/*
* 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.jclouds.blobstore.functions;
import static com.google.common.base.Preconditions.checkNotNull;
import java.io.IOException;
import javax.inject.Singleton;
import org.jclouds.http.HttpMessage;
import org.jclouds.io.PayloadEnclosing;
import org.jclouds.io.Payloads;
import com.google.common.base.Function;
import com.google.common.base.Throwables;
/**
*
* @author Adrian Cole
*/
@Singleton
public class ObjectMD5 implements Function<Object, byte[]> {
public byte[] apply(Object from) {
checkNotNull(from, "thing to md5");
PayloadEnclosing payloadEnclosing;
if (from instanceof PayloadEnclosing) {
payloadEnclosing = (PayloadEnclosing) from;
} else {
payloadEnclosing = HttpMessage.builder().payload(Payloads.newPayload(from)).build();
}
if (payloadEnclosing.getPayload().getContentMetadata().getContentMD5() == null)
try {
Payloads.calculateMD5(payloadEnclosing);
} catch (IOException e) {
Throwables.propagate(e);
}
return payloadEnclosing.getPayload().getContentMetadata().getContentMD5();
}
}