/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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);
}