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How can I unlock a file locked by JAXB unmarhsaller

I am parsing an XML file with JAXB w / Java 1.7.0_03 on Windows 7 x64 using the following code:

 try (InputStream xsdStream = ConfigurationService.class.getClassLoader().getResourceAsStream(CONFIG_XSD_FILE_NAME)) {
            configFile = new File(configFilePath);
            if (configFile.exists()) {
                context = JAXBContext.newInstance(Config.class);
                Unmarshaller unMarshaller = context.createUnmarshaller();

                SchemaFactory sf = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
                StreamSource xsdStreamSource = new StreamSource(xsdStream);
                Schema schema = sf.newSchema(xsdStreamSource);

                unMarshaller.setSchema(schema);
                Object xmlObject = Config.class.cast(unMarshaller.unmarshal(configFile));
                myConfig = (Config) xmlObject;
            } else {
                log.severe(configFile.getAbsolutePath() + " does not exist, can not parse configuration info from it.");
            }
  }

The code that calls this method subsequently deletes the XML file.

The XML file will be deleted correctly if unmarhalling is successful. However, if the code above generates and excludes, for example. SAXException, the XML file remains locked indefinitely, and the calling code cannot delete it using File.delete ().

JAXB doesn't seem to close the resource / file in this case. Is it my duty to do it somehow or is it a mistake?

The javadoc recall for Unmarshaller did not shed any light on this, and Googling found this problem to this old, unanswered question from 2008.

+5
1

SHORT ANSWER

, , JAXB. , :

unmarshalling a File FileInputStream , unmarshalling.

, . , . JDK 1.7.0_07 x64 Mac.

. , , .

package forum14765898;

import java.io.*;

import javax.xml.XMLConstants;
import javax.xml.bind.*;
import javax.xml.transform.stream.StreamSource;
import javax.xml.validation.*;

public class ConfigurationService {

    private static final String CONFIG_XSD_FILE_NAME = "forum14765898/schema.xsd";

    public static void main(String[] args) throws Exception {
        File configFile = null;
        String configFilePath = "src/forum14765898/input.xml";
        JAXBContext context;
        Config myConfig;

        try (InputStream xsdStream = ConfigurationService.class.getClassLoader().getResourceAsStream(CONFIG_XSD_FILE_NAME)) {
            configFile = new File(configFilePath);
            if (configFile.exists()) {
                context = JAXBContext.newInstance(Config.class);
                Unmarshaller unMarshaller = context.createUnmarshaller();

                SchemaFactory sf = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
                StreamSource xsdStreamSource = new StreamSource(xsdStream);
                Schema schema = sf.newSchema(xsdStreamSource);

                unMarshaller.setSchema(schema);
                Object xmlObject = Config.class.cast(unMarshaller.unmarshal(configFile));
                myConfig = (Config) xmlObject;
            } else {
                //log.severe(configFile.getAbsolutePath() + " does not exist, can not parse configuration info from it.");
            }
        } catch(Exception e) {
            e.printStackTrace(System.out);
        }

        configFile.delete();
        System.out.println(configFile.exists());

    }

}

schema.xsd

XML-, .

<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema">
    <element name="config">
        <complexType>
            <sequence>
                <element name="bar" type="int"/>
            </sequence>
        </complexType>
    </element>
</schema>

Input.xml

XML. bar XML-. a Schema Unmarshaller, , Exception unmarshal.

<?xml version="1.0" encoding="UTF-8"?>
<config>
    <bar>INVALID</bar>
</config>

Config

package forum14765898;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class Config {

    public int bar;

}

. , , XML , .

javax.xml.bind.UnmarshalException
 - with linked exception:
[org.xml.sax.SAXParseException; systemId: file:/Users/bdoughan/Scratch/src/forum14765898/input.xml; lineNumber: 3; columnNumber: 23; cvc-datatype-valid.1.2.1: 'INVALID' is not a valid value for 'integer'.]
    at javax.xml.bind.helpers.AbstractUnmarshallerImpl.createUnmarshalException(AbstractUnmarshallerImpl.java:335)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.createUnmarshalException(UnmarshallerImpl.java:512)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:209)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:175)
    at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:157)
    at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:162)
    at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:171)
    at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:189)
    at forum14765898.ConfigurationService.main(ConfigurationService.java:31)
Caused by: org.xml.sax.SAXParseException; systemId: file:/Users/bdoughan/Scratch/src/forum14765898/input.xml; lineNumber: 3; columnNumber: 23; cvc-datatype-valid.1.2.1: 'INVALID' is not a valid value for 'integer'.
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:198)
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:134)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:437)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:368)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:325)
    at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator$XSIErrorReporter.reportError(XMLSchemaValidator.java:453)
    at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.reportSchemaError(XMLSchemaValidator.java:3232)
    at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.elementLocallyValidType(XMLSchemaValidator.java:3147)
    at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.processElementContent(XMLSchemaValidator.java:3057)
    at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.handleEndElement(XMLSchemaValidator.java:2135)
    at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.endElement(XMLSchemaValidator.java:854)
    at com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorHandlerImpl.endElement(ValidatorHandlerImpl.java:579)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.ValidatingUnmarshaller.endElement(ValidatingUnmarshaller.java:91)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.SAXConnector.endElement(SAXConnector.java:143)
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:606)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1742)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2900)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:607)
    at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:116)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:489)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:835)
    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:123)
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1210)
    at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:568)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:203)
    ... 6 more
false
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