal is to use the Apache XML Bean serialization code, without * creating superfluous envelopes that are used for SOAP transport, but * are not needed for database storage. * @param src java.lang.Object - the java bean. * @param context java.lang.String - the instance name of the java bean. For example * if marshalling a RequestProcessor instance, context might be "requestProcessor2". * @param writer java.io.writer - the xml gets written to this sink. * @param beanNameSpaceURI - a namespace is defined for all of our Gravitate classes * that we want to marshal. This namespace is defined in DeploymentDescriptor.xml. * At the moment, we name it "urn:RemoteRequestManagerTypes" */ public void marshall(Object src, String context, Writer sink, String beanNameSpaceURI) throws IllegalArgumentException, IOException { try { SOAPContext ctx = new SOAPContext(); NSStack nsStack = new NSStack(); Class javaType = src.getClass(); //push scope for the namespaces that would otherwise go in the envelope nsStack.pushScope(); //since there is no Envelope used for serializing Beans to the //database, we must push the scopes manually that would have been //in the envelope declareEnvelopeNamespaces(nsStack); //we must also add a namespace declaration for our Beans that are listed //in the deployment descriptor. nsStack.addNSDeclaration(beanNameSpaceURI); //push scope for this bean we are serializing nsStack.pushScope(); //because we have no envelope, we put the attributes that we pushed onto envelope's scope //into the attributes of the first tag. String beanNSPrefix = nsStack.getPrefixFromURI(beanNameSpaceURI, sink); String attributes = " " + Constants.NS_PRE_XMLNS + ":"+Constants.NS_PRE_SCHEMA_XSI+ "=\""+Constants.NS_URI_SCHEMA_XSI+"\" "+ Constants.NS_PRE_XMLNS+":"+Constants.NS_PRE_SCHEMA_XSD+"=\""+Constants.NS_UR I_SCHEMA_XSD+ "\" "+ Constants.NS_PRE_XMLNS + ":"+beanNSPrefix+"=\""+ beanNameSpaceURI+"\""; //This is a new utility method that will put additional attributes //in the first tag of the bean we are marshalling. We need to put the //namespaces that would otherwise have been in the envelope into the tag. SoapEncUtils.generateStructureHeaderWithAttributes(inScopeEncStyle, javaType, context, sink, nsStack, xjmr,null,null,false,attributes); //from here down it's simply a cut and paste from this point in super.marshall() //This will have to be maintained if the stuff in super.marshall() //changes in the future. Nothing I can do about it though, because //the code in super.marshall() is pretty monolithic. sink.write(org.apache.soap.util.StringUtils.lineSeparator); PropertyDescriptor[] properties = getPropertyDescriptors(javaType); for (int i = 0; i < properties.length; i++) { propName = properties[i].getName(); propType = properties[i].getPropertyType(); // Serialize every property except the "class" property. if (!propType.equals(Class.class)) { Method propReadMethod = properties[i].getReadMethod(); // Only serialize readable properties. if (propReadMethod != null) { propValue = null; // Get the property's value. try { if (src != null) { propValue = propReadMethod.invoke(src, new Object[]{}); } } catch (Exception e) { throw new IllegalArgumentException("Unable to retrieve '" + propName + "' property " + "value: " + e.getMessage() + '.'); } // Serialize the property. Parameter param = new Parameter(propName, propType, propValue, null); xjmr.marshall(inScopeEncStyle, Parameter.class, param, null, sink, nsStack, ctx); sink.write(org.apache.soap.util.StringUtils.lineSeparator); } } } sink.write("</" + context + '>'); nsStack.popScope(); } catch(Exception e) { System.out.println(e); } } private void declareEnvelopeNamespaces(NSStack nsStack) { nsStack.addNSDeclaration(Constants.NS_PRE_SCHEMA_XSI, Constants.NS_URI_SCHEMA_XSI); nsStack.addNSDeclaration(Constants.NS_PRE_SCHEMA_XSD, Constants.NS_URI_SCHEMA_XSD); } /** * converts xml into java bean * @param elementType org.apache.soap.util.xml.QName. - for example, Bean bean =new QName("urn:RemoteRequestManagerTypes", "Profile") * @param xmlReader java.io.Reader - the xml gets read from here. */ public Bean unmarshall(QName elementType, Reader xmlReader) { XercesParserLiaison xpl = new XercesParserLiaison(); Document doc = null; Node src = null; try { doc = xpl.read("usless string", xmlReader); src = (Node) doc.getDocumentElement(); } catch(Exception e) { System.out.println(e); } SOAPContext ctx = new SOAPContext(); NSStack nsStack = new NSStack(); return super.unmarshall(inScopeEncStyle, elementType, src, xjmr,ctx); } private SOAPMappingRegistry getSMR(String ddFileName) throws Exception { cat.debug("Creating Soap Mapping Registry from DeploymentDescriptor"); File f= new File(ddFileName); FileReader fr = new FileReader(f); DeploymentDescriptor dd = DeploymentDescriptor.fromXML(fr); cat.debug("deployment descriptor read from " + ddFileName + ": " + dd); SOAPMappingRegistry smr = DeploymentDescriptor.buildSOAPMappingRegistry (dd); return smr; } public static void main(String[] args) { FileWriter fw = null; XMLBeanSerializer ser = null; XercesParserLiaison xpl = new XercesParserLiaison(); FileReader fr = null; Document doc = null; try { fw = new FileWriter("c:/TEMP/test.xml"); IDevice iDevice = new Device("PHONE","555-1212"); Profile prof = new Profile(); prof.setValue("SOME STRING I SET"); ListNearbyUsersRequest list = new ListNearbyUsersRequest(); ser = new XMLBeanSerializer("c:/TEMP/DeploymentDescriptor.xml"); fw.flush(); //ser.marshall((Object)phone,"Phone",(Writer)fw); //XMLJavaMappingRegistry xjmr = ser.getSMR("c:/TEMP/DeploymentDescriptor.xml"); //ser.marshall((Object)prof,"profile",(Writer)fw, "urn:RemoteRequestManagerTypes"); ser.marshall((Object)list,"ListNearbyUsersRequest",(Writer)fw, "urn:RemoteRequestManagerTypes"); fw.flush(); cat.info("closing FileWriter"); fr = new FileReader("c:/TEMP/test.xml"); //Bean bean = ser.unmarshall(new QName("urn:RemoteRequestManagerTypes", "Profile"),fr); //Profile prof2 = (Profile) bean.value; //System.out.println(prof2.getValue()); Bean bean = ser.unmarshall(new QName("urn:RemoteRequestManagerTypes", "ListNearbyUsersRequest"),fr); list = (ListNearbyUsersRequest) bean.value; System.out.println(list.getFindMaxUsers()); /* Bean bean = ser.unmarshall(new QName("urn:RemoteRequestManagerTypes", "Phone"),fr); Phone phone2 = (Phone) bean.value; System.out.println(phone2.getProtocol()+":"+phone2.getValue()); */ }catch(Exception e) { System.out.println(e); } } -----Original Message----- From: graham glass [mailto:[EMAIL PROTECTED]] Sent: Friday, August 10, 2001 11:49 PM To: [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: RE: Converting Java objects to XML using SOAP utilities the GLUE java/xml facility is independent of SOAP and will soon be available as a separate standalone package. cheers, graham http://www.themindelectric.com -----Original Message----- From: Kartheek Hirode [mailto:[EMAIL PROTECTED]] Sent: Friday, August 10, 2001 5:22 PM To: [EMAIL PROTECTED] Subject: RE: Converting Java objects to XML using SOAP utilities 1) Look at http://castor.exolab.org/ 2) Keep your eyes on http://java.sun.com/xml/jaxb/index.html for implementations from Javasoft. Using SOAP for Java-to-XML would be like using a hammer to turn a screw. Regards, --KH -----Original Message----- From: wen xie [mailto:[EMAIL PROTECTED]] Sent: Thursday, August 09, 2001 1:21 PM To: [EMAIL PROTECTED] Subject: Converting Java objects to XML using SOAP utilities Hi, I am trying to use SOAP utilities to convert Java objects to XML format since I know that SOAP embeds objects to XML messages. I did some searches but so far no good. I don't need to invoke RPCs or communicate between client and server. Simply I just want to know how I can convert Java objects to XML using SOAP. Could someone give me a hint about this? Thanks a lot. Wen _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp - GEOFF HENDREY - Chief Technology Officer Gravitate, Inc. 713 Linden Avenue South San Francisco, CA 94080 Office 650-873-4373 x101 Mobile 650-270-7020 Fax 650-873-4393
