com.orientechnologies.orient.core.sql.method

Class OSQLMethodLeft

java.lang.Object

com.orientechnologies.orient.core.sql.method.misc.OAbstractSQLMethod

com.orientechnologies.orient.core.sql.method.OSQLMethodLeft

All Implemented Interfaces:

OSQLMethod, Comparable<OSQLMethod>

public class OSQLMethodLeft
extends OAbstractSQLMethod

Returns the first characters from the beginning of the string.

Author:

Johann Sorel (Geomatys), Luca Garulli (l.garulli--(at)--orientdb.com)

Field Summary

Fields

Modifier and Type	Field and Description
static String	NAME

Constructor Summary

Constructors

Constructor and Description
OSQLMethodLeft()

Method Summary

Modifier and Type	Method and Description
Object	execute(Object iThis, OIdentifiable iCurrentRecord, OCommandContext iContext, Object ioResult, Object[] iParams) Process a record.
String	getSyntax() Returns a convinient SQL String representation of the method.

Methods inherited from class com.orientechnologies.orient.core.sql.method.misc.OAbstractSQLMethod

compareTo, evaluateParameters, getMaxParams, getMinParams, getName, getParameterValue, toString

Methods inherited from class java.lang.Object

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

Field Detail

NAME

public static final String NAME

See Also:

Constant Field Values

Constructor Detail

OSQLMethodLeft

public OSQLMethodLeft()

Method Detail

getSyntax

public String getSyntax()

Description copied from interface: OSQLMethod

Returns a convinient SQL String representation of the method.

Example :

  field.myMethod( param1, param2, [optionalParam3])
 

This text will be used in exception messages.

Specified by:

getSyntax in interface OSQLMethod

Overrides:

getSyntax in class OAbstractSQLMethod

Returns:

String , never null.

execute

public Object execute(Object iThis,
                      OIdentifiable iCurrentRecord,
                      OCommandContext iContext,
                      Object ioResult,
                      Object[] iParams)

Description copied from interface: OSQLMethod

Process a record.

iCurrentRecord - : current record

iContext - execution context

ioResult - : field value

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

Returns:

evaluation result