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Posted to user@commons.apache.org by Peter Nabbefeld <Pe...@gmx.de> on 2004/08/01 14:27:08 UTC
[Jelly/Jexl] How to add two int values?
Hi,
I'm trying to write a Jelly script for Maven. I've tried "${x + y}" and
"${x} + ${y}" as the value argument, both don't work for me. I don't
know, if this is a problem with the archaic versions, Maven uses (e.g.
ant 1.5.3), or if it is a problem with Jelly/Jexl. If it is a solved
problem, please give me the right syntax, so I can file a bug for Maven.
Kind regards
Peter Nabbefeld
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Re: [Jelly/Jexl] How to add two int values?
Posted by Paul Libbrecht <pa...@activemath.org>.
I agree sometimes casting is surprising in jexl and jelly... making
this clear would be a strong contribution for the maturity of both.
When I get stuck with these, I solve it using another annoyance: the
minus sign.
It's as simple as that: ${x+y-0} will always be a number or throw if x
or y cannot be made to a number.
Do note that "null" may be made into "0", I fear.
paul
Le 1 août 04, à 14:27, Peter Nabbefeld a écrit :
> I'm trying to write a Jelly script for Maven. I've tried "${x + y}"
> and "${x} + ${y}" as the value argument, both don't work for me. I
> don't know, if this is a problem with the archaic versions, Maven uses
> (e.g. ant 1.5.3), or if it is a problem with Jelly/Jexl. If it is a
> solved problem, please give me the right syntax, so I can file a bug
> for Maven.
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Re: [Jelly/Jexl] How to add two int values?
Posted by Peter Nabbefeld <Pe...@gmx.de>.
Dion Gillard schrieb:
> This works for me:
>
> result is '${1 + 2}'
> <set var="x" value="3"/>
> <set var="y" value="4"/>
> result is '${x + y}'
>
> Can you simplify your example?
>
Thank You!
Your example worked for me, too, so I can now look, why the other
doesn't work. Most important for me, that I've an example for the
correct syntax, and now I know it *must* work - I've a better chance to
fix it now.
Thank You for Your help!
Peter
> On Sun, 01 Aug 2004 15:13:10 +0200, Peter Nabbefeld
> <pe...@gmx.de> wrote:
>
>>I've asked to add two int values. Here's some of the code (I've tried
>>different versions - without success):
>>
>><j:forEach var="line" items="${pluginIncludeTags}">
>> <echo>line = ${line}</echo>
>> <j:set var="_cpos" value="${line.indexOf(':')}"/>
>> <!-- j:invokeStatic var="_cpos" className="java.lang.Integer"
>>method="parseInt">
>> <j:arg type="java.lang.String" value="${line.indexOf(':')}"/>
>> </j:invokeStatic -->
>> <!-- j:set var="_pos"
>>value="${java.lang.Integer.parseInt(line.substring(0, _cpos))}"/ -->
>> <j:invokeStatic var="_pos" className="java.lang.Integer"
>>method="parseInt">
>> <j:arg type="java.lang.String" value="${line.substring(0, _cpos)}"/>
>> </j:invokeStatic>
>> <j:set var="_lineDir" value="${line.substring(_cpos, _cpos + _pos)}"/>
>> <!-- j:invoke var="_lineDir" method="substring" on="${line}">
>> <j:arg type="int" value="${_cpos)}"/>
>> <j:arg type="int"><j:expr value="_cpos + _pos"/></j:arg>
>> </j:invoke -->
>>
>>Peter
>>
>>Dion Gillard schrieb:
>>
>>
>>
>>
>>>What types are x and y?
>>>
>>>On Sun, 01 Aug 2004 14:27:08 +0200, Peter Nabbefeld
>>><pe...@gmx.de> wrote:
>>>
>>>
>>>>Hi,
>>>>
>>>>I'm trying to write a Jelly script for Maven. I've tried "${x + y}" and
>>>>"${x} + ${y}" as the value argument, both don't work for me. I don't
>>>>know, if this is a problem with the archaic versions, Maven uses (e.g.
>>>>ant 1.5.3), or if it is a problem with Jelly/Jexl. If it is a solved
>>>>problem, please give me the right syntax, so I can file a bug for Maven.
>>>>
>>>>Kind regards
>>>>
>>>>Peter Nabbefeld
>>>>
>>>>---------------------------------------------------------------------
>>>>To unsubscribe, e-mail: commons-user-unsubscribe@jakarta.apache.org
>>>>For additional commands, e-mail: commons-user-help@jakarta.apache.org
>>>>
>>>>
>>>
>>>
>>>
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>>
>>
>
>
>
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Re: [Jelly/Jexl] How to add two int values?
Posted by Dion Gillard <di...@gmail.com>.
This works for me:
result is '${1 + 2}'
<set var="x" value="3"/>
<set var="y" value="4"/>
result is '${x + y}'
Can you simplify your example?
On Sun, 01 Aug 2004 15:13:10 +0200, Peter Nabbefeld
<pe...@gmx.de> wrote:
> I've asked to add two int values. Here's some of the code (I've tried
> different versions - without success):
>
> <j:forEach var="line" items="${pluginIncludeTags}">
> <echo>line = ${line}</echo>
> <j:set var="_cpos" value="${line.indexOf(':')}"/>
> <!-- j:invokeStatic var="_cpos" className="java.lang.Integer"
> method="parseInt">
> <j:arg type="java.lang.String" value="${line.indexOf(':')}"/>
> </j:invokeStatic -->
> <!-- j:set var="_pos"
> value="${java.lang.Integer.parseInt(line.substring(0, _cpos))}"/ -->
> <j:invokeStatic var="_pos" className="java.lang.Integer"
> method="parseInt">
> <j:arg type="java.lang.String" value="${line.substring(0, _cpos)}"/>
> </j:invokeStatic>
> <j:set var="_lineDir" value="${line.substring(_cpos, _cpos + _pos)}"/>
> <!-- j:invoke var="_lineDir" method="substring" on="${line}">
> <j:arg type="int" value="${_cpos)}"/>
> <j:arg type="int"><j:expr value="_cpos + _pos"/></j:arg>
> </j:invoke -->
>
> Peter
>
> Dion Gillard schrieb:
>
>
>
> > What types are x and y?
> >
> > On Sun, 01 Aug 2004 14:27:08 +0200, Peter Nabbefeld
> > <pe...@gmx.de> wrote:
> >
> >>Hi,
> >>
> >>I'm trying to write a Jelly script for Maven. I've tried "${x + y}" and
> >>"${x} + ${y}" as the value argument, both don't work for me. I don't
> >>know, if this is a problem with the archaic versions, Maven uses (e.g.
> >>ant 1.5.3), or if it is a problem with Jelly/Jexl. If it is a solved
> >>problem, please give me the right syntax, so I can file a bug for Maven.
> >>
> >>Kind regards
> >>
> >>Peter Nabbefeld
> >>
> >>---------------------------------------------------------------------
> >>To unsubscribe, e-mail: commons-user-unsubscribe@jakarta.apache.org
> >>For additional commands, e-mail: commons-user-help@jakarta.apache.org
> >>
> >>
> >
> >
> >
>
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>
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Re: [Jelly/Jexl] How to add two int values?
Posted by Peter Nabbefeld <Pe...@gmx.de>.
I've asked to add two int values. Here's some of the code (I've tried
different versions - without success):
<j:forEach var="line" items="${pluginIncludeTags}">
<echo>line = ${line}</echo>
<j:set var="_cpos" value="${line.indexOf(':')}"/>
<!-- j:invokeStatic var="_cpos" className="java.lang.Integer"
method="parseInt">
<j:arg type="java.lang.String" value="${line.indexOf(':')}"/>
</j:invokeStatic -->
<!-- j:set var="_pos"
value="${java.lang.Integer.parseInt(line.substring(0, _cpos))}"/ -->
<j:invokeStatic var="_pos" className="java.lang.Integer"
method="parseInt">
<j:arg type="java.lang.String" value="${line.substring(0, _cpos)}"/>
</j:invokeStatic>
<j:set var="_lineDir" value="${line.substring(_cpos, _cpos + _pos)}"/>
<!-- j:invoke var="_lineDir" method="substring" on="${line}">
<j:arg type="int" value="${_cpos)}"/>
<j:arg type="int"><j:expr value="_cpos + _pos"/></j:arg>
</j:invoke -->
Peter
Dion Gillard schrieb:
> What types are x and y?
>
> On Sun, 01 Aug 2004 14:27:08 +0200, Peter Nabbefeld
> <pe...@gmx.de> wrote:
>
>>Hi,
>>
>>I'm trying to write a Jelly script for Maven. I've tried "${x + y}" and
>>"${x} + ${y}" as the value argument, both don't work for me. I don't
>>know, if this is a problem with the archaic versions, Maven uses (e.g.
>>ant 1.5.3), or if it is a problem with Jelly/Jexl. If it is a solved
>>problem, please give me the right syntax, so I can file a bug for Maven.
>>
>>Kind regards
>>
>>Peter Nabbefeld
>>
>>---------------------------------------------------------------------
>>To unsubscribe, e-mail: commons-user-unsubscribe@jakarta.apache.org
>>For additional commands, e-mail: commons-user-help@jakarta.apache.org
>>
>>
>
>
>
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Re: [Jelly/Jexl] How to add two int values?
Posted by Dion Gillard <di...@gmail.com>.
What types are x and y?
On Sun, 01 Aug 2004 14:27:08 +0200, Peter Nabbefeld
<pe...@gmx.de> wrote:
>
> Hi,
>
> I'm trying to write a Jelly script for Maven. I've tried "${x + y}" and
> "${x} + ${y}" as the value argument, both don't work for me. I don't
> know, if this is a problem with the archaic versions, Maven uses (e.g.
> ant 1.5.3), or if it is a problem with Jelly/Jexl. If it is a solved
> problem, please give me the right syntax, so I can file a bug for Maven.
>
> Kind regards
>
> Peter Nabbefeld
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: commons-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: commons-user-help@jakarta.apache.org
>
>
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