Documentbuilder and VerifyError
Hi,
I'm a beginner in programming java and xml. So i have maybe a simple question!
In my code, I get an VerifyError and I don't know how to handle this one! Can anybody help!? Thanks!!
public void create() {
try {
DocumentBuilderFactory factory =
DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
builder.setErrorHandler(handler);
document = builder.parse(xmlFile);
catch (FactoryConfigurationError e) {
// unable to get a document builder factory
catch (ParserConfigurationException e) {
// parser was unable to be configured
catch (SAXException e) {
// parsing error
catch (IOException e) {
// i/o error
java.lang.VerifyError: Cannot inherit from final class
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:502)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:250)
at java.net.URLClassLoader.access$100(URLClassLoader.java:54)
at java.net.URLClassLoader$1.run(URLClassLoader.java:193)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:186)
at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:265)
at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)
at org.apache.xerces.impl.XMLNSDocumentScannerImpl.createContentDispatcher(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.<init>(XMLDocumentFragmentScannerImpl.java:249)
at org.apache.xerces.impl.XMLDocumentScannerImpl.<init>(XMLDocumentScannerImpl.java:245)
at org.apache.xerces.impl.XMLNSDocumentScannerImpl.<init>(Unknown Source)
at org.apache.xerces.parsers.IntegratedParserConfiguration.createDocumentScanner(Unknown Source)
at org.apache.xerces.parsers.DTDConfiguration.<init>(DTDConfiguration.java:367)
at org.apache.xerces.parsers.StandardParserConfiguration.<init>(StandardParserConfiguration.java:198)
at org.apache.xerces.parsers.IntegratedParserConfiguration.<init>(Unknown Source)
at org.apache.xerces.parsers.IntegratedParserConfiguration.<init>(Unknown Source)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
at java.lang.Class.newInstance0(Class.java:306)
at java.lang.Class.newInstance(Class.java:259)
at org.apache.xerces.util.ObjectFactory.newInstance(ObjectFactory.java:266)
at org.apache.xerces.util.ObjectFactory.findJarServiceProvider(ObjectFactory.java:360)
at org.apache.xerces.util.ObjectFactory.createObject(ObjectFactory.java:185)
at org.apache.xerces.util.ObjectFactory.createObject(ObjectFactory.java:120)
at org.apache.xerces.parsers.DOMParser.<init>(Unknown Source)
at org.apache.xerces.parsers.DOMParser.<init>(Unknown Source)
at org.apache.xerces.jaxp.DocumentBuilderImpl.<init>(DocumentBuilderImpl.java:102)
at org.apache.xerces.jaxp.DocumentBuilderFactoryImpl.newDocumentBuilder(DocumentBuilderFactoryImpl.java:88)
at verwaltungsprog.xmlParser.Data_XML_Parser.create(Data_XML_Parser.java:49)
at verwaltungsprog.xmlParser.Data_XML_Parser.<init>(Data_XML_Parser.java:35)
at verwaltungsprog.xmlParser.Data_XML_Parser.main(Data_XML_Parser.java:132)
"replace xercesImpl.jar under %Tomcat_Home%/common/endorsed with the one included with Xalan-Java."
http://xml.apache.org/xalan-j/samples.html
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<?xml version="1.0" encoding="UTF-8"?><Signature XMLNS="http://www.w3.org/2000/09/xmldsig#"><SignedInfo><CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/><SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/><Reference URI="#CWRT"><DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><DigestValue>VWmTb6knCBXhNjDLp6w5aX79AW4=</DigestValue></Reference><Reference URI="js/weatherData.js"><DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><DigestValue>aRyqMcnVA7UsxHaq3VPjIzKnR30=</DigestValue></Reference><Reference URI="js/accuweather.js"><DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><DigestValue>NKBau43TGuOTSwOiFLtC7xgeUxk=</DigestValue></Reference><Reference URI="js/location.js"><DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><DigestValue>SNowBnKItayjP8hVg2a+qlrNnl4=</DigestValue></Reference><Reference URI="index.html"><DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><DigestValue>ImhqtDT/KgYLUMwhzBjxo7kX16c=</DigestValue></Reference><Reference URI="images/bg_fade_current.png"><DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><DigestValue>6YBFwLJdH7wLSLwgheOzTgLxe0g=</DigestValue></Reference><Reference URI="images/setdefault.png"><DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><DigestValue>VD9Ay9DjNvHoCt4QpWI6H5gHo84=</DigestValue></Reference><Reference URI="images/bg_portrait.png"><DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><DigestValue>eMNhpeowX/LaxFhZ0choyWoGdnU=</DigestValue></Reference><Reference URI="images/form_bg.png"><DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><DigestValue>xRsfhpWI8R21vXcPd73EJ0SPg4c=</DigestValue></Reference><Reference URI="images/nav_hourly_off.png"><DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><DigestValue>7tBjRZQ6PC5uVRg8J5bAFTmBS4s=</DigestValue></Reference><Reference URI="images/bg_landscape.png"><DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><DigestValue>nTZ9DoZPW1UgjEvE3WfSBt3DdYA=</DigestValue></Reference><Reference URI="images/nav_maps_off.png"><DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><DigestValue>ywLUlQ+DCMuybGr2YLYDQx85jJw=</DigestValue></Reference><Reference URI="images/nav_graph_off.png"><DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><DigestValue>853j9KcFEpuI5c8e5+0TEpmU33U=</DigestValue></Reference><Reference URI="images/label_forecast.png"><DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><DigestValue>2feKnZklWElbyqItqq5Q1bZRtn4=</DigestValue></Reference><Reference URI="images/bg_fade_content_wide.png"><DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><DigestValue>GDFP4Tcu96NBOCo9qRw7K25l8as=</DigestValue></Reference><Reference URI="images/btn_getlocation.png"><DigestMethod 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Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><DigestValue>BavTiifJ1XKhQx/AO4Y2PywHi+w=</DigestValue></Reference><Reference URI="images/wxicons/12.png"><DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><DigestValue>NNVCA+3eTGXWUXGjO1G4qoPPDaU=</DigestValue></Reference><Reference URI="images/wxicons/36.png"><DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><DigestValue>5Wy7pMJKjwc+fdL0+ez3OrhZ/WY=</DigestValue></Reference><Reference URI="images/wxicons/32.png"><DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><DigestValue>GrhBWg3ODd19NHkdaEyuzUDYGaQ=</DigestValue></Reference><Reference URI="images/wxicons/25.png"><DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><DigestValue>kVSt7ZBsrGBlnRp2mnNd4jzbjdc=</DigestValue></Reference><Reference URI="images/wxicons/29.png"><DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><DigestValue>CHkrsHgL9qFAKCgxQfGOaBgCg+A=</DigestValue></Reference><Reference 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// Instantiate the document to be validated
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
dbf.setNamespaceAware(true);
Document doc = db.parse(file);Your problem is that you've instantiated the DocumentBuilder before you've made the factory namespace aware. As a result, does not know against which namespace it is parsing the XML file.
Change the lines of code to have the factory be namespace-aware before you instantiate the DocumentBuilder and then parse the class. You'll get past your "node not found" error to receive a number of other errors which you need to correct.
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
Document doc = dbf.newDocumentBuilder().parse(file);As a practice when generating an XML document, you should try to validate it inside an IDE like Netbeans/Eclipse before trying to do anything with the document to ensure you've not only got a well-formed XML document, but also one that is "schema-conformant. Your XML signature is not (the Object element cannot come before the KeyInfo element, and the SignatureProperty element is missing the required Target attribute); as a result your Signature element will fail to pass validation even if your code is correct. A cursory review of the XML Signature specs and its XSD is always helpful: [http://www.w3.org/TR/xmldsig-core/].
Finally, please use the {code} tag for source-code to make it readable. Thanks.
Arshad Noor
StrongAuth, Inc. -
Implementing DOM Interface with existing Java classes
I had planned on using some tree-like Java classes as a Document Object Model, which would give me access to all sorts of XML and DOM tools like parsers and XSLT transformers. Initially, I thought all that would be neccessary is to implement all the DOM Interfaces in org.w3c.dom and then I would have a set of classes that conformed to DOM Level 1. It was my understanding that interfaces such as DOMImplementation and Document would interface with various XML tools, allowing creation of a class that implements Document and then Document would have its various factory methods that know how to create the various DOM nodes such as Element, Attr, Text, NamedNodeMap, NodeList, etc.
The problem I'm seeing now is that the JAXP specification (which is what the latest Xerces and Xalan tools conform to) has something called a DocumentBuilder and DocumentBuilderFactory that appear to be necessary to tell the framework what type of class to instantiate that implements the Document DOM interface. Those appear to have a lot of methods that deal with parsing of XML documents and I didn't really want to write or even subclass any existing Parsers in order to get the functionality of traversing and transforming a set of classes that implement the DOM interface.
Am I missing something here? Is it possible to plug in any (set of classes for) DOMImplementation and get them to work with the various DOM and XML tools out there?
Is there an easier way to allow parts of an application access to internal data structures but have the more generic tools or APIs, such as XSL transformers, access that same set of classes as a DOM with the generic DOM interface methods?
Can someone provide me with some guidance here? I'm in the process of finalizing some design on a system and need to know if this is possible or if I need to alter my design.
Thanks.If I understand you correctly, I think I am working on a similar issue. I am unhappy with the methods given by the DOM for retrieving data from the XML file and for building a file. Our software has a bunch of code that uses these classes and it is extremely ugly. My solution was to create a facade on top of the DOM model. Essentially I have some simple classes that store all the pertinent info (for me) about the XML structure. Essentially that is the element or attribute name, its values and in the case of the element, it's children. This makes it easier for me to build and retreive the data. What I then built was a loader class and a builder class. The loader takes an XML file and parses it in using the DOM classes and builds a structure using my classes and returns the root element. The builder takes a root element and creates a DOM object out of it. This frees me of having to code around the DOM classes all over the place and makes it simple to upgrade our XML code if the DOM changes or a better DOM is released. I am using factories to facilitate this and allow me to have loaders for specific types of XML documents so that I can have a class for each which further simplifies the XML related tasks of other developers on my team.
-
Exception using JAXP transformer on non-default DOM
Hi!
I have a problem with the JAXP integration of my own DOM implementation. I've written a compressed core level 1 DOM implementation and integrated it into JAXP by writing a DocumentBuilder and a DocumentBuilderFactory class. Although not 100% of all DOM methods are implemented completely, it works fine for typical xml documents. I can read in a xml document using JAXP by setting the DocumentBuilderFactory setting to my implementation:
System.setProperty("javax.xml.parsers.DocumentBuilderFactory", "ddom.jaxp.DDocumentBuilderFactory");
But if I try to use a Transformer on the document, I get a NoSuchMethodException:
Exception in thread "main" java.lang.NoSuchMethodError
at org.apache.xpath.DOM2Helper.getNamespaceOfNode(DOM2Helper.java:348)
at org.apache.xml.utils.TreeWalker.startNode(TreeWalker.java:281)
at org.apache.xml.utils.TreeWalker.traverse(TreeWalker.java:119)
at org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:320)
at ddom.DTreeTester.write(DTreeTester.java:59)
at ddom.DTreeTester.main(DTreeTester.java:76)
Unfortunately there is no source code available for JAXP, so I can't really figure what's going wrong. From the exception it is obvious that the Transformer is trying to figure out the namespace before it crashes. As my implementation ony implements DOM level 1 at the moment there is no support for namespaces. But of course this is reported by my DocumentBuilder class, so no calls to such methods hould occur.
I just wanted to use the identity transformation to produce some nice output files. I would be very happy if anyone could help me with this problem.
MathiasI tried to get more info on the DOM2Helper class, but only found lots of deprecated APIs. There seems to be some work done on internal APIs dealing with that class. Search for "DOM2Helper" in this page http://xml.apache.org/xalan-j/readme.html
Maybe you just need to get a newer version of Xalan. -
Hello all!
I'm developing a webapplication with JSP technology.
i have to manage xml files, change and rewrite them.
i use those pakage for manage and edit xml files :
"javax.xml.parsers.DocumentBuilder and DocumentBuilderFactory"
and that one for rewrite in a file:
"javax.xml.transform"
Now the problem is that the xml file edited had a particular element attribute order. the file rewrited change this order into an alphabetical order.
i want to mantein the previous order.
Is that possible? how?
Thanks!No you get over it. The spec doesn't say it, but it is clearly an oversight by engineers more concerned with computer consuming XML then humans. One of the big selling points is that it is human readable and editable, this goes right against that.
Now that XML is more of a standard, programming languages and other things are being generated using it. Configuration files and all sorts of things. Consider you have a tag like <function name="" comment="" >
Suppose comment becomes really long while name is very short. Right now XSLT will reverse these attributes..now comment comes before the name and the file becomes unreadable....XML is used by humans too!
The spec also doesn't say you need it or not. Java and the rest of the community have actively decided to be like you, a complete dick, for no reason and not support it. Just lazying coding for no reason. I guess maybe open standards are a bad way to go huh? Man up and have the right attitude...no reason not to make it an option other then total disregard for other peoples real world ( not virtual specification ) problems. -
How to store xml data fragments, that will not be queried?
Hello,
Delphi Client application communicates with Java Server application via XML messages. Client sends XML message over HTTP Post method. Java Servlet gets XML message, parses it, performs requested action (select/insert/update/delete), generates resulting response and sends it back to the Client.
I use Oracle DB XE 10.2.
For example: Client sends a request to the server, to append certain Order with new Product info:
Request:
<?xml version="1.0" encoding="UTF-8" ?>
- <Request OrderID="123123123" Action="NewProduct">
- <Product TempProdID="2" ProdName="L01" VisualID="1" Amount="1" TechClass="1" TechSubject="1" TechVersion="0" TechName="TestTech" ElemOk="0">
<Modified UserID="XXX" UserGroup="XXX" GroupLevel="0" />
- <QuickInfo>
<ProdIcon Format="PNG"
Encoding="Base64">iVBORw0KGgoAAAANSUhEUgAAAEAAAABACAIAAAA
lC+aJAAAAA3RSTlP////6yOLMAAAAvElEQVR42u3aQQ6EIAwAQP7/afe0
mo1mBVur0emJgwGmRDFNWwvH9I153OpjyoisefqXW3afm4WypP+MgomvT
z8AAAAAAAAAAAAAAMAzAClzAWQAdvexfqATEKmA/Fm0rYs5ozvoAWyWj4
ZqJ9efQKR8BJAHOPEdKAAc/lLdAhC/K68EBG+JWwAixfABgF8Jf6MAAAA
AAAAAAAAAAAAALwRUGgAAAAAAsgGJ3cfVrcfFl2jiIZzV+V7Zd/8BOtNi
0MnJ58oAAAAASUVORK5CYII=
</ProdIcon>
<Parameters />
</QuickInfo>
- <TechProduct CurVer="1" MinVer="1" TotalItems="330" ItemNodeSize="55074">
- <SubItem Class="TPlGraph" BindID="00B9C004">
<PropList />
- <SubItem Ident="Profiles" Class="TProfileList" Child="1" BindID="0188598C">
<PropList />
- <SubItem Class="TPlProfile" Child="1" BindID="018CA6CC">
- <PropList>
<Property PropIdent="ProfBaze0X" ValText="0" />
<Property PropIdent="ProfBaze0Y" ValText="990" />
<Property PropIdent="ProfBaze1X" ValText="990" />
<Property PropIdent="ProfHier0" ValText="0" />
- <Property PropIdent="InBorder" ValIdent="None" ValText="Nėra">
<ExtValue ColIdent="ItemCode" Value="None" />
<ExtValue ColIdent="Type" Value="" />
<ExtValue ColIdent="Filter" Value="" />
<ExtValue ColIdent="Width" Value="0" />
<ExtValue ColIdent="TechCall" Value="" />
</Property>
</PropList>
</SubItem>
</SubItem>
</SubItem>
</TechProduct>
</Product>
</Request>
I use DOM parsers to parse the received requests, extract certain info and insert it into relational tables using standart SQL queries.
My question is: what is the best way to store XML data fragments, that are not required to be saved relationally? I need to save the content of node <TechProduct> from the above example to relational table's column. There will be no need to query this column, no need to use relational views. I will use it only when Client application will request to modify certain order's product. Then I will have to send back the same <TechProduct> node via XML response.
So what column type do I have to use? CLOB? XMLType? Is it better to use object types? Do I have to register XML Schema for better performance? The size of the fragment can be ~2MB.
Thanks for your help
Message was edited by:
KichasThank you for reply,
As you suggested, I will use XMLType storage as CLOB (without XML Schema).
As I mentioned before, I use Java Servlet, deployed on Tomcat WebServer, to receive XML messages from Client application via HTTP POST method.
I use these libs to get the XML payload and parse it into a Document:
import org.w3c.dom.*;
import org.xml.sax.InputSource;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
And here is the code:
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
try {
// get the XML payload and parse it into a Document
DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();
Document dom;
InputSource input = new InputSource(request.getInputStream());
dom = docBuilder.parse(input);
catch(Exception ex) {
System.out.println("Exception thrown in XmlService");
ex.printStackTrace();
throw new ServletException(ex);
I create a relational table, that contains XMLType column:
CREATE TABLE xwarehouses (
warehouse_id NUMBER,
warehouse_spec XMLTYPE)
XMLTYPE warehouse_spec STORE AS CLOB;
Now I want to insert all DOM Document into XMLType column. So I do like this:
import oracle.xdb.XMLType;
String SQLTEXT = "INSERT INTO XWAREHOUSES (WAREHOUSE_ID, WAREHOUSE_SPEC) VALUES (?, ?)";
XMLType xml = XMLType.createXML(con,dom);
PreparedStatement sqlStatement = con.prepareStatement(SQLTEXT);
sqlStatement.setInt(1,2);
sqlStatement.setObject(2,xml);
sqlStatement.execute();
sqlStatement.close();
dom is the Document, that I got from HTTP Request input stream.
My servlet throws an exception:
java.lang.NoClassDefFoundError: oracle/xml/parser/v2/XMLParseException
at XmlService.GetMatListServiceHandler.processRequest(GetMatListServiceHandler.java:111)
at XmlService.XmlServiceHandler.handleRequest(XmlServiceHandler.java:43)
at XmlService.XmlServiceServlet.doPost(XmlServiceServlet.java:69)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:716)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
why does he needs oracle.xml.parser.v2.XMLParseException? I don't use Oracle parser? Does this code line throws the exception (I am not able to debug my code, because I have not configured JDeveloper to be able to use Remote Debuging):
XMLType xml = XMLType.createXML(con,dom);
Does it reparses the given dom Document or what?. When I deploy xmlparserv2.jar to Tomcat, everything is ok, application inserts XML data into XMLType column.
Is there another way to insert the whole org.w3c.dom Document or Document fragment (that is already parsed) into XMLType column. Can you provide any sample code?
The Document may contain national symbols, so they should be correctly stored and then later retrieved.
Many thanks. -
Hello guys,
I am just wondering if i can write to a text file in xml format:
For example if i want to save the following:
Avisha 00/06/2000
The text file should show:
<record>
<name>Avisha</name>
<DOB00/06/200</DOB>
</record>
I think i probably needs to use some sort of XML schema, i never done it before and i would appriciate your help.
Thanks,corlettk wrote:
thomas.behr wrote:
Well, for simple cases, such as your example, just create an appropriate String and write that to your file.
For more complex cases, create a org.w3c.dom.Document (using DocumentBuilder and DocumentBuilderFactory), create the appropriate structure and use a javax.xml.transform.Transformer (created via TransformerFactory) to convert your Document from a DOMSource to StreamResult.I'm not a fan of the DOM solution... It's slow and very memory hungry... Goog for small datasets.
@OP If you can, I recommend using an XMLBinder (like [XML-Beans|http://xmlbeans.apache.org/] jusr for example) to both read and write all your XML.Errr, XMLBeans and the like will still be using DOM under the covers, so the memory issue is still as relevant as before. Happily, this turns out to be "not as much as you probably think" anyway. So the decision is a design one. Do you have schemas for this XML? You don't? Ah well, a binding framework's out of the question anyway. What are you doing with it? ("Processing it" isn't an answer). Where is it coming from? ("my codez" isn't an answer). What format need it be in? ("XML format" isn't an answer)
Building a DOM tree and serializing it isn't necessarily all that stupid an idea -
I know this should not be difficult, but I cannot really find an easy answer to validating an XML document against a schema. I have an XML document that I can validate against a schema within Netbeans. I want to write some Java code that will validate the XML document against the schema at runtime before I start reading the data. Can someone provide me with a simple straightforward answer? Does the XML document have to have the "xsi:schemaLocation" or can I define that at code time?
I am currently using the DocumentBuilderFactory, DocumentBuilder, and Document to load the XML into a DOM document so that I can read the data.
Thankshttp://forum.java.sun.com/thread.jsp?forum=34&thread=288059
-
How to parse an PL/SQL type to XML format in ORACLE8
I've got a PL/SQL type ( table/records/...) and I want to set it to XML format :
I've got
TYPE return_row IS record (
value_1 NUMBER(2),
value_2 VARCHAR2(30));
TYPE return_test IS TABLE OF return_row
INDEX BY BINARY_INTEGER;
VARCHAR2 XMLformat;
And I want to set into XMLformat the value of return_test parsed to XML.I only
need to know how to change a inputstream (instance of
an online xml file) to a Node. If your want to create a Node, maybe you're thinking DOM (as apposed to SAX) and you should take a look at the API for:
- DocumentBuilderFactory
- DocumentBuilder
and the
Document parse(...)
method family. They all return a Document, which is a type of Node. -
I thought I understood XML ........
Hi, Can anyone help me out here. Although I understand about XML and have written al lot of stuff to process XML, it was in a language that came out of a company based in Redmond :).
I take one look at the Java stuff and get very confused.
I want to export the Preferences of an application to a file, which using is easily done using the standard package and this produces a "stream". Before I send the contents to a file I want to delete some of the nodes in the preferences as they are specific to that instance of the application. I would therefore like to edit the XML before it is written. I would normally make a XML Document object from the XML in the stream and make my changes to that, finally sending the content of the document to a file. Easy enough I thinks, and it is in the other language.
In java I try to make a document with a DocumentBuilderFactory and DocumentBuilder and when I try to run the program I get an UnknownHostException because the computer involved cannot connect to the internet and download the DTD specified in the XML Stream. The offending line is part of the exported XML cannot be remove as I will also want it in the final output for when it is imported again.
I have seen all sorts of articles about different packages, parsers and the like and I am now totally confused. I did try making a custom entity resolver but that didnt work either. I tried to use the SAX parser but could not work out how to make that give me a document.I'm not even sure this is the right thing to do.
Can someone point me to where this might be explained in simple terms because I really am totally confused now.
Thanks
TerryOk first, sorry if I was appearing to "have a sly go" at Java, I was actually trying to infer that it was my lack of knowledge and inability to get my head around this rather than anything "wrong" with java. I spent 15 years learning the other stuff and so if I didn't understand that side of things then I should have given up and become a road sweeper. I've only spent 3 months on this in a serious way.
Anyway that said I am still confused by all the different parsers and things and there are lots of examples out there but none I have found really explain why I would want to use a particular parser or what I can do with them etc.
Ok back to my original problem, this is the code and its just a little piece of prototype so please ignore any redundant imports or improper exception handling and that sort of error,
* To change this template, choose Tools | Templates
* and open the template in the editor.
package xxxx.xxxxxxx.xxxx.xxx;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.prefs.BackingStoreException;
import java.util.prefs.Preferences;
import javax.xml.parsers.ParserConfigurationException;
import org.xml.sax.SAXException;
public class GlobalData {
private Preferences prefs;
public void setPreference() throws SAXException, ParserConfigurationException, IOException {
prefs = Preferences.systemNodeForPackage(GlobalData.class);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
//OutputStream out = System.out;
try {
// prefs.exportSubtree(out);
prefs.exportSubtree(baos);
} catch (IOException ex) {
Logger.getLogger(GlobalData.class.getName()).log(Level.SEVERE, null, ex);
} catch (BackingStoreException ex) {
Logger.getLogger(GlobalData.class.getName()).log(Level.SEVERE, null, ex);
ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setValidating(false);
DocumentBuilder builder = factory.newDocumentBuilder();
EntityResolver customEntityResolver = new DummyEntityResolver();
builder.setEntityResolver(customEntityResolver);
Document xDoc = builder.parse(bais);
//System.out.println(xDoc.toString());
public static void main(String[] args) {
GlobalData test = new GlobalData();
try {
test.setPreference();
} catch (ParserConfigurationException ex) {
Logger.getLogger(GlobalData.class.getName()).log(Level.SEVERE, null, ex);
} catch (SAXException ex) {
Logger.getLogger(GlobalData.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(GlobalData.class.getName()).log(Level.SEVERE, null, ex);
public class DummyEntityResolver implements EntityResolver{
public InputSource resolveEntity(String publicId, String systemId) throws SAXException, IOException {
return null;
}I thought I got it right but obviously not.
When it hits the parse then I get the UnknownHostException just the same as without the custom EntityResolver.
If you can help I would be grateful.
Thanks
Terry
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