com.redhat.rhn.common.validator

Class Validator

java.lang.Object

com.redhat.rhn.common.validator.Validator

public class Validator
extends java.lang.Object

The Validator class allows an application component or client to provide data, and determine if the data is valid for the requested type.

This code was copied from: http://www.javaworld.com/javaworld/jw-09-2000/jw-0908-validation.html There were no appearent license restrictions on this code, the Author indicated it was free and available to be used by readers of the article.

Method Summary

Modifier and Type	Method and Description
java.util.List	getConstraints() Get the list of Contraints associated with this Validator
static Validator	getInstance(java.net.URL schemaURL) This will return the instance for the specific XML Schema URL.
ValidatorError	validate(java.lang.String constraintName, java.lang.Object objToValidate) This will validate a data value (in String format) against a specific constraint, and return true if that value is valid for the constraint.

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static Validator getInstance(java.net.URL schemaURL)
                             throws java.io.IOException

This will return the instance for the specific XML Schema URL. If a schema exists, it is returned (as parsing will already be done); otherwise, a new instance is created, and then returned.

Parameters:

schemaURL - URL of schema to validate against.

Returns:

Validator- the instance, ready to use.

Throws:

java.io.IOException - when errors in parsing occur.

validate

public ValidatorError validate(java.lang.String constraintName,
                               java.lang.Object objToValidate)

This will validate a data value (in String format) against a specific constraint, and return true if that value is valid for the constraint.

Parameters:

constraintName - the identifier in the constraints to validate this data against.

objToValidate - String data to validate.

Returns:

ValidatorError whether the data is valid or not.

getConstraints

public java.util.List getConstraints()

Get the list of Contraints associated with this Validator

Returns:

List of Constraint objects