| 1 | /** |
| 2 | * |
| 3 | * Copyright (C) 2011 Cloud Conscious, LLC. <info@cloudconscious.com> |
| 4 | * |
| 5 | * ==================================================================== |
| 6 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | * you may not use this file except in compliance with the License. |
| 8 | * 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, software |
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | * See the License for the specific language governing permissions and |
| 16 | * limitations under the License. |
| 17 | * ==================================================================== |
| 18 | */ |
| 19 | package org.jclouds.blobstore.functions; |
| 20 | |
| 21 | import static com.google.common.base.Preconditions.checkArgument; |
| 22 | import static com.google.common.base.Preconditions.checkNotNull; |
| 23 | |
| 24 | import javax.inject.Singleton; |
| 25 | |
| 26 | import org.jclouds.blobstore.domain.Blob; |
| 27 | |
| 28 | import com.google.common.base.Function; |
| 29 | |
| 30 | /** |
| 31 | * |
| 32 | * @author Adrian Cole |
| 33 | */ |
| 34 | @Singleton |
| 35 | public class BlobName implements Function<Object, String> { |
| 36 | |
| 37 | public String apply(Object input) { |
| 38 | checkArgument(checkNotNull(input, "input") instanceof Blob, "this function is only valid for Blobs!"); |
| 39 | |
| 40 | return checkNotNull(Blob.class.cast(input).getMetadata().getName(), "blobName"); |
| 41 | } |
| 42 | |
| 43 | } |