Mercurial > hg > digilib-old
annotate servlet/src/digilib/io/XMLListLoader.java @ 86:997ba69afb81
New version 1.8b1.
With directory and file information cache.
With enhanceRGB method for color correction.
| author | robcast |
|---|---|
| date | Sun, 09 Mar 2003 21:37:27 +0100 |
| parents | 2ea78a56ecf8 |
| children | 398d39ee1014 |
| rev | line source |
|---|---|
| 1 | 1 /* XMLListLoader -- Load an XML list into a Hashtable |
| 2 | |
| 3 Digital Image Library servlet components | |
| 4 | |
| 5 Copyright (C) 2001, 2002 Robert Casties (robcast@mail.berlios.de) | |
| 6 | |
| 7 This program is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 9 Free Software Foundation; either version 2 of the License, or (at your | |
| 10 option) any later version. | |
| 11 | |
| 12 Please read license.txt for the full details. A copy of the GPL | |
| 13 may be found at http://www.gnu.org/copyleft/lgpl.html | |
| 14 | |
| 15 You should have received a copy of the GNU General Public License | |
| 16 along with this program; if not, write to the Free Software | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 */ | |
| 20 | |
| 21 package digilib.io; | |
| 22 | |
| 23 // JAXP packages | |
| 24 import javax.xml.parsers.*; | |
| 25 import org.xml.sax.*; | |
| 26 import org.xml.sax.helpers.*; | |
| 27 | |
| 28 import java.util.*; | |
| 29 import java.io.*; | |
| 30 | |
| 31 public class XMLListLoader { | |
| 32 | |
| 33 private String listTag = "list"; | |
| 34 private String entryTag = "entry"; | |
| 35 private String keyAtt = "key"; | |
| 36 private String valueAtt = "value"; | |
| 37 | |
| 38 public XMLListLoader() { | |
| 39 } | |
| 40 | |
| 41 public XMLListLoader(String list_tag, String entry_tag, String key_att, String value_att) { | |
| 42 //System.out.println("xmlListLoader("+list_tag+","+entry_tag+","+key_att+","+value_att+")"); | |
| 43 listTag = list_tag; | |
| 44 entryTag = entry_tag; | |
| 45 keyAtt = key_att; | |
| 46 valueAtt = value_att; | |
| 47 } | |
| 48 | |
| 49 /** | |
| 50 * inner class XMLListParser to be called by the parser | |
| 51 */ | |
| 52 private class XMLListParser extends DefaultHandler { | |
| 53 | |
| 54 private Hashtable listData; | |
| 55 private Stack nameSpace; | |
|
56
2ea78a56ecf8
Use system specific pathSeparator for documents paths (; on Win).
robcast
parents:
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diff
changeset
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56 |
| 1 | 57 public Hashtable getData() { |
| 58 return listData; | |
| 59 } | |
| 60 | |
| 61 // Parser calls this once at the beginning of a document | |
| 62 public void startDocument() throws SAXException { | |
| 63 listData = new Hashtable(); | |
| 64 nameSpace = new Stack(); | |
| 65 } | |
| 66 | |
| 67 // Parser calls this for each element in a document | |
| 68 public void startElement(String namespaceURI, String localName, | |
| 69 String qName, Attributes atts) | |
| 70 throws SAXException | |
| 71 { | |
| 72 //System.out.println("<"+qName); | |
| 73 // open a new namespace | |
| 74 nameSpace.push(qName); | |
| 75 | |
| 76 // ist it an entry tag? | |
| 77 if (qName.equals(entryTag)) { | |
| 78 // is it inside a list tag? | |
| 79 if ((listTag.length() > 0)&&(nameSpace.search(listTag) < 0)) { | |
| 80 System.out.println("BOO: Entry "+entryTag+" not inside list "+listTag); | |
| 81 throw new SAXParseException("Entry "+entryTag+" not inside list "+listTag, null); | |
| 82 } | |
| 83 // get the attributes | |
| 84 String key = atts.getValue(keyAtt); | |
| 85 String val = atts.getValue(valueAtt); | |
| 86 if ((key == null)||(val == null)) { | |
| 87 System.out.println("BOO: Entry "+entryTag+" does not have Attributes "+keyAtt+", "+valueAtt); | |
| 88 throw new SAXParseException("Entry "+entryTag+" does not have Attributes "+keyAtt+", "+valueAtt, null); | |
| 89 } | |
| 90 // add the values | |
| 91 //System.out.println("DATA: "+key+" = "+val); | |
| 92 listData.put(key, val); | |
| 93 } | |
| 94 } | |
| 95 | |
| 96 public void endElement(String namespaceURI, String localName, | |
| 97 String qName) | |
| 98 throws SAXException | |
| 99 { | |
| 100 // exit the namespace | |
| 101 nameSpace.pop(); | |
| 102 } | |
| 103 | |
| 104 } | |
| 105 | |
| 106 | |
| 107 /** | |
| 108 * load and parse a file (as URL) | |
| 109 * returns Hashtable with list data | |
| 110 */ | |
| 111 public Hashtable loadURL(String path) throws SAXException, IOException { | |
| 112 //System.out.println("loadurl ("+path+")"); | |
| 113 // Create a JAXP SAXParserFactory and configure it | |
| 114 SAXParserFactory spf = SAXParserFactory.newInstance(); | |
| 115 //spf.setNamespaceAware(true); | |
| 116 | |
| 117 XMLReader xmlReader = null; | |
| 118 try { | |
| 119 // Create a JAXP SAXParser | |
| 120 SAXParser saxParser = spf.newSAXParser(); | |
| 121 | |
| 122 // Get the encapsulated SAX XMLReader | |
| 123 xmlReader = saxParser.getXMLReader(); | |
| 124 } | |
| 125 catch (ParserConfigurationException e) { | |
| 126 throw new SAXException(e); | |
| 127 } | |
| 128 | |
| 129 // create a list parser (keeps the data!) | |
| 130 XMLListParser listParser = new XMLListParser(); | |
| 131 | |
| 132 // Set the ContentHandler of the XMLReader | |
| 133 xmlReader.setContentHandler(listParser); | |
| 134 | |
| 135 // Tell the XMLReader to parse the XML document | |
| 136 xmlReader.parse(path); | |
| 137 | |
| 138 return listParser.getData(); | |
| 139 } | |
| 140 | |
| 141 } |