net.sf.basedb.core.query
Class SelectedExpression

java.lang.Object
  net.sf.basedb.core.query.SelectedExpression

All Implemented Interfaces:

Expression, QueryElement

public class SelectedExpression
extends Object
implements Expression

An expression representing an already selected expression. If the select object has an alias, the alias is used otherwise the expression is regenerated.

Version:

2.0

Author:

Nicklas

See Also:

Expressions.selected(Select)

Last modified

$Date: 2010-04-21 11:48:29 +0200 (Wed, 21 Apr 2010) $

Field Summary

private Select

select

Constructor Summary

SelectedExpression(Select select)

Method Summary

boolean	equals(Object other) This expression is equal to another SelectedExpression if their child expressions are equal.
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()

Methods inherited from class java.lang.Object

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

Field Detail

select

private final Select select

Constructor Detail

SelectedExpression

SelectedExpression(Select select)

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 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:

The selected expression

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object other)

This expression is equal to another SelectedExpression if their child expressions are equal.

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object