net.sf.jguiraffe.examples.tutorial.createfile

Class UniqueFileNameValidator

java.lang.Object

net.sf.jguiraffe.examples.tutorial.createfile.UniqueFileNameValidator

All Implemented Interfaces:

Validator

public class UniqueFileNameValidator
extends Object
implements Validator

A specialized Validator implementations for checking whether the name entered for a new file does not exist in the current directory.

In the validation method this class obtains the data object with the content of the current directory (which is available as a typed property from the context). Then it checks whether the name entered by the user already exists in this directory. If this is the case, validation fails and an error message is produced.

Version:

$Id: UniqueFileNameValidator.java 205 2012-01-29 18:29:57Z oheger $

Author:

Oliver Heger

Field Summary

Fields

Modifier and Type	Field and Description
static String	ERR_FILE_EXISTS Constant for the error message produced by this validator.

Constructor Summary

Constructors

Constructor and Description
UniqueFileNameValidator()

Method Summary

Modifier and Type	Method and Description
ValidationResult	isValid(Object o, TransformerContext ctx) Performs the validation.

Methods inherited from class java.lang.Object

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

Field Detail

ERR_FILE_EXISTS

public static final String ERR_FILE_EXISTS

Constant for the error message produced by this validator.

See Also:

Constant Field Values

Constructor Detail

UniqueFileNameValidator

public UniqueFileNameValidator()

Method Detail

isValid

public ValidationResult isValid(Object o,
                                TransformerContext ctx)

Performs the validation.

Specified by:

isValid in interface Validator

Parameters:

o - the object to be validated (this is the file name; null names are accepted)

ctx - the validation context

Returns:

the validation results