| 1 | /** |
| 2 | * Licensed to jclouds, Inc. (jclouds) under one or more |
| 3 | * contributor license agreements. See the NOTICE file |
| 4 | * distributed with this work for additional information |
| 5 | * regarding copyright ownership. jclouds licenses this file |
| 6 | * to you under the Apache License, Version 2.0 (the |
| 7 | * "License"); you may not use this file except in compliance |
| 8 | * with the License. You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, |
| 13 | * software distributed under the License is distributed on an |
| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 15 | * KIND, either express or implied. See the License for the |
| 16 | * specific language governing permissions and limitations |
| 17 | * under the License. |
| 18 | */ |
| 19 | package org.jclouds.blobstore.functions; |
| 20 | |
| 21 | import static com.google.common.base.Preconditions.checkNotNull; |
| 22 | |
| 23 | import java.io.IOException; |
| 24 | |
| 25 | import javax.inject.Inject; |
| 26 | import javax.inject.Singleton; |
| 27 | |
| 28 | import org.jclouds.crypto.Crypto; |
| 29 | import org.jclouds.http.HttpMessage; |
| 30 | import org.jclouds.io.PayloadEnclosing; |
| 31 | import org.jclouds.io.Payloads; |
| 32 | |
| 33 | import com.google.common.base.Function; |
| 34 | import com.google.common.base.Throwables; |
| 35 | |
| 36 | /** |
| 37 | * |
| 38 | * @author Adrian Cole |
| 39 | */ |
| 40 | @Singleton |
| 41 | public class ObjectMD5 implements Function<Object, byte[]> { |
| 42 | |
| 43 | protected final Crypto crypto; |
| 44 | |
| 45 | @Inject |
| 46 | ObjectMD5(Crypto crypto) { |
| 47 | this.crypto = checkNotNull(crypto, "crypto"); |
| 48 | } |
| 49 | |
| 50 | public byte[] apply(Object from) { |
| 51 | checkNotNull(from, "thing to md5"); |
| 52 | PayloadEnclosing payloadEnclosing; |
| 53 | if (from instanceof PayloadEnclosing) { |
| 54 | payloadEnclosing = (PayloadEnclosing) from; |
| 55 | } else { |
| 56 | payloadEnclosing = HttpMessage.builder().payload(Payloads.newPayload(from)).build(); |
| 57 | } |
| 58 | if (payloadEnclosing.getPayload().getContentMetadata().getContentMD5() == null) |
| 59 | try { |
| 60 | Payloads.calculateMD5(payloadEnclosing, crypto.md5()); |
| 61 | } catch (IOException e) { |
| 62 | Throwables.propagate(e); |
| 63 | } |
| 64 | return payloadEnclosing.getPayload().getContentMetadata().getContentMD5(); |
| 65 | } |
| 66 | |
| 67 | } |