com.blazebit.persistence.spi

Class JpqlFunctionGroup

java.lang.Object

com.blazebit.persistence.spi.JpqlFunctionGroup

public final class JpqlFunctionGroup
extends Object

A group of JpqlFunctions for various DBMSes under a single function name.

Since:

1.0.0

Author:

Christian Beikov

Constructor Summary

Constructors

Constructor and Description
JpqlFunctionGroup(String name) Constructs a non-aggregate function group with the given name.
JpqlFunctionGroup(String name, boolean aggregate) Constructs a function group with the given name.
JpqlFunctionGroup(String name, boolean aggregate, Map<String,JpqlFunction> rdbmsFunctions) Constructs a function group with the given name and given function mappings.
JpqlFunctionGroup(String name, JpqlFunction defaultFunction) Constructs a non-aggregate function group with the given name and given default function.

Method Summary

Modifier and Type	Method and Description
void	add(String rdbms, JpqlFunction function) Adds the given JpqlFunction for the given RDBMS to the group.
boolean	contains(String rdbms) Whether a JpqlFunction for the given RDBMS name exists.
JpqlFunction	get(String rdbms) Returns the JpqlFunction for the given RDBMS name.
String	getName() The name of the function.
boolean	isAggregate() Whether the function is an aggregate.

Methods inherited from class java.lang.Object

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

Constructor Detail

JpqlFunctionGroup

public JpqlFunctionGroup(String name)

Constructs a non-aggregate function group with the given name.

Parameters:

name - The function name

JpqlFunctionGroup

public JpqlFunctionGroup(String name,
                         JpqlFunction defaultFunction)

Constructs a non-aggregate function group with the given name and given default function.

Parameters:

name - The function name

defaultFunction - The default function to use when no specific function for a DBMS is available

JpqlFunctionGroup

public JpqlFunctionGroup(String name,
                         boolean aggregate)

Constructs a function group with the given name.

Parameters:

name - The function name

aggregate - True if the function is an aggregate function, false otherwise

JpqlFunctionGroup

public JpqlFunctionGroup(String name,
                         boolean aggregate,
                         Map<String,JpqlFunction> rdbmsFunctions)

Constructs a function group with the given name and given function mappings.

Parameters:

name - The function name

aggregate - True if the function is an aggregate function, false otherwise

rdbmsFunctions - The RDBMS functions in a map

Method Detail

getName

public String getName()

The name of the function.

Returns:

The function name

isAggregate

public boolean isAggregate()

Whether the function is an aggregate.

Returns:

True if this is an aggregate function, false otherwise

get

public JpqlFunction get(String rdbms)

Returns the JpqlFunction for the given RDBMS name.

Parameters:

rdbms - The RDBMS name

Returns:

The JpqlFunction or null

contains

public boolean contains(String rdbms)

Whether a JpqlFunction for the given RDBMS name exists.

Parameters:

rdbms - The RDBMS name

Returns:

True if a function for the RDBMS was registered, false otherwise

add

public void add(String rdbms,
                JpqlFunction function)

Adds the given JpqlFunction for the given RDBMS to the group.

Parameters:

rdbms - The RDBMS name for which to register the function or null to register the default function

function - The JpqlFunction to register