MethodElementInterpreter


1   /*
2     Copyright (C) 2002 Zachary Medico
3   
4     This program is free software; you can redistribute it and/or modify
5     it under the terms of the GNU Lesser General Public License as
6     published by the Free Software Foundation; either version 2 of the
7     License, or (at your option) any later version.
8   
9     This program is distributed in the hope that it will be useful,
10    but WITHOUT ANY WARRANTY; without even the implied warranty of
11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12    GNU Lesser General Public License for more details.
13  
14    You should have received a copy of the GNU Lesser General Public
15    License along with this program; if not, write to the Free Software
16    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
17    USA */
18  
19  package org.objectweb.jac.core.parsers.xml;
20  
21  
22  import org.apache.log4j.Logger;
23  import org.objectweb.jac.core.ConfigMethod;
24  import org.w3c.dom.*;
25  
26  public class MethodElementInterpreter {    
27      static Logger logger = Logger.getLogger("xml");
28  
29      public MethodElementInterpreter() {        
30      }    
31      
32      public ConfigMethod interpret(Element methodElement, Class   targetClass) 
33          throws Exception   
34      {
35          logger.debug("interpreting method "+methodElement.getAttribute("name"));
36          NodeList argElements = methodElement.getElementsByTagName("arg");
37          int argCount = argElements.getLength();
38          //      Class[] types = new Class[argCount];
39          Object  [] values = new Object  [argCount];
40              
41          for ( int argIndex=0; argIndex<argCount; argIndex++ ) {
42              Element argElement = (Element)argElements.item( argIndex );
43              values[argIndex] = interpretArgument(argElement);
44          }         
45          
46          return new ConfigMethod(methodElement.getAttribute("name"), values);
47      }  
48  
49      protected Object   interpretArgument(Element argElement) {
50          if (argElement.getAttribute("type").equals("java.lang.reflect.Array")) {
51              return interpretArray(argElement);
52          } else {
53              return argElement.getAttribute("value");
54          }
55      }
56  
57      /* handle Array arguments */
58      protected Object  [] interpretArray(Element argElement) 
59      {
60          NodeList itemElements = argElement.getElementsByTagName("item");
61          int itemCount = itemElements.getLength();
62          Object  [] array = new Object  [itemCount];
63          for (int i=0; i<itemCount; i++) {
64              Element itemElement = (Element)itemElements.item(i);
65              array[i] = interpretArgument(itemElement);
66          }
67          return array;
68      }
69  }
70
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