1/**
2 * Copyright (c) 2008, http://www.snakeyaml.org
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *     http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16package org.yaml.snakeyaml;
17
18import java.io.ByteArrayOutputStream;
19import java.io.InputStream;
20import java.io.OutputStreamWriter;
21import java.io.UnsupportedEncodingException;
22import java.nio.charset.Charset;
23
24import org.yaml.snakeyaml.constructor.Constructor;
25
26public class YamlDocument {
27    public static final String ROOT = "specification/";
28    private String source;
29    private String presentation;
30    private Object nativeData;
31
32    public YamlDocument(String sourceName, boolean check, Constructor constructor) {
33        InputStream input = YamlDocument.class.getClassLoader().getResourceAsStream(
34                ROOT + sourceName);
35        if (constructor == null) {
36            constructor = new Constructor();
37        }
38        Yaml yaml = new Yaml(constructor);
39        nativeData = yaml.load(input);
40        ByteArrayOutputStream output = new ByteArrayOutputStream();
41        Charset charset = Charset.forName("UTF-8");
42        yaml.dump(nativeData, new OutputStreamWriter(output, charset));
43        try {
44            presentation = output.toString(charset.name());
45            source = Util.getLocalResource(ROOT + sourceName);
46        } catch (UnsupportedEncodingException e) {
47            throw new RuntimeException(e);
48        }
49        // try to read generated presentation to prove that the presentation
50        // is identical to the source
51        Object result = yaml.load(presentation);
52        if (check && !nativeData.equals(result)) {
53            throw new RuntimeException("Generated presentation is not valid: " + presentation);
54        }
55    }
56
57    public YamlDocument(String sourceName, boolean check) {
58        this(sourceName, check, null);
59    }
60
61    public YamlDocument(String sourceName) {
62        this(sourceName, true);
63    }
64
65    public String getSource() {
66        return source;
67    }
68
69    public String getPresentation() {
70        return presentation;
71    }
72
73    public Object getNativeData() {
74        if (nativeData == null) {
75            throw new NullPointerException("No object is parsed.");
76        }
77        return nativeData;
78    }
79}
80