Package com.arcadedb.query.sql.function.misc

Class SQLStaticReflectiveFunction

java.lang.Object

com.arcadedb.query.sql.function.SQLFunctionAbstract

com.arcadedb.query.sql.function.misc.SQLStaticReflectiveFunction

All Implemented Interfaces:

SQLFunction

public class SQLStaticReflectiveFunction
extends SQLFunctionAbstract

This is able to invoke a static method using reflection. If contains more than one Method it tries to pick the one that better fits the input parameters.

Author:

Fabrizio Fortino

Field Summary

Fields inherited from class com.arcadedb.query.sql.function.SQLFunctionAbstract

name

Constructor Summary

Constructors

Constructor	Description
SQLStaticReflectiveFunction(String name, int minParams, int maxParams, Method... methods)

Method Summary

Modifier and Type	Method	Description
Object	execute(Object iThis, Identifiable iCurrentRecord, Object iCurrentResult, Object[] iParams, CommandContext iContext)	Process a record.
String	getSyntax()	Returns a convenient SQL String representation of the function.

Methods inherited from class com.arcadedb.query.sql.function.SQLFunctionAbstract

aggregateResults, config, getName, getResult, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

SQLStaticReflectiveFunction

public SQLStaticReflectiveFunction(String name,
                                   int minParams,
                                   int maxParams,
                                   Method... methods)

Method Detail

execute

public Object execute(Object iThis,
                      Identifiable iCurrentRecord,
                      Object iCurrentResult,
                      Object[] iParams,
                      CommandContext iContext)

Description copied from interface: SQLFunction

Process a record.

iCurrentRecord - : current record

iCurrentResult - TODO

iParams - : function parameters, number is ensured to be within minParams and maxParams.

iContext - : object calling this function

Returns:

function result, can be null. Special cases : can be null if function aggregate results, can be null if function filter results : this mean result is excluded

getSyntax

public String getSyntax()

Description copied from interface: SQLFunction

Returns a convenient SQL String representation of the function.

Example :

  myFunction( param1, param2, [optionalParam3])
 

This text will be used in exception messages.

Returns:

String , never null.