Package net.sf.basedb.core

Class DynamicRestriction

java.lang.Object

net.sf.basedb.core.DynamicRestriction

All Implemented Interfaces:

QueryElement, Restriction

class DynamicRestriction
extends Object
implements Restriction

Creates a restriction that compares a dynamic column with a constant value: tableAlias.column = value or queryRootAlias.column = value

Version:

2.0

Author:

Nicklas

Last modified

$Date: 2012-09-14 09:28:35 +0200 (fr, 14 sep 2012) $

Field Summary

Fields

Modifier and Type	Field	Description
private final VirtualColumn	column
private final VirtualTable	table
private final int	value

Constructor Summary

Constructors

Constructor	Description
DynamicRestriction(VirtualColumn column, int value)	Create a new restriction for column in the root entity of the query: queryRootAlias.column = value.
DynamicRestriction(VirtualTable table, VirtualColumn column, int value)	Create a new restriction for column in a joined table: tableAlias.column = value.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object other)	This restriction is equal to another DynamicRestriction if their table, column and values 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 Details

table

private final VirtualTable table

column

private final VirtualColumn column

value

private final int value

Constructor Details

DynamicRestriction

DynamicRestriction(VirtualColumn column,
 int value)

Create a new restriction for column in the root entity of the query: queryRootAlias.column = value.

Parameters:

column - The column to use in the restriction

value - The value to look for

DynamicRestriction

DynamicRestriction(VirtualTable table,
 VirtualColumn column,
 int value)

Create a new restriction for column in a joined table: tableAlias.column = value. It is assumed that the table specified has been joined in the query.

Parameters:

table - The table the column is located in

column - The column to use in the restriction

value - The value to look for

See Also:

• DynamicJoin

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

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object other)

This restriction is equal to another DynamicRestriction if their table, column and values are equal.

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object