Re: [json-lib-user] StringMetaClass Problem

[Andres A. <aal...@ya...>]

Hi Andrew,

The code should work with 1.5.0, as a matter of fact a bug in DelegatingMetaClass was fixed to get it working. 
Perhaps something was changed again in 1.5.1, I'll give it a look and let you know.

Cheers,
Andres
 
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----- Original Message ----
From: Andrew Strickland <str...@gm...>
To: jso...@li...
Sent: Monday, January 7, 2008 9:09:38 AM
Subject: [json-lib-user] StringMetaClass Problem


Hello,

I'm having a problem using the JsonGroovyBuilder.  I'm using Json-lib 2.2 and Groovy 1.5.1, they are declared in my POM like so:

<dependency>
         <groupId>net.sf.json-lib</groupId>

         <artifactId>json-lib</artifactId>
         <version>2.2</version>
         <classifier>jdk15</classifier>
</dependency>

<dependency>
         <groupId>
org.codehaus.groovy</groupId>
         <artifactId>groovy-all</artifactId>
         <version>1.5.1</version>
</dependency>

Here's the snippet from my groovy script where I try to do the json creation:


def builder = new JsonGroovyBuilder();

    if (searchResponse != null) {
        def orders = builder.orders{
            for(ord in ords){
                order{
                    tsrNumber = 
ord.getTsrNumber() 
                    tsoNumber = ord.getTsrNumber()
                    ccsd = ord.getCcsdNumber()
                    status = ord.getStatus()
                }
            }
        }

    }

I get the following exception:

ERROR [Groovy] - Servlet.service() for servlet Groovy threw exception
java.lang.NoSuchMethodException: groovy.runtime.metaclass.java.lang.StringMetaCl
ass.<init>(
groovy.lang.MetaClassRegistry, java.lang.Class)
        at java.lang.Class.getConstructor0(Unknown Source)
        at java.lang.Class.getConstructor(Unknown Source)
        at groovy.lang.MetaClassRegistry.getMetaClassFor
(MetaClassRegistry.java:
205)
        at groovy.lang.MetaClassRegistry.getMetaClass(MetaClassRegistry.java:135
)
        at org.codehaus.groovy.runtime.Invoker.invokeMethod(Invoker.java:118)
        at org.codehaus.groovy.runtime.InvokerHelper.invokeMethod
(InvokerHelper.
java:111)
        at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodN(Scrip
tBytecodeAdapter.java:187)
        at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.isCase(ScriptByteco

deAdapter.java:715)
        at proxy.proxy(proxy.groovy:27)
        at gjdk.proxy_GroovyReflector.invoke(Unknown Source)
        at groovy.lang.MetaMethod.invoke(MetaMethod.java:115)
        at org.codehaus.groovy.runtime.MetaClassHelper.doMethodInvoke
(MetaClassH
elper.java:713)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:560)
        at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnCurre
ntN(ScriptBytecodeAdapter.java
:97)
        at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnCurre
nt0(ScriptBytecodeAdapter.java:129)
        at proxy.run(proxy.groovy:15)
        at groovy.util.GroovyScriptEngine.run(GroovyScriptEngine.java
:378)
        at groovy.servlet.GroovyServlet$1.call(GroovyServlet.java:135)
        at org.codehaus.groovy.runtime.GroovyCategorySupport.use(GroovyCategoryS
upport.java:149)
        at groovy.servlet.GroovyServlet.service
(GroovyServlet.java:144)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:269)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:188)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:213)
        at org.apache.catalina.core.StandardContextValve.invoke
(StandardContextV
alve.java:174)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:127)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:117)

        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:108)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:151)
        at org.apache.coyote.http11.Http11Processor.process
(Http11Processor.java
:874)
        at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.p
rocessConnection(Http11BaseProtocol.java:665)
        at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket
(PoolTcpEndpo
int.java:528)
        at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFol
lowerWorkerThread.java:81)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadP

ool.java:689)
        at java.lang.Thread.run(Unknown Source)

I checked the json-lib source browser for StringMetaClass and noticed a difference between revision 1.1 and 1.2, you can see it here: 
http://json-lib.cvs.sourceforge.net/json-lib/json-lib/src/main/groovy/groovy/runtime/metaclass/java/lang/StringMetaClass.groovy?r1=1.1&r2=1.2.  
Notice that the constructor that took a MetaClassRegistry and Class is now gone...and that appears to be the constructor that Groovy is trying to instantiate.  Anyone have any idea why this is happening, if there is a fix for it, or how I can get around it?








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