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

private java.lang.String	column column
private Database	db database
private java.lang.String	table table

Constructor Summary

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

Method Summary

java.lang.String	toString() return a string representation for this constraint.
boolean	validate(java.lang.Object data) Validate data against this constraint.

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

private Database db

database

table

private java.lang.String table

table

column

private java.lang.String column

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)

Validate data against this constraint.

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()

return a string representation for this constraint.

Overrides:

toString in class java.lang.Object

Returns:

string