Example usage for org.xml.sax.helpers XMLReaderFactory createXMLReader

List of usage examples for org.xml.sax.helpers XMLReaderFactory createXMLReader

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Introduction

In this page you can find the example usage for org.xml.sax.helpers XMLReaderFactory createXMLReader.

Prototype

public static XMLReader createXMLReader() throws SAXException

Source Link

Document

Obtains a new instance of a org.xml.sax.XMLReader .

Usage

From source file:org.opennms.core.xml.JaxbUtils.java

public static <T> XMLFilter getXMLFilterForClass(final Class<T> clazz) throws SAXException {
    final String namespace = getNamespaceForClass(clazz);
    XMLFilter filter = namespace == null ? new SimpleNamespaceFilter("", false)
            : new SimpleNamespaceFilter(namespace, true);

    LOG.trace("namespace filter for class {}: {}", clazz, filter);
    final XMLReader xmlReader = XMLReaderFactory.createXMLReader();
    xmlReader.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);

    filter.setParent(xmlReader);/* w w  w . j  a  va 2 s .c  om*/
    return filter;
}

From source file:org.opennms.netmgt.measurements.impl.RrdtoolXportFetchStrategy.java

/**
 * {@inheritDoc}/* www . ja v a 2s  .  co m*/
 */
@Override
protected FetchResults fetchMeasurements(long start, long end, long step, int maxrows,
        Map<Source, String> rrdsBySource, Map<String, Object> constants) throws RrdException {

    String rrdBinary = System.getProperty("rrd.binary");
    if (rrdBinary == null) {
        throw new RrdException("No RRD binary is set.");
    }

    final long startInSeconds = (long) Math.floor(start / 1000);
    final long endInSeconds = (long) Math.floor(end / 1000);

    long stepInSeconds = (long) Math.floor(step / 1000);
    // The step must be strictly positive
    if (stepInSeconds <= 0) {
        stepInSeconds = 1;
    }

    final CommandLine cmdLine = new CommandLine(rrdBinary);
    cmdLine.addArgument("xport");
    cmdLine.addArgument("--step");
    cmdLine.addArgument("" + stepInSeconds);
    cmdLine.addArgument("--start");
    cmdLine.addArgument("" + startInSeconds);
    cmdLine.addArgument("--end");
    cmdLine.addArgument("" + endInSeconds);
    if (maxrows > 0) {
        cmdLine.addArgument("--maxrows");
        cmdLine.addArgument("" + maxrows);
    }

    // Use labels without spaces when executing the xport command
    // These are mapped back to the requested labels in the response
    final Map<String, String> labelMap = Maps.newHashMap();

    int k = 0;
    for (final Map.Entry<Source, String> entry : rrdsBySource.entrySet()) {
        final Source source = entry.getKey();
        final String rrdFile = entry.getValue();
        final String tempLabel = Integer.toString(++k);
        labelMap.put(tempLabel, source.getLabel());

        cmdLine.addArgument(String.format("DEF:%s=%s:%s:%s", tempLabel, Utils.escapeColons(rrdFile),
                Utils.escapeColons(source.getEffectiveDataSource()), source.getAggregation()));
        cmdLine.addArgument(String.format("XPORT:%s:%s", tempLabel, tempLabel));
    }

    // Use commons-exec to execute rrdtool
    final DefaultExecutor executor = new DefaultExecutor();

    // Capture stdout/stderr
    final ByteArrayOutputStream stdout = new ByteArrayOutputStream();
    final ByteArrayOutputStream stderr = new ByteArrayOutputStream();
    executor.setStreamHandler(new PumpStreamHandler(stdout, stderr, null));

    // Fail if we get a non-zero exit code
    executor.setExitValue(0);

    // Fail if the process takes too long
    final ExecuteWatchdog watchdog = new ExecuteWatchdog(XPORT_TIMEOUT_MS);
    executor.setWatchdog(watchdog);

    // Export
    RrdXport rrdXport;
    try {
        LOG.debug("Executing: {}", cmdLine);
        executor.execute(cmdLine);

        final XMLReader xmlReader = XMLReaderFactory.createXMLReader();
        xmlReader.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
        final SAXSource source = new SAXSource(xmlReader, new InputSource(new StringReader(stdout.toString())));
        final JAXBContext jc = JAXBContext.newInstance(RrdXport.class);
        final Unmarshaller u = jc.createUnmarshaller();
        rrdXport = (RrdXport) u.unmarshal(source);
    } catch (IOException e) {
        throw new RrdException("An error occured while executing '" + StringUtils.join(cmdLine.toStrings(), " ")
                + "' with stderr: " + stderr.toString(), e);
    } catch (SAXException | JAXBException e) {
        throw new RrdException("The output generated by 'rrdtool xport' could not be parsed.", e);
    }

    final int numRows = rrdXport.getRows().size();
    final int numColumns = rrdXport.getMeta().getLegends().size();
    final long xportStartInMs = rrdXport.getMeta().getStart() * 1000;
    final long xportStepInMs = rrdXport.getMeta().getStep() * 1000;

    final long timestamps[] = new long[numRows];
    final double values[][] = new double[numColumns][numRows];

    // Convert rows to columns
    int i = 0;
    for (final XRow row : rrdXport.getRows()) {
        // Derive the timestamp from the start and step since newer versions
        // of rrdtool no longer include it as part of the rows
        timestamps[i] = xportStartInMs + xportStepInMs * i;
        for (int j = 0; j < numColumns; j++) {
            if (row.getValues() == null) {
                // NMS-7710: Avoid NPEs, in certain cases the list of values may be null
                throw new RrdException(
                        "The output generated by 'rrdtool xport' was not recognized. Try upgrading your rrdtool binaries.");
            }
            values[j][i] = row.getValues().get(j);
        }
        i++;
    }

    // Map the columns by label
    // The legend entries are in the same order as the column values
    final Map<String, double[]> columns = Maps.newHashMapWithExpectedSize(numColumns);
    i = 0;
    for (String label : rrdXport.getMeta().getLegends()) {
        columns.put(labelMap.get(label), values[i++]);
    }

    return new FetchResults(timestamps, columns, xportStepInMs, constants);
}

From source file:org.opennms.web.rest.measurements.fetch.RrdtoolXportFetchStrategy.java

/**
 * {@inheritDoc}/*w w w  .ja  v  a  2s.com*/
 */
@Override
protected FetchResults fetchMeasurements(long start, long end, long step, int maxrows,
        Map<Source, String> rrdsBySource, Map<String, Object> constants) throws RrdException {

    String rrdBinary = System.getProperty("rrd.binary");
    if (rrdBinary == null) {
        throw new RrdException("No RRD binary is set.");
    }

    final long startInSeconds = (long) Math.floor(start / 1000);
    final long endInSeconds = (long) Math.floor(end / 1000);

    long stepInSeconds = (long) Math.floor(step / 1000);
    // The step must be strictly positive
    if (stepInSeconds <= 0) {
        stepInSeconds = 1;
    }

    final CommandLine cmdLine = new CommandLine(rrdBinary);
    cmdLine.addArgument("xport");
    cmdLine.addArgument("--step");
    cmdLine.addArgument("" + stepInSeconds);
    cmdLine.addArgument("--start");
    cmdLine.addArgument("" + startInSeconds);
    cmdLine.addArgument("--end");
    cmdLine.addArgument("" + endInSeconds);
    if (maxrows > 0) {
        cmdLine.addArgument("--maxrows");
        cmdLine.addArgument("" + maxrows);
    }

    // Use labels without spaces when executing the xport command
    // These are mapped back to the requested labels in the response
    final Map<String, String> labelMap = Maps.newHashMap();

    int k = 0;
    for (final Map.Entry<Source, String> entry : rrdsBySource.entrySet()) {
        final Source source = entry.getKey();
        final String rrdFile = entry.getValue();
        final String tempLabel = Integer.toString(++k);
        labelMap.put(tempLabel, source.getLabel());

        cmdLine.addArgument(String.format("DEF:%s=%s:%s:%s", tempLabel, rrdFile, source.getAttribute(),
                source.getAggregation()));
        cmdLine.addArgument(String.format("XPORT:%s:%s", tempLabel, tempLabel));
    }

    // Use commons-exec to execute rrdtool
    final DefaultExecutor executor = new DefaultExecutor();

    // Capture stdout/stderr
    final ByteArrayOutputStream stdout = new ByteArrayOutputStream();
    final ByteArrayOutputStream stderr = new ByteArrayOutputStream();
    executor.setStreamHandler(new PumpStreamHandler(stdout, stderr, null));

    // Fail if we get a non-zero exit code
    executor.setExitValue(0);

    // Fail if the process takes too long
    final ExecuteWatchdog watchdog = new ExecuteWatchdog(XPORT_TIMEOUT_MS);
    executor.setWatchdog(watchdog);

    // Export
    RrdXport rrdXport;
    try {
        executor.execute(cmdLine);

        final XMLReader xmlReader = XMLReaderFactory.createXMLReader();
        xmlReader.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
        final SAXSource source = new SAXSource(xmlReader, new InputSource(new StringReader(stdout.toString())));
        final JAXBContext jc = JAXBContext.newInstance(RrdXport.class);
        final Unmarshaller u = jc.createUnmarshaller();
        rrdXport = (RrdXport) u.unmarshal(source);
    } catch (IOException e) {
        throw new RrdException("An error occured while executing '" + StringUtils.join(cmdLine.toStrings(), " ")
                + "' with stderr: " + stderr.toString(), e);
    } catch (SAXException | JAXBException e) {
        throw new RrdException("The output generated by 'rrdtool xport' could not be parsed.", e);
    }

    final int numRows = rrdXport.getRows().size();
    final int numColumns = rrdXport.getMeta().getLegends().size();

    final long timestamps[] = new long[numRows];
    final double values[][] = new double[numColumns][numRows];

    // Convert rows to columns
    int i = 0;
    for (final XRow row : rrdXport.getRows()) {
        timestamps[i] = row.getTimestamp() * 1000;
        for (int j = 0; j < numColumns; j++) {
            if (row.getValues() == null) {
                // NMS-7710: Avoid NPEs, in certain cases the list of values may be null
                throw new RrdException(
                        "The output generated by 'rrdtool xport' was not recognized. Try upgrading your rrdtool binaries.");
            }
            values[j][i] = row.getValues().get(j);
        }
        i++;
    }

    // Map the columns by label
    // The legend entries are in the same order as the column values
    final Map<String, double[]> columns = Maps.newHashMapWithExpectedSize(numColumns);
    i = 0;
    for (String label : rrdXport.getMeta().getLegends()) {
        columns.put(labelMap.get(label), values[i++]);
    }

    return new FetchResults(timestamps, columns, rrdXport.getMeta().getStep() * 1000, constants);
}

From source file:org.openstreetmap.josm.tools.ImageProvider.java

/**
 * Reads the wiki page on a certain file in html format in order to find the real image URL.
 *///from ww w.j  a  v  a  2 s  . co m
private static String getImgUrlFromWikiInfoPage(final String base, final String fn) {

    /** Quit parsing, when a certain condition is met */
    class SAXReturnException extends SAXException {
        private String result;

        public SAXReturnException(String result) {
            this.result = result;
        }

        public String getResult() {
            return result;
        }
    }

    try {
        final XMLReader parser = XMLReaderFactory.createXMLReader();
        parser.setContentHandler(new DefaultHandler() {
            @Override
            public void startElement(String uri, String localName, String qName, Attributes atts)
                    throws SAXException {
                System.out.println();
                if (localName.equalsIgnoreCase("img")) {
                    String val = atts.getValue("src");
                    if (val.endsWith(fn))
                        throw new SAXReturnException(val); // parsing done, quit early
                }
            }
        });

        parser.setEntityResolver(new EntityResolver() {
            public InputSource resolveEntity(String publicId, String systemId) {
                return new InputSource(new ByteArrayInputStream(new byte[0]));
            }
        });

        parser.parse(new InputSource(new MirroredInputStream(base + fn,
                new File(Main.pref.getPreferencesDir(), "images").toString())));
    } catch (SAXReturnException r) {
        return r.getResult();
    } catch (Exception e) {
        System.out.println("INFO: parsing " + base + fn + " failed:\n" + e);
        return null;
    }
    System.out.println("INFO: parsing " + base + fn + " failed: Unexpected content.");
    return null;
}

From source file:org.roda.core.common.RodaUtils.java

/**
 * INFO 20160711 this method does not cache stylesheet related resources
 *//* www  .j  a va  2s .c  o  m*/
public static void applyStylesheet(Reader xsltReader, Reader fileReader, Map<String, String> parameters,
        Writer result) throws IOException, TransformerException {

    TransformerFactory factory = new net.sf.saxon.TransformerFactoryImpl();
    factory.setURIResolver(new RodaURIFileResolver());
    Source xsltSource = new StreamSource(xsltReader);
    Transformer transformer = factory.newTransformer(xsltSource);
    for (Entry<String, String> parameter : parameters.entrySet()) {
        transformer.setParameter(parameter.getKey(), parameter.getValue());
    }
    try {
        XMLReader xmlReader = XMLReaderFactory.createXMLReader();
        xmlReader.setEntityResolver(new RodaEntityResolver());
        InputSource source = new InputSource(fileReader);
        Source text = new SAXSource(xmlReader, source);
        transformer.transform(text, new StreamResult(result));
    } catch (SAXException se) {
        LOGGER.error(se.getMessage(), se);
    }
}

From source file:org.roda.core.common.RodaUtils.java

public static Reader applyMetadataStylesheet(Binary binary, String basePath, String metadataType,
        String metadataVersion, Map<String, String> parameters) throws GenericException {
    try (Reader descMetadataReader = new InputStreamReader(
            new BOMInputStream(binary.getContent().createInputStream()))) {

        XMLReader xmlReader = XMLReaderFactory.createXMLReader();
        xmlReader.setEntityResolver(new RodaEntityResolver());
        InputSource source = new InputSource(descMetadataReader);
        Source text = new SAXSource(xmlReader, source);

        XsltExecutable xsltExecutable = CACHE.get(Triple.of(basePath, metadataType, metadataVersion));

        XsltTransformer transformer = xsltExecutable.load();
        CharArrayWriter transformerResult = new CharArrayWriter();

        transformer.setSource(text);/*from  w w  w  .  j a  v  a  2 s  . c o  m*/
        transformer.setDestination(PROCESSOR.newSerializer(transformerResult));

        for (Entry<String, String> parameter : parameters.entrySet()) {
            QName qName = new QName(parameter.getKey());
            XdmValue xdmValue = new XdmAtomicValue(parameter.getValue());
            transformer.setParameter(qName, xdmValue);
        }

        transformer.transform();

        return new CharArrayReader(transformerResult.toCharArray());

    } catch (IOException | SAXException | ExecutionException | SaxonApiException e) {
        throw new GenericException("Could not process descriptive metadata binary " + binary.getStoragePath()
                + " metadata type " + metadataType + " and version " + metadataVersion, e);
    }
}

From source file:org.roda.core.common.RodaUtils.java

public static Reader applyEventStylesheet(Binary binary, boolean onlyDetails, Map<String, String> translations,
        String path) throws GenericException {
    try (Reader descMetadataReader = new InputStreamReader(
            new BOMInputStream(binary.getContent().createInputStream()))) {

        XMLReader xmlReader = XMLReaderFactory.createXMLReader();
        xmlReader.setEntityResolver(new RodaEntityResolver());
        InputSource source = new InputSource(descMetadataReader);
        Source text = new SAXSource(xmlReader, source);

        XsltExecutable xsltExecutable = EVENT_CACHE.get(path);

        XsltTransformer transformer = xsltExecutable.load();
        CharArrayWriter transformerResult = new CharArrayWriter();

        transformer.setSource(text);// ww  w  . j  ava 2s . com
        transformer.setDestination(PROCESSOR.newSerializer(transformerResult));

        // send param to filter stylesheet work
        transformer.setParameter(new QName("onlyDetails"), new XdmAtomicValue(Boolean.toString(onlyDetails)));

        for (Entry<String, String> parameter : translations.entrySet()) {
            QName qName = new QName(parameter.getKey());
            XdmValue xdmValue = new XdmAtomicValue(parameter.getValue());
            transformer.setParameter(qName, xdmValue);
        }

        transformer.transform();
        return new CharArrayReader(transformerResult.toCharArray());
    } catch (IOException | SAXException | ExecutionException | SaxonApiException e) {
        LOGGER.error(e.getMessage(), e);
        throw new GenericException("Could not process event binary " + binary.getStoragePath(), e);
    }
}

From source file:org.roda.core.common.validation.ValidationUtils.java

public static ValidationReport isXMLValid(ContentPayload xmlPayload) {
    ValidationReport ret = new ValidationReport();

    SAXParserFactory factory = SAXParserFactory.newInstance();
    factory.setValidating(false);//from  w w  w. j  a va  2 s . co  m
    factory.setNamespaceAware(true);

    RodaErrorHandler errorHandler = new RodaErrorHandler();

    try (Reader reader = new InputStreamReader(new BOMInputStream(xmlPayload.createInputStream()))) {
        XMLReader xmlReader = XMLReaderFactory.createXMLReader();
        xmlReader.setEntityResolver(new RodaEntityResolver());
        InputSource inputSource = new InputSource(reader);

        xmlReader.setErrorHandler(errorHandler);
        xmlReader.parse(inputSource);
        ret.setValid(errorHandler.getErrors().isEmpty());
        for (SAXParseException saxParseException : errorHandler.getErrors()) {
            ret.addIssue(convertSAXParseException(saxParseException));
        }
    } catch (SAXException e) {
        ret.setValid(false);
        for (SAXParseException saxParseException : errorHandler.getErrors()) {
            ret.addIssue(convertSAXParseException(saxParseException));
        }
    } catch (IOException e) {
        ret.setValid(false);
        ret.setMessage(e.getMessage());
    }
    return ret;
}

From source file:org.roda.core.common.validation.ValidationUtils.java

/**
 * Validates descriptive medatada (e.g. against its schema, but other
 * strategies may be used)/* w ww .  j  a  v  a  2  s  . c o  m*/
 * 
 * @param descriptiveMetadataType
 * 
 * @param failIfNoSchema
 * @throws ValidationException
 */
public static ValidationReport validateDescriptiveBinary(ContentPayload descriptiveMetadataPayload,
        String descriptiveMetadataType, String descriptiveMetadataVersion, boolean failIfNoSchema) {
    ValidationReport ret = new ValidationReport();
    InputStream inputStream = null;
    Optional<Schema> xmlSchema = RodaCoreFactory.getRodaSchema(descriptiveMetadataType,
            descriptiveMetadataVersion);
    try {
        if (xmlSchema.isPresent()) {
            RodaErrorHandler errorHandler = new RodaErrorHandler();

            try (InputStreamReader inputStreamReader = new InputStreamReader(
                    new BOMInputStream(descriptiveMetadataPayload.createInputStream()))) {

                XMLReader xmlReader = XMLReaderFactory.createXMLReader();
                xmlReader.setEntityResolver(new RodaEntityResolver());
                InputSource inputSource = new InputSource(inputStreamReader);
                Source source = new SAXSource(xmlReader, inputSource);

                Validator validator = xmlSchema.get().newValidator();

                validator.setErrorHandler(errorHandler);

                validator.validate(source);
                ret.setValid(errorHandler.getErrors().isEmpty());
                for (SAXParseException saxParseException : errorHandler.getErrors()) {
                    ret.addIssue(convertSAXParseException(saxParseException));
                }
            } catch (SAXException e) {
                LOGGER.debug("Error validating descriptive binary " + descriptiveMetadataType, e);
                ret.setValid(false);
                for (SAXParseException saxParseException : errorHandler.getErrors()) {
                    ret.addIssue(convertSAXParseException(saxParseException));
                }
            }
        } else {
            if (failIfNoSchema) {
                LOGGER.error(
                        "Will fail validating descriptive metadata with type '{}' and version '{}' because couldn't find its schema",
                        descriptiveMetadataType, descriptiveMetadataVersion);
                ret.setValid(false);
                ret.setMessage("No schema to validate " + descriptiveMetadataType);
            } else {
                LOGGER.debug(
                        "Found no schema do validate descriptive metadata but will try to validate XML syntax...");
                ret = isXMLValid(descriptiveMetadataPayload);
            }
        }
    } catch (IOException e) {
        LOGGER.error("Error validating descriptive metadata", e);
        ret.setValid(false);
        ret.setMessage(e.getMessage());
    } finally {
        IOUtils.closeQuietly(inputStream);
    }

    return ret;

}

From source file:org.sakaiproject.kernel.component.core.PersistenceUnitClassLoader.java

/**
 * Scans the classloader for files named META-INF/orm.xml and consolidates
 * them.//w ww .j  a  v  a2 s.  co m
 *
 * @return A consolidated String representing all orm.xml files found.
 * @throws IOException
 * @throws SAXException
 */
private String scanOrmXml() throws TransformerConfigurationException, IOException, SAXException {
    StringWriter writer = new StringWriter();
    StreamResult result = new StreamResult(writer);

    // SAX2.0 ContentHandler
    SAXTransformerFactory tf = (SAXTransformerFactory) SAXTransformerFactory.newInstance();
    TransformerHandler handler = tf.newTransformerHandler();
    Transformer serializer = handler.getTransformer();
    serializer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
    serializer.setOutputProperty(OutputKeys.INDENT, "yes");
    handler.setResult(result);

    JpaOrmAccumulator acc = new JpaOrmAccumulator(handler);

    XMLReader reader = XMLReaderFactory.createXMLReader();
    reader.setContentHandler(acc);

    for (final URL url : findXMLs(ORM_XML)) {
        reader.parse(new InputSource(url.openStream()));
    }

    String writerOut = writer.toString();
    String out = XML_HEADER + ENTITY_MAPPINGS_START + writerOut.substring(writerOut.indexOf("<entity "))
            + ENTITY_MAPPINGS_END;

    return out;
}