Trouble converting String to boolean in JSF

[laredotornado]

Hi,

I'm using MyFaces 1.1 for a web app deployed in Resin 3.0.19.  This is the expression I have ...

<h:selectBooleanCheckbox value="#{emailController.fields.addToENews == 'true'}" />

but when I submit my page containing this, I get the error

Parsed Expression of unsupported type for this operation. Expression class: org.apache.commons.el.BinaryOperatorExpression. Expression: '#{emailController.fields.addToENews == 'true'}'

Any ideas how I can rewrite the expression to produce the desired result?  Essentially I'm trying to convert a string to a boolean within JSF.

Thanks, - Dave

[Anton Gavazuk]

<h:selectBooleanCheckbox value="#{emailController.fields.addToENews ==true}" />

2009/10/1 laredotornado <laredotornado@...>

Hi,

I'm using MyFaces 1.1 for a web app deployed in Resin 3.0.19.  This is the
expression I have ...

<h:selectBooleanCheckbox value="#{emailController.fields.addToENews ==
'true'}" />

but when I submit my page containing this, I get the error

Parsed Expression of unsupported type for this operation. Expression class:
org.apache.commons.el.BinaryOperatorExpression. Expression:
'#{emailController.fields.addToENews == 'true'}'

Any ideas how I can rewrite the expression to produce the desired result?
Essentially I'm trying to convert a string to a boolean within JSF.

Thanks, - Dave
--
View this message in context: http://www.nabble.com/Trouble-converting-String-to-boolean-in-JSF-tp25696928p25696928.html
Sent from the MyFaces - Users mailing list archive at Nabble.com.

[laredotornado]

Thanks for your reply but that didn't work.  I changed to what you specified but still get the error

Parsed Expression of unsupported type for this operation. Expression class: org.apache.commons.el.BinaryOperatorExpression. Expression: '#{emailController.fields.addToENews == true}'

upon submitting my form.  Any other advice is appreciated, - Dave

Anton Gavazuk wrote:

<h:selectBooleanCheckbox value="#{emailController.fields.addToENews ==true}"
/>

2009/10/1 laredotornado <[e-mail]>

>
> Hi,
>
> I'm using MyFaces 1.1 for a web app deployed in Resin 3.0.19.  This is the
> expression I have ...
>
> <h:selectBooleanCheckbox value="#{emailController.fields.addToENews ==
> 'true'}" />
>
> but when I submit my page containing this, I get the error
>
> Parsed Expression of unsupported type for this operation. Expression class:
> org.apache.commons.el.BinaryOperatorExpression. Expression:
> '#{emailController.fields.addToENews == 'true'}'
>
> Any ideas how I can rewrite the expression to produce the desired result?
> Essentially I'm trying to convert a string to a boolean within JSF.
>
> Thanks, - Dave
> --
> View this message in context:
> http://www.nabble.com/Trouble-converting-String-to-boolean-in-JSF-tp25696928p25696928.html
> Sent from the MyFaces - Users mailing list archive at Nabble.com.
>
>

[Mike Kienenberger]

"x == y" is a read-only expression, and probably isn't allowed for a
value in <h:selectBooleanCheckbox>.

Why not use value="#{emailController.fields.addToENews}"?

This assumes that 'fields' has a getter for an addToENews property.

On Thu, Oct 1, 2009 at 1:14 PM, laredotornado <laredotornado@...> wrote:

>
> Thanks for your reply but that didn't work.  I changed to what you specified
> but still get the error
>
> Parsed Expression of unsupported type for this operation. Expression class:
> org.apache.commons.el.BinaryOperatorExpression. Expression:
> '#{emailController.fields.addToENews == true}'
>
> upon submitting my form.  Any other advice is appreciated, - Dave
>
>
>
> Anton Gavazuk wrote:
>>
>> <h:selectBooleanCheckbox value="#{emailController.fields.addToENews
>> ==true}"
>> />
>>
>> 2009/10/1 laredotornado <laredotornado@...>
>>
>>>
>>> Hi,
>>>
>>> I'm using MyFaces 1.1 for a web app deployed in Resin 3.0.19.  This is
>>> the
>>> expression I have ...
>>>
>>> <h:selectBooleanCheckbox value="#{emailController.fields.addToENews ==
>>> 'true'}" />
>>>
>>> but when I submit my page containing this, I get the error
>>>
>>> Parsed Expression of unsupported type for this operation. Expression
>>> class:
>>> org.apache.commons.el.BinaryOperatorExpression. Expression:
>>> '#{emailController.fields.addToENews == 'true'}'
>>>
>>> Any ideas how I can rewrite the expression to produce the desired result?
>>> Essentially I'm trying to convert a string to a boolean within JSF.
>>>
>>> Thanks, - Dave
>>> --
>>> View this message in context:
>>> http://www.nabble.com/Trouble-converting-String-to-boolean-in-JSF-tp25696928p25696928.html
>>> Sent from the MyFaces - Users mailing list archive at Nabble.com.
>>>
>>>
>>
>>
>
> --
> View this message in context: http://www.nabble.com/Trouble-converting-String-to-boolean-in-JSF-tp25696928p25703041.html
> Sent from the MyFaces - Users mailing list archive at Nabble.com.
>
>

[Mike Kienenberger]

I realize now that I ignored the whole "addToENews is a string" part
of the email.
What I said is still true, but you probably need a boolean converter
on your  <h:selectBooleanCheckbox>.

On Thu, Oct 1, 2009 at 4:27 PM, Mike Kienenberger <mkienenb@...> wrote:

> "x == y" is a read-only expression, and probably isn't allowed for a
> value in <h:selectBooleanCheckbox>.
>
> Why not use value="#{emailController.fields.addToENews}"?
>
> This assumes that 'fields' has a getter for an addToENews property.
>
> On Thu, Oct 1, 2009 at 1:14 PM, laredotornado <laredotornado@...> wrote:
>>
>> Thanks for your reply but that didn't work.  I changed to what you specified
>> but still get the error
>>
>> Parsed Expression of unsupported type for this operation. Expression class:
>> org.apache.commons.el.BinaryOperatorExpression. Expression:
>> '#{emailController.fields.addToENews == true}'
>>
>> upon submitting my form.  Any other advice is appreciated, - Dave
>>
>>
>>
>> Anton Gavazuk wrote:
>>>
>>> <h:selectBooleanCheckbox value="#{emailController.fields.addToENews
>>> ==true}"
>>> />
>>>
>>> 2009/10/1 laredotornado <laredotornado@...>
>>>
>>>>
>>>> Hi,
>>>>
>>>> I'm using MyFaces 1.1 for a web app deployed in Resin 3.0.19.  This is
>>>> the
>>>> expression I have ...
>>>>
>>>> <h:selectBooleanCheckbox value="#{emailController.fields.addToENews ==
>>>> 'true'}" />
>>>>
>>>> but when I submit my page containing this, I get the error
>>>>
>>>> Parsed Expression of unsupported type for this operation. Expression
>>>> class:
>>>> org.apache.commons.el.BinaryOperatorExpression. Expression:
>>>> '#{emailController.fields.addToENews == 'true'}'
>>>>
>>>> Any ideas how I can rewrite the expression to produce the desired result?
>>>> Essentially I'm trying to convert a string to a boolean within JSF.
>>>>
>>>> Thanks, - Dave
>>>> --
>>>> View this message in context:
>>>> http://www.nabble.com/Trouble-converting-String-to-boolean-in-JSF-tp25696928p25696928.html
>>>> Sent from the MyFaces - Users mailing list archive at Nabble.com.
>>>>
>>>>
>>>
>>>
>>
>> --
>> View this message in context: http://www.nabble.com/Trouble-converting-String-to-boolean-in-JSF-tp25696928p25703041.html
>> Sent from the MyFaces - Users mailing list archive at Nabble.com.
>>
>>
>

[laredotornado]

I see that myfaces includes a BooleanConverter, but when I add this to my faces-config.xml file ...

  <converter>
    <converter-id>booleanConverter</converter-id>
    <converter-class>javax.faces.convert.BooleanConverter</converter-class>
  </converter>

and my selectBooleanCheckbox element is

<h:selectBooleanCheckbox value="#{emailController.fields.addToENews}" converter="booleanConverter" />

but I'm still getting this error upon visiting my page (emailController.fields.addToENews returns a string) ...

java.lang.IllegalArgumentException: Expected submitted value of type Boolean
for Component : {Component-Path : [Class: javax.faces.component.UIViewRoot,ViewId:
/contactInfo.jsp][Class: javax.faces.component.html.HtmlForm,Id: contactInfo][Class:
javax.faces.component.html.HtmlSelectBooleanCheckbox,Id: _idJsp1]}
        at org.apache.myfaces.shared_impl.renderkit.RendererUtils.getBooleanValue(RendererUtils.java:157)
        at org.apache.myfaces.shared_impl.renderkit.html.HtmlCheckboxRendererBase.encodeEnd(HtmlCheckboxRendererBase.java:62)
        at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:539)
        at javax.faces.webapp.UIComponentTag.encodeEnd(UIComponentTag.java:498)
        at javax.faces.webapp.UIComponentTag.doEndTag(UIComponentTag.java:366)
        at _jsp._contactInfo__jsp._jspService(contactInfo.jsp:106)
        at com.caucho.jsp.JavaPage.service(JavaPage.java:60)
        at com.caucho.jsp.Page.pageservice(Page.java:579)
        at com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:175)
        at com.caucho.server.webapp.DispatchFilterChain.doFilter(DispatchFilterChain.java:115)
        at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:229)
        at com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:277)
        at com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:106)
        at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:419)
        at org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:211)
        at org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:41)
        at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:132)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:140)
        at com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:106)
        at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:147)
        at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:70)
        at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:178)
        at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:229)
        at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:268)
        at com.caucho.server.port.TcpConnection.run(TcpConnection.java:389)
        at com.caucho.util.ThreadPool.runTasks(ThreadPool.java:507)
        at com.caucho.util.ThreadPool.run(ThreadPool.java:433)
        at java.lang.Thread.run(Thread.java:613)



How do converters work? - Dave

Mike Kienenberger wrote:

I realize now that I ignored the whole "addToENews is a string" part
of the email.
What I said is still true, but you probably need a boolean converter
on your  <h:selectBooleanCheckbox>.

On Thu, Oct 1, 2009 at 4:27 PM, Mike Kienenberger <[e-mail]> wrote:
> "x == y" is a read-only expression, and probably isn't allowed for a
> value in <h:selectBooleanCheckbox>.
>
> Why not use value="#{emailController.fields.addToENews}"?
>
> This assumes that 'fields' has a getter for an addToENews property.
>
> On Thu, Oct 1, 2009 at 1:14 PM, laredotornado <[e-mail]> wrote:
>>
>> Thanks for your reply but that didn't work.  I changed to what you specified
>> but still get the error
>>
>> Parsed Expression of unsupported type for this operation. Expression class:
>> org.apache.commons.el.BinaryOperatorExpression. Expression:
>> '#{emailController.fields.addToENews == true}'
>>
>> upon submitting my form.  Any other advice is appreciated, - Dave
>>
>>
>>
>> Anton Gavazuk wrote:
>>>
>>> <h:selectBooleanCheckbox value="#{emailController.fields.addToENews
>>> ==true}"
>>> />
>>>
>>> 2009/10/1 laredotornado <[e-mail]>
>>>
>>>>
>>>> Hi,
>>>>
>>>> I'm using MyFaces 1.1 for a web app deployed in Resin 3.0.19.  This is
>>>> the
>>>> expression I have ...
>>>>
>>>> <h:selectBooleanCheckbox value="#{emailController.fields.addToENews ==
>>>> 'true'}" />
>>>>
>>>> but when I submit my page containing this, I get the error
>>>>
>>>> Parsed Expression of unsupported type for this operation. Expression
>>>> class:
>>>> org.apache.commons.el.BinaryOperatorExpression. Expression:
>>>> '#{emailController.fields.addToENews == 'true'}'
>>>>
>>>> Any ideas how I can rewrite the expression to produce the desired result?
>>>> Essentially I'm trying to convert a string to a boolean within JSF.
>>>>
>>>> Thanks, - Dave
>>>> --
>>>> View this message in context:
>>>> http://www.nabble.com/Trouble-converting-String-to-boolean-in-JSF-tp25696928p25696928.html
>>>> Sent from the MyFaces - Users mailing list archive at Nabble.com.
>>>>
>>>>
>>>
>>>
>>
>> --
>> View this message in context: http://www.nabble.com/Trouble-converting-String-to-boolean-in-JSF-tp25696928p25703041.html
>> Sent from the MyFaces - Users mailing list archive at Nabble.com.
>>
>>
>

[Mike Kienenberger]

First off, booleanConverter is already defined in the standard
faces-config.xml file, so you don't need to define it again.

The problem is that  <h:selectBooleanCheckbox> expects the getter to
return a boolean already, not a String.

I know I hit this problem years ago in the past, but I don't remember
how I solved it.

But one creative alternative might be this, assuming that this is a
display-only control, not something that will allow the value to be
changed:

<h:selectBooleanCheckbox
rendered="#{emailController.fields.addToENews=='true'}"
value="#{true}"/>
<h:selectBooleanCheckbox rendered="#{emailController.fields.addToENews!='true'}"
 value="#{false}"/>

I don't know if that will work any better, though.

The easiest, but probably not the cleanest, solution is to create

public boolean getAddToENewsAsBoolean()
{
      String x = this.addToENews());
      if (x ....) return true;
      else return false;
}

Then

<h:selectBooleanCheckbox value="#{emailController.fields.addToENewsAsBoolean}"/>

You  might also take a look at the sandbox:convertBoolean tag.

http://wiki.apache.org/myfaces/ConvertBoolean

The problem is that an html checkbox is an input that doesn't take a
standard value=true/false.  Instead, it takes a checked=checked value
if true or nothing if false.   So I'm not certain what a converter
would have to return to feed it values.

Normally a converter takes arbitrary java data and converts it to a
String representation that is used by the html value attribute, then
reverses that transformation to submit the value back to the
application.   You'd probably have to look at the
<h:selectBooleanCheckbox> source to see what it does and if there's a
way to provide a non-boolean input to it.

Maybe a facelets function to convert your strings into booleans could
help, but again, that's probably a read-only value provider, and you'd
get the same error you had in the first place.

On Thu, Oct 1, 2009 at 5:30 PM, laredotornado <laredotornado@...> wrote:

>
> I see that myfaces includes a BooleanConverter, but when I add this to my
> faces-config.xml file ...
>
>  <converter>
>    <converter-id>booleanConverter</converter-id>
>    <converter-class>javax.faces.convert.BooleanConverter</converter-class>
>  </converter>
>
> and my selectBooleanCheckbox element is
>
> <h:selectBooleanCheckbox value="#{emailController.fields.addToENews}"
> converter="booleanConverter" />
>
> but I'm still getting this error upon visiting my page
> (emailController.fields.addToENews returns a string) ...
>
> java.lang.IllegalArgumentException: Expected submitted value of type Boolean
> for Component : {Component-Path : [Class:
> javax.faces.component.UIViewRoot,ViewId:
> /contactInfo.jsp][Class: javax.faces.component.html.HtmlForm,Id:
> contactInfo][Class:
> javax.faces.component.html.HtmlSelectBooleanCheckbox,Id: _idJsp1]}
>        at
> org.apache.myfaces.shared_impl.renderkit.RendererUtils.getBooleanValue(RendererUtils.java:157)
>        at
> org.apache.myfaces.shared_impl.renderkit.html.HtmlCheckboxRendererBase.encodeEnd(HtmlCheckboxRendererBase.java:62)
>        at
> javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:539)
>        at javax.faces.webapp.UIComponentTag.encodeEnd(UIComponentTag.java:498)
>        at javax.faces.webapp.UIComponentTag.doEndTag(UIComponentTag.java:366)
>        at _jsp._contactInfo__jsp._jspService(contactInfo.jsp:106)
>        at com.caucho.jsp.JavaPage.service(JavaPage.java:60)
>        at com.caucho.jsp.Page.pageservice(Page.java:579)
>        at
> com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:175)
>        at
> com.caucho.server.webapp.DispatchFilterChain.doFilter(DispatchFilterChain.java:115)
>        at
> com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:229)
>        at
> com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:277)
>        at
> com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:106)
>        at
> org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:419)
>        at
> org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:211)
>        at
> org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:41)
>        at
> org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:132)
>        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:140)
>        at
> com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:106)
>        at
> org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:147)
>        at
> com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:70)
>        at
> com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:178)
>        at
> com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:229)
>        at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:268)
>        at com.caucho.server.port.TcpConnection.run(TcpConnection.java:389)
>        at com.caucho.util.ThreadPool.runTasks(ThreadPool.java:507)
>        at com.caucho.util.ThreadPool.run(ThreadPool.java:433)
>        at java.lang.Thread.run(Thread.java:613)
>
>
>
> How do converters work? - Dave
>
>
>
>
> Mike Kienenberger wrote:
>>
>> I realize now that I ignored the whole "addToENews is a string" part
>> of the email.
>> What I said is still true, but you probably need a boolean converter
>> on your  <h:selectBooleanCheckbox>.
>>
>> On Thu, Oct 1, 2009 at 4:27 PM, Mike Kienenberger <mkienenb@...>
>> wrote:
>>> "x == y" is a read-only expression, and probably isn't allowed for a
>>> value in <h:selectBooleanCheckbox>.
>>>
>>> Why not use value="#{emailController.fields.addToENews}"?
>>>
>>> This assumes that 'fields' has a getter for an addToENews property.
>>>
>>> On Thu, Oct 1, 2009 at 1:14 PM, laredotornado <laredotornado@...>
>>> wrote:
>>>>
>>>> Thanks for your reply but that didn't work.  I changed to what you
>>>> specified
>>>> but still get the error
>>>>
>>>> Parsed Expression of unsupported type for this operation. Expression
>>>> class:
>>>> org.apache.commons.el.BinaryOperatorExpression. Expression:
>>>> '#{emailController.fields.addToENews == true}'
>>>>
>>>> upon submitting my form.  Any other advice is appreciated, - Dave
>>>>
>>>>
>>>>
>>>> Anton Gavazuk wrote:
>>>>>
>>>>> <h:selectBooleanCheckbox value="#{emailController.fields.addToENews
>>>>> ==true}"
>>>>> />
>>>>>
>>>>> 2009/10/1 laredotornado <laredotornado@...>
>>>>>
>>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> I'm using MyFaces 1.1 for a web app deployed in Resin 3.0.19.  This is
>>>>>> the
>>>>>> expression I have ...
>>>>>>
>>>>>> <h:selectBooleanCheckbox value="#{emailController.fields.addToENews ==
>>>>>> 'true'}" />
>>>>>>
>>>>>> but when I submit my page containing this, I get the error
>>>>>>
>>>>>> Parsed Expression of unsupported type for this operation. Expression
>>>>>> class:
>>>>>> org.apache.commons.el.BinaryOperatorExpression. Expression:
>>>>>> '#{emailController.fields.addToENews == 'true'}'
>>>>>>
>>>>>> Any ideas how I can rewrite the expression to produce the desired
>>>>>> result?
>>>>>> Essentially I'm trying to convert a string to a boolean within JSF.
>>>>>>
>>>>>> Thanks, - Dave
>>>>>> --
>>>>>> View this message in context:
>>>>>> http://www.nabble.com/Trouble-converting-String-to-boolean-in-JSF-tp25696928p25696928.html
>>>>>> Sent from the MyFaces - Users mailing list archive at Nabble.com.
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>
>>>> --
>>>> View this message in context:
>>>> http://www.nabble.com/Trouble-converting-String-to-boolean-in-JSF-tp25696928p25703041.html
>>>> Sent from the MyFaces - Users mailing list archive at Nabble.com.
>>>>
>>>>
>>>
>>
>>
>
> --
> View this message in context: http://www.nabble.com/Trouble-converting-String-to-boolean-in-JSF-tp25696928p25706851.html
> Sent from the MyFaces - Users mailing list archive at Nabble.com.
>
>