net.sf.mmm.jpa.base.query.statement.jpql

Class JpqlDialect

java.lang.Object

net.sf.mmm.jpa.base.query.statement.jpql.JpqlDialect

All Implemented Interfaces:

SqlDialect

Direct Known Subclasses:

UnquotedJpqlDialect

public class JpqlDialect
extends Object
implements SqlDialect

The implementation of SqlDialect for Java Persistence Query Language (JPQL).

Since:

8.0.0

Author:

hohwille

Field Summary

Fields

Modifier and Type	Field and Description
static JpqlDialect	INSTANCE The singleton instance of this class.

Constructor Summary

Constructors

Constructor and Description
JpqlDialect() The constructor.

Method Summary

Modifier and Type	Method and Description
String	limit()
String	offset()
String	parameter(int index)
String	property(ReadableProperty<?> property)

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.sf.mmm.util.query.base.statement.SqlDialect

alias, and, as, as, assignment, conjuction, countAll, delete, deleteFrom, distinct, empty, endConjunction, endExpression, escape, escape, fetch, forUpdate, from, groupBy, having, in, innerJoin, insert, insertInto, into, is, isEmpty, isNotEmpty, isNotNull, isNull, join, leftJoin, leftOuterJoin, let, like, literalFalse, literalNull, literalTrue, not, operator, or, order, orderBy, parameter, quoteReference, ref, select, selectCountAll, selectDistinct, separator, set, startConjunction, startExpression, update, upsert, variable, where

Field Detail

INSTANCE

public static final JpqlDialect INSTANCE

The singleton instance of this class.

Constructor Detail

JpqlDialect

public JpqlDialect()

The constructor.

Method Detail

parameter

public String parameter(int index)

Specified by:

parameter in interface SqlDialect

Parameters:

index - the zero-based index of the current parameter.

Returns:

the SQL for the indexed parameter as bind variable.

offset

public String offset()

Specified by:

offset in interface SqlDialect

Returns:

the OFFSET (or SKIP) keyword to supply an offset. Will be the empty String if NOT support via SQL (maybe only via query metadata).

limit

public String limit()

Specified by:

limit in interface SqlDialect

Returns:

the LIMIT keyword to supply the maximum number of results. Will be the empty String if NOT supported via this SqlDialect (maybe only via query metadata).

property

public String property(ReadableProperty<?> property)

Specified by:

property in interface SqlDialect

Parameters:

property - the property to format.

Returns:

the formatter property name.