Method parse is not reenterable
-------------------------------
Key: XMLBEANS-371
URL: https://issues.apache.org/jira/browse/XMLBEANS-371
Project: XMLBeans
Issue Type: Bug
Affects Versions: Version 2.3.1
Reporter: Andrey Belyaev
I have a realisation of InputStream. The "read" method of this class parses
some xml.
When I try to parse xml from this stream i've got an error:
java.lang.NullPointerException
at
org.apache.xmlbeans.impl.store.Locale$SaxLoader.load(Locale.java:3483)
at
org.apache.xmlbeans.impl.store.Locale.parseToXmlObject(Locale.java:1270)
at
org.apache.xmlbeans.impl.store.Locale.parseToXmlObject(Locale.java:1257)
at
org.apache.xmlbeans.impl.schema.SchemaTypeLoaderBase.parse(SchemaTypeLoaderBase.java:345)
at org.apache.xmlbeans.XmlObject$Factory.parse(XmlObject.java:663)
at
xmlbeanssyscachetest.XmlBeansSysCacheTest.main(XmlBeansSysCacheTest.java:32)
The error caused by using the same instance of SaxParser in inner and outter
parse processes.
After the end of inner parse the parser is closed but the outter parse proceeds
use it.
We tried to solve the problem by overriding of the
org.apache.xmlbeans.impl.common.SystemCache class but
it's also done in org.apache.xmlbeans.impl.schema.SchemaTypeLoaderImpl class.
So this variant is not safe enougth.
Sample:
package xmlbeanssyscachetest;
import java.io.ByteArrayInputStream;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.xmlbeans.XmlObject;
public class XmlBeansSysCacheTest {
static class TestInputStream extends ByteArrayInputStream{
private static byte[] data = "<?xml version=\"1.0\"
encoding=\"UTF-8\"?><test/>".getBytes();
public TestInputStream() {
super(data);
}
@Override
public synchronized int read(byte b[], int off, int len) {
try { //do some parse during other (outter) parse
XmlObject x = XmlObject.Factory.parse(new
ByteArrayInputStream(data));
System.out.println(x.xmlText());
} catch (Exception ex) {
Logger.getLogger(XmlBeansSysCacheTest.class.getName()).log(Level.SEVERE, null,
ex);
}
return super.read(b, off, len);
}
}
public static void main(String[] args) {
try {
XmlObject x = XmlObject.Factory.parse(new TestInputStream());
} catch (Exception ex) {
Logger.getLogger(XmlBeansSysCacheTest.class.getName()).log(Level.SEVERE, null,
ex);
}
}
}
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