Package org.apache.commons.validator.routines

Class CASNumberValidator

java.lang.Object

org.apache.commons.validator.routines.CASNumberValidator

All Implemented Interfaces:

Serializable

public final class CASNumberValidator
extends Object
implements Serializable

CAS Registry Number (or Chemical Abstracts Service (CAS RN)) validation.

CAS Numbers are unique identification numbers used to identify chemical substance described in the open scientific literature.

Check digit calculation is based on modulus 10 with digits being weighted based on their position (from right to left).

For further information see Wikipedia - CAS Registry Number.

Since:

1.9.0

See Also:

• Serialized Form

Method Summary

Modifier and Type	Method	Description
static CASNumberValidator	getInstance()	Gets the singleton instance of this validator.
boolean	isValid(String code)	Tests whether the code is a valid CAS number.
Object	validate(String code)	Checks the code is valid CAS number.

Methods inherited from class java.lang.Object

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

Method Details

getInstance

public static CASNumberValidator getInstance()

Gets the singleton instance of this validator.

Returns:

A singleton instance of the CAS Number validator.

isValid

public boolean isValid(String code)

Tests whether the code is a valid CAS number.

Parameters:

code - The code to validate.

Returns:

true if a CAS number, otherwise false.

validate

public Object validate(String code)

Checks the code is valid CAS number.

Parameters:

code - The code to validate.

Returns:

A CAS number code with dashes removed if valid, otherwise null.