PushContentRule


1   // Copyright 2005 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  
15  package org.apache.hivemind.schema.rules;
16  
17  import org.apache.hivemind.Element;
18  import org.apache.hivemind.schema.Rule;
19  import org.apache.hivemind.schema.SchemaProcessor;
20  import org.apache.hivemind.schema.Translator;
21  
22  /**
23   * A rule that reads the element's content, passes it through the content translator, then pushes
24   * the result onto the processor stack.
25   * 
26   * @since 1.1
27   * @author Knut Wannheden
28   */
29  public class PushContentRule extends BaseRule implements Rule
30  {
31      /**
32       * Uses the content translator to convert the element content into an object and pushes that
33       * object onto the processor stack.
34       */
35      public void begin(SchemaProcessor processor, Element element)
36      {
37          Translator t = processor.getContentTranslator();
38  
39          String   value = RuleUtils.processText(processor, element, element.getContent());
40  
41          Object   finalValue = t.translate(
42                  processor.getContributingModule(),
43                  Object  .class,
44                  value,
45                  element.getLocation());
46  
47          processor.push(finalValue);
48      }
49  
50      /**
51       * Invokes {@link SchemaProcessor#pop()}.
52       */
53      public void end(SchemaProcessor processor, Element element)
54      {
55          processor.pop();
56      }
57  }
58
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