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#ifndef Pegasus_CIMMethodProvider_h
#define Pegasus_CIMMethodProvider_h

#include <Pegasus/Common/Config.h>
#include <Pegasus/Provider/CIMProvider.h>

#include <Pegasus/Common/Array.h>
#include <Pegasus/Common/CIMName.h>
#include <Pegasus/Common/CIMObjectPath.h>
#include <Pegasus/Common/CIMValue.h>
#include <Pegasus/Common/CIMParamValue.h>
#include <Pegasus/Provider/Linkage.h>

PEGASUS_NAMESPACE_BEGIN

/**
    Functions that support the invocation of methods defined
    for a CIM class.

    <p>The <i>Method Provider</i> supports the client InvokeMethod
    operation that invokes any method(s)
    defined on a CIM class of object. In addition to the
    methods from the {@link CIMProvider CIMProvider}
    interface that the functions inherit, the Method Provider interface
    defines one function:</p>

    <ul>
    <li>{@link invokeMethod invokeMethod}</li>
    </ul>

    <p>The arguments to <tt>invokeMethod</tt> specify the instance
    that the method invokes, the method name, and its
    parameters.</p>

    <p>Providers that derive from this class <i>must</i> implement
    all of these functions. A minimal implementation of <tt>invokeMethod</tt>
    may throw a {@link CIMNotSupportedException CIMNotSupportedException}
    exception.</p>

    <p>A method provider is not required to implement all of the
    CIM methods defined for a class; there can be more than one
    method provider for a class. Each provider
    may implement a subset of the defined methods, leaving other
    methods providers to implemente methods. No method
    can be implemented by more than one provider. The
    methods that are implemented by a provider must be specified to
    the CIM Server through provider registration in the
    <tt>SupportedMethods</tt> property of an instance of the
    <tt>PG_ProviderCapabilities</tt> class.</p>
*/
class PEGASUS_PROVIDER_LINKAGE CIMMethodProvider : public virtual CIMProvider
{
public:
    /** Constructs a CIMMethodProvider object with null values (default
        constructor).
    */
    CIMMethodProvider();

    /** CIMMethodProvider destructor.
    */
    virtual ~CIMMethodProvider();

    /**
        Invoke the specified method on the specified instance.

        <p>Instructs the provider to invoke the method specified in the
        <tt>methodName</tt> parameter on the object
        specified in the <tt>objectReference</tt> parameter.

        @param context Specifies the client user's context for this operation,
        including the user ID.

        @param objectReference Specifies the fully qualified object path
        of the class or instance of interest.

        @param methodName Specifies the name of the method of interest.

        @param inParameters Specifies the input parameters of the method.

        @param handler A {@link ResponseHandler ResponseHandler} object used
        to deliver results to the CIM Server.

        @exception CIMNotSupportedException If the method is not supported.
        @exception CIMInvalidParameterException If the parameter is invalid.
        @exception CIMObjectNotFoundException If the object is not found.
        @exception CIMAccessDeniedException If the user requesting the action
        is not authorized to perform the action.
        @exception CIMOperationFailedException If the operation fails.
    */
    virtual void invokeMethod(
        const OperationContext& context,
        const CIMObjectPath& objectReference,
        const CIMName& methodName,
        const Array<CIMParamValue>& inParameters,
        MethodResultResponseHandler& handler) = 0;
};

PEGASUS_NAMESPACE_END

#endif