/*
* Copyright 2003 Federal Chancellery Austria
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package at.gv.egovernment.moa.spss.api;
import at.gv.egovernment.moa.spss.MOAException;
import org.apache.commons.discovery.tools.DiscoverClass;
import at.gv.egovernment.moa.spss.api.xmlsign.CreateXMLSignatureRequest;
import at.gv.egovernment.moa.spss.api.xmlsign.CreateXMLSignatureResponse;
/**
* Interface providing functions for signature creation.
*
* @author Patrick Peck
* @version $Id$
*/
public abstract class SignatureCreationService {
/** The default implementation class. */
private static final String DEFAULT_IMPLEMENTATION =
"at.gv.egovernment.moa.spss.server.invoke.SignatureCreationServiceImpl";
/** The single instance of this class. */
private static SignatureCreationService instance = null;
/**
* Get an instance of the SignatureCreationService
.
*
* @return A concrete instance of the SignatureCreationService
.
*/
public static synchronized SignatureCreationService getInstance() {
if (instance == null) {
try {
DiscoverClass discover = new DiscoverClass();
instance =
(SignatureCreationService) discover.newInstance(
SignatureCreationService.class,
DEFAULT_IMPLEMENTATION);
} catch (Exception e) {
// this can not happen since we provide a valid default
// implementation
}
}
return instance;
}
/**
* Create an XML signature.
*
* @param request Information on how to create the signature.
* @return A CreateXMLSignatureResponse
containing the
* signature.
* @throws MOAException Error in server side MOA module.
*/
public abstract CreateXMLSignatureResponse createXMLSignature(CreateXMLSignatureRequest request)
throws MOAException;
}