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Posted to user@struts.apache.org by Ray Madigan <ra...@madigans.org> on 2003/09/18 22:02:42 UTC
Map Backed Form
I am having some difficulty with my Map Backed Form implementation.
I have in my Form:
private Properties elementMap = null;
public String getElementMap ( String key ) {
return ( String ) elementMap.getProperty ( key );
}
public void setElementMap ( String key, String value ) {
elementMap.put ( key, value );
}
public void reset ( ActionMapping mapping, HttpServletRequest request ) {
...
elementMap = new Properties ( );
}
I have in my JSP:
<html-el:text property='elementMap(${element.element})'
value='${element.value}'/>
If I enumerate the request parameters in the reset method of the form
the paramaters and values look like:
name->elementMap(PerPage)
value->4
I get the exception
java.lang.IllegalAccessError: try to access class
org.apache.commons.beanutils.MappedPropertyDescriptor$1 from class
org.apache.commons.beanutils.MappedPropertyDescriptor
>From past experience I get this exception when struts is looking for a
setter
in my form and can't find it. I think that struts is looking for a method
'setElementMap(perPage)' and has not figured out it is a mapped property
for some reason. And I can't write a method with name.
Any help would be appreciated.
Thanks
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RE: Map Backed Form/Tiles
Posted by Ray Madigan <ra...@madigans.org>.
Nope! Im sorry to say. I only wish it were so.
The page comes up and initializes correctly with the value
that ${element.value} evaluates to.
So _ I think it might be in some way environmental, so I will
double and triple check the common-* jars for size and dates.
Thanks for all of your help!
-----Original Message-----
From: Jason Lea [mailto:jason@kumachan.net.nz]
Sent: Friday, September 19, 2003 4:20 PM
To: Struts Users Mailing List
Subject: Re: Map Backed Form/Tiles
Ray Madigan wrote:
> I have narrowed the problem down to:
>
> <html-el:text property='elementMap(${element.element})'
> value='${element.value}'/>
>
> being in a tile. If the tag is in the main body of the JSP
> everything works as it should.
>
> ???? - Guess I better look harder at the tiles I use.
>
> Thanks
Looking at this I haven't used the value='' attribute before. The
Struts taglib API says
' Value to which this field should be initialized. [Use the
corresponding bean property value] [RT Expr]'
This sounds like it will try to access the method in the form bean to
find the initial value.
If your ${element.value} evaluates to "abc" then it will try to do a
Form.getAbc() for the initial value. I don't think that is what you want.
I think you should be using this:
<html-el:text property='elementMap(${element.element})'/>
and in the action that you call to get to this JSP page, you should be
putting in the initial values.
--
Jason Lea
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Re: Map Backed Form/Tiles
Posted by Jason Lea <ja...@kumachan.net.nz>.
Ray Madigan wrote:
> I have narrowed the problem down to:
>
> <html-el:text property='elementMap(${element.element})'
> value='${element.value}'/>
>
> being in a tile. If the tag is in the main body of the JSP
> everything works as it should.
>
> ???? - Guess I better look harder at the tiles I use.
>
> Thanks
Looking at this I haven't used the value='' attribute before. The
Struts taglib API says
' Value to which this field should be initialized. [Use the
corresponding bean property value] [RT Expr]'
This sounds like it will try to access the method in the form bean to
find the initial value.
If your ${element.value} evaluates to "abc" then it will try to do a
Form.getAbc() for the initial value. I don't think that is what you want.
I think you should be using this:
<html-el:text property='elementMap(${element.element})'/>
and in the action that you call to get to this JSP page, you should be
putting in the initial values.
--
Jason Lea
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RE: Map Backed Form/Tiles
Posted by Ray Madigan <ra...@madigans.org>.
I have narrowed the problem down to:
<html-el:text property='elementMap(${element.element})'
value='${element.value}'/>
being in a tile. If the tag is in the main body of the JSP
everything works as it should.
???? - Guess I better look harder at the tiles I use.
Thanks
-----Original Message-----
From: news [mailto:news@sea.gmane.org]On Behalf Of Navneet Karnani
Sent: Thursday, September 18, 2003 10:34 PM
To: struts-user@jakarta.apache.org
Subject: Re: Map Backed Form
I suggest that you look at the code once more. There is a possibility
that the error is not due to the problem that you see but something
else. And i'm nearly sure that the problem is not as complex as it seems.
If you want, I can look at the sources and test a fix at my side.
Let me know.
- Navneet Karnani
Umber Business Solutions Pvt. Ltd.
Ray Madigan said the following on 19/09/2003 3:15 AM:
> I tried this - same result? hmmmm
>
> -----Original Message-----
> From: Jason Lea [mailto:jason@kumachan.net.nz]
> Sent: Thursday, September 18, 2003 2:18 PM
> To: Struts Users Mailing List
> Subject: Re: Map Backed Form
>
>
> I read this somewhere (perhaps Struts in Action) and I use map-backed
> properties... the methods should have String keys, but Object values eg
>
> public Object getElementMap ( String key ) {
> public void setElementMap ( String key, Object value )
>
>
> Ray Madigan wrote:
>
>
>>I am having some difficulty with my Map Backed Form implementation.
>>
>>I have in my Form:
>>
>>private Properties elementMap = null;
>>
>>public String getElementMap ( String key ) {
>> return ( String ) elementMap.getProperty ( key );
>>}
>>
>>public void setElementMap ( String key, String value ) {
>> elementMap.put ( key, value );
>>}
>>
>>public void reset ( ActionMapping mapping, HttpServletRequest request ) {
>> ...
>> elementMap = new Properties ( );
>>}
>>
>>I have in my JSP:
>>
>><html-el:text property='elementMap(${element.element})'
>>value='${element.value}'/>
>>
>>If I enumerate the request parameters in the reset method of the form
>>the paramaters and values look like:
>>
>>name->elementMap(PerPage)
>>value->4
>>
>>I get the exception
>>java.lang.IllegalAccessError: try to access class
>>org.apache.commons.beanutils.MappedPropertyDescriptor$1 from class
>>org.apache.commons.beanutils.MappedPropertyDescriptor
>>
>>>>From past experience I get this exception when struts is looking for a
>>setter
>>in my form and can't find it. I think that struts is looking for a method
>>'setElementMap(perPage)' and has not figured out it is a mapped property
>>for some reason. And I can't write a method with name.
>>
>>Any help would be appreciated.
>>
>>Thanks
>>
>>
>>---------------------------------------------------------------------
>>To unsubscribe, e-mail: struts-user-unsubscribe@jakarta.apache.org
>>For additional commands, e-mail: struts-user-help@jakarta.apache.org
>>
>>
>
>
>
> --
> Jason Lea
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: struts-user-unsubscribe@jakarta.apache.org
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---------------------------------------------------------------------
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Re: Map Backed Form
Posted by Navneet Karnani <na...@myrealbox.com>.
I suggest that you look at the code once more. There is a possibility
that the error is not due to the problem that you see but something
else. And i'm nearly sure that the problem is not as complex as it seems.
If you want, I can look at the sources and test a fix at my side.
Let me know.
- Navneet Karnani
Umber Business Solutions Pvt. Ltd.
Ray Madigan said the following on 19/09/2003 3:15 AM:
> I tried this - same result? hmmmm
>
> -----Original Message-----
> From: Jason Lea [mailto:jason@kumachan.net.nz]
> Sent: Thursday, September 18, 2003 2:18 PM
> To: Struts Users Mailing List
> Subject: Re: Map Backed Form
>
>
> I read this somewhere (perhaps Struts in Action) and I use map-backed
> properties... the methods should have String keys, but Object values eg
>
> public Object getElementMap ( String key ) {
> public void setElementMap ( String key, Object value )
>
>
> Ray Madigan wrote:
>
>
>>I am having some difficulty with my Map Backed Form implementation.
>>
>>I have in my Form:
>>
>>private Properties elementMap = null;
>>
>>public String getElementMap ( String key ) {
>> return ( String ) elementMap.getProperty ( key );
>>}
>>
>>public void setElementMap ( String key, String value ) {
>> elementMap.put ( key, value );
>>}
>>
>>public void reset ( ActionMapping mapping, HttpServletRequest request ) {
>> ...
>> elementMap = new Properties ( );
>>}
>>
>>I have in my JSP:
>>
>><html-el:text property='elementMap(${element.element})'
>>value='${element.value}'/>
>>
>>If I enumerate the request parameters in the reset method of the form
>>the paramaters and values look like:
>>
>>name->elementMap(PerPage)
>>value->4
>>
>>I get the exception
>>java.lang.IllegalAccessError: try to access class
>>org.apache.commons.beanutils.MappedPropertyDescriptor$1 from class
>>org.apache.commons.beanutils.MappedPropertyDescriptor
>>
>>>>From past experience I get this exception when struts is looking for a
>>setter
>>in my form and can't find it. I think that struts is looking for a method
>>'setElementMap(perPage)' and has not figured out it is a mapped property
>>for some reason. And I can't write a method with name.
>>
>>Any help would be appreciated.
>>
>>Thanks
>>
>>
>>---------------------------------------------------------------------
>>To unsubscribe, e-mail: struts-user-unsubscribe@jakarta.apache.org
>>For additional commands, e-mail: struts-user-help@jakarta.apache.org
>>
>>
>
>
>
> --
> Jason Lea
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: struts-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: struts-user-help@jakarta.apache.org
---------------------------------------------------------------------
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Re: Map Backed Form
Posted by Jason Lea <ja...@kumachan.net.nz>.
You don't have any other setElementMap() methods in there do you?
eg
public void setElementMap(String key, Object value)
public void setElementMap(String key, String value)
There should only be 1.
Ray Madigan wrote:
> Jason - thanks for your help. I do appreciate it.
>
> This code worked in 1.1 beta and I haven't had a chance to look at it
> since then. I have found that the exception I am getting is caused by
> Struts via BeanUtils attempting to access a setter on a bean when the
> setter method doesn't exist.
>
> I added to the line:
> private Properties elementMap = new Properties();
>
> I rechecked the name of the methods and the name in the jsp.
> I remember once I had a space between the ( and the parameter and
> the parser couldn't find the parameter.
>
> This page lives in a set of pages that all use the same formBean
> it is the only page that uses the map. Also the html text control
> code lives in a tile. The tile declares itself a form and uses the
> correct form.
>
> I'll have to dig in the source I guess.
>
>
> -----Original Message-----
> From: Jason Lea [mailto:jason@kumachan.net.nz]
> Sent: Thursday, September 18, 2003 3:29 PM
> To: Struts Users Mailing List
> Subject: Re: Map Backed Form
>
>
> Perhaps you need to step through the struts-config to make sure you are
> referencing the correct form bean.
>
> Do you access the .jsp page directly or go through an action first?
>
> I would also look at your initialisation of the elementMap. Perhaps you
> should be using
>
> private Properties elementMap = new Properties();
>
> and in your reset method:
>
> elementMap.clear()
>
> to make sure it is initialised at first use. If you accessed the .jsp
> directly I don't think the reset method is called, but the bean is created.
>
>
> Ray Madigan wrote:
>
>
>>I tried this - same result? hmmmm
>>
>>-----Original Message-----
>>From: Jason Lea [mailto:jason@kumachan.net.nz]
>>Sent: Thursday, September 18, 2003 2:18 PM
>>To: Struts Users Mailing List
>>Subject: Re: Map Backed Form
>>
>>
>>I read this somewhere (perhaps Struts in Action) and I use map-backed
>>properties... the methods should have String keys, but Object values eg
>>
>>public Object getElementMap ( String key ) {
>>public void setElementMap ( String key, Object value )
>>
>>
>>Ray Madigan wrote:
>>
>>
>>
>>>I am having some difficulty with my Map Backed Form implementation.
>>>
>>>I have in my Form:
>>>
>>>private Properties elementMap = null;
>>>
>>>public String getElementMap ( String key ) {
>>> return ( String ) elementMap.getProperty ( key );
>>>}
>>>
>>>public void setElementMap ( String key, String value ) {
>>> elementMap.put ( key, value );
>>>}
>>>
>>>public void reset ( ActionMapping mapping, HttpServletRequest request ) {
>>> ...
>>> elementMap = new Properties ( );
>>>}
>>>
>>>I have in my JSP:
>>>
>>><html-el:text property='elementMap(${element.element})'
>>>value='${element.value}'/>
>>>
>>>If I enumerate the request parameters in the reset method of the form
>>>the paramaters and values look like:
>>>
>>>name->elementMap(PerPage)
>>>value->4
>>>
>>>I get the exception
>>>java.lang.IllegalAccessError: try to access class
>>>org.apache.commons.beanutils.MappedPropertyDescriptor$1 from class
>>>org.apache.commons.beanutils.MappedPropertyDescriptor
>>>
>>>>>From past experience I get this exception when struts is looking for a
>>>setter
>>>in my form and can't find it. I think that struts is looking for a method
>>>'setElementMap(perPage)' and has not figured out it is a mapped property
>>>for some reason. And I can't write a method with name.
>>>
>>>Any help would be appreciated.
>>>
>>>Thanks
>>>
>>>
>>>---------------------------------------------------------------------
>>>To unsubscribe, e-mail: struts-user-unsubscribe@jakarta.apache.org
>>>For additional commands, e-mail: struts-user-help@jakarta.apache.org
>>>
>>>
>>
>>
>>
>>--
>>Jason Lea
>>
>>
>>---------------------------------------------------------------------
>>To unsubscribe, e-mail: struts-user-unsubscribe@jakarta.apache.org
>>For additional commands, e-mail: struts-user-help@jakarta.apache.org
>>
>>
>>---------------------------------------------------------------------
>>To unsubscribe, e-mail: struts-user-unsubscribe@jakarta.apache.org
>>For additional commands, e-mail: struts-user-help@jakarta.apache.org
>>
>>
>
>
>
> --
> Jason Lea
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: struts-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: struts-user-help@jakarta.apache.org
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: struts-user-unsubscribe@jakarta.apache.org
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>
>
--
Jason Lea
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RE: Map Backed Form
Posted by Ray Madigan <ra...@madigans.org>.
Jason - thanks for your help. I do appreciate it.
This code worked in 1.1 beta and I haven't had a chance to look at it
since then. I have found that the exception I am getting is caused by
Struts via BeanUtils attempting to access a setter on a bean when the
setter method doesn't exist.
I added to the line:
private Properties elementMap = new Properties();
I rechecked the name of the methods and the name in the jsp.
I remember once I had a space between the ( and the parameter and
the parser couldn't find the parameter.
This page lives in a set of pages that all use the same formBean
it is the only page that uses the map. Also the html text control
code lives in a tile. The tile declares itself a form and uses the
correct form.
I'll have to dig in the source I guess.
-----Original Message-----
From: Jason Lea [mailto:jason@kumachan.net.nz]
Sent: Thursday, September 18, 2003 3:29 PM
To: Struts Users Mailing List
Subject: Re: Map Backed Form
Perhaps you need to step through the struts-config to make sure you are
referencing the correct form bean.
Do you access the .jsp page directly or go through an action first?
I would also look at your initialisation of the elementMap. Perhaps you
should be using
private Properties elementMap = new Properties();
and in your reset method:
elementMap.clear()
to make sure it is initialised at first use. If you accessed the .jsp
directly I don't think the reset method is called, but the bean is created.
Ray Madigan wrote:
> I tried this - same result? hmmmm
>
> -----Original Message-----
> From: Jason Lea [mailto:jason@kumachan.net.nz]
> Sent: Thursday, September 18, 2003 2:18 PM
> To: Struts Users Mailing List
> Subject: Re: Map Backed Form
>
>
> I read this somewhere (perhaps Struts in Action) and I use map-backed
> properties... the methods should have String keys, but Object values eg
>
> public Object getElementMap ( String key ) {
> public void setElementMap ( String key, Object value )
>
>
> Ray Madigan wrote:
>
>
>>I am having some difficulty with my Map Backed Form implementation.
>>
>>I have in my Form:
>>
>>private Properties elementMap = null;
>>
>>public String getElementMap ( String key ) {
>> return ( String ) elementMap.getProperty ( key );
>>}
>>
>>public void setElementMap ( String key, String value ) {
>> elementMap.put ( key, value );
>>}
>>
>>public void reset ( ActionMapping mapping, HttpServletRequest request ) {
>> ...
>> elementMap = new Properties ( );
>>}
>>
>>I have in my JSP:
>>
>><html-el:text property='elementMap(${element.element})'
>>value='${element.value}'/>
>>
>>If I enumerate the request parameters in the reset method of the form
>>the paramaters and values look like:
>>
>>name->elementMap(PerPage)
>>value->4
>>
>>I get the exception
>>java.lang.IllegalAccessError: try to access class
>>org.apache.commons.beanutils.MappedPropertyDescriptor$1 from class
>>org.apache.commons.beanutils.MappedPropertyDescriptor
>>
>>>>From past experience I get this exception when struts is looking for a
>>setter
>>in my form and can't find it. I think that struts is looking for a method
>>'setElementMap(perPage)' and has not figured out it is a mapped property
>>for some reason. And I can't write a method with name.
>>
>>Any help would be appreciated.
>>
>>Thanks
>>
>>
>>---------------------------------------------------------------------
>>To unsubscribe, e-mail: struts-user-unsubscribe@jakarta.apache.org
>>For additional commands, e-mail: struts-user-help@jakarta.apache.org
>>
>>
>
>
>
> --
> Jason Lea
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: struts-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: struts-user-help@jakarta.apache.org
>
>
> ---------------------------------------------------------------------
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> For additional commands, e-mail: struts-user-help@jakarta.apache.org
>
>
--
Jason Lea
---------------------------------------------------------------------
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Re: Map Backed Form
Posted by Jason Lea <ja...@kumachan.net.nz>.
Perhaps you need to step through the struts-config to make sure you are
referencing the correct form bean.
Do you access the .jsp page directly or go through an action first?
I would also look at your initialisation of the elementMap. Perhaps you
should be using
private Properties elementMap = new Properties();
and in your reset method:
elementMap.clear()
to make sure it is initialised at first use. If you accessed the .jsp
directly I don't think the reset method is called, but the bean is created.
Ray Madigan wrote:
> I tried this - same result? hmmmm
>
> -----Original Message-----
> From: Jason Lea [mailto:jason@kumachan.net.nz]
> Sent: Thursday, September 18, 2003 2:18 PM
> To: Struts Users Mailing List
> Subject: Re: Map Backed Form
>
>
> I read this somewhere (perhaps Struts in Action) and I use map-backed
> properties... the methods should have String keys, but Object values eg
>
> public Object getElementMap ( String key ) {
> public void setElementMap ( String key, Object value )
>
>
> Ray Madigan wrote:
>
>
>>I am having some difficulty with my Map Backed Form implementation.
>>
>>I have in my Form:
>>
>>private Properties elementMap = null;
>>
>>public String getElementMap ( String key ) {
>> return ( String ) elementMap.getProperty ( key );
>>}
>>
>>public void setElementMap ( String key, String value ) {
>> elementMap.put ( key, value );
>>}
>>
>>public void reset ( ActionMapping mapping, HttpServletRequest request ) {
>> ...
>> elementMap = new Properties ( );
>>}
>>
>>I have in my JSP:
>>
>><html-el:text property='elementMap(${element.element})'
>>value='${element.value}'/>
>>
>>If I enumerate the request parameters in the reset method of the form
>>the paramaters and values look like:
>>
>>name->elementMap(PerPage)
>>value->4
>>
>>I get the exception
>>java.lang.IllegalAccessError: try to access class
>>org.apache.commons.beanutils.MappedPropertyDescriptor$1 from class
>>org.apache.commons.beanutils.MappedPropertyDescriptor
>>
>>>>From past experience I get this exception when struts is looking for a
>>setter
>>in my form and can't find it. I think that struts is looking for a method
>>'setElementMap(perPage)' and has not figured out it is a mapped property
>>for some reason. And I can't write a method with name.
>>
>>Any help would be appreciated.
>>
>>Thanks
>>
>>
>>---------------------------------------------------------------------
>>To unsubscribe, e-mail: struts-user-unsubscribe@jakarta.apache.org
>>For additional commands, e-mail: struts-user-help@jakarta.apache.org
>>
>>
>
>
>
> --
> Jason Lea
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: struts-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: struts-user-help@jakarta.apache.org
>
>
> ---------------------------------------------------------------------
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> For additional commands, e-mail: struts-user-help@jakarta.apache.org
>
>
--
Jason Lea
---------------------------------------------------------------------
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RE: Map Backed Form
Posted by Ray Madigan <ra...@madigans.org>.
I tried this - same result? hmmmm
-----Original Message-----
From: Jason Lea [mailto:jason@kumachan.net.nz]
Sent: Thursday, September 18, 2003 2:18 PM
To: Struts Users Mailing List
Subject: Re: Map Backed Form
I read this somewhere (perhaps Struts in Action) and I use map-backed
properties... the methods should have String keys, but Object values eg
public Object getElementMap ( String key ) {
public void setElementMap ( String key, Object value )
Ray Madigan wrote:
> I am having some difficulty with my Map Backed Form implementation.
>
> I have in my Form:
>
> private Properties elementMap = null;
>
> public String getElementMap ( String key ) {
> return ( String ) elementMap.getProperty ( key );
> }
>
> public void setElementMap ( String key, String value ) {
> elementMap.put ( key, value );
> }
>
> public void reset ( ActionMapping mapping, HttpServletRequest request ) {
> ...
> elementMap = new Properties ( );
> }
>
> I have in my JSP:
>
> <html-el:text property='elementMap(${element.element})'
> value='${element.value}'/>
>
> If I enumerate the request parameters in the reset method of the form
> the paramaters and values look like:
>
> name->elementMap(PerPage)
> value->4
>
> I get the exception
> java.lang.IllegalAccessError: try to access class
> org.apache.commons.beanutils.MappedPropertyDescriptor$1 from class
> org.apache.commons.beanutils.MappedPropertyDescriptor
>
>>>From past experience I get this exception when struts is looking for a
> setter
> in my form and can't find it. I think that struts is looking for a method
> 'setElementMap(perPage)' and has not figured out it is a mapped property
> for some reason. And I can't write a method with name.
>
> Any help would be appreciated.
>
> Thanks
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: struts-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: struts-user-help@jakarta.apache.org
>
>
--
Jason Lea
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Re: Map Backed Form
Posted by Jason Lea <ja...@kumachan.net.nz>.
I read this somewhere (perhaps Struts in Action) and I use map-backed
properties... the methods should have String keys, but Object values eg
public Object getElementMap ( String key ) {
public void setElementMap ( String key, Object value )
Ray Madigan wrote:
> I am having some difficulty with my Map Backed Form implementation.
>
> I have in my Form:
>
> private Properties elementMap = null;
>
> public String getElementMap ( String key ) {
> return ( String ) elementMap.getProperty ( key );
> }
>
> public void setElementMap ( String key, String value ) {
> elementMap.put ( key, value );
> }
>
> public void reset ( ActionMapping mapping, HttpServletRequest request ) {
> ...
> elementMap = new Properties ( );
> }
>
> I have in my JSP:
>
> <html-el:text property='elementMap(${element.element})'
> value='${element.value}'/>
>
> If I enumerate the request parameters in the reset method of the form
> the paramaters and values look like:
>
> name->elementMap(PerPage)
> value->4
>
> I get the exception
> java.lang.IllegalAccessError: try to access class
> org.apache.commons.beanutils.MappedPropertyDescriptor$1 from class
> org.apache.commons.beanutils.MappedPropertyDescriptor
>
>>>From past experience I get this exception when struts is looking for a
> setter
> in my form and can't find it. I think that struts is looking for a method
> 'setElementMap(perPage)' and has not figured out it is a mapped property
> for some reason. And I can't write a method with name.
>
> Any help would be appreciated.
>
> Thanks
>
>
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>
--
Jason Lea
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