com.bea.wlpi.common.plugin
Interface PluginFunction

public interface PluginFunction

extends java.io.Serializable

The interface that a plugin must implement to define a new evaluator function.

Since:

WebLogic Process Integrator 2.0

Author:

Copyright © 2000, 2001 BEA Systems, Inc. All Rights Reserved.

See Also:

FunctionInfo

Method Summary

java.lang.Object

evaluate(EvaluationContext context, java.lang.Object[] args) Evaluate the function.

Method Detail

evaluate

public java.lang.Object evaluate(EvaluationContext context,
                                 java.lang.Object[] args)
                          throws PluginException

Evaluate the function. The expression evaluator calls this method when it needs to evaluate this function call. The plugin function can calculate its return value from the contextual information supplied via the context parameter, which enables access to event data and workflow instance state (where appropriate).

Parameters:

context - The evaluation context.

args - An array of actual parameter values. These are all pre-calculated by evaluating the expressions that represent the function's arguments in the source expression.

Returns:

The result of evaluating this function against the data contained in the context parameter.

Throws:

PluginException -