I am newbie in edi data. I am using smooks api to read the edi data and able to parse it into java object. I want to convert java object to edi data for that i am not getting much information. Here is the example i am trying to read from edi file and creating the java object -
customOrder.edi - COR*130*PINGPONG02*You got it to work*1230
---------------
POJO -
------
public class CustomOrder implements Serializable{
private int number;
private String sender;
private String message;
private int price;
// setter and getter
}
custom-order-mapping.xml -
-------------------------
<?xml version="1.0" encoding="UTF-8"?><medi:edimap xmlns:medi="http://www.milyn.org/schema/edi-message-mapping-1.3.xsd">
<medi:description name="DVD Order" version="1.0" />
<medi:delimiters segment="
" field="*" component="^" sub-component="~" />
<medi:segments xmltag="CustomOrder">
<medi:segment segcode="COR" xmltag="co">
<medi:field xmltag="number" />
<medi:field xmltag="sender" />
<medi:field xmltag="message" />
<medi:field xmltag="price" />
</medi:segment>
</medi:segments>
</medi:edimap>
smooks-config.xml -
------------------
<?xml version="1.0"?>
<smooks-resource-list
xmlns="http://www.milyn.org/xsd/smooks-1.1.xsd"
xmlns:edi="http://www.milyn.org/xsd/smooks/edi-1.1.xsd"
xmlns:jb="http://www.milyn.org/xsd/smooks/javabean-1.2.xsd"
xmlns:core="http://www.milyn.org/xsd/smooks/smooks-core-1.4.xsd">
<edi:reader mappingModel="/example/custom-order-mapping.xml" />
<jb:bean beanId="customer" class="example.model.CustomOrder" createOnElement="co">
<!-- Customer bindings... -->
<jb:value property="number" data="#/number" decoder="Integer"/>
<jb:value property="sender" data="#/sender" decoder="String"/>
<jb:value property="message" data="#/message" decoder="String"/>
<jb:value property="price" data="#/price" decoder="Integer"/>
</jb:bean>
</smooks-resource-list>
Main method -
--------------
Main smooksMain = new Main();
ExecutionContext executionContext = smooksMain.smooks.createExecutionContext();
org.milyn.payload.JavaResult result = smooksMain.runSmooksTransform(executionContext);
CustomOrder custOrder = (CustomOrder) result.getBean("customer");
// Need to get to edi data from java object custOrder
// Please help me - this part of code
I want to prepare edi data from java object. If any other api/framework apart from Smooks which will do the same, it will be fine for me.please let me know, Thanks.
I searched about it and get to know from smooks forum that to prepare edi data from java object, we have to use Edifact Java Compiler(EJC).
Above example is to prepare java object from edi data.
Pojo class have to implement EDIWritable and override the write method.Here is the changed Pojo class -
public class CustomOrder implements Serializable, EDIWritable{
private int number;
private IntegerDecoder numberDecoder;
private String sender;
private String message;
private int price;
private IntegerDecoder priceDecoder;
public CustomOrder() {
numberDecoder = new IntegerDecoder();
priceDecoder = new IntegerDecoder();
}
public int getNumber() {
return number;
}
public void setNumber(int number) {
this.number = number;
}
public void setSender(String sender) {
this.sender = sender;
}
public String getSender() {
return sender;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public int getPrice() {
return price;
}
public void setPrice(int price) {
this.price = price;
}
public void write(Writer writer, Delimiters delimiters) throws IOException {
// TODO Auto-generated method stub
Writer nodeWriter = writer;
if(number != 0) {
nodeWriter.write(delimiters.escape(numberDecoder.encode(number)));
}
nodeWriter.write(delimiters.getField());
if(sender != null) {
nodeWriter.write(delimiters.escape(sender.toString()));
}
nodeWriter.write(delimiters.getField());
if(message != null) {
nodeWriter.write(delimiters.escape(message.toString()));
}
nodeWriter.write(delimiters.getField());
if(price != 0) {
nodeWriter.write(delimiters.escape(priceDecoder.encode(price)));
}
//nodeWriter.write(delimiters.getField());
writer.write(delimiters.getSegmentDelimiter());
writer.flush();
}
}
Next, we have to prepare the Factory of the pojo class -
CustomOrderFactory
public class CustomOrderFactory {
private Smooks smooks;
private Delimiters delimiters;
public static CustomOrderFactory getInstance() throws IOException, SAXException {
return new CustomOrderFactory();
}
public void addConfigurations(InputStream resourceConfigStream) throws SAXException, IOException {
smooks.addConfigurations(resourceConfigStream);
}
public void toEDI(CustomOrder instance, Writer writer) throws IOException {
instance.write(writer, delimiters);
}
private CustomOrderFactory() throws IOException, SAXException {
smooks = new Smooks(CustomOrderFactory.class.getResourceAsStream("smooks-config.xml"));
System.out.println("smooks is prepared");
try {
Edimap edimap = EDIConfigDigester.digestConfig(CustomOrderFactory.class.getResourceAsStream("custom-order-mapping.xml"));
System.out.println("ediMap is prepared");
delimiters = edimap.getDelimiters();
System.out.println("delimeter is prepared");
} catch(EDIConfigurationException e) {
IOException ioException = new IOException("Exception reading EDI Mapping model.");
ioException.initCause(e);
throw ioException;
}
}
}
Once CustomOrder object is ready, as shown above in Main class. We have to use this object to convert to edi data format. Here is the complete Main class -
Main class
----------
Main smooksMain = new Main();
ExecutionContext executionContext = smooksMain.smooks.createExecutionContext();
org.milyn.payload.JavaResult result = smooksMain.runSmooksTransform(executionContext);
CustomOrder custOrder = (CustomOrder) result.getBean("customer");
// Prepare edi data from java object custOrder
CustomOrderFactory customOrderFactory = CustomOrderFactory.getInstance();
OutputStream os = new FileOutputStream("createdEDIFile.edi");
customOrderFactory.toEDI(custOrder, new OutputStreamWriter(os));
System.out.println("Edi file is created from java object");
Thats it. Hope it would help. Thanks.
Related
I have two applications communicating with each other using rabbit.
I need to send (from app1) an object to a listener (in app2) and after some process (on listener) it answer me with another object, now I am receiving this error:
ClassNotFound
I am using this config for rabbit in both applications:
#Configuration
public class RabbitConfiguration {
public final static String EXCHANGE_NAME = "paymentExchange";
public final static String EVENT_ROUTING_KEY = "eventRoute";
public final static String PAYEMNT_ROUTING_KEY = "paymentRoute";
public final static String QUEUE_EVENT = EXCHANGE_NAME + "." + "event";
public final static String QUEUE_PAYMENT = EXCHANGE_NAME + "." + "payment";
public final static String QUEUE_CAPTURE = EXCHANGE_NAME + "." + "capture";
#Bean
public List<Declarable> ds() {
return queues(QUEUE_EVENT, QUEUE_PAYMENT);
}
#Autowired
private ConnectionFactory rabbitConnectionFactory;
#Bean
public AmqpAdmin amqpAdmin() {
return new RabbitAdmin(rabbitConnectionFactory);
}
#Bean
public DirectExchange exchange() {
return new DirectExchange(EXCHANGE_NAME);
}
#Bean
public RabbitTemplate rabbitTemplate() {
RabbitTemplate r = new RabbitTemplate(rabbitConnectionFactory);
r.setExchange(EXCHANGE_NAME);
r.setChannelTransacted(false);
r.setConnectionFactory(rabbitConnectionFactory);
r.setMessageConverter(jsonMessageConverter());
return r;
}
#Bean
public MessageConverter jsonMessageConverter() {
return new Jackson2JsonMessageConverter();
}
private List<Declarable> queues(String... nomes) {
List<Declarable> result = new ArrayList<>();
for (int i = 0; i < nomes.length; i++) {
result.add(newQueue(nomes[i]));
if (nomes[i].equals(QUEUE_EVENT))
result.add(makeBindingToQueue(nomes[i], EVENT_ROUTING_KEY));
else
result.add(makeBindingToQueue(nomes[i], PAYEMNT_ROUTING_KEY));
}
return result;
}
private static Binding makeBindingToQueue(String queueName, String route) {
return new Binding(queueName, DestinationType.QUEUE, EXCHANGE_NAME, route, null);
}
private static Queue newQueue(String nome) {
return new Queue(nome);
}
}
I send the message using this:
String response = (String) rabbitTemplate.convertSendAndReceive(RabbitConfiguration.EXCHANGE_NAME,
RabbitConfiguration.PAYEMNT_ROUTING_KEY, domainEvent);
And await for a response using a cast to the object.
This communication is between two different applications using the same rabbit server.
How can I solve this?
I expected rabbit convert the message to a json in the send operation and the same in the reply, so I've created the object to correspond to a json of reply.
Show, please, the configuration for the listener. You should be sure that ListenerContainer there is supplied with the Jackson2JsonMessageConverter as well to carry __TypeId__ header back with the reply.
Also see Spring AMQP JSON sample for some help.
I have an external dll written in C# and I studied from the assemblies documentation that it writes its debug messages to the Console using Console.WriteLine.
this DLL writes to console during my interaction with the UI of the Application, so i don't make DLL calls directly, but i would capture all console output , so i think i got to intialize in form load , then get that captured text later.
I would like to redirect all the output to a string variable.
I tried Console.SetOut, but its use to redirect to string is not easy.
As it seems like you want to catch the Console output in realtime, I figured out that you might create your own TextWriter implementation that fires an event whenever a Write or WriteLine happens on the Console.
The writer looks like this:
public class ConsoleWriterEventArgs : EventArgs
{
public string Value { get; private set; }
public ConsoleWriterEventArgs(string value)
{
Value = value;
}
}
public class ConsoleWriter : TextWriter
{
public override Encoding Encoding { get { return Encoding.UTF8; } }
public override void Write(string value)
{
if (WriteEvent != null) WriteEvent(this, new ConsoleWriterEventArgs(value));
base.Write(value);
}
public override void WriteLine(string value)
{
if (WriteLineEvent != null) WriteLineEvent(this, new ConsoleWriterEventArgs(value));
base.WriteLine(value);
}
public event EventHandler<ConsoleWriterEventArgs> WriteEvent;
public event EventHandler<ConsoleWriterEventArgs> WriteLineEvent;
}
If it's a WinForm app, you can setup the writer and consume its events in the Program.cs like this:
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
using (var consoleWriter = new ConsoleWriter())
{
consoleWriter.WriteEvent += consoleWriter_WriteEvent;
consoleWriter.WriteLineEvent += consoleWriter_WriteLineEvent;
Console.SetOut(consoleWriter);
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
}
static void consoleWriter_WriteLineEvent(object sender, Program.ConsoleWriterEventArgs e)
{
MessageBox.Show(e.Value, "WriteLine");
}
static void consoleWriter_WriteEvent(object sender, Program.ConsoleWriterEventArgs e)
{
MessageBox.Show(e.Value, "Write");
}
It basically amounts to the following:
var originalConsoleOut = Console.Out; // preserve the original stream
using(var writer = new StringWriter())
{
Console.SetOut(writer);
Console.WriteLine("some stuff"); // or make your DLL calls :)
writer.Flush(); // when you're done, make sure everything is written out
var myString = writer.GetStringBuilder().ToString();
}
Console.SetOut(originalConsoleOut); // restore Console.Out
So in your case you'd set this up before making calls to your third-party DLL.
You can also call SetOut with Console.OpenStandardOutput, this will restore the original output stream:
Console.SetOut(new StreamWriter(Console.OpenStandardOutput()));
Or you can wrap it up in a helper method that takes some code as an argument run it and returns the string that was printed. Notice how we gracefully handle exceptions.
public string RunCodeReturnConsoleOut(Action code)
{
string result;
var originalConsoleOut = Console.Out;
try
{
using (var writer = new StringWriter())
{
Console.SetOut(writer);
code();
writer.Flush();
result = writer.GetStringBuilder().ToString();
}
return result;
}
finally
{
Console.SetOut(originalConsoleOut);
}
}
Using solutions proposed by #Adam Lear and #Carlo V. Dango I created a helper class:
public sealed class RedirectConsole : IDisposable
{
private readonly Action<string> logFunction;
private readonly TextWriter oldOut = Console.Out;
private readonly StringWriter sw = new StringWriter();
public RedirectConsole(Action<string> logFunction)
{
this.logFunction = logFunction;
Console.SetOut(sw);
}
public void Dispose()
{
Console.SetOut(oldOut);
sw.Flush();
logFunction(sw.ToString());
sw.Dispose();
}
}
which can be used in the following way:
public static void MyWrite(string str)
{
// print console output to Log/Socket/File
}
public static void Main()
{
using(var r = new RedirectConsole(MyWrite)) {
Console.WriteLine("Message 1");
Console.WriteLine("Message 2");
}
// After the using section is finished,
// MyWrite will be called once with a string containing all messages,
// which has been written during the using section,
// separated by new line characters
}
Anyone knows how to develop an add-in for PowerDesigner? I was reading the document of PowerDesigner about how to create an ActiveX Add-in, it says "The ActiveX must implement a specific interface called IPDAddIn to become a PowerDesigner add-in.". But I don't know where the interface IPDAddIn is, and how to implement it ?
Here is the online document
I have this old example, which could give some ideas, even if not everything it up-to-date.
using PdAddInTypLib;
namespace MineSpace
{
[ComVisible(true)]
[Guid("A6FA0D26-77E8-4DD3-B27E-F4050C3D5188")]
public class Launcher : IPdAddIn {
// Main() manages the console or GUI interface
// the PdAddIn interface is managed by an instance of Launcher
[ComVisible(false)]
[STAThread]
public static void Main(String[] args) {
}
public Launcher() {
_app = null;
}
// IPdAddIn implementation
public void Initialize(Object anApplication) {
try {
_app = (PdCommon.Application)anApplication;
}
catch (Exception e) {
// process
}
}
public void Uninitialize() {
}
public String ProvideMenuItems(String aMenu, Object anObj) {
return "";
}
public int IsCommandSupported(String aMenu, Object anObj, String aCommand) {
return 0;
}
public void DoCommand(String aMenu, Object anObj, String aCommand) {
}
private PdCommon.Application _app;
}
}
with the corresponding part in the class declaration:
[HKEY_CLASSES_ROOT\MyPlugin.Launcher]
#="MyPlugin.Launcher"
[HKEY_CLASSES_ROOT\MyPlugin.Launcher\CLSID]
#="{13749EFC-1ADA-4451-8C47-FF0B545FF172}"
[HKEY_CLASSES_ROOT\CLSID\{13749EFC-1ADA-4451-8C47-FF0B545FF172}]
#="MyPlugin.Launcher"
[HKEY_CLASSES_ROOT\CLSID\{13749EFC-1ADA-4451-8C47-FF0B545FF172}\InprocServer32]
#="C:\windows\System32\mscoree.dll"
"ThreadingModel"="Both"
"Class"="MyPlugin.Launcher"
"Assembly"="MyPlugin, Version=1.0.1402.33688, Culture=neutral, PublicKeyToken=null"
"RuntimeVersion"="v1.0.3705"
[HKEY_CLASSES_ROOT\CLSID\{13749EFC-1ADA-4451-8C47-FF0B545FF172}\ProgId]
#="MyPlugin.Launcher"
[HKEY_CLASSES_ROOT\CLSID\{13749EFC-1ADA-4451-8C47-FF0B545FF172}\Implemented Categories\{62C8FE65-4EBB-45E7-B440-6E39B2CDBF29}]
And the corresponding code to declare the add-in in PowerDesigner. If the File value is present, PowerDesigner could call DllRegisterServer on it, if the component is not yet registered.
[HKEY_LOCAL_MACHINE\SOFTWARE\Sybase\PowerDesigner 10\Addins\MyPlugin Launcher]
"Enable"="No"
"Class"="MyPlugin.Launcher"
"Type"="ActiveX"
"File"="d:\\myplugin\\myplugin.exe"
I am trying to write my own protocol handler for a JavaFX application that uses webview to access a single website. What I have done so far
My custom URLStreamHandlerFactory
public class MyURLStreamHandlerFactory implements URLStreamHandlerFactory {
public URLStreamHandler createURLStreamHandler(String protocol) {
System.out.println("Protocol: " + protocol);
if (protocol.equalsIgnoreCase("http") || protocol.equalsIgnoreCase("https")) {
return new MyURLStreamHandler();
} else {
return new URLStreamHandler() {
#Override
protected URLConnection openConnection(URL u) throws IOException {
return new URLConnection(u) {
#Override
public void connect() throws IOException {
}
};
}
};
}
}
}
My custom URLStreamHandler
public class MyURLStreamHandler extends java.net.URLStreamHandler{
protected HttpURLConnection openConnection(URL u){
MyURLConnection q = new MyURLConnection(u);
return q;
}
}
My custom HttpURLConnection
public class MyURLConnection extends HttpURLConnection {
static int defaultPort = 443;
InputStream in;
OutputStream out;
Socket s;
publicMyURLConnection(URL url) {
super(url);
try {
setRequestMethod("POST");
} catch (ProtocolException ex) {
ex.printStackTrace();
}
}
public void setRequestProperty(String name, String value){
super.setRequestProperty(name, value);
System.out.println("Namee: " + name);
System.out.println("Value: " + value);
}
public String getRequestProperty(String name){
System.out.println("GET REQUEST: ");
return super.getRequestProperty(name);
}
public OutputStream getOutputStream() throws IOException {
OutputStream os = super.getOutputStream();
System.out.println("Output: " + os);
return os;
}
public InputStream getInputStream() throws IOException {
InputStream is = super.getInputStream();
System.out.println("INout stream: " + is);
return is;
}
#Override
public void connect() throws IOException {
}
#Override
public void disconnect() {
throw new UnsupportedOperationException("Not supported yet.");
}
#Override
public boolean usingProxy() {
throw new UnsupportedOperationException("Not supported yet.");
}
When I run the application I get the following error althouhg it seems to set some headers
Jul 08, 2013 11:09:04 AM com.sun.webpane.webkit.network.URLLoader doRun
WARNING: Unexpected error
java.net.UnknownServiceException: protocol doesn't support input
at java.net.URLConnection.getInputStream(URLConnection.java:839)
at qmed.QMedURLConnection.getInputStream(MyURLConnection.java:67)
at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:468)
at com.sun.webpane.webkit.network.URLLoader.receiveResponse(URLLoader.java:383)
at com.sun.webpane.webkit.network.URLLoader.doRun(URLLoader.java:142)
at com.sun.webpane.webkit.network.URLLoader.access$000(URLLoader.java:44)
at com.sun.webpane.webkit.network.URLLoader$1.run(URLLoader.java:106)
at com.sun.webpane.webkit.network.URLLoader$1.run(URLLoader.java:103)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.webpane.webkit.network.URLLoader.run(URLLoader.java:103)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)
All I want to do is get the response back for a given request and reads its binary data. I want the protocol to behave exactly the same way as the default one and only check the binary data of a given respone. What am I doing wrong?
The application is doing all shorts of URLConnections. Is it correct to use a HTTPURLConnection as my custom URLConnection class when the protocol is http or https and start a default URLStreamHandler when other protocols are used like I am doing in MyURLStreamHandlerFactory? Should I just extend the default URLConnection class in MYURLConnection to handle all protocols the same?
Any help would be much appreciated as this is a project threatening problem
Thank you
It might be that all you are missing is a setDoInput(true) or override getDoInput() and return true (that's what i did).
If that does not help check out my working solution:
MyURLStreamHandlerFactory:
import java.net.URLStreamHandler;
import java.net.URLStreamHandlerFactory;
public class MyURLStreamHandlerFactory implements URLStreamHandlerFactory
{
public URLStreamHandler createURLStreamHandler(String protocol)
{
if (protocol.equals("myapp"))
{
return new MyURLHandler();
}
return null;
}
}
Register Factory:
URL.setURLStreamHandlerFactory(new MyURLStreamHandlerFactory());
MyURLHandler :
import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLStreamHandler;
public class MyURLHandler extends URLStreamHandler
{
#Override
protected URLConnection openConnection(URL url) throws IOException
{
return new MyURLConnection(url);
}
}
MyURLConnection:
import java.io.*;
import java.net.SocketTimeoutException;
import java.net.URL;
import java.net.URLConnection;
/**
* Register a protocol handler for URLs like this: <code>myapp:///pics/sland.gif</code><br>
*/
public class MyURLConnection extends URLConnection
{
private byte[] data;
#Override
public void connect() throws IOException
{
if (connected)
{
return;
}
loadImage();
connected = true;
}
public String getHeaderField(String name)
{
if ("Content-Type".equalsIgnoreCase(name))
{
return getContentType();
}
else if ("Content-Length".equalsIgnoreCase(name))
{
return "" + getContentLength();
}
return null;
}
public String getContentType()
{
String fileName = getURL().getFile();
String ext = fileName.substring(fileName.lastIndexOf('.'));
return "image/" + ext; // TODO: switch based on file-type
}
public int getContentLength()
{
return data.length;
}
public long getContentLengthLong()
{
return data.length;
}
public boolean getDoInput()
{
return true;
}
public InputStream getInputStream() throws IOException
{
connect();
return new ByteArrayInputStream(data);
}
private void loadImage() throws IOException
{
if (data != null)
{
return;
}
try
{
int timeout = this.getConnectTimeout();
long start = System.currentTimeMillis();
URL url = getURL();
String imgPath = url.toExternalForm();
imgPath = imgPath.startsWith("myapp://") ? imgPath.substring("myapp://".length()) : imgPath.substring("myapp:".length()); // attention: triple '/' is reduced to a single '/'
// this is my own asynchronous image implementation
// instead of this part (including the following loop) you could do your own (synchronous) loading logic
MyImage img = MyApp.getImage(imgPath);
do
{
if (img.isFailed())
{
throw new IOException("Could not load image: " + getURL());
}
else if (!img.hasData())
{
long now = System.currentTimeMillis();
if (now - start > timeout)
{
throw new SocketTimeoutException();
}
Thread.sleep(100);
}
} while (!img.hasData());
data = img.getData();
}
catch (InterruptedException e)
{
e.printStackTrace();
}
}
public OutputStream getOutputStream() throws IOException
{
// this might be unnecessary - the whole method can probably be omitted for our purposes
return new ByteArrayOutputStream();
}
public java.security.Permission getPermission() throws IOException
{
return null; // we need no permissions to access this URL
}
}
Some parts of MyURLConnection might not be necessary for it to work, but like this it works for me.
Usage in JavaFX WebView:
<img src="myapp:///pics/image.png"/>
Note about permissions:
I used an applet with AllPermissions for my test with the above code.
In a Sandbox-Applet this won't work, as the setFactory permission is missing.
This is not directly related to the question asked, but might make the question itself obsolete.
With Java SE 6 Update 10 Java Applets support to access resources on any domain and port which is correctly set up with a crossdomain.xml.
With this the reason to register your own protocol might become obsolete, as you can access all resources that you need.
Another idea is: If you are trying to create a kind of network sniffer, why not directly use a network sniffer/analyzer program designed for such a task?
By activating Logging and Tracing in the Java Control-Panel your Java-Console will print all attempts and executed network calls including those from the WebView.
You can see all HTTP & HTTPS calls and their return-code + cookie data.
You might also see other protocol connections, but probably not any data sent over them.
This applies to Applets in a Browser.
If you need this in a different context maybe there is a way to activate the same options by passing command line parameters.
I want to unmarshal an XML file to java object using JAXB. The XML file is very large and contains some nodes which I want to skip in some cases to improve performance as these elements are non editable by client java program.
A sample XML is as follows:
<Example id="10" date="1970-01-01" version="1.0">
<Properties>...</Properties>
<Summary>...</Summary>
<RawData>
<Document id="1">...</Document>
<Document id="2">...</Document>
<Document id="3">...</Document>
------
------
</RawData>
<Location></Location>
<Title></Title>
----- // more elements
</Example>
I have two use cases:
unmarshal into Example object which contains Properties, Summaries, RawData etc. without skipping any RawData. (already done this part)
unmarshal into Example object which exclude RawData. Elements nested in RawData is very large so do not want to read this in this use case.
Now I want to unmarshal the XML such that RawData can be skipped. I have tried the technique provided at this link.
Using technique provided in above link also skips all elements which come after RawData.
I have fixed the issue with XMLEventReader with following code:
public class PartialXmlEventReader implements XMLEventReader {
private final XMLEventReader reader;
private final QName qName;
private boolean skip = false;
public PartialXmlEventReader(final XMLEventReader reader, final QName element) {
this.reader = reader;
this.qName = element;
}
#Override
public String getElementText() throws XMLStreamException {
return reader.getElementText();
}
#Override
public Object getProperty(final String name) throws IllegalArgumentException {
return reader.getProperty(name);
}
#Override
public boolean hasNext() {
return reader.hasNext();
}
#Override
public XMLEvent nextEvent() throws XMLStreamException {
while (isEof(reader.peek())) {
reader.nextEvent();
}
return reader.nextEvent();
}
#Override
public XMLEvent nextTag() throws XMLStreamException {
return reader.nextTag();
}
#Override
public XMLEvent peek() throws XMLStreamException {
return reader.peek();
}
#Override
public Object next() {
return reader.next();
}
#Override
public void remove() {
reader.remove();
}
#Override
public void close() throws XMLStreamException {
reader.close();
}
private boolean isEof(final XMLEvent e) {
boolean returnValue = skip;
switch (e.getEventType()) {
case XMLStreamConstants.START_ELEMENT:
final StartElement se = (StartElement) e;
if (se.getName().equals(qName)) {
skip = true;
returnValue = true;
}
break;
case XMLStreamConstants.END_ELEMENT:
final EndElement ee = (EndElement) e;
if (ee.getName().equals(qName)) {
skip = false;
}
break;
}
return returnValue;
}
}
While Unmarshalling just pass this eventReader to the unmarshal method
final JAXBContext context = JAXBContext.newInstance(classes);
final Unmarshaller um = context.createUnmarshaller();
Reader reader = null;
try {
reader = new BufferedReader(new FileReader(xmlFile));
final QName qName = new QName("RawData");
final XMLInputFactory xif = XMLInputFactory.newInstance();
final XMLEventReader xmlEventReader = xif.createXMLEventReader(reader);
final Example example =
(Example) um.unmarshal(new PartialXmlEventReader(xmlEventReader, qName));
}
} finally {
IOUtils.closeQuietly(reader);
}
I hope this would help
try {
// First create a new XMLInputFactory
XMLInputFactory inputFactory = XMLInputFactory.newInstance();
// Setup a new eventReader
InputStream in = new FileInputStream("myXml");
XMLEventReader eventReader = inputFactory.createXMLEventReader(in);
// Read the XML document
Example example = null;
while (eventReader.hasNext()) {
XMLEvent event = eventReader.nextEvent();
if (event.isStartElement()) {
StartElement startElement = event.asStartElement();
// If we have a example element we create a new example
if (startElement.getName().getLocalPart().equals("Example")) {
example = new Example();
// We read the attributes from this tag and add the date
// and id attribute to our object
Iterator<Attribute> attributes = startElement
.getAttributes();
while (attributes.hasNext()) {
Attribute attribute = attributes.next();
if (attribute.getName().toString().equals("date")) {
example.setDate(attribute.getValue());
} else if (attribute.getName().toString().equals("id")) {
example.setId(attribute.getValue());
}
}
}
//get the Properties tag and add to object example
if (event.isStartElement()) {
if (event.asStartElement().getName().getLocalPart()
.equals("Properties")) {
event = eventReader.nextEvent();
example.setProperites(event.asCharacters().getData());
continue;
}
}
//get the Summary tag and add to object example
if (event.asStartElement().getName().getLocalPart()
.equals("Summary")) {
event = eventReader.nextEvent();
example.setSummary(event.asCharacters().getData());
continue;
}
// when you encounter the Rawdata tag just continue
//without adding it to the object created
if (event.asStartElement().getName().getLocalPart()
.equals("Rawdata")) {
event = eventReader.nextEvent();
// don't do anything
continue;
}
//get the location tag and add to object example
if (event.asStartElement().getName().getLocalPart()
.equals("Location")) {
event = eventReader.nextEvent();
example.setLocation(event.asCharacters().getData());
continue;
}
// read and add other elements that can be added
}
// If we reach the end of an example element/tag i.e closing tag
if (event.isEndElement()) {
EndElement endElement = event.asEndElement();
if (endElement.getName().getLocalPart().equals("Example")) {
//do something
}
}
}
} catch (FileNotFoundException | XMLStreamException e) {
}