hi, back again - i have been facing this issue again since the past 3 days - i have tried all ways - but the field conversion does not happen!
the requirement is that i have a csv field in my database of the type keywords that needs to be accessed and indexed as a keyword string each.
like clothes, clothing, fabric may be stored in the database in a single column - but they need to be accessed and indexed as each term that is 'clothes' | 'clothing' | 'fabric' are all separate.
hence, i am using list<string> as advised in some forums along with a twowaystringbridge to convert from csv-string to list and from list to csv-string.
Code:
@Column(name="dhl_cs_product_keywords", nullable=false, length=1000)
@Field(index=Index.YES, analyze=Analyze.YES, store=Store.NO, bridge=@FieldBridge(impl=DHLCSKeywordFieldBridge.class))
// is it a bird, is it a plane - it is fieldbridge! - solution for csv fields in hibernate search/lucene
public List<String> getDhlCsItemKeywords() {
return this.dhlCsItemKeywords;
}
and this is the implementation of the field bridge
Code:
public class DHLCSKeywordFieldBridge implements TwoWayStringBridge {
public String objectToString(Object value)
{
if ( value == null ) {
return null;
}
// set is mandatory
if ( !( value instanceof Collection ) ) {
throw new IllegalArgumentException( "This FieldBridge only supports Collections (List)." );
}
List<String> objects = (List <String>) value;
StringBuffer buf = new StringBuffer();
if (value != null) {
Collection<?> col = (Collection<?>) value;
Iterator<?> it = col.iterator();
// convert to csv
while (it.hasNext()) {
String next = it.next().toString();
buf.append(next);
if (it.hasNext())
buf.append(", ");
}
}
// simply a string representation
return buf.toString();
}
public List<String> stringToObject(String arg0) {
List<String> keywords = new ArrayList<String>();
// string to list - no null checks or bounds
StringTokenizer sTokenizer = new StringTokenizer(arg0, ",");
while(sTokenizer.hasMoreTokens()) {
keywords.add(sTokenizer.nextToken());
}
return keywords;
}
}
is this the right usage of a two way string bridge? i am getting the following error on simply hibernate initialization inside weblogic 12c.
Code:
org.hibernate.MappingException: Could not determine type for: java.util.List, at table: dhl_cs_classification, for columns: [org.hibernate.mapping.Column(dhl_cs_product_keywords)]
at org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:396)
at org.hibernate.mapping.SimpleValue.isValid(SimpleValue.java:369)
at org.hibernate.mapping.Property.isValid(Property.java:225)
at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:529)
at org.hibernate.mapping.RootClass.validate(RootClass.java:265)
at org.hibernate.boot.internal.MetadataImpl.validate(MetadataImpl.java:329)
at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:443)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:708)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:724)
at com.aptean.dhl.cs.persistence.configuration.DHLCSPersistenceConfiguration.<clinit>(DHLCSPersistenceConfiguration.java:34)
at com.aptean.dhl.cs.search.impl.DHLCSSearchImpl.<clinit>(DHLCSSearchImpl.java:49)
at com.aptean.dhl.cs.service.impl.DHLCSServiceImpl.getAllKeywords(DHLCSServiceImpl.java:65)
at com.aptean.dhl.cs.ws.DHLCSWebServiceImpl.getAllKeywords(DHLCSWebServiceImpl.java:78)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.apache.cxf.service.invoker.AbstractInvoker.performInvocation(AbstractInvoker.java:180)
at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:96)
at org.apache.cxf.jaxws.AbstractJAXWSMethodInvoker.invoke(AbstractJAXWSMethodInvoker.java:178)
at org.apache.cxf.jaxws.JAXWSMethodInvoker.invoke(JAXWSMethodInvoker.java:68)
at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:75)
at org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:58)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at org.apache.cxf.workqueue.SynchronousExecutor.execute(SynchronousExecutor.java:37)
at org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:107)
at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:271)
at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:121)
at org.apache.cxf.transport.http_jetty.JettyHTTPDestination.serviceRequest(JettyHTTPDestination.java:355)
at org.apache.cxf.transport.http_jetty.JettyHTTPDestination.doService(JettyHTTPDestination.java:319)
at org.apache.cxf.transport.http_jetty.JettyHTTPHandler.handle(JettyHTTPHandler.java:72)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1074)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1010)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
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