taglibraryinfoimpl.java

低版本的tomcat 对于有些老版本的应用还真的需要老版的中间件

	    
		Constants.message("jsp.message.copyinguri", 
	                          new Object[] { uri, jarFileName },
				  Logger.DEBUG);
	    
		if (relativeURL)
		    copy(getResourceAsStream(uri),
			 jarFileName);
		else
		    copy(url.openStream(), jarFileName);
	    
	        ctxt.addJar(jarFileName);
	    }
            */ // END NOT COMPILED
	    boolean tldFound = false;
	    ZipEntry entry;
	    while ((entry = zin.getNextEntry()) != null) {
		if (entry.getName().equals(TLD)) {
		    /*******
		     * This hack is necessary because XML reads until the end 
		     * of an inputstream -- does not use available()
		     * -- and closes the inputstream when it can't
		     * read no more.
		     */
		    
		    // BEGIN HACK
		    ByteArrayOutputStream baos = new ByteArrayOutputStream();
		    int b;
		    while (zin.available() != 0) {
			b = zin.read();
			if (b == -1)
			    break;
			baos.write(b);
		    }

		    baos.close();
		    ByteArrayInputStream bais 
			= new ByteArrayInputStream(baos.toByteArray());
		    // END HACK
		    tldFound = true;
		    parseTLD(bais);
		} else {
		    ByteArrayOutputStream baos = new ByteArrayOutputStream();
		    int b;
		    while (zin.available() != 0) {
			b = zin.read();
			if (b == -1)
			    break;
			baos.write(b);
		    }
		    baos.close();
		    jarEntries.put(entry.getName(), baos.toByteArray());
		}
		zin.closeEntry();
	    }
	    
	    if (!tldFound)
		throw new JasperException(Constants.getString("jsp.error.tld_not_found",
							      new Object[] {
		    TLD
			}
							      ));
	} // Take this out (END of if(endsWith("jar")))
    }
    
    /** Returns true if the given URI is relative in this web application, false if it is an internet URI.
     */
    private boolean isRelativeURI(String uri) {
        return (uri.indexOf(':') == -1);
    }
    
        
    private void parseTLD(InputStream in) 
        throws JasperException
    {
	tld = JspUtil.parseXMLDoc(in,
				  Constants.TAGLIB_DTD_RESOURCE,
				  Constants.TAGLIB_DTD_PUBLIC_ID);
	
        Vector tagVector = new Vector();
        NodeList list = tld.getElementsByTagName("taglib");

        if (list.getLength() != 1)
            throw new JasperException(Constants.getString("jsp.error.more.than.one.taglib"));

        Element elem = (Element) list.item(0);
        list = elem.getChildNodes();

        for(int i = 0; i < list.getLength(); i++) {
	    Node tmp = list.item(i);
	    if (! (tmp instanceof Element)) continue;
            Element e = (Element) tmp;
            String tname = e.getTagName();
            if (tname.equals("tlibversion")) {
                Text t = (Text) e.getFirstChild();
                if (t != null)
                    this.tlibversion = t.getData().trim();
            } else if (tname.equals("jspversion")) {
                Text t = (Text) e.getFirstChild();
                if (t != null)
                    this.jspversion = t.getData().trim();
            } else if (tname.equals("shortname")) {
                Text t = (Text) e.getFirstChild();
                if (t != null)
                    this.shortname = t.getData().trim();
            } else if (tname.equals("uri")) {
                Text t = (Text) e.getFirstChild();
                if (t != null)
                    this.urn = t.getData().trim();
            } else if (tname.equals("info")) {
                Text t = (Text) e.getFirstChild();
                if (t != null)
                    this.info = t.getData().trim();
            } else if (tname.equals("tag"))
                tagVector.addElement(createTagInfo(e));
            else
                Constants.message("jsp.warning.unknown.element.in.TLD", 
                                  new Object[] {
                                      e.getTagName()
                                  },
                                  Logger.WARNING
                                  );
        }

        this.tags = new TagInfo[tagVector.size()];
        tagVector.copyInto (this.tags);
    }

    private TagInfo createTagInfo(Element elem) throws JasperException {
        String name = null, tagclass = null, teiclass = null;
        String bodycontent = "JSP"; // Default body content is JSP
	String info = null;
        
        Vector attributeVector = new Vector();
        NodeList list = elem.getChildNodes();
        for(int i = 0; i < list.getLength(); i++) {
            Node tmp  =  list.item(i);
	    if (! (tmp instanceof Element)) continue;
	    Element e = (Element) tmp;
            String tname = e.getTagName();
            if (tname.equals("name")) {
                Text t = (Text) e.getFirstChild();
                if (t != null)
                    name = t.getData().trim();
            } else if (tname.equals("tagclass")) {
                Text t = (Text) e.getFirstChild();
                if (t != null)
                    tagclass = t.getData().trim();
            } else if (tname.equals("teiclass")) {
                Text t = (Text) e.getFirstChild();
                if (t != null)
                    teiclass = t.getData().trim();
            } else if (tname.equals("bodycontent")) {
                Text t = (Text) e.getFirstChild();
                if (t != null)
                    bodycontent = t.getData().trim();
            } else if (tname.equals("info")) {
                Text t = (Text) e.getFirstChild();
                if (t != null)
                    info = t.getData().trim();
            } else if (tname.equals("attribute"))
                attributeVector.addElement(createAttribute(e));
            else 
                Constants.message("jsp.warning.unknown.element.in.tag", 
                                  new Object[] {
                                      e.getTagName()
                                  },
                                  Logger.WARNING
                                  );
        }
	TagAttributeInfo[] tagAttributeInfo 
            = new TagAttributeInfo[attributeVector.size()];
	attributeVector.copyInto (tagAttributeInfo);

        TagExtraInfo tei = null;

        if (teiclass != null && !teiclass.equals(""))
            try {
                Class teiClass = ctxt.getClassLoader().loadClass(teiclass);
                tei = (TagExtraInfo) teiClass.newInstance();
	    } catch (ClassNotFoundException cex) {
                Constants.message("jsp.warning.teiclass.is.null",
                                  new Object[] {
                                      teiclass, cex.getMessage()
                                  },
                                  Logger.WARNING
                                  );
            } catch (IllegalAccessException iae) {
                Constants.message("jsp.warning.teiclass.is.null",
                                  new Object[] {
                                      teiclass, iae.getMessage()
                                  },
                                  Logger.WARNING
                                  );
            } catch (InstantiationException ie) {
                Constants.message("jsp.warning.teiclass.is.null",
                                  new Object[] {
                                      teiclass, ie.getMessage()
                                  },
                                  Logger.WARNING
                                  );
            }

        TagInfo taginfo = new TagInfo(name, tagclass, bodycontent,
                                      info, this, 
                                      tei,
                                      tagAttributeInfo);
        return taginfo;
    }

    TagAttributeInfo createAttribute(Element elem) {
        String name = null;
        boolean required = false, rtexprvalue = false, reqTime = false;
        String type = null;
        
        NodeList list = elem.getChildNodes();
        for(int i = 0; i < list.getLength(); i++) {
            Node tmp  = list.item(i);
	    if (! (tmp instanceof Element)) continue;
	    Element e = (Element) tmp;
            String tname = e.getTagName();
            if (tname.equals("name"))  {
                Text t = (Text) e.getFirstChild();
                if (t != null)
                    name = t.getData().trim();
            } else if (tname.equals("required"))  {
                Text t = (Text) e.getFirstChild();
                if (t != null) {
                    required = Boolean.valueOf(t.getData().trim()).booleanValue();
                    if( t.getData().equalsIgnoreCase("yes") )
                        required = true;
                }
            } else if (tname.equals("rtexprvalue")) {
                Text t = (Text) e.getFirstChild();
                if (t != null) {
                    rtexprvalue = Boolean.valueOf(t.getData().trim()).booleanValue();
                    if( t.getData().equalsIgnoreCase("yes") )
                        rtexprvalue = true;
                }
            } else if (tname.equals("type")) {
                Text t = (Text) e.getFirstChild();
                if (t != null)
                    type = t.getData().trim();
            } else 
                Constants.message("jsp.warning.unknown.element.in.attribute", 
                                  new Object[] {
                                      e.getTagName()
                                  },
                                  Logger.WARNING
                                  );
        }
        
	//     return new TagAttributeInfo(name, required, rtexprvalue, type);
        return new TagAttributeInfo(name, required, type, rtexprvalue);
    }

    static void copy(InputStream in, String fileName) 
        throws IOException, FileNotFoundException 
    {
        byte[] buf = new byte[1024];

        FileOutputStream out = new FileOutputStream(fileName);
        int nRead;
        while ((nRead = in.read(buf, 0, buf.length)) != -1)
            out.write(buf, 0, nRead);
    }

}