org.eclipse.persistence.jpa.jpql.parser
Class CoalesceExpressionFactory

java.lang.Object
  org.eclipse.persistence.jpa.jpql.parser.ExpressionFactory
      org.eclipse.persistence.jpa.jpql.parser.CoalesceExpressionFactory

All Implemented Interfaces:

java.lang.Comparable<ExpressionFactory>

public final class CoalesceExpressionFactory
extends ExpressionFactory

This CoalesceExpressionFactory creates a new CoalesceExpression when the portion of the query to parse starts with COALESCE.

Version:

2.4

See Also:

CoalesceExpression

Author:

Pascal Filion

Since:

2.3

Field Summary

static java.lang.String

ID The unique identifier of this CoalesceExpressionFactory.

Constructor Summary

CoalesceExpressionFactory()
Creates a new CoalesceExpressionFactory.

Method Summary

protected AbstractExpression

buildExpression(AbstractExpression parent, WordParser wordParser, java.lang.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, getFallBackExpressionFactoryId, getId, hashCode, identifiers, setFallBackExpressionFactory, toString

Methods inherited from class java.lang.Object

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

Field Detail

ID

public static final java.lang.String ID

The unique identifier of this CoalesceExpressionFactory.

See Also:

Constant Field Values

Constructor Detail

CoalesceExpressionFactory

public CoalesceExpressionFactory()

Creates a new CoalesceExpressionFactory.

Method Detail

buildExpression

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

Creates a new Expression.

Specified by:

buildExpression in class ExpressionFactory

Parameters:

parent - The parent expression

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

word - The current word to parse

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 Expression representing a portion or the totality of the given text