com.websina.license
Class LicenseManagerImpl

java.lang.Object
  com.websina.license.LicenseManager
      com.websina.license.LicenseManagerImpl

public class LicenseManagerImpl

extends LicenseManager

This class is shipped along with the product to the consumer. It is used to verify the license. The license is a text file also shipped to the comsumer.

Since:

1.0

Constructor Summary

protected

LicenseManagerImpl()

Method Summary

int	daysLeft() It returns how many days are left for the license.
java.lang.String	getFeature(java.lang.String name) This method is called by the license client to get the feature of the license.
boolean	isValid() It first checks the license itself is not tampered and is valid, and then checks the license is not expired.

Methods inherited from class com.websina.license.LicenseManager

getInstance

Methods inherited from class java.lang.Object

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

Constructor Detail

LicenseManagerImpl

protected LicenseManagerImpl()

Method Detail

isValid

public boolean isValid()
                throws java.security.GeneralSecurityException

It first checks the license itself is not tampered and is valid, and then checks the license is not expired. User should use getFeature(feature) for additional validation.

Specified by:

isValid in class LicenseManager

Returns:

whether or not the license is valid.

Throws:

java.security.GeneralSecurityException

daysLeft

public int daysLeft()

It returns how many days are left for the license. Here, 0 is valid, it may indicate a never expire license.

Specified by:

daysLeft in class LicenseManager

Returns:

how many days are left for the license.

getFeature

public java.lang.String getFeature(java.lang.String name)

This method is called by the license client to get the feature of the license. For example, user may use IP_Address as a feature, and encode a particular IP address inside the license. This IP is then checked against the machine when the user's software is running. One should first call isValid() before calling this method.

Specified by:

getFeature in class LicenseManager

Returns:

the feature value of the license.