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1   /*
2    * Copyright (C) 2010 Atlassian
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 com.atlassian.jira.rest.client.internal.json;
18  
19  import org.codehaus.jettison.json.JSONException;
20  import org.codehaus.jettison.json.JSONObject;
21  
22  class JsonWeakParserForJsonObject<T> implements JsonWeakParser<T> {
23      private final JsonParser<T> jsonParser;
24  
25      public JsonWeakParserForJsonObject(JsonParser<T> jsonParser) {
26          this.jsonParser = jsonParser;
27      }
28  
29      private <T> T convert(Object o, Class<T> clazz) throws JSONException {
30          try {
31              return clazz.cast(o);
32          } catch (ClassCastException e) {
33              throw new JSONException("Expected [" + clazz.getSimpleName() + "], but found [" + o.getClass().getSimpleName() + "]");
34          }
35      }
36      
37      @Override
38      public T parse(Object o) throws JSONException {
39          return jsonParser.parse(convert(o, JSONObject.class));
40      }
41  }