ParserZeus


1   /*====================================================================
2   
3    ObjectWeb Util Launcher Package.
4    Copyright (C) 2004 INRIA & USTL - LIFL - GOAL
5    Contact: openccm@objectweb.org
6   
7    This library is free software; you can redistribute it and/or
8    modify it under the terms of the GNU Lesser General Public
9    License as published by the Free Software Foundation; either
10   version 2.1 of the License, or any later version.
11  
12   This library is distributed in the hope that it will be useful,
13   but WITHOUT ANY WARRANTY; without even the implied warranty of
14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15   Lesser General Public License for more details.
16  
17   You should have received a copy of the GNU Lesser General Public
18   License along with this library; if not, write to the Free Software
19   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
20   USA
21  
22   Initial developer(s): Romain Rouvoy.
23   Contributor(s): Christophe Contreras.
24  
25  --------------------------------------------------------------------
26  $Id: ParserZeus.java,v 1.3 2004/11/18 16:47:12 rouvoy Exp $
27  ====================================================================*/
28  
29  package org.objectweb.util.launcher.parser ;
30  
31  
32  import java.util.Iterator  ;
33  
34  import java.net.URL   ;
35  
36  import org.objectweb.util.launcher.LauncherException ;
37  import org.objectweb.util.trace.TraceSystem;
38  
39  
40  /**
41   * This class is an implementation of the Parser interface for providing 
42   * an XML parser using Zeus library.<BR>
43   * <p>
44   * This library uses the Zeus library for parsing the file.
45   * </p>
46   *
47   * @author <a HREF="mailto:Romain.Rouvoy@lifl.fr">Romain Rouvoy</a>
48   * @version 0.1
49   */
50  public class ParserZeus
51    implements Parser
52  {
53      /** List of parsed file (with includes). */
54      protected java.util.ArrayList   parsed_files_ ;
55  
56      /**
57       * Default constructor.
58       */
59      public ParserZeus() {
60          parsed_files_ = new java.util.ArrayList  ();
61      }
62  
63      /**
64       * Replace tags @NAME@ in a string.<BR>
65       * NAME must be a jave property.
66       *
67       * @param tagged - The string to replace.
68       *
69       * @return A new String with all tag replacements.
70       */
71      protected String   replaceTag(String   tagged) {
72          StringBuffer   result = new StringBuffer  ();
73          int start = 0;
74          int end = tagged.indexOf(RepositoryZeus.separator);
75          while(end != -1) {
76              result.append(tagged.substring(start,end));
77              start=end+1;
78              end= tagged.indexOf(RepositoryZeus.separator,start);
79              if (end != -1) {
80                  String   tag = tagged.substring(start,end);
81                  String   value = System.getProperty(tag);
82                  if (value == null)
83                      result.append("@"+tag+"@");
84                  else {
85                      TraceSystem.get("repository").debug("Replacing tag @"+tag+"@ with value "+value);
86                      result.append(value);
87                  }
88              }
89              start = end+1;
90              end = tagged.indexOf(RepositoryZeus.separator,start);
91          }
92          result.append(tagged.substring(start));
93          return result.toString();
94      }
95  
96      /**
97       * Reads a file using the Zeus library.
98       *
99       * @param url the url of the file to parse.
100      */
101     protected Launcher readFile(String   url) { 
102         try {
103             return readFile(new java.net.URL  (replaceTag(url))); 
104         } catch (Exception   ex) {
105             TraceSystem.get("decoder").error("Exception raised: "+ex);
106             throw new LauncherException(ex);
107         }
108     }
109 
110     /**
111      * Reads a file using the Zeus library.
112      *
113      * @param url the url of the file to parse.
114      */
115     protected Launcher readFile(URL   url) {
116         TraceSystem.get("parser").info("Reading "+url+" ...");
117         try {            
118             return LauncherUnmarshaller.unmarshal(url.openStream()) ;
119         } catch (java.io.IOException   e) {
120             TraceSystem.get("decoder").error("[I/O Error] : "+e);
121             throw new LauncherException(e);
122         }
123     }
124 
125     
126     /**
127      * Parses an XML file and load the content of the file in a ZeusRepository.
128      *
129      * @param config the parsed file.
130      * @return the Respository containing the descriptions.
131      */
132     protected RepositoryZeus parseFile(Launcher config) {
133         RepositoryZeus repository = new RepositoryZeus();
134         parseFile(repository,config);
135         return repository;   
136     }
137     
138     /**
139      * Parses an XML file and load the content of the file in a ZeusRepository.
140      *
141      * @param config the parsed file.
142      * @param repository the Respository containing the descriptions.
143      */
144     protected void parseFile(RepositoryZeus repository, Launcher config) {    
145         TraceSystem.get("parser").info("Zeus Parsing for "+config+" ...");
146         if (config.getIncludeList()!=null) {
147             for(Iterator   i = config.getIncludeList().iterator() ; i.hasNext() ;) {
148                 Include incl = (Include)i.next();            
149                 if ( !parsed_files_.contains(incl.getUrl()) ) {
150                     parsed_files_.add(incl.getUrl());
151                     parseFile(repository,readFile(incl.getUrl()));
152                 }
153             }
154         }
155 
156         if (config.getClasspathList()!=null) {
157             for(Iterator   i = config.getClasspathList().iterator() ; i.hasNext() ; ) {
158                 Classpath c = (Classpath)i.next();
159                 TraceSystem.get("parser").debug("Adding classpath "+c.getId()+" ...");
160                 repository.addClasspath(c.getId(),c);
161             }
162         }
163 
164         if (config.getArgumentsList()!=null) {
165             for(Iterator   i = config.getArgumentsList().iterator() ; i.hasNext() ; ) {
166                 Arguments a = (Arguments)i.next();              
167                 TraceSystem.get("parser").debug("Adding argument "+a.getId()+" ...");
168                 repository.addArgument(a.getId(),a);
169             }       
170         }
171 
172         if (config.getPropertiesList()!=null) {
173             for(Iterator   i = config.getPropertiesList().iterator() ; i.hasNext() ; ) {
174                 Properties p = (Properties)i.next();
175                 TraceSystem.get("parser").debug("Adding property "+p.getId()+" ...");
176                 repository.addProperty(p.getId(),p);
177             }
178         }
179 
180         if (config.getRunList()!=null) {
181             for(Iterator   i = config.getRunList().iterator() ; i.hasNext() ; ) {
182                 Run r = (Run)i.next();
183                 TraceSystem.get("parser").debug("Adding run "+r.getId()+" ...");
184                 repository.addRun(r.getId(), r);
185             }
186         }
187 
188         if (config.getContextList()!=null) {
189             for(Iterator   i = config.getContextList().iterator() ; i.hasNext() ; ) {
190                 Context c = (Context)i.next();
191                 TraceSystem.get("parser").debug("Adding context "+c.getId());
192                 repository.addContext(c.getId(), c);
193             }
194         }
195     }
196 
197 
198     /**
199      * Loads an XML file.
200      *
201      * @param url the url of the file to load.
202      */
203     public Repository load(String   url) {
204         return parseFile(readFile(url));
205     }
206 }
207
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