Mercurial > hg > Members > sugi > MessagePack-java

comparison src/main/java/org/msgpack/template/CollectionTemplate.java @ 0:cb825acd883a

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author sugi
date Sat, 18 Oct 2014 15:06:15 +0900
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1 //
2 // MessagePack for Java
3 //
4 // Copyright (C) 2009 - 2013 FURUHASHI Sadayuki
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 package org.msgpack.template;
19
20 import java.io.IOException;
21 import java.util.Collection;
22 import java.util.LinkedList;
23 import org.msgpack.packer.Packer;
24 import org.msgpack.unpacker.Unpacker;
25 import org.msgpack.MessageTypeException;
26
27 public class CollectionTemplate<E> extends AbstractTemplate<Collection<E>> {
28 private Template<E> elementTemplate;
29
30 public CollectionTemplate(Template<E> elementTemplate) {
31 this.elementTemplate = elementTemplate;
32 }
33
34 public void write(Packer pk, Collection<E> target, boolean required)
35 throws IOException {
36 if (target == null) {
37 if (required) {
38 throw new MessageTypeException("Attempted to write null");
39 }
40 pk.writeNil();
41 return;
42 }
43 Collection<E> col = target;
44 pk.writeArrayBegin(col.size());
45 for (E e : col) {
46 elementTemplate.write(pk, e);
47 }
48 pk.writeArrayEnd();
49 }
50
51 public Collection<E> read(Unpacker u, Collection<E> to, boolean required)
52 throws IOException {
53 if (!required && u.trySkipNil()) {
54 return null;
55 }
56 int n = u.readArrayBegin();
57 if (to == null) {
58 to = new LinkedList<E>();
59 } else {
60 to.clear();
61 }
62 for (int i = 0; i < n; i++) {
63 E e = elementTemplate.read(u, null);
64 to.add(e);
65 }
66 u.readArrayEnd();
67 return to;
68 }
69 }