You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
192 lines
7.0 KiB
192 lines
7.0 KiB
20 years ago
|
/*
|
||
|
* Check4Update is a stand-alone server application that can be used to
|
||
|
* monitor various types of online resources for updates and changes and
|
||
|
* notifies the user if a modification was detected.
|
||
|
*
|
||
|
* Copyright (C) 2005 Martin Thelian
|
||
|
*
|
||
|
* This program 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.
|
||
|
*
|
||
|
* This program 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 this program; if not, write to the Free Software Foundation,
|
||
|
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||
|
*
|
||
|
* For more information, please email thelian@users.sourceforge.net
|
||
|
*
|
||
|
*/
|
||
|
|
||
|
/* =======================================================================
|
||
|
* Revision Control Information
|
||
|
* $Source: $
|
||
|
* $Author: $
|
||
|
* $Date: $
|
||
|
* $Revision: $
|
||
|
* ======================================================================= */
|
||
|
|
||
|
package de.anomic.plasma;
|
||
|
|
||
|
import java.net.URL;
|
||
|
import java.util.HashMap;
|
||
|
import java.util.Iterator;
|
||
|
import java.util.Map;
|
||
|
|
||
|
public class plasmaParserDocument {
|
||
|
|
||
|
URL location; // the source url
|
||
|
String mimeType; // mimeType as taken from http header
|
||
|
String keywords; // most resources provide a keyword field
|
||
|
String shortTitle; // a shortTitle mostly appears in the window header (border)
|
||
|
String longTitle; // the real title of the document, commonly h1-tags
|
||
|
String[] sections; // if present: more titles/headlines appearing in the document
|
||
|
String abstrct; // an abstract, if present: short content description
|
||
|
byte[] text; // the clear text, all that is visible
|
||
|
Map anchors; // all links embedded as clickeable entities (anchor tags)
|
||
|
Map images; // all visible pictures in document
|
||
|
// the anchors and images - Maps are URL-to-EntityDescription mappings.
|
||
|
// The EntityDescription appear either as visible text in anchors or as alternative
|
||
|
// text in image tags.
|
||
|
Map hyperlinks;
|
||
|
Map medialinks;
|
||
|
Map emaillinks;
|
||
|
|
||
|
public plasmaParserDocument(URL location, String mimeType,
|
||
|
String keywords, String shortTitle, String longTitle,
|
||
|
String[] sections, String abstrct,
|
||
|
byte[] text, Map anchors, Map images) {
|
||
|
this.location = location;
|
||
|
this.mimeType = mimeType;
|
||
|
this.keywords = keywords;
|
||
|
this.shortTitle = shortTitle;
|
||
|
this.longTitle = longTitle;
|
||
|
this.sections = sections;
|
||
|
this.abstrct = abstrct;
|
||
|
this.text = text;
|
||
|
this.anchors = (anchors==null)?new HashMap():anchors;
|
||
|
this.images = (images==null)?new HashMap():images;
|
||
|
this.hyperlinks = null;
|
||
|
this.medialinks = null;
|
||
|
this.emaillinks = null;
|
||
|
}
|
||
|
|
||
|
private String absolutePath(String relativePath) {
|
||
|
try {
|
||
|
return plasmaParser.urlNormalform(new URL(location, relativePath));
|
||
|
} catch (Exception e) {
|
||
|
return "";
|
||
|
}
|
||
|
}
|
||
|
|
||
|
public String getMainShortTitle() {
|
||
|
if (shortTitle != null) return shortTitle; else return longTitle;
|
||
|
}
|
||
|
|
||
|
public String getMainLongTitle() {
|
||
|
if (longTitle != null) return longTitle; else return shortTitle;
|
||
|
}
|
||
|
|
||
|
public String[] getSectionTitles() {
|
||
|
if (sections != null) return sections; else return new String[]{getMainLongTitle()};
|
||
|
}
|
||
|
|
||
|
public String getAbstract() {
|
||
|
if (abstrct != null) return abstrct; else return getMainLongTitle();
|
||
|
}
|
||
|
|
||
|
public byte[] getText() {
|
||
|
// returns only the clear (visible) text (not the source data)
|
||
|
return text;
|
||
|
}
|
||
|
|
||
|
public Map getAnchors() {
|
||
|
// returns all links embedded as anchors (clickeable entities)
|
||
|
return anchors;
|
||
|
}
|
||
|
|
||
|
public Map getImages() {
|
||
|
// returns all links enbedded as pictures (visible iin document)
|
||
|
return images;
|
||
|
}
|
||
|
|
||
|
// the next three methods provide a calculated view on the getAnchors/getImages:
|
||
|
|
||
|
public Map getHyperlinks() {
|
||
|
// this is a subset of the getAnchor-set: only links to other hyperrefs
|
||
|
if (hyperlinks == null) resortLinks();
|
||
|
return hyperlinks;
|
||
|
}
|
||
|
|
||
|
public Map getMedialinks() {
|
||
|
// this is partly subset of getAnchor and getImage: all non-hyperrefs
|
||
|
if (medialinks == null) resortLinks();
|
||
|
return medialinks;
|
||
|
}
|
||
|
|
||
|
public Map getEmaillinks() {
|
||
|
// this is part of the getAnchor-set: only links to email addresses
|
||
|
if (emaillinks == null) resortLinks();
|
||
|
return emaillinks;
|
||
|
}
|
||
|
|
||
|
private synchronized void resortLinks() {
|
||
|
Iterator i;
|
||
|
String url;
|
||
|
int extpos;
|
||
|
String ext;
|
||
|
i = anchors.entrySet().iterator();
|
||
|
hyperlinks = new HashMap();
|
||
|
medialinks = new HashMap();
|
||
|
emaillinks = new HashMap();
|
||
|
Map.Entry entry;
|
||
|
while (i.hasNext()) {
|
||
|
entry = (Map.Entry) i.next();
|
||
|
url = (String) entry.getKey();
|
||
|
if ((url != null) && (url.startsWith("mailto:"))) {
|
||
|
emaillinks.put(url.substring(7), entry.getValue());
|
||
|
} else {
|
||
|
extpos = url.lastIndexOf(".");
|
||
|
String normal;
|
||
|
if (extpos > 0) {
|
||
|
ext = url.substring(extpos).toLowerCase();
|
||
|
normal = plasmaParser.urlNormalform(url);
|
||
|
if (normal != null) {
|
||
|
if (plasmaParser.mediaExt.indexOf(ext.substring(1)) >= 0) {
|
||
|
// this is not an normal anchor, its a media link
|
||
|
medialinks.put(normal, entry.getValue());
|
||
|
} else {
|
||
|
hyperlinks.put(normal, entry.getValue());
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
// finally add the images to the medialinks
|
||
|
i = images.entrySet().iterator();
|
||
|
String normal;
|
||
|
while (i.hasNext()) {
|
||
|
entry = (Map.Entry) i.next();
|
||
|
url = (String) entry.getKey();
|
||
|
normal = plasmaParser.urlNormalform(url);
|
||
|
if (normal != null) medialinks.put(normal, entry.getValue()); // avoid NullPointerException
|
||
|
}
|
||
|
expandHyperlinks();
|
||
|
}
|
||
|
|
||
|
|
||
|
public synchronized void expandHyperlinks() {
|
||
|
// we add artificial hyperlinks to the hyperlink set that can be calculated from
|
||
|
// given hyperlinks and imagelinks
|
||
|
hyperlinks.putAll(plasmaParser.allReflinks(hyperlinks));
|
||
|
hyperlinks.putAll(plasmaParser.allReflinks(medialinks));
|
||
|
hyperlinks.putAll(plasmaParser.allSubpaths(hyperlinks));
|
||
|
hyperlinks.putAll(plasmaParser.allSubpaths(medialinks));
|
||
|
}
|
||
|
|
||
|
}
|