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https://issues.apache.org/jira/browse/XMLBEANS-477?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Andreas Beeker closed XMLBEANS-477.
-----------------------------------
> Piccolo parser improperly retains and re-closes InputStream from previous
> invocation
> ------------------------------------------------------------------------------------
>
> Key: XMLBEANS-477
> URL: https://issues.apache.org/jira/browse/XMLBEANS-477
> Project: XMLBeans
> Issue Type: Bug
> Affects Versions: Version 2.4 , Version 2.5
> Reporter: Robby Morgan
> Priority: Major
> Fix For: Version 5.0.1
>
>
> I have uncovered odd behavior within the Piccolo parser when XMLBeans is
> asked to parse a second document on the same thread. What I have observed is
> that, while the Piccolo parser closes the input stream after parsing the
> first document, it retains a reference to the input stream and closes it
> again immediately before parsing the input stream for the second document.
> If the input stream reference is the same for the two documents, as is the
> case when a request is processed on the same thread in Tomcat, then the
> second document will fail to parse.
> Here is sample code that demonstrates the issue:
> {code}
> import my.xmlbeans.ServerDocument;
> import org.apache.commons.io.input.ProxyInputStream;
> import org.apache.xmlbeans.XmlException;
> import org.apache.xmlbeans.XmlOptions;
> import java.io.File;
> import java.io.FileInputStream;
> import java.io.IOException;
> import java.io.InputStream;
> /**
> * Issue: XmlBeans (when using the Piccolo SAX parser) retains a reference
> to the previous input stream on the
> * current thread, and if that stream is reopened and passed back into
> XmlBeans, then the stream will be closed
> * prior to parsing any of the contents, producing the following exception:
> *
> * Exception in thread "main" java.lang.IllegalStateException: Stream is
> already closed
> * at
> XmlBeansReclosingIssue$ReopenableInputStream.beforeRead(XmlBeansReclosingIssue.java:50)
> * at
> org.apache.commons.io.input.ProxyInputStream.read(ProxyInputStream.java:98)
> * at
> org.apache.xmlbeans.impl.piccolo.xml.XMLStreamReader.fillByteBuffer(XMLStreamReader.java:209)
> * at
> org.apache.xmlbeans.impl.piccolo.xml.XMLStreamReader.reset(XMLStreamReader.java:97)
> * at
> org.apache.xmlbeans.impl.piccolo.xml.DocumentEntity.open(DocumentEntity.java:94)
> * at
> org.apache.xmlbeans.impl.piccolo.xml.PiccoloLexer.reset(PiccoloLexer.java:982)
> * at org.apache.xmlbeans.impl.piccolo.xml.Piccolo.parse(Piccolo.java:709)
> * at org.apache.xmlbeans.impl.store.Locale$SaxLoader.load(Locale.java:3454)
> * at org.apache.xmlbeans.impl.store.Locale.parseToXmlObject(Locale.java:1276)
> * at org.apache.xmlbeans.impl.store.Locale.parseToXmlObject(Locale.java:1250)
> * at
> org.apache.xmlbeans.impl.schema.SchemaTypeLoaderBase.parse(SchemaTypeLoaderBase.java:345)
> * at my.xmlbeans.ServerDocument$Factory.parse(Unknown Source)
> * at XmlBeansReclosingIssue.main(XmlBeansReclosingIssue.java:40)
> */
> public class XmlBeansReclosingIssue {
> public static void main(String[] args) throws IOException, XmlException {
> File inputFile = new File(args[0]);
> ReopenableInputStream reopenableInputStream = new
> ReopenableInputStream(new FileInputStream(inputFile));
> ServerDocument.Factory.parse(reopenableInputStream, new
> XmlOptions().setUnsynchronized());
> reopenableInputStream.reopen(new FileInputStream(inputFile));
> ServerDocument.Factory.parse(reopenableInputStream, new
> XmlOptions().setUnsynchronized());
> }
> private static class ReopenableInputStream extends ProxyInputStream {
> private boolean _closed;
> public ReopenableInputStream(FileInputStream inputStream) {
> super(inputStream);
> _closed = false;
> }
> public void reopen(InputStream in) {
> if (!_closed) {
> throw new IllegalStateException("Stream is not closed");
> }
> _closed = false;
> this.in = in;
> }
> @Override
> protected void beforeRead(int n) throws IOException {
> if (_closed) {
> throw new IllegalStateException("Stream is already closed");
> }
> }
> @Override
> public void close() throws IOException {
> if (_closed) {
> throw new IllegalStateException("Stream is already closed");
> }
> _closed = true;
> super.close();
> }
> }
> }
> {code}
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