SingleType


1   /*
2    * Copyright (c) 2005, Rob Gordon.
3    */
4   package org.oddjob.values.types;
5   
6   import org.oddjob.arooa.ArooaContext;
7   import org.oddjob.arooa.ArooaHandler;
8   import org.oddjob.arooa.handlers.ValueHandler;
9   import org.oddjob.arooa.reflect.IntrospectionHelper;
10  
11  /**
12   * Wrapper for any one thing which forces the thing to be created using the
13   * factory. OutputStream for instance which can be text, buffer, file etc.
14   * 
15   * @author Rob Gordon.
16   */
17  public class SingleType {
18      
19      private Object   wrapper;
20              
21      public void addValue(Object   type) {     
22          wrapper = type;
23      }
24      
25      /**
26       * Return the value for this type. Defers to the nested value type.
27       * @param required The required class.
28       * @return The value.
29       */
30      public Object   valueFor(Class   required) {
31          return IntrospectionHelper.valueFor(wrapper, required);
32      }
33      
34      /**
35       * Provide our own handler for the values.
36       * 
37       * @param context Not required.
38       * @return Our handler.
39       */
40      public ArooaHandler handlerFor(ArooaContext context) {
41          // a handler that will call the addValue method.
42          return new ValueHandler("");
43      }
44   
45      public String   toString() {
46          if (wrapper == null) {
47              return null;
48          }
49          return wrapper.toString();
50      }
51  
52  }
53

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