org.gvsig.expressionevaluator.impl.function.programming

Class GetattrFunction

java.lang.Object

org.gvsig.expressionevaluator.spi.AbstractFunction

org.gvsig.expressionevaluator.impl.function.programming.GetattrFunction

All Implemented Interfaces:

Function

Direct Known Subclasses:

GetattrFunction

public class GetattrFunction
extends AbstractFunction

Field Summary

Fields inherited from class org.gvsig.expressionevaluator.spi.AbstractFunction

LOGGER, TYPE_BIGDECIMAL, TYPE_BOOLEAN, TYPE_DATE, TYPE_DOUBLE, TYPE_FLOAT, TYPE_INT, TYPE_LONG, TYPE_NULL, TYPE_STRING

Fields inherited from interface org.gvsig.expressionevaluator.Function

GROUP_AGGREGATE, GROUP_BOOLEAN, GROUP_CONVERSION, GROUP_DATETIME, GROUP_NUMERIC, GROUP_OGC, GROUP_OTHER, GROUP_PROGRAMMING, GROUP_STRING

Constructor Summary

Constructors

Constructor and Description
GetattrFunction()

Method Summary

Modifier and Type	Method and Description
boolean	allowConstantFolding() Returns true if the function always returns the same value for the same parameters.
java.lang.Object	call(Interpreter interpreter, java.lang.Object[] args)
java.lang.String	toString(Codes args, Formatter<Code> formatter)
ExpressionBuilder.Value	toValue(ExpressionBuilder builder, Codes parameters)

Methods inherited from class org.gvsig.expressionevaluator.spi.AbstractFunction

addAlias, aliases, argc, call, checkDoubleValue, checkFloatValue, description, descriptionArgs, getBigDecimal, getBoolean, getBoolean, getBoolean, getBoolean, getBoolean, getComparable, getComparable, getDate, getDate, getDouble, getDouble, getFile, getFile, getFloat, getFloat, getFullDescription, getInt, getInt, getInt, getJsonArray, getJsonArray, getJsonObject, getJsonObject, getJsonStructure, getJsonStructure, getList, getLocalDateTime, getLocalDateTime, getLong, getLong, getObject, getObject, getStr, getStr, getType, getURL, group, isHidden, isNull, isOperator, isSQLCompatible, name, returnType, template, toBoolean, toString, useArgumentsInsteadObjects

Methods inherited from class java.lang.Object

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

Constructor Detail

GetattrFunction

public GetattrFunction()

Method Detail

allowConstantFolding

public boolean allowConstantFolding()

Description copied from interface: Function

Returns true if the function always returns the same value for the same parameters. If so, it is possible to optimize the generated code through the process of "constant folding". https://en.wikipedia.org/wiki/Constant_folding

Specified by:

allowConstantFolding in interface Function

Overrides:

allowConstantFolding in class AbstractFunction

Returns:

true if this function allow constant folding optimization.

call

public java.lang.Object call(Interpreter interpreter,
                             java.lang.Object[] args)
                      throws java.lang.Exception

Throws:

java.lang.Exception

toString

public java.lang.String toString(Codes args,
                                 Formatter<Code> formatter)

Specified by:

toString in interface Function

Overrides:

toString in class AbstractFunction

toValue

public ExpressionBuilder.Value toValue(ExpressionBuilder builder,
                                       Codes parameters)

Specified by:

toValue in interface Function

Overrides:

toValue in class AbstractFunction