RuntimeConfigDefsParser


1   /*
2    * RuntimeConfigDefsParser.java
3    *
4    * Created on June 4, 2005, 1:57 PM
5    */
6   
7   package org.roller.config.runtime;
8   
9   import java.io.IOException  ;
10  import java.io.InputStream  ;
11  import java.util.Iterator  ;
12  import java.util.List  ;
13  import org.jdom.Document;
14  import org.jdom.Element;
15  import org.jdom.JDOMException;
16  import org.jdom.input.SAXBuilder;
17  
18  
19  /**
20   * The parser for the rollerRuntimeConfigDefs.xml file.
21   * This class uses jdom to unmarshall the xml into a series of java objects.
22   *
23   * @author Allen Gilliland
24   */
25  public class RuntimeConfigDefsParser {
26      
27      /** Creates a new instance of RuntimeConfigDefsParser */
28      public RuntimeConfigDefsParser() {}
29      
30      
31      /**
32       * Unmarshall the given input stream into our defined
33       * set of Java objects.
34       **/
35      public RuntimeConfigDefs unmarshall(InputStream   instream) 
36          throws IOException  , JDOMException {
37          
38          RuntimeConfigDefs configs = new RuntimeConfigDefs();
39          
40          SAXBuilder builder = new SAXBuilder();
41          Document doc = builder.build(instream);
42          
43          Element root = doc.getRootElement();
44          List   configdefs = root.getChildren("config-def");
45          Iterator   iter = configdefs.iterator();
46          while (iter.hasNext()) {
47              Element e = (Element) iter.next();
48              configs.addConfigDef(this.elementToConfigDef(e));
49          }
50          
51          return configs;
52      }
53      
54      
55      private ConfigDef elementToConfigDef(Element element) {
56          
57          ConfigDef configdef = new ConfigDef();
58          
59          configdef.setName(element.getAttributeValue("name"));
60          
61          List   displaygroups = element.getChildren("display-group");
62          Iterator   iter = displaygroups.iterator();
63          while (iter.hasNext())
64          {
65              Element e = (Element) iter.next();
66              configdef.addDisplayGroup(this.elementToDisplayGroup(e));
67          }
68          
69          return configdef;
70      }
71      
72      
73      private DisplayGroup elementToDisplayGroup(Element element) {
74          
75          DisplayGroup displaygroup = new DisplayGroup();
76          
77          displaygroup.setName(element.getAttributeValue("name"));
78          displaygroup.setKey(element.getAttributeValue("key"));
79          
80          List   displaygroups = element.getChildren("property-def");
81          Iterator   iter = displaygroups.iterator();
82          while (iter.hasNext())
83          {
84              Element e = (Element) iter.next();
85              displaygroup.addPropertyDef(this.elementToPropertyDef(e));
86          }
87          
88          return displaygroup;
89      }
90      
91      
92      private PropertyDef elementToPropertyDef(Element element) {
93          
94          PropertyDef prop = new PropertyDef();
95          
96          prop.setName(element.getAttributeValue("name"));
97          prop.setKey(element.getAttributeValue("key"));
98          prop.setType(element.getChildText("type"));
99          prop.setDefaultValue(element.getChildText("default-value"));
100         
101         // optional elements
102         if(element.getChild("rows") != null)
103             prop.setRows(element.getChildText("rows"));
104         
105         if(element.getChild("cols") != null)
106             prop.setCols(element.getChildText("cols"));
107         
108         return prop;
109     }
110     
111 }
112
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