ERXQualifierInSubquery Class Reference

Inherits com::webobjects::eocontrol::EOQualifier, com::webobjects::eoaccess::EOQualifierSQLGeneration, and com::webobjects::eocontrol::EOQualifierEvaluation.

Collaboration diagram for ERXQualifierInSubquery:

[legend]

List of all members.

Public Member Functions
void	addQualifierKeysToSet (NSMutableSet aSet)
Object	clone ()
	ERXQualifierInSubquery (EOQualifier qualifier, String entityName, String attributeName, String destinationAttName)
	ERXQualifierInSubquery (EOQualifier qualifier, String entityName, String relationshipName)
	ERXQualifierInSubquery (EOQualifier qualifier)
boolean	evaluateWithObject (Object object)
EOQualifier	qualifierMigratedFromEntityRelationshipPath (EOEntity anEntity, String aPath)
EOQualifier	qualifierWithBindings (NSDictionary someBindings, boolean requiresAll)
EOQualifier	schemaBasedQualifierWithRootEntity (EOEntity anEntity)
String	sqlStringForSQLExpression (EOSQLExpression e)
String	toString ()
void	validateKeysWithRootClassDescription (EOClassDescription aClassDescription)
Static Public Attributes
static final Logger	log = Logger.getLogger(ERXQualifierInSubquery.class)
Protected Attributes
String	attributeName
String	destinationAttName
String	entityName
EOQualifier	qualifier
String	relationshipName

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Detailed Description

Generates a subquery for the qualifier given in argument:

 EOQualifier q = EOQualifier.qualifierWithQualifierFormat("firstName = 'Max'", null);
 ERXQualifierInSubquery qq = new ERXQualifierInSubquery(q, "User", "group");
 EOFetchSpecification fs = new EOFetchSpecification("Group", qq, null);
 

Would generate: "SELECT t0.GROUP_ID, t0.NAME FROM USER t0 WHERE t0.GROUP_ID IN ( SELECT t0.GROUP_ID FROM GROUP t0 WHERE t0.NAME = ? ) "

This class can be used to work around the EOF bug where OR queries involving many-to-manies are incorrectly generated

It will also generate

... t0.FOREIGN_KEY_ID in (select t1.ID from X where [your qualifier here])

with the 3 arg constructor

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Constructor & Destructor Documentation

ERXQualifierInSubquery

(

EOQualifier

qualifier

)

Public single argument constructor. Use this constructor for sub-qualification on the same table.

Parameters:

qualifier

sub qualifier

ERXQualifierInSubquery	(	EOQualifier	qualifier,
		String	entityName,
		String	relationshipName
	)

Parameters:

	qualifier	sub qualifier
	entityName	of the sub qualification
	relationshipName	relationship name

ERXQualifierInSubquery	(	EOQualifier	qualifier,
		String	entityName,
		String	attributeName,
		String	destinationAttName
	)

Parameters:

	qualifier	sub qualifier
	entityName	of the sub qualification
	attributeName	foreign key attribute name
	destinationAttName	destination key name

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Member Function Documentation

void addQualifierKeysToSet

(

NSMutableSet

aSet

)

Only used with qualifier keys which are not supported in this qualifier at this time. Does nothing.

Parameters:

aSet

of qualifier keys

Object clone

(

)

Implementation of the Clonable interface. Clones the current qualifier.

Returns:

cloned qualifier.

boolean evaluateWithObject

(

Object

object

)

EOQualifier qualifierMigratedFromEntityRelationshipPath	(	EOEntity	anEntity,
		String	aPath
	)

Implementation of the EOQualifierSQLGeneration interface. Just clones the qualifier.

Parameters:

	anEntity	an entity
	aPath	relationship path

Returns:

clone of the current qualifier.

EOQualifier qualifierWithBindings	(	NSDictionary	someBindings,
		boolean	requiresAll
	)

Creates another qualifier after replacing the values of the bindings. Since this qualifier does not support qualifier binding keys a clone of the qualifier is returned.

Parameters:

	someBindings	some bindings
	requiresAll	tells if the qualifier requires all bindings

Returns:

clone of the current qualifier.

EOQualifier schemaBasedQualifierWithRootEntity

(

EOEntity

anEntity

)

Implementation of the EOQualifierSQLGeneration interface. Just clones the qualifier.

Parameters:

anEntity

an entity.

Returns:

clone of the current qualifier.

String sqlStringForSQLExpression

(

EOSQLExpression

e

)

Generates the sql string for the given sql expression. Bulk of the logic for generating the sub-query is in this method.

Parameters:

e

a given sql expression

Returns:

sql string for the current sub-query.

String toString

(

)

Description of the qualifier

Returns:

human readable description of the qualifier.

void validateKeysWithRootClassDescription

(

EOClassDescription

aClassDescription

)

This qualifier does not perform validation. This is a no-op method.

Parameters:

aClassDescription

to validation the qualifier keys against.

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Member Data Documentation

String attributeName [protected]

holds the attribute name

String destinationAttName [protected]

holds the attribute name

String entityName [protected]

holds the entity name

final Logger log = Logger.getLogger(ERXQualifierInSubquery.class) [static]

logging support

EOQualifier qualifier [protected]

holds the subqualifier

String relationshipName [protected]

holds the relationship name

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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/ERXQualifierInSubquery.java