Looking at your provided information everything looks fine to me. But the problem could still be related to the super-class of ScopeNode or one of UserNode, GroupNode, RoleNode or ContextNode. Maybe you could try to reduce the search space by f.e. remove the extension and replace the complex types by f.e. Integers. You mentioned that if you read the mapping files as files rather than as input source it is working. Sounds like a bug to me. Maybe you could create a new JIRA entry at http://jira.codehaus.org/browse/CASTOR and attach a minimal test case to be able to reproduce the problem. You can find a detailed description on how to do that at http://www.castor.org/how-to-submit-a-bug.html.
Regards, Martin -----Ursprüngliche Nachricht----- Von: avner21J [mailto:[email protected]] Gesendet: Montag, 21. Juni 2010 11:25 An: [email protected] Betreff: Re: AW: [castor-user] org.exolab.castor.xml.MarshalException:Unable to instantiate java.util.List For more details I am adding here the class which is being unmarshalled, its mapping file and how the unmarshaller is obtained. Please let me know if you need anything else : 1. ScopeNode.java public class ScopeNode extends GenericNode { private List<UserNode> users; private List<GroupNode> groups; private List<RoleNode> roles; private List<ContextNode> contexts; private transient int enabVirRes; public List<GroupNode> getGroups() { return groups; } public void setGroups(List<GroupNode> groups1) { this.groups = groups1; } public List<RoleNode> getRoles() { return roles; } public void setRoles(List<RoleNode> roles1) { this.roles = roles1; } public List<UserNode> getUsers() { return users; } public void setUsers(List<UserNode> users1) { this.users = users1; } public List<ContextNode> getContexts() { return contexts; } public void setContexts(List<ContextNode> contexts1) { this.contexts = contexts1; } public int getEnableVirtualResource() { return enabVirRes; } public void setEnableVirtualResource(int enabVirRes1) { this.enabVirRes = enabVirRes1; } **************************************** 2. scopenode-mapping.xml <mapping> <include href="nvpair-mapping.xml"/> <include href="rule-mapping.xml"/> <include href="genericnode-mapping.xml"/> <include href="rolenode-mapping.xml"/> <include href="groupnode-mapping.xml"/> <include href="usernode-mapping.xml"/> <include href="contextnode-mapping.xml"/> <class name="com.cisco.epm.pdp.cache.ScopeNode" extends="com.cisco.epm.pdp.cache.GenericNode" > <map-to xml="ScopeNode"/> <field name="users" type="com.cisco.epm.pdp.cache.UserNode" collection="arraylist"> <bind-xml name="users" node="element"/> </field> <field name="groups" type="com.cisco.epm.pdp.cache.GroupNode" collection="arraylist"> <bind-xml name="groups" node="element"/> </field> <field name="roles" type="com.cisco.epm.pdp.cache.RoleNode" collection="arraylist"> <bind-xml name="roles" node="element"/> </field> <field name="contexts" type="com.cisco.epm.pdp.cache.ContextNode" collection="arraylist"> <bind-xml name="contexts" node="element"/> </field> <field name="enabVirRes" type="integer" transient="true" get-method="getEnableVirtualResource" set-method="setEnableVirtualResource"> <bind-xml name="enabVirRes" node="element"/> </field> </class> </mapping> **************************************** 3. Code snippet for getting unmarshaller: XMLContext xmlContext = getXMLContext(); Reader r = new BufferedReader(new InputStreamReader(is)); Unmarshaller unmarshaller = xmlContext.createUnmarshaller(); return unmarshaller.unmarshal(r); XMLContext getXMLContext() throws Exception{ try { xmlContext = new XMLContext(); Mapping mapping = new Mapping(); mapping.loadMapping(inputSource); xmlContext.addMapping(mapping); } catch (MappingException e) { LOGGER.logError("Mapping of xml elements to class members failed", e); throw e; } } here the inputSource is a instance variable which is initialized with Input Stream of the mapping file of this object.I also verified that there is no autocomplete attribute used in my mapping files. Also a strange thing is when I use these mapping files to be read as files rather than as input source it is working. But currently I am reading the mapping files as : InputStream mappingResource = getClass().getClassLoader().getResourceAsStream("scopenode-mapping.xml"); inputSource = new InputSource(mappingResource); Martin.Bolz wrote: > > Hi, > > thats strange even without a mapping file such a unmarshalling scenario > works for me. Could you provide a little > bit more detail? As far as I know reflection is not involved if you use a > mapping-file (assuming you not specified the > autocomplete feature in the mapping-file). Anyway could you also check > your not using one of the static unmarshalling > methods? This is a common mistake as your mapping-file is ignored then in > unmarshalling. > > Regards, > > Martin > > -----Ursprüngliche Nachricht----- > Von: avner21J [mailto:[email protected]] > Gesendet: Montag, 21. Juni 2010 07:20 > An: [email protected] > Betreff: [castor-user] org.exolab.castor.xml.MarshalException:Unable to > instantiate java.util.List > > > Hi, > > I am using castor (ver 1.3.1) to unmarshal an xml into a java object. > This object has member variables as collections (List). > > Even though in the mapping file I used collections attribute of field tag > and has set it to arraylist, it is still throwing this exception. > > After doing a bit of research on this,I found that since UnmarshalHandler > uses reflection to create object from xml, it is trying to invoke > java.util.List.newInstance() which might be the root of the problem. > > The class which I am trying to unmarshal is an already existing class and > I > cannot change the type of the member variables to ArrayList from List. > > Exception Trace is below: > > Caused by: java.lang.InstantiationException: java.util.List() method not > found > at > org.exolab.castor.xml.UnmarshalHandler.createInstance(UnmarshalHandler.java:2584) > at > org.exolab.castor.xml.UnmarshalHandler.startElement(UnmarshalHandler.java:2348) > at > org.exolab.castor.xml.UnmarshalHandler.startElement(UnmarshalHandler.java:1436) > at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown > Source) > at > org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown > Source) > > I am stuck with this. Please help me resolve this. > -- > View this message in context: > http://old.nabble.com/org.exolab.castor.xml.MarshalException%3AUnable-to-instantiate-java.util.List-tp28945150p28945150.html > Sent from the Castor - User mailing list archive at Nabble.com. > > > --------------------------------------------------------------------- > To unsubscribe from this list, please visit: > > http://xircles.codehaus.org/manage_email > > > > --------------------------------------------------------------------- > To unsubscribe from this list, please visit: > > http://xircles.codehaus.org/manage_email > > > > -- View this message in context: http://old.nabble.com/org.exolab.castor.xml.MarshalException%3AUnable-to-instantiate-java.util.List-tp28945150p28946559.html Sent from the Castor - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe from this list, please visit: http://xircles.codehaus.org/manage_email
