Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
JSONWriterImpl |
|
| 2.0;2 |
1 | // Copyright 2006 The Apache Software Foundation | |
2 | // | |
3 | // Licensed under the Apache License, Version 2.0 (the "License"); | |
4 | // you may not use this file except in compliance with the License. | |
5 | // You may obtain a copy of the License at | |
6 | // | |
7 | // http://www.apache.org/licenses/LICENSE-2.0 | |
8 | // | |
9 | // Unless required by applicable law or agreed to in writing, software | |
10 | // distributed under the License is distributed on an "AS IS" BASIS, | |
11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
12 | // See the License for the specific language governing permissions and | |
13 | // limitations under the License. | |
14 | package org.apache.tapestry.markup; | |
15 | ||
16 | import java.io.PrintWriter; | |
17 | ||
18 | import org.apache.hivemind.util.Defense; | |
19 | import org.apache.tapestry.json.IJSONWriter; | |
20 | import org.apache.tapestry.json.JSONArray; | |
21 | import org.apache.tapestry.json.JSONObject; | |
22 | ||
23 | /** | |
24 | * Implementation of {@link IJSONWriter}. | |
25 | * | |
26 | * @author jkuhnert | |
27 | */ | |
28 | public class JSONWriterImpl implements IJSONWriter | |
29 | { | |
30 | /** Outputstream writer. */ | |
31 | protected PrintWriter _writer; | |
32 | ||
33 | /** | |
34 | * Delegate object that handles object json renders. | |
35 | */ | |
36 | private JSONObject _json; | |
37 | ||
38 | /** | |
39 | * Delegate array object that handles object array json renders. | |
40 | */ | |
41 | private JSONArray _array; | |
42 | ||
43 | /** | |
44 | * Creates a new instance that will write all content to | |
45 | * the specified {@link PrintWriter}. | |
46 | * | |
47 | * @param writer The outputstream to write to. | |
48 | */ | |
49 | public JSONWriterImpl(PrintWriter writer) | |
50 | 0 | { |
51 | 0 | Defense.notNull(writer, "writer"); |
52 | ||
53 | 0 | _writer = writer; |
54 | 0 | } |
55 | ||
56 | /** | |
57 | * | |
58 | * {@inheritDoc} | |
59 | */ | |
60 | public void close() | |
61 | { | |
62 | 0 | if (_json == null && _array == null) |
63 | 0 | _json = new JSONObject(); |
64 | ||
65 | 0 | if (_json != null) { |
66 | ||
67 | 0 | _writer.write(_json.toString()); |
68 | } | |
69 | ||
70 | 0 | if (_array != null) { |
71 | ||
72 | 0 | _writer.write(_array.toString()); |
73 | } | |
74 | ||
75 | 0 | _writer.flush(); |
76 | 0 | _writer.close(); |
77 | 0 | } |
78 | ||
79 | /** | |
80 | * {@inheritDoc} | |
81 | */ | |
82 | public JSONObject object() | |
83 | { | |
84 | 0 | if (_json == null) |
85 | 0 | _json = new JSONObject(); |
86 | ||
87 | 0 | return _json; |
88 | } | |
89 | ||
90 | /** | |
91 | * {@inheritDoc} | |
92 | */ | |
93 | public JSONArray array() | |
94 | { | |
95 | 0 | if (_array == null) |
96 | 0 | _array = new JSONArray(); |
97 | ||
98 | 0 | return _array; |
99 | } | |
100 | ||
101 | public void flush() | |
102 | { | |
103 | 0 | _writer.flush(); |
104 | 0 | } |
105 | ||
106 | /** | |
107 | * The outputstream being used to write this | |
108 | * instance's content. | |
109 | * | |
110 | * @return The writer being written to. | |
111 | */ | |
112 | protected PrintWriter getWriter() | |
113 | { | |
114 | 0 | return _writer; |
115 | } | |
116 | } |