Error Unable To Instantiate Parser Dom.wrappers.xerces
RE: dom.Counter (parser doesnt instantiates) Date Thu, 26 Jun 2003 22:42:02 GMT I am extremely sorry for bothering you guys again and again, but unfortunately my DOm Sample Counter.java still does not run. I tried to to run it with the following command but it produces errror: java -cp ".:~/xerces-2_4_0/build/xercesImpl.jar:~/xerces-2_4_0/build/xml-apis.jar" dom.Counter ~/xerces-2_4_0/data/personal.xml error: Unable to instantiate parser (dom.wrappers.Xerces). I also tried adding xercesSamles.jar and /build/src to class path but it still gives the above error. I do not have Xerces.class. I tried to compile Xerces.java by giving all kind of classpath options including build/src and some jar files as following: % javac -classpath .:~/xerces-2_4_0/build/xercesImpl.jar:~/xerces-2_4_0/build/xml-apis.jar:~/xerces-2_4_0/build/src dom/wrappers/Xerces.java But it always generates the following errors: dom/wrappers/Xerces.java:62: package org.apache.xerces.dom does not exist import org.apache.xerces.dom.TextImpl; ^ dom/wrappers/Xerces.java:63: package org.apache.xerces.parsers does not exist import org.apache.xerces.parsers.DOMParser; I do not understand what I am doign wrong. I would be very gratefull for help in this mattter. Thank you very much. Fatima >From: "Christopher Ebert"
is not working for me No replies Display:ConversationsBy Date 1-1 of 1 Previous Next SystemAdmin 110000D4XK 1138 Posts Pinned topic DOM Tutorial is not working for http://mail-archives.apache.org/mod_mbox/xerces-j-users/200306.mbox/%3CLaw11-F79PC5mNQz6Qz0000b242@hotmail.com%3E me 2007-12-13T16:21:11Z | Tags: Answered question This question has been answered. Unanswered question This question has not been answered yet. Hi all - this is my first post, https://www.ibm.com/developerworks/community/forums/html/topic?id=77777777-0000-0000-0000-000014025331&ps=100 so be gentle. I am trying to run one of the tutorials that comes with Xerces: http://xerces.apache.org/xerces-j/samples.html Specifically, the first one (DOM Count). I loaded two files: Counter.java and ParserWrapper.java into my Eclipse. It builds fine, but when I try to run it (with an XML file as argument), I get this error message: error: Unable to instantiate parser (dom.wrappers.Xerces) What am I doing wrong? -Ramon Log in to reply. Show: 10 25 50 100 items per page Previous Next Feed for this topic
valid initial URL, the spider controller should report: The URL of any page that is accessible from the initial URL through a series of links to valid HTML 4.0 pages on the same host, but is not itself a valid HTML http://cobweb.cs.uga.edu/~dme/csx76/Assignments/Assn2_S03.html 4.0 page ("invalid page"); The HREF property of any link on any page that is https://github.com/talklittle/xml2lua/blob/master/libs-src-xerces/dom/GetElementsByTagName.java accessible from the initial URL through a series of links to valid HTML 4.0 pages on the same host, if that link does not connect to a Web page ("bad link"). Note that a bad link is a hyperlink element in a page on the same host as the original URL, but the target of the link does not have to be error unable on the same host. In other words, the spider checks both internal links within the Web site, and external links which go off the site. Multithreading requirement: your spider program must use the following concurrent graph traversal scheme. When a Spider discovers N links in a web page, each of which connects to another Web page on the same host, it creates N new Spiders which run concurrently and each examine one of the linked web pages. error unable to Display and status reporting: the spider controller should print a message in the display area of its controlling Testbed whenever an invalid page or bad link is discovered. Of course, this message should display the URL of the invalid page or the target of the bad link. Also, the status message should display a count of the number of currently active spiders, which is updated whenever a spider is created or destroyed. Java implementation notes Here is a rundown on the Java classes that you should use for various functional subtasks of this problem. Part of the assignment is reading the Java API documentation for the new classes you will use. (Note: docs for the Xerces parser classes are not found on the above site; see the links below) SubtaskJava class Establish connection to URL and get contents URL, HttpUrlConnection Detect whether a linked URL is on the same host as the current URL URL Create multiple concurrent spiders Thread Parse HTML to find links Xerces classes Keep track of which pages have already been visited Set interface Here is a sample HTML parser program written by Jeffrey Rodriguez and Andy Clark of IBM, with some code added by me to illustrate the construction of a new URL from an embedded link element. The Java souce files and jar files needed to compile and run this example can be
Sign in Pricing Blog Support Search GitHub This repository Watch 2 Star 1 Fork 0 talklittle/xml2lua Code Issues 0 Pull requests 0 Projects 0 Pulse Graphs Permalink Branch: master Switch branches/tags Branches Tags master Nothing to show Nothing to show Find file Copy path xml2lua/libs-src-xerces/dom/GetElementsByTagName.java Fetching contributors… Cannot retrieve contributors at this time Raw Blame History 492 lines (429 sloc) 20 KB /* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package dom; import java.io.PrintWriter; import org.w3c.dom.Attr; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.NamedNodeMap; import org.w3c.dom.NodeList; import org.xml.sax.SAXException; import org.xml.sax.SAXParseException; /** * A sample DOM filter. This sample program illustrates how to * use the Document#getElementsByTagName() method to quickly * and easily locate elements by name. * * @author Jeffrey Rodriguez, IBM * @author Andy Clark, IBM * * @version $Id: GetElementsByTagName.java 447683 2006-09-19 02:36:31Z mrglavas $ */ public class GetElementsByTagName { // // Constants // // feature ids /** Namespaces feature id (http://xml.org/sax/features/namespaces). */ protected static final String NAMESPACES_FEATURE_ID = "http://xml.org/sax/features/namespaces"; /** Validation feature id (http://xml.org/sax/features/validation). */ protected static final String VALIDATION_FEATURE_ID = "http://xml.org/sax/features/validation"; /** Schema validation feature id (http://apache.org/xml/features/validation/schema). */ protected static final String SCHEMA_VALIDATION_FEATURE_ID = "http://apache.org/xml/features/validation/schema"; /** Schema full checking feature id (http://apache.org/xml/features/validation/schema-full-checking).