Java tutorial
/* * Copyright (C) 2009 eXo Platform SAS. * * This is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation; either version 2.1 of * the License, or (at your option) any later version. * * This software 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this software; if not, write to the Free * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA, or see the FSF site: http://www.fsf.org. */ package org.exoplatform.services.document.impl; import org.apache.poi.openxml4j.exceptions.InvalidFormatException; import org.apache.poi.openxml4j.exceptions.OpenXML4JException; import org.apache.poi.openxml4j.exceptions.OpenXML4JRuntimeException; import org.apache.poi.openxml4j.opc.OPCPackage; import org.apache.poi.xslf.XSLFSlideShow; import org.apache.poi.xslf.extractor.XSLFPowerPointExtractor; import org.apache.xmlbeans.XmlException; import org.exoplatform.commons.utils.SecurityHelper; import org.exoplatform.services.document.DocumentReadException; import org.exoplatform.services.log.ExoLogger; import org.exoplatform.services.log.Log; import java.io.IOException; import java.io.InputStream; import java.security.PrivilegedAction; import java.security.PrivilegedActionException; import java.security.PrivilegedExceptionAction; import java.util.Properties; /** * Created by The eXo Platform SAS A parser of Microsoft PowerPoint 2007 files (pptx). * * @author <a href="mailto:phunghainam@gmail.com">Phung Hai Nam</a> * @author Gennady Azarenkov * @author <a href="mailto:nikolazius@gmail.com">Nikolay Zamosenchuk</a> * @version $Id: MSXPPTDocumentReader.java 34360 2009-07-22 23:58:59Z nzamosenchuk $ */ public class MSXPPTDocumentReader extends BaseDocumentReader { private static final Log LOG = ExoLogger.getLogger("exo.core.component.document.MSXPPTDocumentReader"); /** * @see org.exoplatform.services.document.DocumentReader#getMimeTypes() */ public String[] getMimeTypes() { //Supported mimetypes: // "application/vnd.openxmlformats-officedocument.presentationml.presentation" -"x.pptx"; // "application/vnd.openxmlformats-officedocument.presentationml.slideshow" - "x.ppsx"; // "application/vnd.ms-powerpoint.presentation.macroenabled.12" - "testPPT.pptm"; // "application/vnd.ms-powerpoint.slideshow.macroenabled.12" - "testPPT.ppsm"; // //Not supported mimetypes: // "application/vnd.ms-powerpoint.template.macroenabled.12" - "testPPT.potm"; Has errors // "application/vnd.openxmlformats-officedocument.presentationml.template" - "x.potx"; Not tested // "application/vnd.ms-powerpoint.addin.macroenabled.12" - "x.ppam"; Not tested return new String[] { "application/vnd.openxmlformats-officedocument.presentationml.presentation", "application/vnd.openxmlformats-officedocument.presentationml.slideshow", "application/vnd.ms-powerpoint.presentation.macroenabled.12", "application/vnd.ms-powerpoint.slideshow.macroenabled.12" }; } /** * Returns only a text from .pptx file content. * * @param is an input stream with .pptx file content. * @return The string only with text from file content. */ public String getContentAsText(final InputStream is) throws IOException, DocumentReadException { if (is == null) { throw new IllegalArgumentException("InputStream is null."); } try { if (is.available() == 0) { return ""; } final XSLFPowerPointExtractor ppe; try { ppe = SecurityHelper .doPrivilegedExceptionAction(new PrivilegedExceptionAction<XSLFPowerPointExtractor>() { public XSLFPowerPointExtractor run() throws Exception { return new XSLFPowerPointExtractor(OPCPackage.open(is)); } }); } catch (PrivilegedActionException pae) { Throwable cause = pae.getCause(); if (cause instanceof IOException) { throw new DocumentReadException("Can't open presentation.", cause); } else if (cause instanceof OpenXML4JRuntimeException) { throw new DocumentReadException("Can't open presentation.", cause); } else if (cause instanceof OpenXML4JException) { throw new DocumentReadException("Can't open presentation.", cause); } else if (cause instanceof XmlException) { throw new DocumentReadException("Can't open presentation.", cause); } else if (cause instanceof RuntimeException) { throw (RuntimeException) cause; } else { throw new RuntimeException(cause); } } return SecurityHelper.doPrivilegedAction(new PrivilegedAction<String>() { public String run() { return ppe.getText(true, true); } }); } finally { if (is != null) { try { is.close(); } catch (IOException e) { if (LOG.isTraceEnabled()) { LOG.trace("An exception occurred: " + e.getMessage()); } } } } } public String getContentAsText(InputStream is, String encoding) throws IOException, DocumentReadException { // Ignore encoding return getContentAsText(is); } /* * (non-Javadoc) * * @see org.exoplatform.services.document.DocumentReader#getProperties(java.io. * InputStream) */ public Properties getProperties(final InputStream is) throws IOException, DocumentReadException { final POIPropertiesReader reader = new POIPropertiesReader(); try { SecurityHelper.doPrivilegedExceptionAction(new PrivilegedExceptionAction<Void>() { public Void run() throws Exception { reader.readDCProperties(new XSLFSlideShow(OPCPackage.open(is))); return null; } }); } catch (PrivilegedActionException pae) { Throwable cause = pae.getCause(); if (cause instanceof InvalidFormatException) { throw new DocumentReadException("Can't read properties from OOXML document", cause); } else if (cause instanceof OpenXML4JException) { throw new DocumentReadException("Can't read properties from OOXML document", cause); } else if (cause instanceof XmlException) { throw new DocumentReadException("Can't read properties from OOXML document", cause); } else if (cause instanceof RuntimeException) { throw (RuntimeException) cause; } else { throw new RuntimeException(cause); } } return reader.getProperties(); } }