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Java > Open Source Codes > com > sun > syndication > io > impl > ModuleParsers


1 /*
2  * Copyright 2004 Sun Microsystems, Inc.
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.sun.syndication.io.impl;
18
19 import com.sun.syndication.feed.module.Module;
20 import com.sun.syndication.io.ModuleParser;
21 import org.jdom.Element;
22 import org.jdom.Namespace;
23
24 import java.util.ArrayList JavaDoc;
25 import java.util.List JavaDoc;
26
27 /**
28  */
29 public class ModuleParsers extends PluginManager {
30
31     public ModuleParsers(String JavaDoc propertyKey) {
32         super(propertyKey);
33     }
34
35     public String JavaDoc getKey(Object JavaDoc obj) {
36         return ((ModuleParser)obj).getNamespaceUri();
37     }
38
39     public List JavaDoc getModuleNamespaces() {
40         return getKeys();
41     }
42
43     public List JavaDoc parseModules(Element root) {
44         List JavaDoc parsers = getPlugins();
45         List JavaDoc modules = null;
46         for (int i=0;i<parsers.size();i++) {
47             ModuleParser parser = (ModuleParser) parsers.get(i);
48             String JavaDoc namespaceUri = parser.getNamespaceUri();
49             Namespace namespace = Namespace.getNamespace(namespaceUri);
50             if (hasElementsFrom(root,namespace)) {
51                 Module module = parser.parse(root);
52                 if (module!=null) {
53                     if (modules==null) {
54                         modules = new ArrayList JavaDoc();
55                     }
56                     modules.add(module);
57                 }
58             }
59         }
60         return modules;
61     }
62
63
64     private boolean hasElementsFrom(Element root,Namespace namespace) {
65         boolean itHas = false;
66         List JavaDoc children = root.getChildren();
67         for (int i=0;!itHas && i<children.size();i++) {
68             Element child = (Element) children.get(i);
69             itHas = namespace.equals(child.getNamespace());
70         }
71        return itHas;
72     }
73
74
75 }
76
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