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Caught: groovy.lang.MissingPropertyException while excuting my DSL

 
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package stack

/**
* Created by IntelliJ IDEA.
* User: aninath
* Date: 9/20/11
* Time: 3:40 PM
* To change this template use File | Settings | File Templates.
*/
class EmployeeDSL {

Employee root

List propchain = []

EmployeeDSL( Employee root ) {
this.root = root
}

def propertyMissing( String name ) {
// if name is 'add' and we have a chain of names
if( name == 'add' && propchain ) {
println("inside if--> "+name)
// add a new employee
root.empList << new EmployeeData( firstName:propchain.take( 1 ).join( ' ' ), lastName:propchain.drop( 1 ).join( ' ' ) )
// and reset the chain of names
propchain = []
}
else {
// add this name to the chain of names
println("inside else--> "+name)

propchain << name
this
}
}

static void main(args) {
Employee emp = new Employee( [] )

new EmployeeDSL( emp ).with {
anish.nath.add
//tim.yates.add
"4"."nath".add // this is the pont where exception throws
}

emp.empList.each {
println it.firstName
println it.lastName
}

}

}


class Employee {
List<EmployeeData> empList = []

Employee( List<EmployeeData> list ) {
empList = list
}
}
// #@groovy.transform.Canonical
class EmployeeData {
String firstName
String lastName
}



Exception in thread "main" groovy.lang.MissingPropertyException: No such property: nath for class: java.lang.String
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:50)
at org.codehaus.groovy.runtime.callsite.GetEffectivePojoPropertySite.getProperty(GetEffectivePojoPropertySite.java:63)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGetProperty(AbstractCallSite.java:227)
at stack.EmployeeDSL$_main_closure1.doCall(EmployeeDSL.groovy:44)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:272)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:883)
at groovy.lang.Closure.call(Closure.java:410)
at groovy.lang.Closure.call(Closure.java:423)
at org.codehaus.groovy.runtime.DefaultGroovyMethods.with(DefaultGroovyMethods.java:194)
at org.codehaus.groovy.runtime.dgm$876.invoke(Unknown Source)
at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoMetaMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:308)
at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.call(PogoMetaMethodSite.java:64)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
at stack.EmployeeDSL.main(EmployeeDSL.groovy:41)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)

Process finished with exit code 1


new EmployeeDSL( emp ).with {
anish.nath.add
//tim.yates.add
"4"."nath".add // this is the pont where exception throws if i comment this line my programe will be fine can any one suggest what code i have to change
}
 
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