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org.eclipse.persistence.jpa.internal.jpql.parser
Class EmptyCollectionComparisonExpressionFactory

java.lang.Object
org.eclipse.persistence.jpa.internal.jpql.parser.ExpressionFactory
org.eclipse.persistence.jpa.internal.jpql.parser.EmptyCollectionComparisonExpressionFactory

All Implemented Interfaces:

java.lang.Comparable<ExpressionFactory>

final class EmptyCollectionComparisonExpressionFactory

extends ExpressionFactory

This EmptyCollectionComparisonExpressionFactory creates a new EmptyCollectionComparisonExpression when the portion of the query to parse starts with IS EMPTY or IS NOT EMPTY.

Since:

2.3

Version:

2.3

Author:

Pascal Filion

See Also:

EmptyCollectionComparisonExpression

Field Summary

(package private) static java.lang.String

ID The unique identifier of this EmptyCollectionComparisonExpressionFactory.

Constructor Summary

EmptyCollectionComparisonExpressionFactory()
Creates a new EmptyCollectionComparisonExpressionFactory.

Method Summary

(package private) 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.internal.jpql.parser.ExpressionFactory

compareTo, equals, getId, getVersion, hashCode, identifiers, toString

Methods inherited from class java.lang.Object

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

Field Detail

ID

static final java.lang.String ID

The unique identifier of this EmptyCollectionComparisonExpressionFactory.

See Also:

Constant Field Values

Constructor Detail

EmptyCollectionComparisonExpressionFactory

EmptyCollectionComparisonExpressionFactory()

Creates a new EmptyCollectionComparisonExpressionFactory.

Method Detail

buildExpression

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

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