/**
* Copyright 2010 Google Inc.
*
* 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 org.waveprotocol.box.server.waveserver;
import org.waveprotocol.wave.crypto.SignerInfo;
import org.waveprotocol.wave.federation.Proto.ProtocolSignature;
import org.waveprotocol.wave.federation.Proto.ProtocolWaveletDelta;
/**
* Instances of this class provide signature-related information and decide how
* deltas should be signed.
*/
public interface SignatureHandler {
interface Factory {
SignatureHandler getInstance();
}
/**
* @return the domain of this signer.
*/
String getDomain();
/**
* Returns the signer info associated with this signer or null if none is
* available.
*/
SignerInfo getSignerInfo();
/**
* Returns a list of the appropriate signatures for the specified delta.
*/
Iterable<ProtocolSignature> sign(ByteStringMessage<ProtocolWaveletDelta> delta);
}