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1   /**
2    * Copyright (c) 2008-2011, 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   */
16  
17  package org.pyyaml;
18  
19  import java.io.IOException;
20  import java.io.Reader;
21  import java.util.Iterator;
22  
23  import org.yaml.snakeyaml.Yaml;
24  import org.yaml.snakeyaml.composer.Composer;
25  import org.yaml.snakeyaml.error.YAMLException;
26  
27  public class CanonicalLoader extends Yaml {
28      @Override
29      public Object load(Reader yaml) {
30          try {
31              int ch = yaml.read();
32              StringBuilder buffer = new StringBuilder();
33              while (ch != -1) {
34                  buffer.append((char) ch);
35                  ch = yaml.read();
36              }
37              Composer composer = new Composer(new CanonicalParser(buffer.toString()), resolver);
38              constructor.setComposer(composer);
39              return constructor.getSingleData(Object.class);
40          } catch (IOException e) {
41              throw new YAMLException(e);
42          }
43      }
44  
45      public Iterable<Object> loadAll(Reader yaml) {
46          try {
47              int ch = yaml.read();
48              StringBuilder buffer = new StringBuilder();
49              while (ch != -1) {
50                  buffer.append((char) ch);
51                  ch = yaml.read();
52              }
53              Composer composer = new Composer(new CanonicalParser(buffer.toString()), resolver);
54              this.constructor.setComposer(composer);
55              Iterator<Object> result = new Iterator<Object>() {
56                  public boolean hasNext() {
57                      return constructor.checkData();
58                  }
59  
60                  public Object next() {
61                      return constructor.getData();
62                  }
63  
64                  public void remove() {
65                      throw new UnsupportedOperationException();
66                  }
67              };
68              return new YamlIterable(result);
69          } catch (IOException e) {
70              throw new YAMLException(e);
71          }
72      }
73  
74      private class YamlIterable implements Iterable<Object> {
75          private Iterator<Object> iterator;
76  
77          public YamlIterable(Iterator<Object> iterator) {
78              this.iterator = iterator;
79          }
80  
81          public Iterator<Object> iterator() {
82              return iterator;
83          }
84  
85      }
86  }