Mapping java.util.hashtable

Hello all
I have a requirement of mapping java.util.hashtable to Oracle9i database. I read on the application developers guide that this type can not be mapped through the Workbench GUI and you need to write code for it.
I followed the example code as below
DirectMapMapping directMapMapping = new DirectMapMapping();
directMapMapping.setAttributeName("..");
directMapMapping.setReferenceTableName("..");
directMapMapping.setReferenceKeyFieldName("..");
directMapMapping.setDirectKeyFieldName("..");
directMapMapping.setDirectFieldName("..");
directMapMapping.setKeyClass(String.class);
directMapMapping.setValueClass(Integer.class);
descriptor.addMapping(directMapMapping);
The insertion to the database went very well but while retriving the data from the database i am getting the following error.
Exception Description: Trying to set value [[DatabaseRow(
     DUMMYTABLE.KEYVALUE => 100
     KEYNAME => 1), DatabaseRow(
     DUMMYTABLE.KEYVALUE => 200
     KEYNAME => 2)]] for instance variable [dummyTable] of type [java.util.Hashtable] in the object. The specified object is not an instance of the class or interface declaring the underlying field, or an unwrapping conversion has failed.
If any one has any idea, please let me know.
Thanks in Advance

Which version/patch is this running? I don't know of any specific bugs to this, but there have been a couple of minor seemingly-unrelated fixes to DirectMapMapping, but sometimes they're more related than you think.
The exception is saying the types aren't matching up. You are 100% sure the attribute you're mapping to is a java.util.Hashtable? It shouldn't be necessary, but you might want to call directMapMapping.useMapClass(java.util.Hashtable.class);
- Don

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Error: Unsupported Object java.util.Hashtable

Hi,
I am getting Uncategorized SQL exception for my code:
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Here is the code
public class ABC {
private static final String MYDATE = " month = ? and year = ? ";
public List<String> getTables(Report report) {
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I will appreciate your help,
Thanks in advance...

evnafets wrote:
What do you expect it to do with your "parameters"?
You are using a [Spring JdbcTemplate|http://static.springframework.org/spring/docs/2.0.x/api/org/springframework/jdbc/core/JdbcTemplate.html#queryForList(java.lang.String,%20java.lang.Object[])]
What should the where clause of your sql query be?
Why do you think this would accept parameters in a Map<Integer, Integer> ?The parameters would restrict the result I will get with my query, i have to bound with month and year constraint as part of requirements.
The Where clause would be : where month = ? and year = ? ( which could be month = 10 and year = 2008)
I am using Map<Integer, Integer> because in database these month and year values are numeric...
But I don't know what it doesn't like it?
Any idea?
Edited by: ASH_2007 on Nov 11, 2008 1:36 PM

NullpointerException in java.util.Hashtable.access$100 ???

Hi folks.
I am trying to reconstruct a Hashtable using my own way of serialization/deserialization via Java Reflection. It works fine with most classes, but a reconstructed hashtable is seriously screwed up. After reconstruction, it is passed as an argument to a class that uses the putAll-Method, which causes a NullpointerException.
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at java.util.Hashtable.access$100(Hashtable.java:90)
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at java.util.Collections$SynchronizedCollection.iterator(Collections.java:1096)
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at mypackage.serializer.XMLSerializer.main(XMLSerializer.java:66)

EntrySet has private access in java.util.Hashtable

Hi friends,
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For your reference the code goes like this,
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%>
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Regards,
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Iterator i = h.entrySet.iterator();Iterator i = h.entrySet().iterator();

I need to retrieve an Object[] of all keys in java.util.Hashtable

public abstract class ArrayFunctionality {
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Thanx
Phil

I still don't understand what you mean but it now
works..
I am sorry I just don't understand the difference
between
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String[] keyArray;
keyArray = ArrayFunctionality.arrayKeys(attrs);
}AND
if (hasSetHashtable) {
String[] keyArray =
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if (...) {
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}and
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Also from: Java API: Package java.util.concurrent, we read:
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We need to use a synchronized block or method only of two threads modify a "shared resource", if they do not modify a shared resource, we do not need to use the synchronization. Actually, you need to synchronize access to the shared resource for both readers and writers. If one thread is updating an unsynchronized HashMap, and a concurrent thread tries to read that map, it may be in an inconsistent state. When synchronizing on the map, the reader will be blocked until the writer completes.
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java.util.Properties extends java.util.Hashtable
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Hi All,
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[CODE]
(mx.rpc.events::FaultEvent)#0
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JDK 1.7.0_09 and wsimport and xjc that comes with it.
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salvojo@AUD20901BL /cygdrive/c/workspace/JSF/insurance
$ /cygdrive/c/java/jdk1.7.0_09/x64/bin/wsimport -keep -s gen-src -b external/wsdl/jaxb-bindings.xml -wsdllocation /wsdl/Member.wsdl -d WebContent/WEB-INF/classes external/wsdl/Member.wsdl
parsing WSDL...
Generating code...
Compiling code...
C:\workspace\JSF\insurance\gen-src\org\w3\_2001\xmlschema\Adapter1.java:13: error: package au.com.xxx.jaxb does not exist
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no such JAXB option: -classpath WebContent/WEB-INF/classes
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<...snipped...>... where WebContent/WEB-INF/classes is the classpath where au.com.xxx.jaxb.DateAdapter.class could be found. Obviously it did not like it.
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create additional column of type LONG to represent date.
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