Jetty - Java HTTP Servlet Server

Jack,

The failure is with how you are applying the config.   The XML looks good,
but the object you are applying it to - MyServer - does not appear
to have a setDate method?



Jack wrote:
> Hi, I'm using org.mortbay.xml.XmlConfiguration class to read and parse an xml 
> configuration file.
> I want to execute the following statement:
> 
> o.setDate((new java.text.SimpleDateFormat("MM-yyyy")).parse("07-2004", new 
> java.text.ParsePosition(0)));
> 
> where o is an object to be configured. Thus I wrote the following xml section:
> 
> <Call name="setDate">
> <Arg>
>   <New class="java.text.SimpleDateFormat">  
> 	<Arg>MM-yyyy</Arg>
> 	<Call name="parse">
> 		<Arg>07-2003</Arg>
> 		<Arg><New class="java.text.ParsePosition"><Arg 
> type="int">0</Arg></New></Arg>
> 	</Call>
>   </New>
> </Arg>
> </Call>
> 
> but I got the following exception:
> 
> java.lang.IllegalStateException: No Method: <Call name="setDate"><Arg>
> 							  <New 
> class="java.text.SimpleDateFormat"><Arg>MM-yyyy</Arg><Call name="parse"><Arg>07-
> 2003</Arg><Arg><New class="java.text.ParsePosition"><Arg 
> type="int">0</Arg></New></Arg></Call></New>
> 						   </Arg></Call> on class 
> MyServer
> 	at org.mortbay.xml.XmlConfiguration.call(XmlConfiguration.java:559)
> 	at org.mortbay.xml.XmlConfiguration.configure(XmlConfiguration.java:260)
> 	at org.mortbay.xml.XmlConfiguration.newObj(XmlConfiguration.java:626)
> 	at org.mortbay.xml.XmlConfiguration.itemValue(XmlConfiguration.java:923)
> 	at org.mortbay.xml.XmlConfiguration.value(XmlConfiguration.java:829)
> 	at org.mortbay.xml.XmlConfiguration.call(XmlConfiguration.java:526)
> 	at org.mortbay.xml.XmlConfiguration.configure(XmlConfiguration.java:260)
> 	at org.mortbay.xml.XmlConfiguration.get(XmlConfiguration.java:459)
> 	at org.mortbay.xml.XmlConfiguration.configure(XmlConfiguration.java:262)
> 	at org.mortbay.xml.XmlConfiguration.call(XmlConfiguration.java:554)
> 	at org.mortbay.xml.XmlConfiguration.itemValue(XmlConfiguration.java:919)
> 	at org.mortbay.xml.XmlConfiguration.value(XmlConfiguration.java:829)
> 	at org.mortbay.xml.XmlConfiguration.set(XmlConfiguration.java:287)
> 	at org.mortbay.xml.XmlConfiguration.configure(XmlConfiguration.java:256)
> 	at org.mortbay.xml.XmlConfiguration.configure(XmlConfiguration.java:192)
> 	at ChartProcessor.<init>(ChartProcessor.java:99)
> 	at ChartProcessor.<init>(ChartProcessor.java:72)
> 	at ChartProcessor.main(ChartProcessor.java:177)
> 
> How should I correctly translate that statement into XML?
> Thank you in advance for any help
> 
> 
> 
> -------------------------------------------------------
> This SF.Net email is sponsored by OSTG. Have you noticed the changes on
> Linux.com, ITManagersJournal and NewsForge in the past few weeks? Now,
> one more big change to announce. We are now OSTG- Open Source Technology
> Group. Come see the changes on the new OSTG site. http://www.ostg.com

Greg Wilkins <gregw <at> mortbay.com> writes:

> 
> Jack,
> 
> The failure is with how you are applying the config.   The XML looks good,
> but the object you are applying it to - MyServer - does not appear
> to have a setDate method?
> 

It has that method:

	public void setDate(Date date) {
		execDate = date;
	}

but looking at the error message, the parser seems to take as the actual
parameter the object java.text.SimpleDateFormat inside the <new> tag, instead of
the object Date returned by the method parse() in the nested call.
Regards

I need more context.

What are you applying the XML snippet to?  How is it invoked etc.

Can you send more of the XML config file and the code you use to invoke it.

cheers


Jack wrote:
> Greg Wilkins <gregw <at> mortbay.com> writes:
> 
> 
>>Jack,
>>
>>The failure is with how you are applying the config.   The XML looks good,
>>but the object you are applying it to - MyServer - does not appear
>>to have a setDate method?
>>
> 
> 
> It has that method:
> 
> 	public void setDate(Date date) {
> 		execDate = date;
> 	}
> 
> but looking at the error message, the parser seems to take as the actual
> parameter the object java.text.SimpleDateFormat inside the <new> tag, instead of
> the object Date returned by the method parse() in the nested call.
> Regards
> 
> 
> 
> -------------------------------------------------------
> This SF.Net email is sponsored by OSTG. Have you noticed the changes on
> Linux.com, ITManagersJournal and NewsForge in the past few weeks? Now,
> one more big change to announce. We are now OSTG- Open Source Technology
> Group. Come see the changes on the new OSTG site. http://www.ostg.com

Greg Wilkins <gregw <at> mortbay.com> writes:

> 
> I need more context.
> 
> What are you applying the XML snippet to?  How is it invoked etc.
> 
> Can you send more of the XML config file and the code you use to invoke it.
> 
> cheers
> 

Hi Greg, thank you for your support, I really appreciate it! I could provide
the information you requested, but I wonder if they are really meanful. I took
a look to the source of the newObj() method in class XmlConfiguration:

[cut]
        // Lets just try all constructors for now
        Constructor[] constructors = oClass.getConstructors();
        for (int c=0;constructors!=null && c<constructors.length;c++)
        {
            if (constructors[c].getParameterTypes().length!=size)
                continue;

            Object n=null;
            boolean called=false;
            try{
                n=constructors[c].newInstance(arg);
                called=true;
            }
            catch(IllegalAccessException e)
            {if(Code.verbose(Integer.MAX_VALUE))Code.ignore(e);}
            catch(InstantiationException e)
            {if(Code.verbose(Integer.MAX_VALUE))Code.ignore(e);}
            catch(IllegalArgumentException e)
            {if(Code.verbose(Integer.MAX_VALUE))Code.ignore(e);}
            if(called)
            {
                configure(n,node,argi);
                return n;
            }
        }

        throw new IllegalStateException("No Constructor: "+node+" on "+obj);
    }

Any <call> tag inside the <new> element is managed in the configure(n,node,argi)
statement, which returns void, thus any nested object is lost!
That is, in my case:

  <New class="java.text.SimpleDateFormat">  
	<Arg>MM-yyyy</Arg>
	<Call name="parse">
		<Arg>07-2003</Arg>
		<Arg>
			<New class="java.text.ParsePosition">
				<Arg type="int">0 </Arg>
			</New>
		</Arg>
	</Call>
  </New>

the newObj() method returns an object of class SimpleDateFormat, whatever
happens in the nested call to the method parse().
What I'm looking for is a workaround to save the Date object rturned by the
method.
bye

Jack,

the way that jetty config works is as follows:


    <new class="classA">
       <arg>Arg to classA constructor</arg>
       
       <!-- stuff after the args applies to the new classA instance -->

       <call name="methodOnClassA">
          <arg>arg to classA.methodOnClassA</arg>
 
          <!-- stuff after the args applies to any return type of methodOnClassA -->

       </call>

       <!-- we have popped scope here and are back to working on classA instance -->
    </new>



Jack wrote:
> Greg Wilkins <gregw <at> mortbay.com> writes:
> 
> 
>>I need more context.
>>
>>What are you applying the XML snippet to?  How is it invoked etc.
>>
>>Can you send more of the XML config file and the code you use to invoke it.
>>
>>cheers
>>
> 
> 
> Hi Greg, thank you for your support, I really appreciate it! I could provide
> the information you requested, but I wonder if they are really meanful. I took
> a look to the source of the newObj() method in class XmlConfiguration:
> 
> [cut]
>         // Lets just try all constructors for now
>         Constructor[] constructors = oClass.getConstructors();
>         for (int c=0;constructors!=null && c<constructors.length;c++)
>         {
>             if (constructors[c].getParameterTypes().length!=size)
>                 continue;
> 
>             Object n=null;
>             boolean called=false;
>             try{
>                 n=constructors[c].newInstance(arg);
>                 called=true;
>             }
>             catch(IllegalAccessException e)
>             {if(Code.verbose(Integer.MAX_VALUE))Code.ignore(e);}
>             catch(InstantiationException e)
>             {if(Code.verbose(Integer.MAX_VALUE))Code.ignore(e);}
>             catch(IllegalArgumentException e)
>             {if(Code.verbose(Integer.MAX_VALUE))Code.ignore(e);}
>             if(called)
>             {
>                 configure(n,node,argi);
>                 return n;
>             }
>         }
> 
>         throw new IllegalStateException("No Constructor: "+node+" on "+obj);
>     }
> 
> Any <call> tag inside the <new> element is managed in the configure(n,node,argi)
> statement, which returns void, thus any nested object is lost!
> That is, in my case:
> 
>   <New class="java.text.SimpleDateFormat">  
> 	<Arg>MM-yyyy</Arg>
> 	<Call name="parse">
> 		<Arg>07-2003</Arg>
> 		<Arg>
> 			<New class="java.text.ParsePosition">
> 				<Arg type="int">0 </Arg>
> 			</New>
> 		</Arg>
> 	</Call>
>   </New>
> 
> the newObj() method returns an object of class SimpleDateFormat, whatever
> happens in the nested call to the method parse().
> What I'm looking for is a workaround to save the Date object rturned by the
> method.
> bye
> 
> 
> 
> -------------------------------------------------------
> SF.Net email is sponsored by Shop4tech.com-Lowest price on Blank Media
> 100pk Sonic DVD-R 4x for only $29 -100pk Sonic DVD+R for only $33
> Save 50% off Retail on Ink & Toner - Free Shipping and Free Gift.
> http://www.shop4tech.com/z/Inkjet_Cartridges/9_108_r285