| 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.strategy.internal; |
| 20 | |
| 21 | import java.util.Arrays; |
| 22 | |
| 23 | import javax.inject.Inject; |
| 24 | import javax.inject.Singleton; |
| 25 | |
| 26 | import org.jclouds.blobstore.domain.BlobMetadata; |
| 27 | import org.jclouds.blobstore.functions.ObjectMD5; |
| 28 | import org.jclouds.blobstore.internal.BlobRuntimeException; |
| 29 | import org.jclouds.blobstore.options.ListContainerOptions; |
| 30 | import org.jclouds.blobstore.strategy.ContainsValueInListStrategy; |
| 31 | import org.jclouds.blobstore.strategy.ListBlobsInContainer; |
| 32 | |
| 33 | import com.google.common.base.Throwables; |
| 34 | |
| 35 | /** |
| 36 | * Searches Content-MD5 tag for the value associated with the value |
| 37 | * |
| 38 | * @author Adrian Cole |
| 39 | */ |
| 40 | @Singleton |
| 41 | public class FindMD5InList implements ContainsValueInListStrategy { |
| 42 | |
| 43 | protected final ObjectMD5 objectMD5; |
| 44 | protected final ListBlobsInContainer getAllBlobMetadata; |
| 45 | |
| 46 | @Inject |
| 47 | private FindMD5InList(ObjectMD5 objectMD5, ListBlobsInContainer getAllBlobMetadata) { |
| 48 | this.objectMD5 = objectMD5; |
| 49 | this.getAllBlobMetadata = getAllBlobMetadata; |
| 50 | } |
| 51 | |
| 52 | public boolean execute(String containerName, Object value, ListContainerOptions options) { |
| 53 | try { |
| 54 | byte[] toSearch = objectMD5.apply(value); |
| 55 | for (BlobMetadata metadata : getAllBlobMetadata.execute(containerName, options)) { |
| 56 | if (Arrays.equals(toSearch, metadata.getContentMetadata().getContentMD5())) |
| 57 | return true; |
| 58 | } |
| 59 | return false; |
| 60 | } catch (Exception e) { |
| 61 | Throwables.propagateIfPossible(e, BlobRuntimeException.class); |
| 62 | throw new BlobRuntimeException(String.format( |
| 63 | "Error searching for ETAG of value: [%2$s] in container:%1$s", containerName, |
| 64 | value), e); |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | } |