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From maomaode <maoma...@gmail.com>
Subject Re: Is JXPath support Boolean?
Date Sat, 03 Feb 2007 11:09:46 GMT
Hi Matt ,

Thanks for reply.

Yes, your alternative solutions definitely will work,
But, I'm not sure it's a good idea to make the JXPath support Boolean? 
or do we have a plan to support Boolean?

And anther related question is that, do we have a plan to support new 
features in JDK5, e.g Generics, Annotation etc.?

Thanks,
James.
> --- maomaode <maomaode@gmail.com> wrote:
>
>   
>> Hi,
>>
>> I'm a new user of JXPath, my working env: JDK5,
>> JXPath 1.2
>>
>> I have a Nested bean class:
>>
>> Config.java which has a getter:
>>
>> CacheConfig getCache() {
>>    return this.cache;
>> }
>>
>> The CacheConfig.java which has two getters:
>>
>> Boolean isEnable() {
>>    return this.enable;
>> }
>>
>> String getDir() {
>>    return this.dir
>> }
>>
>> So my simple test code is:
>>
>> JXPathContext context =
>> JXPathContext.newContext(config);
>> context.getValue("/cache/dir");
>> This one works perfectly
>>
>> But, Unfortunately,
>> context.getValue("/cache/enable");
>>
>> what i got is :
>>
>> org.apache.commons.jxpath.JXPathException: Cannot
>> access property: 
>> config.CacheConfig.enable
>> o read method
>>         at 
>>
>>     
> org.apache.commons.jxpath.util.ValueUtils.getValue(ValueUtils.java:348)
>   
>>         at 
>>
>>     
> org.apache.commons.jxpath.ri.model.beans.BeanPropertyPointer.getBaseValue(BeanPropertyPointer.java:108)
>   
>>         at 
>>
>>     
> org.apache.commons.jxpath.ri.model.beans.BeanPropertyPointer.getImmediateNode(BeanPropertyPointer.java:135)
>   
>>         at 
>>
>>     
> org.apache.commons.jxpath.ri.model.beans.PropertyPointer.getImmediateValuePointer(PropertyPointer.java:127)
>   
>>         at 
>>
>>     
> org.apache.commons.jxpath.ri.model.NodePointer.getValuePointer(NodePointer.java:238)
>   
>>         at 
>>
>>     
> org.apache.commons.jxpath.ri.JXPathContextReferenceImpl.getValue(JXPathContextReferenceImpl.java:331)
>   
>>         at 
>>
>>     
> org.apache.commons.jxpath.ri.JXPathContextReferenceImpl.getValue(JXPathContextReferenceImpl.java:280)
>   
>> So, i wondering, the JXPath only support get***, not
>> the is***?
>>
>> I have raised a jira bug[1],  i got a quick
>> response, thanks, BTW
>> The answer is JXPath do support is*** feature, so i
>> guess i must misuse 
>> the JXPath, or the version is not correct?
>>
>> Can someone help me out? just tell me how to
>> retrieve the 
>> boolean/Boolean value from the beans, or tell me
>> where is the unit test 
>> code.
>> TBH, i can not find the test case which include
>> isFoo() mentioned in the 
>> jira response.
>>
>>     
>
> mmm... my guess would be that java.beans.introspector
> does not count Booleans, which are Objects, as being
> eligible for the isFoo() naming convention, only
> boolean primitives.  The javadoc of
> java.beans.PropertyDescriptor's (String, Class)
> constructor possibly implies this.  All I can tell you
> is to use a primitive or take it up with Sun to have
> Boolean isFoo() recognized.  OR... you could change
> your isEnable() to getEnable(), or simply add
> getEnable() as an alternate form of getEnable()--one
> that will just happen to be recognized by jxpath.
>
> -Matt
>
>
>
>   
>> Thanks in advance
>> James.
>>
>>
>>     
> [1]https://issues.apache.org/jira/browse/JXPATH-78?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
>   
>>
>>
>>     
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>>     
>
>
>
>  
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