License4J

java.lang.Object
|
+--com.smardec.license4j.LicenseManager

public final class LicenseManager

extends java.lang.Object

The main class for managing licenses.

Method Summary
static java.lang.String	generateStringKey(int length, java.lang.String secret) The method generates string key that can later be checked for validity by isStringKeyValid(String,String).
static boolean	isSerializeStrings() Indicates whether String feature values will be stored in the license in the serialized form.
static boolean	isStringKeyValid(java.lang.String key, java.lang.String secret) Validates string key generated by generateStringKey(int,String).
static boolean	isValid(License license) Indicates whether the license is valid.
static License	loadLicense(java.io.InputStream stream) Loads license from the specified InputStream.
static License	loadLicense(java.lang.String filename) Loads license from the specified file.
static void	saveLicense(License license, java.lang.String filename) Saves the license to the specified file.
static void	saveLicense(License license, java.io.Writer writer) Saves the license to the specified Writer.
static void	setPrivateKey(java.lang.String key) Sets private key.
static void	setPublicKey(java.lang.String key) Sets public key.
static void	setSerializeStrings(boolean serializeStrings) Specifies whether String feature values will be stored in the license in the serialized form.

Methods inherited from class java.lang.Object

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

Method Detail

isSerializeStrings
public static boolean isSerializeStrings()

Indicates whether String feature values will be stored in the license in the serialized form. If true than String objects will be serialized. The default is false.

Returns:

true if String objects will be serialized, false otherwise. The default is false.

Specifies whether String feature values will be stored in the license in the serialized form. If true than String objects will be serialized. The default is false.

Parameters:

serializeStrings - true if String objects should be serialized, false otherwise. The default is false

Sets private key. Private key is needed only to create licenses.

Parameters:

key - private key

Sets public key. Public key is needed only to validate licenses.

Parameters:

key - public key

Loads license from the specified file.

Parameters:

filename - name of the license file

Returns:

License object.

Throws:

LicenseNotFoundException - if the license cannot be read

Loads license from the specified InputStream.

Parameters:

stream - InputStream that contains license information

Returns:

License object.

Throws:

LicenseNotFoundException - if the license cannot be read

Saves the license to the specified file.

Parameters:

license - License object to write

filename - name of the file

Throws:

java.security.GeneralSecurityException - if private key is not initialized by setPrivateKey(String)

java.lang.IllegalArgumentException - if license has no features

java.io.IOException - if the specified file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason

Saves the license to the specified Writer. Note that Writer.close() method is not invoked after writing the license.

Parameters:

license - License object to write

writer - Writer object

Throws:

java.security.GeneralSecurityException - if private key is not initialized by setPrivateKey(String)

java.lang.IllegalArgumentException - if license has no features

java.io.IOException - if an I/O error occurs

Indicates whether the license is valid.

Parameters:

license - license to check

Returns:

true if the license is valid, false otherwise.

Throws:

java.security.GeneralSecurityException - if public key is not initialized by setPublicKey(String)

The method generates string key that can later be checked for validity by isStringKeyValid(String,String).

Parameters:

length - the desired length of the key in symbols, should be even number greater than 8

secret - secret string used to generate and validate keys (your passphrase)

Returns:

generated key, always has even length

Validates string key generated by generateStringKey(int,String).

Parameters:

key - the key

secret - secret string used to generate and validate keys (your passphrase)

Returns:

true if the key is valid, false otherwise