velosurf.validation
Class Reference

java.lang.Object
  velosurf.validation.FieldConstraint
      velosurf.validation.Reference

public class Reference
extends FieldConstraint

A foreign key constraint. Syntax is:

    <column references="table.foreign-key">
 

or:

   <column>
     <references foreign-key="table.foreign-key" [message="error-message"]/>
   </column>
 

Note: his constraint is not meant to replace an internal SQL "references" clause in the database, since it cannot be made sure that complex updates will respect this constraint.

Author:

Claude Brisson

Field Summary

protected java.lang.String	_column
protected Database	_db
protected java.lang.String	_table

Fields inherited from class velosurf.validation.FieldConstraint

_message

Constructor Summary

Reference(Database db, java.lang.String table, java.lang.String column)
Constructor.

Method Summary

java.lang.String	toString()
boolean	validate(java.lang.Object data)

Methods inherited from class velosurf.validation.FieldConstraint

getMessage, setMessage, validate

Methods inherited from class java.lang.Object

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

Field Detail

_db

protected Database _db

_table

protected java.lang.String _table

_column

protected java.lang.String _column

Constructor Detail

Reference

public Reference(Database db,
                 java.lang.String table,
                 java.lang.String column)

Constructor.

Parameters:

table - the table name

column - the column name

Method Detail

validate

public boolean validate(java.lang.Object data)

Overrides:

validate in class FieldConstraint

Parameters:

data - the data to be validated

Returns:

true if data respects the specified reference

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object