org.gvsig.tools.evaluator.sqljep

Class SQLJEPEvaluator

java.lang.Object

RowJEP

org.gvsig.tools.evaluator.sqljep.SQLJEPEvaluator

All Implemented Interfaces:

Evaluator, EvaluatorWithDescriptions, Persistent

public class SQLJEPEvaluator
extends RowJEP
implements EvaluatorWithDescriptions, Persistent

Nested Class Summary

Nested classes/interfaces inherited from interface org.gvsig.tools.evaluator.EvaluatorWithDescriptions

EvaluatorWithDescriptions.Description

Field Summary

Fields

Modifier and Type	Field and Description
static String	TODATE_FUNCTION_NAME

Constructor Summary

Constructors

Constructor and Description
SQLJEPEvaluator(String expresion)

Method Summary

Modifier and Type	Method and Description
Object	evaluate(EvaluatorData data) Evaluate with the data passed as parameter.
EvaluatorWithDescriptions.Description[]	getAvailableFunctions()
EvaluatorWithDescriptions.Description[]	getAvailableOperators()
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.
Map.Entry	getVariable(String name)
void	loadFromState(PersistentState ps) Set the state of the object from the state passed as parameter.
void	saveToState(PersistentState ps) Saves the internal state of the object on the provided PersistentState object.

Methods inherited from class java.lang.Object

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

Field Detail

TODATE_FUNCTION_NAME

public static final String TODATE_FUNCTION_NAME

See Also:

Constant Field Values

Constructor Detail

SQLJEPEvaluator

public SQLJEPEvaluator(String expresion)

Method Detail

getName

public String getName()

Description copied from interface: Evaluator

Get the symbolic name of the evaluator.

Specified by:

getName in interface Evaluator

Returns:

evaluator's name

getSQL

public String getSQL()

Description copied from interface: Evaluator

Get a SQL representation of the evaluator.

Specified by:

getSQL in interface Evaluator

Returns:

the SQL string or null if not supported.

getDescription

public String getDescription()

Description copied from interface: Evaluator

Get a description of the action performed with the evaluator.

Specified by:

getDescription in interface Evaluator

Returns:

evaluator's description

evaluate

public Object evaluate(EvaluatorData data)
                throws EvaluatorException

Description copied from interface: Evaluator

Evaluate with the data passed as parameter.

Specified by:

evaluate in interface Evaluator

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.

getVariable

public Map.Entry getVariable(String name)
                      throws ParseException

Throws:

ParseException

saveToState

public void saveToState(PersistentState ps)
                 throws PersistenceException

Description copied from interface: Persistent

Saves the internal state of the object on the provided PersistentState object.

Specified by:

saveToState in interface Persistent

Throws:

PersistenceException

loadFromState

public void loadFromState(PersistentState ps)
                   throws PersistenceException

Description copied from interface: Persistent

Set the state of the object from the state passed as parameter.

Specified by:

loadFromState in interface Persistent

Throws:

PersistenceException

getFieldsInfo

public EvaluatorFieldsInfo getFieldsInfo()

Description copied from interface: Evaluator

Get information about fiels used in the evaluator.

Specified by:

getFieldsInfo in interface Evaluator

Returns:

getAvailableOperators

public EvaluatorWithDescriptions.Description[] getAvailableOperators()

Specified by:

getAvailableOperators in interface EvaluatorWithDescriptions

getAvailableFunctions

public EvaluatorWithDescriptions.Description[] getAvailableFunctions()

Specified by:

getAvailableFunctions in interface EvaluatorWithDescriptions