[ sisc-Bugs-1750268 ] error handling in contrib/pure-scheme/sexp-xml.scm

Bugs item #1750268, was opened at 2007-07-09 03:05
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: error handling in contrib/pure-scheme/sexp-xml.scm

Initial Comment:
sisc 1.16.6

the bug occurs for example if org.sax can't find the DTD (see below) or if java runs out of memory because of a very large XML-file (47MB, deeply nested and with references to external XML-Entities).

sisc@fahrrad> (sexp-xml:xml->sexp/file "foo.xml")
Error in ->string: <java.lang.NullPointerException>: null
---------------------------
file:/home/johannes/sisc/contrib/pure-scheme/sexp-xml.scm:293:31: <from call to @s2j-conversion::->string>
---------------------------
file:/home/johannes/sisc/contrib/pure-scheme/sexp-xml.scm:266:5: <from call to with/fc>
---------------------------
file:/home/johannes/sisc/contrib/pure-scheme/sexp-xml.scm:234:3: <indeterminate call>
console:314:1: <from call to @sexp-xml::sexp-xml:xml->sexp/file>

i defined all functions from sexp-xml.scm inside the repl and tested only what goes into arg1 of with/fc (lambda (m e) ...) inside function sexp->xml/input-source: i tried to construct (parse xml-reader input-source) manually and received the following error (which lead to the above error when calling from outside):

sisc@fahrrad> (let* ((input-source (java-new <org.xml.sax.input-source> (java-new <java.io.file-reader> (|->jstring| "/home/johannes/du/cvs-modules/traffic-nrw-dav/doc/versorgungsdatei.OLSIM.sample.xml")))) (sa (new-ssax-accumulator)) (xml-reader (get-xml-reader-with-proxy (make-content-handler-proxy sa)))) (parse xml-reader input-source))
Error: #<java java.io.FileNotFoundException java.io.FileNotFoundException: /usr/home/johannes/K2S.dtd (No such file or directory)>
java.io.FileNotFoundException: /usr/home/johannes/K2S.dtd (No such file or directory)
	at java.io.FileInputStream.open(Native Method)
	at java.io.FileInputStream.<init>(FileInputStream.java:106)
	at java.io.FileInputStream.<init>(FileInputStream.java:66)
	at sun.net.www.protocol.file.FileURLConnection.connect(FileURLConnection.java:70)
	at sun.net.www.protocol.file.FileURLConnection.getInputStream(FileURLConnection.java:161)
	at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(XMLEntityManager.java:973)
	at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startEntity(XMLEntityManager.java:905)
	at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startDTDEntity(XMLEntityManager.java:872)
	at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.setInputSource(XMLDTDScannerImpl.java:282)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDispatcher.dispatch(XMLDocumentScannerImpl.java:1021)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:834)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)
	at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:148)
	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1242)
	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:585)
	at sisc.modules.s2j.Operation.invokeMethod(Unknown Source)
	at sisc.modules.s2j.Operation.doApply(Unknown Source)
	at sisc.nativefun.NativeProcedure.apply(Unknown Source)
	at sisc.exprs.AppEval.eval(Unknown Source)
	at sisc.interpreter.Interpreter.next(Unknown Source)
	at sisc.exprs.AppExp.eval(Unknown Source)
	at sisc.interpreter.Interpreter.interpret(Unknown Source)
	at sisc.interpreter.Interpreter.interpret(Unknown Source)
	at sisc.interpreter.Interpreter.eval(Unknown Source)
	at sisc.data.SchemeThread.run(Unknown Source)
	at java.lang.Thread.run(Thread.java:595)
---------------------------
console:266:296: <from call to parse>


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