org.gvsig.tools.evaluator

Class AndEvaluator

java.lang.Object

org.gvsig.tools.evaluator.AbstractEvaluator

org.gvsig.tools.evaluator.AndEvaluator

All Implemented Interfaces:

Evaluator

public class AndEvaluator
extends AbstractEvaluator

This evaluator is a set of evaluators that are applied used the and operator. It means that the evaluate method only returns true if all the evaluators return true.

A condition to use this type of evaluators is that the evaluate method of all the single evaluators has to return a boolean value.

Version:

$Id$

Author:

gvSIG Team

Constructor Summary

Constructors

Constructor and Description
AndEvaluator(Evaluator evaluator)

Method Summary

Methods

Modifier and Type	Method and Description
void	addEvaluator(Evaluator evaluator)
Object	evaluate(EvaluatorData data) Evaluate with the data passed as parameter.
String	getName() Get the symbolic name of the evaluator.
String	getSQL() Get a SQL representation of the evaluator.

Methods inherited from class org.gvsig.tools.evaluator.AbstractEvaluator

getDescription, getFieldsInfo

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AndEvaluator

public AndEvaluator(Evaluator evaluator)

Method Detail

evaluate

public Object evaluate(EvaluatorData data)
                throws EvaluatorException

Description copied from interface: Evaluator

Evaluate with the data passed as parameter.

Returns:

the result of the evaluation.

Throws:

EvaluatorException - if an issue is found while evaluating. The subclass EvaluatorParseException is used to indicate a problem while parsing (malformed expression) rather than a problem while evaluating.

getName

public String getName()

Description copied from interface: Evaluator

Get the symbolic name of the evaluator.

Returns:

evaluator's name

addEvaluator

public void addEvaluator(Evaluator evaluator)

getSQL

public String getSQL()

Description copied from interface: Evaluator

Get a SQL representation of the evaluator.

Specified by:

getSQL in interface Evaluator

Overrides:

getSQL in class AbstractEvaluator

Returns:

the SQL string or null if not supported.