itemtag.java

dspace 用j2ee架构的一个数字图书馆.开源程序

            {
                out
                        .print("<tr><td headers=\"s1\"class=\"metadataFieldLabel\">");
                out.print(values[i].schema);
                out.print("." + values[i].element);

                if (values[i].qualifier != null)
                {
                    out.print("." + values[i].qualifier);
                }

                out
                        .print("</td><td headers=\"s2\" class=\"metadataFieldValue\">");
                out.print(Utils.addEntities(values[i].value));
                out
                        .print("</td><td headers=\"s3\" class=\"metadataFieldValue\">");

                if (values[i].language == null)
                {
                    out.print("-");
                }
                else
                {
                    out.print(values[i].language);
                }

                out.println("</td></tr>");
            }
        }

        listCollections();

        out.println("</table></center><br/>");

        listBitstreams();

        if (ConfigurationManager
                .getBooleanProperty("webui.licence_bundle.show"))
        {
            out.println("<br/><br/>");
            showLicence();
        }
    }

    /**
     * List links to collections if information is available
     */
    private void listCollections() throws IOException
    {
        JspWriter out = pageContext.getOut();
        HttpServletRequest request = (HttpServletRequest) pageContext
                .getRequest();

        if (collections != null)
        {
            out.print("<tr><td class=\"metadataFieldLabel\">"
                    + LocaleSupport.getLocalizedMessage(pageContext,
                            "org.dspace.app.webui.jsptag.ItemTag.appears")
                    + "</td><td class=\"metadataFieldValue\">");

            for (int i = 0; i < collections.length; i++)
            {
                out.print("<a href=\"");
                out.print(request.getContextPath());
                out.print("/handle/");
                out.print(collections[i].getHandle());
                out.print("\">");
                out.print(collections[i].getMetadata("name"));
                out.print("</a><br/>");
            }

            out.println("</td></tr>");
        }
    }

    /**
     * List bitstreams in the item
     */
    private void listBitstreams() throws IOException
    {
        JspWriter out = pageContext.getOut();
        HttpServletRequest request = (HttpServletRequest) pageContext
                .getRequest();

        out.print("<table align=\"center\" class=\"miscTable\"><tr>");
        out.println("<td class=\"evenRowEvenCol\"><p><strong>"
                + LocaleSupport.getLocalizedMessage(pageContext,
                        "org.dspace.app.webui.jsptag.ItemTag.files")
                + "</strong></p>");

        try
        {
        	Bundle[] bundles = item.getBundles("ORIGINAL");

        	if (bundles.length == 0)
        	{
        		out.println("<p>"
        				+ LocaleSupport.getLocalizedMessage(pageContext,
                            "org.dspace.app.webui.jsptag.ItemTag.files.no")
                            + "</p>");
        	}
        	else
        	{
        		boolean html = false;
        		String handle = item.getHandle();
        		Bitstream primaryBitstream = null;

        		Bundle[] bunds = item.getBundles("ORIGINAL");
        		Bundle[] thumbs = item.getBundles("THUMBNAIL");

        		// if item contains multiple bitstreams, display bitstream
        		// description
        		boolean multiFile = false;
        		Bundle[] allBundles = item.getBundles();

        		for (int i = 0, filecount = 0; (i < allBundles.length)
                    	&& !multiFile; i++)
        		{
        			filecount += allBundles[i].getBitstreams().length;
        			multiFile = (filecount > 1);
        		}

        		// check if primary bitstream is html
        		if (bunds[0] != null)
        		{
        			Bitstream[] bits = bunds[0].getBitstreams();

        			for (int i = 0; (i < bits.length) && !html; i++)
        			{
        				if (bits[i].getID() == bunds[0].getPrimaryBitstreamID())
        				{
        					html = bits[i].getFormat().getMIMEType().equals(
        							"text/html");
        					primaryBitstream = bits[i];
        				}
        			}
        		}

        		out
                    .println("<table cellpadding=\"6\"><tr><th id=\"t1\" class=\"standard\">"
                            + LocaleSupport.getLocalizedMessage(pageContext,
                                    "org.dspace.app.webui.jsptag.ItemTag.file")
                            + "</th>");

        		if (multiFile)
        		{

        			out
                        .println("<th id=\"t2\" class=\"standard\">"
                                + LocaleSupport
                                        .getLocalizedMessage(pageContext,
                                                "org.dspace.app.webui.jsptag.ItemTag.description")
                                + "</th>");
        		}

        		out.println("<th id=\"t3\" class=\"standard\">"
                    + LocaleSupport.getLocalizedMessage(pageContext,
                            "org.dspace.app.webui.jsptag.ItemTag.filesize")
                    + "</th><th id=\"t4\" class=\"standard\">"
                    + LocaleSupport.getLocalizedMessage(pageContext,
                            "org.dspace.app.webui.jsptag.ItemTag.fileformat")
                    + "</th></tr>");

            	// if primary bitstream is html, display a link for only that one to
            	// HTMLServlet
            	if (html)
            	{
            		// If no real Handle yet (e.g. because Item is in workflow)
            		// we use the 'fake' Handle db-id/1234 where 1234 is the
            		// database ID of the item.
            		if (handle == null)
            		{
            			handle = "db-id/" + item.getID();
            		}

            		out.print("<tr><td headers=\"t1\" class=\"standard\">");
            		out.print(primaryBitstream.getName());

            		if (multiFile)
            		{
            			out.print("</td><td headers=\"t2\" class=\"standard\">");

            			String desc = primaryBitstream.getDescription();
            			out.print((desc != null) ? desc : "");
            		}

            		out.print("</td><td headers=\"t3\" class=\"standard\">");
            		out.print(primaryBitstream.getSize() / 1024);
            		out.print("Kb</td><td headers=\"t4\" class=\"standard\">");
            		out.print(primaryBitstream.getFormatDescription());
            		out
                        .print("</td><td class=\"standard\"><a target=\"_blank\" href=\"");
            		out.print(request.getContextPath());
            		out.print("/html/");
            		out.print(handle + "/");
            		out
                        .print(UIUtil.encodeBitstreamName(primaryBitstream
                                .getName(), Constants.DEFAULT_ENCODING));
            		out.print("\">"
                        + LocaleSupport.getLocalizedMessage(pageContext,
                                "org.dspace.app.webui.jsptag.ItemTag.view")
                        + "</a></td></tr>");
            	}	
            	else
            	{
            		for (int i = 0; i < bundles.length; i++)
            		{
            			Bitstream[] bitstreams = bundles[i].getBitstreams();

            			for (int k = 0; k < bitstreams.length; k++)
            			{
            				// Skip internal types
            				if (!bitstreams[k].getFormat().isInternal())
            				{
            					out
                                    .print("<tr><td headers=\"t1\" class=\"standard\">");
            					out.print(bitstreams[k].getName());

            					if (multiFile)
            					{
            						out
                                        .print("</td><td headers=\"t2\" class=\"standard\">");

            						String desc = bitstreams[k].getDescription();
            						out.print((desc != null) ? desc : "");
            					}

            					out
                                    .print("</td><td headers=\"t3\" class=\"standard\">");
            					out.print(bitstreams[k].getSize() / 1024);
            					out
                                    .print("Kb</td><td headers=\"t4\" class=\"standard\">");
            					out.print(bitstreams[k].getFormatDescription());
            					out
                                    .print("</td><td class=\"standard\" align=\"center\">");

            					// Work out what the bitstream link should be
            					// (persistent
            					// ID if item has Handle)
            					String bsLink = "<a target=\"_blank\" href=\""
                                    	+ request.getContextPath();

            					if ((handle != null)
            							&& (bitstreams[k].getSequenceID() > 0))
            					{
            						bsLink = bsLink + "/bitstream/"
                                        	+ item.getHandle() + "/"
                                        	+ bitstreams[k].getSequenceID() + "/";
            					}
            					else
            					{
            						bsLink = bsLink + "/retrieve/"
                                        	+ bitstreams[k].getID() + "/";
            					}

            					bsLink = bsLink
                                    	+ UIUtil.encodeBitstreamName(bitstreams[k]
                                            .getName(),
                                            Constants.DEFAULT_ENCODING) + "\">";

            					// is there a thumbnail bundle?
            					if ((thumbs.length > 0) && showThumbs)
            					{
            						String tName = bitstreams[k].getName() + ".jpg";
            						Bitstream tb = thumbs[0]
                                        .	getBitstreamByName(tName);

            						if (tb != null)
            						{
            							String myPath = request.getContextPath()
                                            	+ "/retrieve/"
                                            	+ tb.getID()
                                            	+ "/"
                                            	+ UIUtil.encodeBitstreamName(tb
                                            			.getName(),
                                            			Constants.DEFAULT_ENCODING);

            							out.print(bsLink);
            							out.print("<img src=\"" + myPath + "\" ");
            							out.print("alt=\"" + tName
            									+ "\" /></a><br />");
            						}
            					}

            					out
                                    .print(bsLink
                                            + LocaleSupport
                                                    .getLocalizedMessage(
                                                            pageContext,
                                                            "org.dspace.app.webui.jsptag.ItemTag.view")
                                            + "</a></td></tr>");
            				}
            			}
            		}
            	}

            	out.println("</table>");
        	}
        }
        catch(SQLException sqle)
        {
        	throw new IOException(sqle.getMessage());
        }

        out.println("</td></tr></table>");
    }

    private void getThumbSettings()
    {
        showThumbs = ConfigurationManager
                .getBooleanProperty("webui.item.thumbnail.show");
    }

    /**
     * Link to the item licence
     */
    private void showLicence() throws IOException
    {
        JspWriter out = pageContext.getOut();
        HttpServletRequest request = (HttpServletRequest) pageContext
                .getRequest();

        Bundle[] bundles = null;
        try
        {
        	bundles = item.getBundles("LICENSE");
        }
        catch(SQLException sqle)
        {
        	throw new IOException(sqle.getMessage());
        }

        out.println("<table align=\"center\" class=\"attentionTable\"><tr>");

        out.println("<td class=\"attentionCell\"><p><strong>"
                + LocaleSupport.getLocalizedMessage(pageContext,
                        "org.dspace.app.webui.jsptag.ItemTag.itemprotected")
                + "</strong></p>");

        for (int i = 0; i < bundles.length; i++)
        {
            Bitstream[] bitstreams = bundles[i].getBitstreams();

            for (int k = 0; k < bitstreams.length; k++)
            {
                out.print("<div align=\"center\" class=\"standard\">");
                out.print("<strong><a target=\"_blank\" href=\"");
                out.print(request.getContextPath());
                out.print("/retrieve/");
                out.print(bitstreams[k].getID() + "/");
                out.print(UIUtil.encodeBitstreamName(bitstreams[k].getName(),
                        Constants.DEFAULT_ENCODING));
                out
                        .print("\">"
                                + LocaleSupport
                                        .getLocalizedMessage(pageContext,
                                                "org.dspace.app.webui.jsptag.ItemTag.viewlicence")
                                + "</a></strong></div>");
            }
        }

        out.println("</td></tr></table>");
    }

    /**
     * Find the style to use for a particular collection from dspace.cfg
     */
    private void getStyleFor(Collection c)
    {
        if (collectionStyles == null)
        {
            readCollectionStyleConfig();
        }

        String collStyle = (String) collectionStyles.get(c.getHandle());

        if (collStyle == null)
        {
            // No specific style specified for this collection
            style = "default";
            return;
        }

        // Specific style specified. Check style exists
        if (ConfigurationManager.getProperty("webui.itemdisplay." + collStyle) == null)
        {
            log
                    .warn("dspace.cfg specifies undefined item metadata display style '"
                            + collStyle
                            + "' for collection "
                            + c.getHandle()
                            + ".  Using default");
            style = "default";
            return;
        }

        // Style specified & exists
        style = collStyle;
    }

    private static void readCollectionStyleConfig()
    {
        collectionStyles = new HashMap();

        Enumeration e = ConfigurationManager.propertyNames();

        while (e.hasMoreElements())
        {
            String key = (String) e.nextElement();

            if (key.startsWith("webui.itemdisplay.")
                    && key.endsWith(".collections"))
            {
                String styleName = key.substring("webui.itemdisplay.".length(),
                        key.length() - ".collections".length());

                String[] collections = ConfigurationManager.getProperty(key)
                        .split(",");

                for (int i = 0; i < collections.length; i++)
                {
                    collectionStyles.put(collections[i].trim(), styleName
                            .toLowerCase());
                }

            }
        }
    }
}