Class makeListFunction
- java.lang.Object
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- org.apache.activemq.filter.function.makeListFunction
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- All Implemented Interfaces:
FilterFunction
public class makeListFunction extends Object implements FilterFunction
Filter function that creates a list with each argument being one element in the list. For example:MAKELIST( '1', '2', '3' )
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Constructor Summary
Constructors Constructor Description makeListFunction()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Object
evaluate(FunctionCallExpression expr, MessageEvaluationContext message)
Evalutate the given expression, which consists of a call to this function, in the context given.boolean
isValid(FunctionCallExpression expr)
Check whether the given expression is a valid call of this function.boolean
returnsBoolean(FunctionCallExpression expr)
Indicate that this function never evaluates to a Boolean result.
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Method Detail
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isValid
public boolean isValid(FunctionCallExpression expr)
Check whether the given expression is a valid call of this function. Any number of arguments is accepted.- Specified by:
isValid
in interfaceFilterFunction
- Parameters:
expr
- - the expression consisting of a call to this function.- Returns:
- true - if the expression is valid; false - otherwise.
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returnsBoolean
public boolean returnsBoolean(FunctionCallExpression expr)
Indicate that this function never evaluates to a Boolean result.- Specified by:
returnsBoolean
in interfaceFilterFunction
- Parameters:
expr
- - the expression consisting of a call to this function.- Returns:
- false - this Filter Function never evaluates to a Boolean.
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evaluate
public Object evaluate(FunctionCallExpression expr, MessageEvaluationContext message) throws JMSException
Evalutate the given expression, which consists of a call to this function, in the context given. Creates a list containing the evaluated results of its argument expressions.- Specified by:
evaluate
in interfaceFilterFunction
- Parameters:
expr
- - the expression consisting of a call to this function.message
- - the context in which the call is being evaluated.- Returns:
- java.util.List - the result of the evaluation.
- Throws:
JMSException
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