Package net.sf.basedb.core.query

Class AnnotationJoin

java.lang.Object

net.sf.basedb.core.query.AnnotationJoin

All Implemented Interfaces:

Join, QueryElement

public class AnnotationJoin
extends Object
implements Join

Join annotations values to the query. The value is available as the joined alias.

Throws an UnsupportedOperationException if Query.getQueryType() isn't QueryType.HQL.

Since:

3.2

Author:

Nicklas

See Also:

Annotations.innerJoin(AnnotationType, String), Annotations.leftJoin(AnnotationType, String)

Last modified

$Date$

Field Summary

Fields

Modifier and Type	Field	Description
private String	alias
private AnnotationType	annotationType
private String	joinedAlias
private JoinType	joinType

Constructor Summary

Constructors

Constructor	Description
AnnotationJoin(JoinType joinType, String alias, AnnotationType annotationType, String joinedAlias)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object other)	This join is equal to another AnnotationJoin if they join to the same annotation type with the same alias.
Collection<? extends QueryElement>	getChildren()	Get the children of this query element or null if it has no children.
String	getThetaJoin(Query query, DbControl dc)
String	getThetaJoinCondition(Query query, DbControl dc)
int	hashCode()
String	toQl(Query query, DbControl dc)	Create a query language string of the query element.
String	toString()

Methods inherited from class java.lang.Object

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

Field Details

joinType

private final JoinType joinType

alias

private final String alias

annotationType

private final AnnotationType annotationType

joinedAlias

private final String joinedAlias

Constructor Details

AnnotationJoin

AnnotationJoin(JoinType joinType,
String alias,
AnnotationType annotationType,
String joinedAlias)

Method Details

toQl

public String toQl(Query query,
DbControl dc)
            throws BaseException

Description copied from interface: QueryElement

Create a query language string of the query element. Use the Query.getQueryType() method to find out which query language is wanted in case the element requires different syntax for different languages.

Specified by:

toQl in interface QueryElement

Parameters:

query - The query that is about to be executed

dc - The DbControl object used to execute the query

Throws:

BaseException - If there is any other error

getChildren

public Collection<? extends QueryElement> getChildren()

Description copied from interface: QueryElement

Get the children of this query element or null if it has no children. For example the AddExpression has two children, the expression beeing added.

Specified by:

getChildren in interface QueryElement

Returns:

Always null

getThetaJoin

public String getThetaJoin(Query query,
DbControl dc)
                    throws BaseException

Specified by:

getThetaJoin in interface Join

Throws:

BaseException

getThetaJoinCondition

public String getThetaJoinCondition(Query query,
DbControl dc)
                             throws BaseException

Specified by:

getThetaJoinCondition in interface Join

Throws:

BaseException

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object other)

This join is equal to another AnnotationJoin if they join to the same annotation type with the same alias.

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object