org.datanucleus.query

Class JPQLQueryHelper

java.lang.Object

org.datanucleus.query.JPQLQueryHelper

public class JPQLQueryHelper
extends Object

JPQL query helper class providing key information about the language etc.

Constructor Summary

Constructors

Constructor and Description
JPQLQueryHelper()

Method Summary

Modifier and Type	Method and Description
static String	getJPQLForExpression(Expression expr) Convenience method to return the JPQL single-string query text for the provided expression.
static boolean	isKeyword(String name) Convenience method returning if the supplied name is a keyword for this query language.
static boolean	isKeyword(String name, boolean allowRange) Convenience method returning if the supplied name is a keyword for this query language (including RANGE).
static boolean	isReservedIdentifier(String name) Convenience method returning if the supplied name is a reserved identifier for this query language.

Methods inherited from class java.lang.Object

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

Constructor Detail

JPQLQueryHelper

public JPQLQueryHelper()

Method Detail

isKeyword

public static boolean isKeyword(String name)

Convenience method returning if the supplied name is a keyword for this query language.

Parameters:

name - Name to check

Returns:

Whether it is a keyword

isKeyword

public static boolean isKeyword(String name,
                                boolean allowRange)

Convenience method returning if the supplied name is a keyword for this query language (including RANGE).

Parameters:

name - Name to check

allowRange - whether to allow the RANGE keyword extension

Returns:

Whether it is a keyword

isReservedIdentifier

public static boolean isReservedIdentifier(String name)

Convenience method returning if the supplied name is a reserved identifier for this query language.

Parameters:

name - Name to check

Returns:

Whether it is a reserved identifier

getJPQLForExpression

public static String getJPQLForExpression(Expression expr)

Convenience method to return the JPQL single-string query text for the provided expression.

Parameters:

expr - The expression

Returns:

The JPQL single-string text that equates to this expression