org.apache.xmlrpc.metadata
Interface XmlRpcListableHandlerMapping

All Superinterfaces:

XmlRpcHandlerMapping

All Known Implementing Classes:

AbstractReflectiveHandlerMapping, PropertyHandlerMapping

public interface XmlRpcListableHandlerMapping
extends XmlRpcHandlerMapping

A listable handler mapping is able to provide support for XML-RPC meta data, as specified here.

See Also:

Specification of XML-RPC introspection

Method Summary

java.lang.String[]	getListMethods() This method implements the introspection method system.listMethods, which is specified as follows: This method may be used to enumerate the methods implemented by the XML-RPC server.
java.lang.String	getMethodHelp(java.lang.String pHandlerName) This method implements the introspection method system.methodSignature, which is specified as follows: This method takes one parameter, the name of a method implemented by the XML-RPC server.
java.lang.String[][]	getMethodSignature(java.lang.String pHandlerName) This method implements the introspection method system.methodSignature, which is specified as follows: This method takes one parameter, the name of a method implemented by the XML-RPC server.

Methods inherited from interface org.apache.xmlrpc.server.XmlRpcHandlerMapping

getHandler

Method Detail

getListMethods

java.lang.String[] getListMethods()
                                  throws XmlRpcException

This method implements the introspection method system.listMethods, which is specified as follows:

This method may be used to enumerate the methods implemented by the XML-RPC server.

The system.listMethods method requires no parameters. It returns an array of strings, each of which is the name of a method implemented by the server.

Note, that the specification doesn't require that the list must be exhaustive. We conclude, that a valid method "handlerName" doesn't need to be in the list. For example, a handler, which implements XmlRpcHandler, but not XmlRpcMetaDataHandler, should possibly excluded: Otherwise, the listable handler mapping could not provide meaningful replies to system.methodSignature, and system.methodHelp.

Throws:

XmlRpcException - An internal error occurred.

getMethodSignature

java.lang.String[][] getMethodSignature(java.lang.String pHandlerName)
                                        throws XmlRpcException

This method implements the introspection method system.methodSignature, which is specified as follows:

This method takes one parameter, the name of a method implemented by the XML-RPC server. It returns an array of possible signatures for this method. A signature is an array of types. The first of these types is the return type of the method, the rest are parameters.

Multiple signatures (ie. overloading) are permitted: this is the reason that an array of signatures are returned by this method.

Signatures themselves are restricted to the top level parameters expected by a method. For instance if a method expects one array of structs as a parameter, and it returns a string, its signature is simply "string, array". If it expects three integers, its signature is "string, int, int, int".

If no signature is defined for the method, a none-array value is returned. Therefore this is the way to test for a non-signature, if $resp below is the response object from a method call to system.methodSignature:

      $v=$resp->value();
      if ($v->kindOf()!="array") {
        // then the method did not have a signature defined
      }
    

See the introspect.php demo included in this distribution for an example of using this method.

Throws:

XmlRpcException

See Also:

XmlRpcMetaDataHandler.getSignatures()

getMethodHelp

java.lang.String getMethodHelp(java.lang.String pHandlerName)
                               throws XmlRpcException

This method implements the introspection method system.methodSignature, which is specified as follows:

This method takes one parameter, the name of a method implemented by the XML-RPC server. It returns a documentation string describing the use of that method. If no such string is available, an empty string is returned.

The documentation string may contain HTML markup.

Throws:

XmlRpcException