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// This Source Code is in the Public Domain per: http://litesoft.org/License.txt package org.litesoft.encryption.symmetric; import org.litesoft.commonfoundation.typeutils.*; import java.util.*; public class SymmetricEncryptorManagerImpl implements SymmetricEncryptorManager { private static final String SYMMETRIC_ENCRYPTOR_GET_IDENTIFIER_AND_VERSION = "SymmetricEncryptor.getIdentifierAndVersion()"; private Map<String, SymmetricEncryptor> mSymmetricEncryptors = new HashMap<String, SymmetricEncryptor>(); private SymmetricEncryptor mSymmetricEncryptor; /** * @return a non-null SHORT string with NO leading or trailing whitespace that contains an Idetifier * for the Implementation and a Version Number (colons ':' are NOT allowed to be in this String) */ private void validateSymmetricEncryptorID( String pIdentifierAndVersion ) { Strings.assertNotNullNotEmpty( SYMMETRIC_ENCRYPTOR_GET_IDENTIFIER_AND_VERSION, pIdentifierAndVersion ); Strings.assertNoLeadingOrTrailingWhiteSpace( SYMMETRIC_ENCRYPTOR_GET_IDENTIFIER_AND_VERSION, pIdentifierAndVersion ); if ( pIdentifierAndVersion.indexOf( ':' ) != -1 ) { throw new IllegalArgumentException( "Colon (':') not allowed in the " + SYMMETRIC_ENCRYPTOR_GET_IDENTIFIER_AND_VERSION ); } } public SymmetricEncryptorManagerImpl() { setSymmetricEncryptor( BrainDeadSymmetricEncryptor.INSTANCE ); } public synchronized void addDecryptor( SymmetricEncryptor pSymmetricEncryptor ) { if ( pSymmetricEncryptor != null ) { String zIdentifierAndVersion = pSymmetricEncryptor.getIdentifierAndVersion(); validateSymmetricEncryptorID( zIdentifierAndVersion ); mSymmetricEncryptors.put( zIdentifierAndVersion, pSymmetricEncryptor ); } } public void setSymmetricEncryptor( SymmetricEncryptor pSymmetricEncryptor ) { if ( pSymmetricEncryptor != null ) { addDecryptor( pSymmetricEncryptor ); mSymmetricEncryptor = pSymmetricEncryptor; } } public synchronized SymmetricEncryptor getSymmetricEncryptor() { return mSymmetricEncryptor; } public synchronized SymmetricEncryptor getSymmetricEncryptor( String pIdentifierAndVersion ) { return pIdentifierAndVersion != null ? mSymmetricEncryptors.get( pIdentifierAndVersion ) : null; } } |