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Posted to user@commons.apache.org by Marco Mistroni <mm...@waersystems.com> on 2004/04/30 10:03:47 UTC
wrap a Map into a DynaBean
Hi all,
Is there any way, using beanutils package, to 'wrap' a Map
Into a DynaBean or something similar?
>From errors that I have, answer is no, but maybe some of you know
Some alternatives..
Issue is that I am receiving different objects from my db layer, and
I am wrapping them into a DynaBean to avoid calling specific methods
For retrieving properties.
But in one case out of 10 I am receiving an HashMap, and it looks like
I cannot wrap an HashMap with a DynaBean
Anyone has any suggestions?
Thanx in advance and regards
Marco
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Re: Help with digester!
Posted by José Antonio Pérez Testa <ja...@indra.es>.
It looks like everything is ok.
Look at the logs and see what's happening.
Maybe some problem with the arguments types. Try the method
addCallMethod(String pattern, String methodName, int paramCount,
String[] paramTypes)
and explicitly set the argument types. I've found a similar problem in
calling ArrayList.add and it is because of the argument being
java.lang.Object
Good luck.
Marco Mistroni wrote:
>Hi all,
> I am experiencing problem with digester when I use
>The xml files for the rules.
>
>I have following SQL file :
>
><?xml version="1.0" encoding="UTF-8"?>
><sql>
> <statement>
> <name>getUsers</name>
> <value>select * from user_details</value>
> </statement>
> <statement>
> <name>getContact</name>
> <value>select * from contact WHERE contact_ref = ? </value>
> </statement>
></sql>
>
>I want, for each statement, to populate an Hashtable with name as key
>and
>Value as index.
>
>When running normal digester and setting rules in java code
>digester.addObjectCreate("sql", java.util.Hashtable.class);
> digester.addCallMethod("sql/statement",
>"put",2);
> digester.addCallParam("sql/statement/name", 0);
> digester.addCallParam("sql/statement/value",1);
> } catch(Exception e) {
>
>the problem is that either I don't know how to do the same in an xml
>file
>or my xml file for rules is incorrect.
>I have tried with the following
>
><?xml version="1.0"?>
><digester-rules>
> <pattern value="sql">
> <object-create-rule classname="java.util.Hashtable" />
> <set-properties-rule />
> <call-method-rule pattern="statement" methodname="put"
> paramcount="2" />
> <call-param-rule pattern="statement/name"
>paramnumber="0"/>
> <call-param-rule pattern="statement/value"
>paramnumber="1"/>
>
> </pattern>
></digester-rules>
>
>can anyone help?
>
>Thanx in advance and regards
> Marco
>
>
>
>
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Help with digester!
Posted by Marco Mistroni <mm...@waersystems.com>.
Hi all,
I am experiencing problem with digester when I use
The xml files for the rules.
I have following SQL file :
<?xml version="1.0" encoding="UTF-8"?>
<sql>
<statement>
<name>getUsers</name>
<value>select * from user_details</value>
</statement>
<statement>
<name>getContact</name>
<value>select * from contact WHERE contact_ref = ? </value>
</statement>
</sql>
I want, for each statement, to populate an Hashtable with name as key
and
Value as index.
When running normal digester and setting rules in java code
digester.addObjectCreate("sql", java.util.Hashtable.class);
digester.addCallMethod("sql/statement",
"put",2);
digester.addCallParam("sql/statement/name", 0);
digester.addCallParam("sql/statement/value",1);
} catch(Exception e) {
the problem is that either I don't know how to do the same in an xml
file
or my xml file for rules is incorrect.
I have tried with the following
<?xml version="1.0"?>
<digester-rules>
<pattern value="sql">
<object-create-rule classname="java.util.Hashtable" />
<set-properties-rule />
<call-method-rule pattern="statement" methodname="put"
paramcount="2" />
<call-param-rule pattern="statement/name"
paramnumber="0"/>
<call-param-rule pattern="statement/value"
paramnumber="1"/>
</pattern>
</digester-rules>
can anyone help?
Thanx in advance and regards
Marco
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Re: wrap a Map into a DynaBean
Posted by "Craig R. McClanahan" <cr...@apache.org>.
Marco Mistroni wrote:
>Hi all,
> Is there any way, using beanutils package, to 'wrap' a Map
>Into a DynaBean or something similar?
>
It would certainly be possible to create such an implementation, but
there's nothing like that already available in the standard [beanutils]
package. You'd need to implement both a DynaClass and a DynaBean ...
and could probably start with how WrapDynaClass and WrapDynaBean provide
wrappers for POJOs.
Craig
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Re: wrap a Map into a DynaBean
Posted by Michael McGrady <mi...@michaelmcgrady.com>.
It is really easier just to write your own tag for these specialty
needs. Tag writing is relatively easy to do.
At 01:03 AM 4/30/2004, Marco Mistroni wrote:
>Hi all,
> Is there any way, using beanutils package, to 'wrap' a Map
>Into a DynaBean or something similar?
> >From errors that I have, answer is no, but maybe some of you know
>Some alternatives..
>Issue is that I am receiving different objects from my db layer, and
>I am wrapping them into a DynaBean to avoid calling specific methods
>For retrieving properties.
>But in one case out of 10 I am receiving an HashMap, and it looks like
>I cannot wrap an HashMap with a DynaBean
>
>Anyone has any suggestions?
>
>Thanx in advance and regards
> Marco
>
>
>
>---------------------------------------------------------------------
>To unsubscribe, e-mail: commons-user-unsubscribe@jakarta.apache.org
>For additional commands, e-mail: commons-user-help@jakarta.apache.org