Re: Help with NSXMLOutputStream/NSSMLInputStream

Robert Walker Wed, 14 Dec 2005 09:41:35 -0800

Oh sorry. Here is line 70:

// XML output stream

xmlos = new NSXMLOutputStream(os);

On Dec 14, 2005, at 11:06 AM, Jean-François Veillette wrote:

at ProcessorService.serialize(ProcessorService.java:70)

where is line 70 ?

- jfv

Le 05-12-14, à 11:01, Robert Walker a écrit :

I need to serialize some objects for use in web services and am getting the following exception for this example code:

Error occurs on both Xcode 2.0/WO 5.2.4 and Xcode 2.2/WO 5.3.1... Simply calling this static method from Application class as a test. Doesn't seem to matter where it's called: also tried calling it from an action method on Main page.

   public static void serialize() {
String fileName = "/tmp/example.xml";
   BufferedOutputStream os = null;
   NSXMLOutputStream xmlos = null;

try {
   // File output stream
   os = new BufferedOutputStream(new FileOutputStream(fileName));

// XML output stream
   xmlos = new NSXMLOutputStream(os);

// Write the data
   xmlos.writeObject("Hello World!");
   xmlos.writeInt(5);
} catch (Exception e) {
NSLog.err.appendln("Exception encountered: " + e.getMessage());
if (NSLog.debugLoggingAllowedForLevel(NSLog.DebugLevelCritical)) {
NSLog.debug.appendln(e);
}
   } finally {
try {
   // close the streams
   xmlos.flush();
xmlos.close();
os.close();
} catch (Exception e) {
NSLog.err.appendln("Exception encountered: " + e.getMessage());
if (NSLog.debugLoggingAllowedForLevel(NSLog.DebugLevelCritical)) {
NSLog.debug.appendln(e);
}
}
}
}

------------------------
Exception:

[2005-12-14 10:56:29 EST] <main> java.lang.NullPointerException
at ProcessorService.serialize(ProcessorService.java:70)
   at Application.<init>(Application.java:52)
   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:308)
   at java.lang.Class.newInstance(Class.java:261)
   at com.webobjects.appserver.WOApplication.main(WOApplication.java:323)
   at Application.main(Application.java:19)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:324)
   at com.webobjects._bootstrap.WOBootstrap.main(WOBootstrap.java:71)

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