+/* Copyright (C) 2001, HELM Team
+ *
+ * This file is part of UWOBO, developed at the Computer Science
+ * Department, University of Bologna, Italy.
+ *
+ * UWOBO is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * UWOBO is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with UWOBO; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ *
+ * For details, see the UWOBO World-Wide-Web page,
+ * http://cs.unibo.it/helm/uwobo
+ */
+
package it.unibo.cs.helm.uwobo;
import java.io.*;
*/
public class Server {
- private static class Style {
+ private static class Style implements Serializable {
public String fileName;
- public long lastModified;
public Templates stylesheet;
};
public static final String VERSION;
public static final String DATE;
public static final String TIME;
+ public static final String SERIALIZATION_DIR;
static {
Properties props = new Properties();
VERSION = props.getProperty("VERSION");
DATE = props.getProperty("DATE");
TIME = props.getProperty("TIME");
+ SERIALIZATION_DIR = props.getProperty("SERIALIZATION_DIR");
}
+ Server() {
+ if(!SERIALIZATION_DIR.equals("")) {
+ log("Looking for serialized stylesheets");
+ File [] serialized = new File(SERIALIZATION_DIR).listFiles();
+ if (serialized == null) {
+ log("Serialized stylesheets directory \"" + SERIALIZATION_DIR +
+ "\" not found");
+ } else {
+ for (int i = 0; i < serialized.length ; i++) {
+ File filename = serialized[i];
+ String key = filename.getName();
+ log("Found serialized stylesheet " + key);
+ log("Reloading serialized stylesheet \"" + filename + "\"... ");
+ FileInputStream istream;
+ try {
+ istream = new FileInputStream(filename);
+ ObjectInputStream p = new ObjectInputStream(istream);
+ Style style = (Style)p.readObject();
+ istream.close();
+ hashMap.put(key, style);
+ } catch (Exception e) {log(e.toString());};
+ }
+ log("Serialized stylesheets loaded!");
+ }
+ } else
+ log("Stylesheet serialization is off. Set the property SERIALIZATION_DIR to a non-empty value to turn it on.");
+
+ }
+
private final HashMap hashMap = new HashMap();
private static int logCounter = 0;
- private final Templates compileStylesheet(String xsl_file) throws TransformerConfigurationException, SAXException, IOException {
+ private final String compileStylesheet(Style style, String key) throws TransformerConfigurationException, SAXException, IOException {
StreamSource streamsource =
- new StreamSource(new URL(xsl_file).openStream());
- streamsource.setSystemId(xsl_file);
- return ((SAXTransformerFactory)TransformerFactory.newInstance())
- .newTemplates(streamsource);
+ new StreamSource(new URL(style.fileName).openStream());
+ streamsource.setSystemId(style.fileName);
+ Templates templates =
+ ((SAXTransformerFactory)TransformerFactory.newInstance())
+ .newTemplates(streamsource);
+ style.stylesheet = templates;
+ File serializationFile = new File(SERIALIZATION_DIR,key);
+ String res = "";
+ if(!SERIALIZATION_DIR.equals("")) {
+ try {
+ FileOutputStream ostream =
+ new FileOutputStream(serializationFile);
+ ObjectOutputStream p = new ObjectOutputStream(ostream);
+ p.writeObject(style);
+ p.flush();
+ ostream.close();
+ res =
+ "Stylesheet serialized in \"" + serializationFile + "\"";
+ log(res);
+ } catch (FileNotFoundException e) {
+ res = "Warning: Stylesheet not " +
+ "serialized. Error opening " + "file \"" +
+ serializationFile + "\"";
+ log(res);
+ res = htmlOfWarning(res);
+ }
+ }
+ return res;
}
private String getContentType(Templates templates) {
System.err.println(SERVERNAME + "[" + logCounter++ + "]: " + msg);
}
- public void add(String filename, String key) throws TransformerConfigurationException, SAXException, IOException {
+ public String add(String filename, String key) throws TransformerConfigurationException, SAXException, IOException {
+ log("processing stylesheet \"" + filename + "\" using key " + key + "... ");
if (hashMap.containsKey(key)) {
- log("there is already a stylesheet with keyword \"" + key + "\" (aborted)");
- return;
+ Style style = (Style)hashMap.get(key);
+ if (style.fileName.equals(filename)) {
+ String msg =
+ "Warning: Stylesheet already loaded. Request ignored.";
+ log(msg);
+ return htmlOfWarning(msg);
+ } else {
+ String res =
+ "Error: There is already a stylesheet with keyword \""+
+ key + "\" (aborted)";
+ log(res);
+ return htmlOfError(res);
+ }
}
Style style = new Style();
style.fileName = filename;
- style.lastModified = new File(filename).lastModified();
- log("processing stylesheet \"" + filename + "\"... ");
- style.stylesheet = compileStylesheet(filename);
- log("done!");
+ String res = compileStylesheet(style,key);
+ log("done!");
hashMap.put(key, style);
+ return res;
}
- public void removeAll()
- {
- String key;
- Style style;
+ public ArrayList removeAll() throws TransformerConfigurationException, SAXException, IOException {
+ ArrayList res = new ArrayList();
+ String log = "";
Iterator i = hashMap.keySet().iterator();
while (i.hasNext()) {
- key = (String)i.next();
- style = (Style)hashMap.get(key);
- log("removing \"" + key + " (" + style.fileName + ")");
- }
- hashMap.clear();
+ String key = (String)i.next();
+ Style style = (Style)hashMap.get(key);
+ String msg =
+ "removing \"" + key + " (" + style.fileName + ")";
+ res.add(msg);
+ log(msg);
+ msg = partialRemove(key,false);
+ if(!msg.equals(""))
+ res.add(msg);
+ }
+ hashMap.clear();
+ return res;
}
- public void remove(String key) {
+ private String partialRemove(String key, boolean removeFromHashTable) {
+ String res = "";
Style style = (Style)hashMap.get(key);
if (style != null) {
log("removing \"" + key + " (" + style.fileName + ")");
- hashMap.remove(key);
+ if (removeFromHashTable)
+ hashMap.remove(key);
+ if(!SERIALIZATION_DIR.equals("")) {
+ File to_delete = new File(SERIALIZATION_DIR,key);
+ if (!to_delete.delete()) {
+ res = "Warning: Serialized stylesheet \"" +
+ to_delete + "\" to remove not found";
+ log(res);
+ res = htmlOfWarning(res);
+ }
+ }
} else {
- log("error, stylesheet \"" + key + "\" not loaded");
+ res = "Error: stylesheet \"" + key + "\" not loaded";
+ log(res);
+ res = htmlOfError(res);
}
+ return res;
+ }
+
+ public String remove(String key) {
+ return partialRemove(key,true);
}
public String getContentType(String key) {
if (style != null) {
return getContentType(style.stylesheet);
} else {
- log("error, stylesheet \"" + key + "\" not loaded");
+ log("Error, stylesheet \"" + key + "\" not loaded");
return null;
}
}
return applyStylesheet(style.stylesheet, keys[idx].params, applyRec(keys, idx - 1, saxOutput));
}
}
-//FileNotFoundException
+
public void apply(String inFile, OutputStream outputStream, Key[] keys, Properties userProperties)
throws IOException, TransformerConfigurationException, SAXException, Exception
{
if (keys.length > 0) {
Style style = (Style) hashMap.get(rkeys[0].name);
if (style == null) {
- log("error, stylesheet \"" + rkeys[0].name + "\" not loaded");
+ log("Error, stylesheet \"" + rkeys[0].name + "\" not loaded");
return;
}
outputProperties = style.stylesheet.getOutputProperties();
// }
}
- public void reloadAll() throws TransformerConfigurationException, SAXException, IOException {
+ public ArrayList reloadAll() throws TransformerConfigurationException, SAXException, IOException {
+ ArrayList res = new ArrayList();
Iterator i = hashMap.keySet().iterator();
- while (i.hasNext())
- reload((String)i.next());
+ while (i.hasNext()) {
+ String key = (String)i.next();
+ Style style = (Style)hashMap.get(key);
+ String msg =
+ "reloading \"" + key + " (" + style.fileName + ")";
+ res.add(msg);
+ log(msg);
+ msg = reload(key);
+ if(!msg.equals(""))
+ res.add(msg);
+ }
+ return res;
}
- public void reload(String key) throws TransformerConfigurationException, SAXException, IOException {
+ public String reload(String key) throws TransformerConfigurationException, SAXException, IOException {
+ String res = "";
Style style = (Style)hashMap.get(key);
- if (style != null) {
- log("reloading \"" + key + "\"... ");
- style.stylesheet = compileStylesheet(style.fileName);
- style.lastModified = new File(style.fileName).lastModified();
- log("done!");
+ if (style != null) {
+ log("reloading \"" + key + "\"... ");
+ res= compileStylesheet(style,key);
+ log("done!");
} else {
- log("error, stylesheet \"" + key + "\" not loaded");
+ res = "Error: stylesheet \"" + key + "\" not loaded";
+ log(res);
+ res = htmlOfError(res);
}
+ return res;
}
- public void updateAll() throws TransformerConfigurationException, SAXException, IOException {
- Iterator i = hashMap.keySet().iterator();
- while (i.hasNext())
- update((String)i.next());
- }
+ private String htmlOfWarning(String message)
+ {
+ return "<b style=\"color: maroon\">" + message+"</b>";
+ }
- public void update(String key) throws TransformerConfigurationException, SAXException, IOException {
- Style style = (Style)hashMap.get(key);
- if (style != null) {
- log("updating \"" + key + "\"... ");
- File styleFile = new File(style.fileName);
- if (styleFile.lastModified() > style.lastModified) {
- style.stylesheet = compileStylesheet(style.fileName);
- style.lastModified = styleFile.lastModified();
- log("done!");
- } else {
- log("\"" + key + "\" is up to date");
- }
- } else {
- log("error, stylesheet \"" + key + "\" not loaded");
- }
- }
+ private String htmlOfError(String message)
+ {
+ return "<b style=\"color: red\">" + message+"</b>";
+ }
}
projects / helm.git / blobdiff