/**
* 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 com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;
import com.google.inject.name.Named;
import org.waveprotocol.box.server.CoreSettingsNames;
import org.waveprotocol.wave.crypto.SignerInfo;
import org.waveprotocol.wave.federation.Proto.ProtocolSignature;
import org.waveprotocol.wave.federation.Proto.ProtocolWaveletDelta;
import java.util.Collections;
/**
* Signature handler that doesn't sign deltas.
*/
public class NonSigningSignatureHandler implements SignatureHandler {
/**
* Guice {@link Provider} for the instance of {@link NonSigningSignatureHandler}
*/
@Singleton
public static class NonSigningSignatureHandlerProvider implements Provider<SignatureHandler> {
private final String waveDomain;
private NonSigningSignatureHandler signer = null;
@Inject
public NonSigningSignatureHandlerProvider(
@Named(CoreSettingsNames.WAVE_SERVER_DOMAIN) String waveDomain) {
this.waveDomain = waveDomain;
}
@Override
public NonSigningSignatureHandler get() {
synchronized (this) {
if (signer == null) {
signer = new NonSigningSignatureHandler(waveDomain);
}
}
return signer;
}
}
private final String domain;
public NonSigningSignatureHandler(String domain) {
this.domain = domain;
}
@Override
public String getDomain() {
return domain;
}
@Override
public SignerInfo getSignerInfo() {
return null;
}
@Override
public Iterable<ProtocolSignature> sign(ByteStringMessage<ProtocolWaveletDelta> delta) {
return Collections.emptyList();
}
}