Java tutorial
/* * MediathekView * Copyright (C) 2008 W. Xaver * W.Xaver[at]googlemail.com * http://zdfmediathk.sourceforge.net/ * * 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 3 of the License, or * 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, see <http://www.gnu.org/licenses/>. */ package msearch.io; import com.fasterxml.jackson.core.JsonEncoding; import com.fasterxml.jackson.core.JsonFactory; import com.fasterxml.jackson.core.JsonGenerator; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStreamWriter; import java.util.ListIterator; import java.util.zip.ZipEntry; import java.util.zip.ZipOutputStream; import javax.xml.stream.XMLOutputFactory; import javax.xml.stream.XMLStreamException; import javax.xml.stream.XMLStreamWriter; import msearch.daten.DatenFilm; import msearch.daten.ListeFilme; import msearch.tool.MSConst; import msearch.tool.MSLog; import org.apache.commons.compress.compressors.bzip2.BZip2CompressorOutputStream; import org.tukaani.xz.LZMA2Options; import org.tukaani.xz.XZOutputStream; public class MSFilmlisteSchreiben { private XMLStreamWriter writer; private OutputStreamWriter out = null; private ZipOutputStream zipOutputStream = null; private BZip2CompressorOutputStream bZip2CompressorOutputStream = null; public void filmlisteSchreibenJson(String datei, ListeFilme listeFilme) { MSLog.systemMeldung("Filme Schreiben (" + listeFilme.size() + " Filme) :"); File file = new File(datei); File dir = new File(file.getParent()); if (!dir.exists()) { if (!dir.mkdirs()) { MSLog.fehlerMeldung(915236478, MSLog.FEHLER_ART_PROG, "MSearchIoXmlFilmlisteSchreiben.xmlSchreibenStart", "Kann den Pfad nicht anlegen: " + dir.toString()); } } MSLog.systemMeldung(" --> Start Schreiben nach: " + datei); try { String sender = "", thema = ""; JsonFactory jsonF = new JsonFactory(); JsonGenerator jg; if (datei.endsWith(MSConst.FORMAT_XZ)) { LZMA2Options options = new LZMA2Options(); XZOutputStream out = new XZOutputStream(new FileOutputStream(file), options); jg = jsonF.createGenerator(out); } else if (datei.endsWith(MSConst.FORMAT_BZ2)) { bZip2CompressorOutputStream = new BZip2CompressorOutputStream(new FileOutputStream(file), 9 /*Blocksize: 1 - 9*/); jg = jsonF.createGenerator(bZip2CompressorOutputStream, JsonEncoding.UTF8); } else if (datei.endsWith(MSConst.FORMAT_ZIP)) { zipOutputStream = new ZipOutputStream(new FileOutputStream(file)); ZipEntry entry = new ZipEntry(MSConst.XML_DATEI_FILME); zipOutputStream.putNextEntry(entry); jg = jsonF.createGenerator(zipOutputStream, JsonEncoding.UTF8); } else { jg = jsonF.createGenerator(new File(datei), JsonEncoding.UTF8); } jg.useDefaultPrettyPrinter(); // enable indentation just to make debug/testing easier jg.writeStartObject(); // Infos zur Filmliste jg.writeArrayFieldStart(ListeFilme.FILMLISTE); for (int i = 0; i < ListeFilme.MAX_ELEM; ++i) { jg.writeString(listeFilme.metaDaten[i]); } jg.writeEndArray(); // Infos der Felder in der Filmliste jg.writeArrayFieldStart(ListeFilme.FILMLISTE); for (int i = 0; i < DatenFilm.COLUMN_NAMES_JSON.length; ++i) { jg.writeString(DatenFilm.COLUMN_NAMES[DatenFilm.COLUMN_NAMES_JSON[i]]); } jg.writeEndArray(); //Filme schreiben ListIterator<DatenFilm> iterator; DatenFilm datenFilm; iterator = listeFilme.listIterator(); while (iterator.hasNext()) { datenFilm = iterator.next(); jg.writeArrayFieldStart(DatenFilm.FILME_); for (int i = 0; i < DatenFilm.COLUMN_NAMES_JSON.length; ++i) { int m = DatenFilm.COLUMN_NAMES_JSON[i]; if (m == DatenFilm.FILM_SENDER_NR) { if (datenFilm.arr[m].equals(sender)) { jg.writeString(""); } else { sender = datenFilm.arr[m]; jg.writeString(datenFilm.arr[m]); } } else if (m == DatenFilm.FILM_THEMA_NR) { if (datenFilm.arr[m].equals(thema)) { jg.writeString(""); } else { thema = datenFilm.arr[m]; jg.writeString(datenFilm.arr[m]); } } else { jg.writeString(datenFilm.arr[m]); } } jg.writeEndArray(); } jg.writeEndObject(); jg.close(); MSLog.systemMeldung(" --> geschrieben!"); } catch (Exception ex) { MSLog.fehlerMeldung(846930145, MSLog.FEHLER_ART_PROG, "IoXmlSchreiben.FilmeSchreiben", ex, "nach: " + datei); } } public void filmlisteSchreibenXml(String datei, ListeFilme listeFilme) { try { MSLog.systemMeldung("Filme Schreiben"); xmlSchreibenStart(datei); xmlSchreibenFilmliste(listeFilme); xmlSchreibenEnde(datei); } catch (Exception ex) { MSLog.fehlerMeldung(846930145, MSLog.FEHLER_ART_PROG, "IoXmlSchreiben.FilmeSchreiben", ex, "nach: " + datei); } } private void xmlSchreibenStart(String datei) throws IOException, XMLStreamException { File file = new File(datei); File dir = new File(file.getParent()); if (!dir.exists()) { if (!dir.mkdirs()) { MSLog.fehlerMeldung(947623049, MSLog.FEHLER_ART_PROG, "MSearchIoXmlFilmlisteSchreiben.xmlSchreibenStart", "Kann den Pfad nicht anlegen: " + dir.toString()); } } MSLog.systemMeldung(" --> Start Schreiben nach: " + datei); XMLOutputFactory outFactory = XMLOutputFactory.newInstance(); if (datei.endsWith(MSConst.FORMAT_BZ2)) { bZip2CompressorOutputStream = new BZip2CompressorOutputStream(new FileOutputStream(file), 9 /*Blocksize: 1 - 9*/); out = new OutputStreamWriter(bZip2CompressorOutputStream, MSConst.KODIERUNG_UTF); } else if (datei.endsWith(MSConst.FORMAT_ZIP)) { zipOutputStream = new ZipOutputStream(new FileOutputStream(file)); ZipEntry entry = new ZipEntry(MSConst.XML_DATEI_FILME); zipOutputStream.putNextEntry(entry); out = new OutputStreamWriter(zipOutputStream, MSConst.KODIERUNG_UTF); } else { out = new OutputStreamWriter(new FileOutputStream(file), MSConst.KODIERUNG_UTF); } writer = outFactory.createXMLStreamWriter(out); writer.writeStartDocument("UTF-8", "1.0"); writer.writeCharacters("\n");//neue Zeile writer.writeStartElement(MSConst.XML_START); writer.writeCharacters("\n");//neue Zeile } private void xmlSchreibenFilmliste(ListeFilme listeFilme) throws XMLStreamException { //Filmliste Metadaten schreiben listeFilme.metaDaten[ListeFilme.FILMLISTE_VERSION_NR] = MSConst.VERSION_FILMLISTE; xmlSchreibenDaten(ListeFilme.FILMLISTE, ListeFilme.COLUMN_NAMES, listeFilme.metaDaten); // Feldinfo schreiben int xmlMax = DatenFilm.COLUMN_NAMES.length; try { writer.writeStartElement(DatenFilm.FELD_INFO); writer.writeCharacters("\n");//neue Zeile for (int i = 0; i < xmlMax; ++i) { writer.writeStartElement(DatenFilm.COLUMN_NAMES_XML[i]); writer.writeCharacters(DatenFilm.COLUMN_NAMES[i]); writer.writeEndElement(); writer.writeCharacters("\n");//neue Zeile } writer.writeEndElement(); writer.writeCharacters("\n");//neue Zeile } catch (Exception ex) { MSLog.fehlerMeldung(638214005, MSLog.FEHLER_ART_PROG, "IoXmlSchreiben.xmlSchreibenFeldInfo", ex); } // Filme schreiben ListIterator<DatenFilm> iterator; DatenFilm datenFilm; String sender = "", thema = ""; DatenFilm datenFilmSchreiben = new DatenFilm(); iterator = listeFilme.listIterator(); while (iterator.hasNext()) { datenFilm = iterator.next(); System.arraycopy(datenFilm.arr, 0, datenFilmSchreiben.arr, 0, datenFilm.arr.length); if (sender.equals(datenFilm.arr[DatenFilm.FILM_SENDER_NR])) { datenFilmSchreiben.arr[DatenFilm.FILM_SENDER_NR] = ""; } else { sender = datenFilm.arr[DatenFilm.FILM_SENDER_NR]; } if (thema.equals(datenFilm.arr[DatenFilm.FILM_THEMA_NR])) { datenFilmSchreiben.arr[DatenFilm.FILM_THEMA_NR] = ""; } else { thema = datenFilm.arr[DatenFilm.FILM_THEMA_NR]; } datenFilmSchreiben.clean(); xmlSchreibenDaten(DatenFilm.FILME_, DatenFilm.COLUMN_NAMES_XML, datenFilmSchreiben.arr); } } private void xmlSchreibenDaten(String xmlName, String[] xmlSpalten, String[] datenArray) throws XMLStreamException { int xmlMax = datenArray.length; writer.writeStartElement(xmlName); for (int i = 0; i < xmlMax; ++i) { if (!datenArray[i].equals("")) { writer.writeStartElement(xmlSpalten[i]); writer.writeCharacters(datenArray[i]); writer.writeEndElement(); } } writer.writeEndElement(); writer.writeCharacters("\n");//neue Zeile } private void xmlSchreibenEnde(String datei) throws Exception { writer.writeEndElement(); writer.writeEndDocument(); writer.flush(); if (datei.endsWith(MSConst.FORMAT_BZ2)) { writer.close(); out.close(); bZip2CompressorOutputStream.close(); } else if (datei.endsWith(MSConst.FORMAT_ZIP)) { zipOutputStream.closeEntry(); writer.close(); out.close(); zipOutputStream.close(); } else { writer.close(); out.close(); } MSLog.systemMeldung(" --> geschrieben!"); } }