ERXExistsQualifier.ExistsQualifierSQLGenerationSupport Class Reference

List of all members.

Public Member Functions
	ExistsQualifierSQLGenerationSupport ()
EOQualifier	qualifierMigratedFromEntityRelationshipPath (EOQualifier qualifier, EOEntity entity, String relationshipPath)
EOQualifier	schemaBasedQualifierWithRootEntity (EOQualifier qualifier, EOEntity entity)
String	sqlStringForSQLExpression (EOQualifier qualifier, EOSQLExpression expression)
Private Member Functions
String	sqlStringForAttributeNamedInExpression (String name, EOSQLExpression expression)

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Detailed Description

Implements the SQL generation for the exists qualifier.

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Constructor & Destructor Documentation

ExistsQualifierSQLGenerationSupport

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Public constructor

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Member Function Documentation

EOQualifier qualifierMigratedFromEntityRelationshipPath	(	EOQualifier	qualifier,
		EOEntity	entity,
		String	relationshipPath
	)

Implementation of the EOQualifierSQLGeneration interface. Just clones the qualifier.

Parameters:

	qualifier	to migrate
	entity	to which the qualifier should be migrated
	relationshipPath	upon which to base the migration

Returns:

clone of the current qualifier

EOQualifier schemaBasedQualifierWithRootEntity	(	EOQualifier	qualifier,
		EOEntity	entity
	)

Implementation of the EOQualifierSQLGeneration interface. Just clones the qualifier.

Parameters:

entity

an entity

Returns:

clone of the current qualifier

String sqlStringForAttributeNamedInExpression	(	String	name,
		EOSQLExpression	expression
	)			[private]

Gets the sql string for the named attribute using the provided expression. The difference between this and the standard EOSQLExpression#sqlStringForAttributeNamed is this one can handle an "attribute" name that ends in a EORelationship rather than an actual EOAttribute. This is necessary to support the ERXExistsQualifier#baseKeyPath syntax (being the relationship path to the entity to which the subqualifier will be applied) chosen for this qualifier.

Parameters:

	name	of the attribute to get, e.g., department.division
	expression	to use when generating the SQL

Returns:

the SQL string for the attribute

String sqlStringForSQLExpression	(	EOQualifier	qualifier,
		EOSQLExpression	expression
	)

Generates the EXISTS SQL string for the given SQL expression. The bulk of the logic for generating the sub-query is in this method.

Parameters:

	qualifier	for which to generate the SQL
	expression	to use during SQL generation

Returns:

SQL string for the current sub-query

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The documentation for this class was generated from the following file:

• /opt/source/Wonder/Frameworks/Core/ERExtensions/Sources/er/extensions/eof/qualifiers/ERXExistsQualifier.java