org.eclipse.incquery.runtime.matchers.psystem

Interface IValueProvider

All Known Implementing Classes:

MatchingFrameValueProvider, TupleValueProvider

public interface IValueProvider

Helper interface to get values from a tuple of variables. All pattern matching engines are expected to implement this to handle their internal structures.

Author:

Zoltan Ujhelyi

Method Summary

Modifier and Type	Method and Description
java.lang.Object	getValue(java.lang.String variableName) Returns the value of the selected variable

Method Detail

getValue

java.lang.Object getValue(java.lang.String variableName)
                   throws java.lang.IllegalArgumentException

Returns the value of the selected variable

Parameters:

variableName -

Returns:

the value of the variable; never null

Throws:

java.lang.IllegalArgumentException - if the variable is not defined