org.gvsig.tools.evaluator
Interface Evaluator

All Known Implementing Classes:

AbstractEvaluator, AndEvaluator

public interface Evaluator

This interface provides the necessary methods for processing CQL expressions.

Method Summary

Object	evaluate(EvaluatorData data) Evaluate with the data passed as parameter.
String	getDescription() Get a description of the action performed with the evaluator.
EvaluatorFieldsInfo	getFieldsInfo() Get information about fiels used in the evaluator.
String	getName() Get the symbolic name of the evaluator.
String	getSQL() Get a SQL representation of the evaluator.

Method Detail

evaluate

Object evaluate(EvaluatorData data)
                throws EvaluatorException

Evaluate with the data passed as parameter.

Parameters:

data -

Returns:

the result of the evaluation.

Throws:

EvaluatorException

getName

String getName()

Get the symbolic name of the evaluator.

Returns:

evaluator's name

getDescription

String getDescription()

Get a description of the action performed with the evaluator.

Returns:

evaluator's description

getSQL

String getSQL()

Get a SQL representation of the evaluator.

Returns:

the SQL string or null if not supported.

getFieldsInfo

EvaluatorFieldsInfo getFieldsInfo()

Get information about fiels used in the evaluator.

Returns: