Package net.sf.basedb.core.query
Class SubqueryExpression
- java.lang.Object
-
- net.sf.basedb.core.query.SubqueryExpression
-
- All Implemented Interfaces:
Expression
,QueryElement
public class SubqueryExpression extends Object implements Expression
Expression that returns the result of a query as it's value. This expression is used with subqueries.- Version:
- 2.9
- Author:
- Nicklas
- See Also:
Expressions.any(Query)
,Expressions.all(Query)
- Last modified
- $Date: 2010-04-21 11:48:29 +0200 (on, 21 apr 2010) $
-
-
Constructor Summary
Constructors Constructor Description SubqueryExpression(String operator, Query subquery)
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
equals(Object other)
This expression is equal to another SubqueryExpression if they use the same operator and reference the same subquery instance.Collection<? extends QueryElement>
getChildren()
Get the children of this query element or null if it has no children.int
hashCode()
String
toQl(Query query, DbControl dc)
Create a query language string of the query element.String
toString()
-
-
-
Method Detail
-
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 theQuery.getQueryType()
method to find out which query language is wanted in case the element requires different syntax for different languages.- Specified by:
toQl
in interfaceQueryElement
- Parameters:
query
- The query that is about to be executeddc
- TheDbControl
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 theAddExpression
has two children, the expression beeing added.- Specified by:
getChildren
in interfaceQueryElement
- Returns:
- Always null
-
equals
public boolean equals(Object other)
This expression is equal to another SubqueryExpression if they use the same operator and reference the same subquery instance.
-
-