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1   /**
2    * Copyright (c) 2008-2012, 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  package org.pyyaml;
17  
18  import java.io.IOException;
19  import java.io.Reader;
20  import java.util.Iterator;
21  
22  import org.yaml.snakeyaml.Yaml;
23  import org.yaml.snakeyaml.composer.Composer;
24  import org.yaml.snakeyaml.error.YAMLException;
25  
26  public class CanonicalLoader extends Yaml {
27      @Override
28      public Object load(Reader yaml) {
29          try {
30              int ch = yaml.read();
31              StringBuilder buffer = new StringBuilder();
32              while (ch != -1) {
33                  buffer.append((char) ch);
34                  ch = yaml.read();
35              }
36              Composer composer = new Composer(new CanonicalParser(buffer.toString()), resolver);
37              constructor.setComposer(composer);
38              return constructor.getSingleData(Object.class);
39          } catch (IOException e) {
40              throw new YAMLException(e);
41          }
42      }
43  
44      public Iterable<Object> loadAll(Reader yaml) {
45          try {
46              int ch = yaml.read();
47              StringBuilder buffer = new StringBuilder();
48              while (ch != -1) {
49                  buffer.append((char) ch);
50                  ch = yaml.read();
51              }
52              Composer composer = new Composer(new CanonicalParser(buffer.toString()), resolver);
53              this.constructor.setComposer(composer);
54              Iterator<Object> result = new Iterator<Object>() {
55                  public boolean hasNext() {
56                      return constructor.checkData();
57                  }
58  
59                  public Object next() {
60                      return constructor.getData();
61                  }
62  
63                  public void remove() {
64                      throw new UnsupportedOperationException();
65                  }
66              };
67              return new YamlIterable(result);
68          } catch (IOException e) {
69              throw new YAMLException(e);
70          }
71      }
72  
73      private class YamlIterable implements Iterable<Object> {
74          private Iterator<Object> iterator;
75  
76          public YamlIterable(Iterator<Object> iterator) {
77              this.iterator = iterator;
78          }
79  
80          public Iterator<Object> iterator() {
81              return iterator;
82          }
83  
84      }
85  }