| 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.io.payloads; |
| 20 | |
| 21 | import static com.google.common.io.Closeables.closeQuietly; |
| 22 | |
| 23 | import java.io.IOException; |
| 24 | import java.io.InputStream; |
| 25 | import java.util.List; |
| 26 | |
| 27 | import com.google.common.base.Throwables; |
| 28 | import com.google.common.collect.Lists; |
| 29 | import com.google.common.io.InputSupplier; |
| 30 | |
| 31 | /** |
| 32 | * @author Adrian Cole |
| 33 | */ |
| 34 | public class InputStreamSupplierPayload extends BasePayload<InputSupplier<? extends InputStream>> { |
| 35 | private List<InputStream> toClose = Lists.newArrayList(); |
| 36 | |
| 37 | public InputStreamSupplierPayload(InputSupplier<? extends InputStream> content) { |
| 38 | super(content); |
| 39 | } |
| 40 | |
| 41 | /** |
| 42 | * {@inheritDoc} |
| 43 | */ |
| 44 | @Override |
| 45 | public InputStream getInput() { |
| 46 | try { |
| 47 | InputStream returnVal = content.getInput(); |
| 48 | toClose.add(returnVal); |
| 49 | return returnVal; |
| 50 | } catch (IOException e) { |
| 51 | Throwables.propagate(e); |
| 52 | return null; |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | /** |
| 57 | * {@inheritDoc} |
| 58 | */ |
| 59 | @Override |
| 60 | public boolean isRepeatable() { |
| 61 | return true; |
| 62 | } |
| 63 | |
| 64 | /** |
| 65 | * if we created the stream, then it is already consumed on close. |
| 66 | */ |
| 67 | @Override |
| 68 | public void release() { |
| 69 | if (toClose.size() > 0) |
| 70 | for (InputStream content = toClose.remove(0); toClose.size() > 0; content = toClose.remove(0)) |
| 71 | closeQuietly(content); |
| 72 | } |
| 73 | |
| 74 | } |