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List:       xmlbeans-dev
Subject:    [jira] Updated: (XMLBEANS-371) Method parse is not reenterable
From:       "Andrey Belyaev (JIRA)" <xmlbeans-dev () xml ! apache ! org>
Date:       2008-04-24 10:43:22
Message-ID: 618461933.1209033802426.JavaMail.jira () brutus
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     [ https://issues.apache.org/jira/browse/XMLBEANS-371?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel \
]

Andrey Belyaev updated XMLBEANS-371:
------------------------------------

    Description: 
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 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);  }
    }
}
 

  was:
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);  }
    }
}
 


> 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 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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