| 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 static com.google.common.collect.Iterables.concat; |
| 22 | import static com.google.common.collect.Iterables.filter; |
| 23 | import static com.google.common.collect.Iterables.transform; |
| 24 | import static com.google.common.collect.Lists.newArrayList; |
| 25 | import static com.google.common.collect.Sets.newLinkedHashSet; |
| 26 | |
| 27 | import java.util.List; |
| 28 | import java.util.Set; |
| 29 | |
| 30 | import javax.inject.Singleton; |
| 31 | |
| 32 | import org.jclouds.blobstore.domain.BlobMetadata; |
| 33 | import org.jclouds.blobstore.domain.StorageMetadata; |
| 34 | import org.jclouds.blobstore.domain.StorageType; |
| 35 | import org.jclouds.blobstore.options.ListContainerOptions; |
| 36 | import org.jclouds.blobstore.strategy.ListBlobsInContainer; |
| 37 | import org.jclouds.blobstore.strategy.ListContainerStrategy; |
| 38 | |
| 39 | import com.google.common.base.Function; |
| 40 | import com.google.common.base.Predicate; |
| 41 | import com.google.inject.Inject; |
| 42 | |
| 43 | /** |
| 44 | * Retrieves all blobs in the blobstore by the most efficient means possible. |
| 45 | * |
| 46 | * @author Adrian Cole |
| 47 | */ |
| 48 | @Singleton |
| 49 | public class ListContainerAndRecurseThroughFolders implements ListBlobsInContainer { |
| 50 | |
| 51 | protected final ListContainerStrategy lister; |
| 52 | |
| 53 | @Inject |
| 54 | ListContainerAndRecurseThroughFolders(ListContainerStrategy lister) { |
| 55 | this.lister = lister; |
| 56 | } |
| 57 | |
| 58 | @Override |
| 59 | public Set<? extends BlobMetadata> execute(final String containerName, final ListContainerOptions options) { |
| 60 | final List<Iterable<? extends BlobMetadata>> lists = newArrayList(); |
| 61 | Iterable<? extends StorageMetadata> pwdList = lister.execute(containerName, options); |
| 62 | for (StorageMetadata md : filter(pwdList, new Predicate<StorageMetadata>() { |
| 63 | @Override |
| 64 | public boolean apply(StorageMetadata input) { |
| 65 | return (input.getType() == StorageType.FOLDER || input.getType() == StorageType.RELATIVE_PATH) |
| 66 | && options.isRecursive(); |
| 67 | } |
| 68 | })) { |
| 69 | String directory = (options.getDir() != null) ? options.getDir() + "/" + md.getName() : md.getName(); |
| 70 | lists.add(execute(containerName, options.clone().inDirectory(directory))); |
| 71 | } |
| 72 | lists.add(transform(filter(pwdList, new Predicate<StorageMetadata>() { |
| 73 | @Override |
| 74 | public boolean apply(StorageMetadata input) { |
| 75 | return input.getType() == StorageType.BLOB; |
| 76 | } |
| 77 | }), new Function<StorageMetadata, BlobMetadata>() { |
| 78 | @Override |
| 79 | public BlobMetadata apply(StorageMetadata from) { |
| 80 | return (BlobMetadata) from; |
| 81 | } |
| 82 | })); |
| 83 | return newLinkedHashSet(concat(lists)); |
| 84 | } |
| 85 | } |