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Viewing changes to src/org/herac/tuxguitar/gui/editors/chord/xml/ChordReader.java

  • Committer: Bazaar Package Importer
  • Author(s): Philippe Coval
  • Date: 2008-06-19 00:30:30 UTC
  • mto: (5.1.2 sid)
  • mto: This revision was merged to the branch mainline in revision 3.
  • Revision ID: james.westby@ubuntu.com-20080619003030-h719szrhsngou7c6
Tags: upstream-1.0
Import upstream version 1.0

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src/org/herac/tuxguitar/gui/editors/chord/xml/ChordReader.java
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package org.herac.tuxguitar.gui.editors.chord.xml;
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import java.io.File;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.List;
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import javax.xml.parsers.DocumentBuilder;
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import javax.xml.parsers.DocumentBuilderFactory;
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import javax.xml.parsers.ParserConfigurationException;
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import org.herac.tuxguitar.song.models.Chord;
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import org.w3c.dom.Document;
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import org.w3c.dom.NamedNodeMap;
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import org.w3c.dom.Node;
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import org.w3c.dom.NodeList;
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import org.xml.sax.SAXException;
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public class ChordReader {
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        private static final String ACTION_ATTRIBUTE = "action";
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        private static final String KEYS_ATTRIBUTE = "keys";
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        private static final String CHORD_LIST_TAG = "chords";
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        private static final String CHORD_TAG = "chord";
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        private static final String CHORD_NAME_ATTRIBUTE = "name";
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        private static final String CHORD_STRINGS_ATTRIBUTE = "strings";
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        private static final String STRING_TAG = "string";
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        private static final String STRING_NUMBER_ATTRIBUTE = "number";
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        private static final String STRING_FRET_ATTRIBUTE = "fret";
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    public static List getChords(String fileName) {
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        List chords = new ArrayList();
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        try{
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                File file = new File(fileName);        
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                if (file.exists()){
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                        Document doc = getDocument(file);
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                        loadChords(doc.getFirstChild(),chords);
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                }
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        }catch(Exception e){
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                e.printStackTrace();
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        }        
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        return chords;
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    }
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    private static Document getDocument(File file) {
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        Document document = null;
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        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
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        try {
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            DocumentBuilder builder = factory.newDocumentBuilder();
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            document = builder.parse(file);
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        } catch (SAXException sxe) {
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            sxe.printStackTrace();
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        } catch (ParserConfigurationException pce) {
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            pce.printStackTrace();
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        } catch (IOException ioe) {
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            ioe.printStackTrace();
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        }
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        return document;
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    }
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    /**
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     * Read shortcuts from xml file
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     * 
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     * @param shortcutsNode
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     * @return
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     */
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    private static void loadChords(Node chordsNode,List chords){
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        try{
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                NodeList chordList = chordsNode.getChildNodes();
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                for (int i = 0; i < chordList.getLength(); i++) {
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                        Node chordItem = chordList.item(i);
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                        if (chordItem.getNodeName().equals(CHORD_TAG)) {
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                                NamedNodeMap chordAttributes = chordItem.getAttributes();
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                                String name = chordAttributes.getNamedItem(CHORD_NAME_ATTRIBUTE).getNodeValue();
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                                String strings = chordAttributes.getNamedItem(CHORD_STRINGS_ATTRIBUTE).getNodeValue();
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                                Chord chord = new Chord(Integer.parseInt(strings));
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                                chord.setName(name);
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                                NodeList stringList = chordItem.getChildNodes();
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                                for (int j = 0; j < stringList.getLength(); j++) {
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                                        Node stringItem = stringList.item(j);                
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                                        if (stringItem.getNodeName().equals(STRING_TAG)) {
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                                                NamedNodeMap stringAttributes = stringItem.getAttributes();
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                                                String number = stringAttributes.getNamedItem(STRING_NUMBER_ATTRIBUTE).getNodeValue();
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                                                String fret = stringAttributes.getNamedItem(STRING_FRET_ATTRIBUTE).getNodeValue();
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                                                chord.addFretValue(Integer.parseInt(number),Integer.parseInt(fret));
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                                        }       
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                                }
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                                chords.add(chord);
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                        }
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                }
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        }catch(Exception e){
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                chords.clear();
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                e.printStackTrace();
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        }
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    }
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}