Module eclipselink

Package org.eclipse.persistence.jpa.jpql.parser

Class ExtractExpressionFactory

java.lang.Object

org.eclipse.persistence.jpa.jpql.parser.ExpressionFactory

org.eclipse.persistence.jpa.jpql.parser.ExtractExpressionFactory

All Implemented Interfaces:

Comparable<ExpressionFactory>

public final class ExtractExpressionFactory
extends ExpressionFactory

This ExtractExpressionFactory creates a new ExtractExpression when the portion of the query to parse starts with EXTRACT.

Version:

2.4

See Also:

CastExpression

Author:

James Sutherland

Since:

2.4

Field Summary

Fields

Modifier and Type	Field	Description
static String	ID	The unique identifier of this ExtractExpressionFactory.

Constructor Summary

Constructors

Constructor	Description
ExtractExpressionFactory()	Creates a new TrimExpressionFactory.

Method Summary

Modifier and Type	Method	Description
protected AbstractExpression	buildExpression(AbstractExpression parent, WordParser wordParser, String word, JPQLQueryBNF queryBNF, AbstractExpression expression, boolean tolerant)	Creates a new Expression.

Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.ExpressionFactory

compareTo, equals, getExpressionRegistry, getId, hashCode, identifiers, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

ID

public static final String ID

The unique identifier of this ExtractExpressionFactory.

See Also:

Constant Field Values

Constructor Detail

ExtractExpressionFactory

public ExtractExpressionFactory()

Creates a new TrimExpressionFactory.

Method Detail

buildExpression

protected AbstractExpression buildExpression(AbstractExpression parent,
                                             WordParser wordParser,
                                             String word,
                                             JPQLQueryBNF queryBNF,
                                             AbstractExpression expression,
                                             boolean tolerant)

Description copied from class: ExpressionFactory

Creates a new Expression.

Specified by:

buildExpression in class ExpressionFactory

Parameters:

parent - The parent AbstractExpression

wordParser - The text to parse based on the current position of the cursor

word - The current word being parsed

queryBNF - The BNF grammar that was used to identifier this factory to be capable to parse a portion of the query

expression - During the parsing, it is possible the first part of an expression was parsed which needs to be used as a sub-expression of the newly created expression

Returns:

A new AbstractExpression representing the portion or the totality of the text held by WordParser starting at the cursor position