org.apache.empire.db.expr.compare

Class DBCompareNotExpr

java.lang.Object

org.apache.empire.db.DBObject

org.apache.empire.db.DBExpr

org.apache.empire.db.expr.compare.DBCompareExpr

org.apache.empire.db.expr.compare.DBCompareNotExpr

All Implemented Interfaces:

Serializable

public class DBCompareNotExpr
extends DBCompareExpr

This class is used for defining filter constraints based on a column expression in SQL

There is no need to explicitly create instances of this class.
Instead use DBCompareExpr.not()

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
DBCompareExpr	expr

Fields inherited from class org.apache.empire.db.DBExpr

CTX_ALIAS, CTX_ALL, CTX_DEFAULT, CTX_FULLNAME, CTX_NAME, CTX_NOPARENTHESES, CTX_VALUE

Constructor Summary

Constructors

Constructor and Description
DBCompareNotExpr(DBCompareExpr expr) Constructs a DBCompareColExpr object

Method Summary

Methods

Modifier and Type	Method and Description
void	addReferencedColumns(Set<DBColumn> list) Internal function to obtain all DBColumnExpr-objects used by this expression.
void	addSQL(StringBuilder buf, long context) Creates the SQL-Command sets the specified compare value (the varible boolOP) between the two DBCompareExpr objects.
DBDatabase	getDatabase() Returns the current DBDatabase object.
boolean	isMutuallyExclusive(DBCompareExpr other) Returns wheter the constraint should replace another one or not.

Methods inherited from class org.apache.empire.db.expr.compare.DBCompareExpr

and, not, or

Methods inherited from class org.apache.empire.db.DBExpr

getObjectValue, getValueClass

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

expr

public final DBCompareExpr expr

Constructor Detail

DBCompareNotExpr

public DBCompareNotExpr(DBCompareExpr expr)

Constructs a DBCompareColExpr object

Parameters:

expr - the compare expression to negate

Method Detail

getDatabase

public DBDatabase getDatabase()

Returns the current DBDatabase object.

Specified by:

getDatabase in class DBObject

Returns:

the current DBDatabase object

addReferencedColumns

public void addReferencedColumns(Set<DBColumn> list)

Description copied from class: DBExpr

Internal function to obtain all DBColumnExpr-objects used by this expression.

Specified by:

addReferencedColumns in class DBExpr

Parameters:

list - list to which all used column expressions must be added

See Also:

DBExpr.addReferencedColumns(Set)

addSQL

public void addSQL(StringBuilder buf,
          long context)

Creates the SQL-Command sets the specified compare value (the varible boolOP) between the two DBCompareExpr objects.

Specified by:

addSQL in class DBExpr

Parameters:

buf - the SQL statment

context - the current SQL-Command context

isMutuallyExclusive

public boolean isMutuallyExclusive(DBCompareExpr other)

Returns wheter the constraint should replace another one or not.

Specified by:

isMutuallyExclusive in class DBCompareExpr

Returns:

true it the constraints are mutually exclusive or false otherwise