org.gvsig.expressionevaluator.impl.function.programming

Class $HostExpressionFunction

java.lang.Object

org.gvsig.expressionevaluator.spi.AbstractFunction

org.gvsig.expressionevaluator.impl.function.programming.$HostExpressionFunction

All Implemented Interfaces:

Function

public class $HostExpressionFunction
extends AbstractFunction

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	MODE_SPECIFIER_ID
static java.lang.String	MODE_SPECIFIER_IN
static java.lang.String	MODE_SPECIFIER_INOUT
static java.lang.String	MODE_SPECIFIER_OUT

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
$HostExpressionFunction()

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)

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, toValue, useArgumentsInsteadObjects

Methods inherited from class java.lang.Object

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

Field Detail

MODE_SPECIFIER_IN

public static final java.lang.String MODE_SPECIFIER_IN

See Also:

Constant Field Values

MODE_SPECIFIER_OUT

public static final java.lang.String MODE_SPECIFIER_OUT

See Also:

Constant Field Values

MODE_SPECIFIER_INOUT

public static final java.lang.String MODE_SPECIFIER_INOUT

See Also:

Constant Field Values

MODE_SPECIFIER_ID

public static final java.lang.String MODE_SPECIFIER_ID

See Also:

Constant Field Values

Constructor Detail

$HostExpressionFunction

public $HostExpressionFunction()

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