/**
*
* Finds the appropriate service implementation and creates instance of the
* class that implements corresponding Service Provider Interface.
*
* @param algorithm
* @param service
* @param provider
* @throws NoSuchAlgorithmException
*/
public void getInstance(String algorithm, java.security.Provider provider,
Object param)
{//throws NoSuchAlgorithmException {
lock (this)
{
java.security.Provider.Service serv = null;
if (algorithm == null)
{
throw new java.security.NoSuchAlgorithmException(serviceName + " , algorithm is null"); //$NON-NLS-1$
}
serv = provider.getService(serviceName, algorithm);
if (serv == null)
{
throw new java.security.NoSuchAlgorithmException(serviceName + " " + algorithm + " implementation not found");
}
spi = serv.newInstance(param);
this.provider = provider;
}
}
private static TransformService findInstance(String algorithm,
String mechanismType, java.security.Provider provider)
{// throws NoSuchAlgorithmException {
if (provider == null)
{
provider = getProvider("TransformService", algorithm,
mechanismType);
}
java.security.Provider.Service ps = provider.getService("TransformService",
algorithm);
if (ps == null)
{
throw new java.security.NoSuchAlgorithmException("no such algorithm: " +
algorithm + " for provider " +
provider.getName());
}
TransformService ts = (TransformService)ps.newInstance(null);
ts.algorithm = algorithm;
ts.mechanism = mechanismType;
ts.provider = provider;
return(ts);
}
private static KeyInfoFactory findInstance(String mechanismType,
java.security.Provider provider)
{
if (provider == null)
{
provider = getProvider("KeyInfoFactory", mechanismType);
}
java.security.Provider.Service ps = provider.getService("KeyInfoFactory",
mechanismType);
if (ps == null)
{
throw new NoSuchMechanismException("Cannot find " + mechanismType +
" mechanism type");
}
try {
KeyInfoFactory fac = (KeyInfoFactory)ps.newInstance(null);
fac.mechanismType = mechanismType;
fac.provider = provider;
return(fac);
} catch (java.security.NoSuchAlgorithmException nsae) {
throw new NoSuchMechanismException("Cannot find " + mechanismType +
" mechanism type", nsae);
}
}