Example usage for javax.xml.stream.events XMLEvent getEventType

Introduction

In this page you can find the example usage for javax.xml.stream.events XMLEvent getEventType.

Prototype

public int getEventType();

Source Link

Document

Returns an integer code for this event.

Usage

From source file:org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor.java

private void expectTagEnd(String expected) throws IOException {
    XMLEvent ev = expectTag(expected, true);
    if (ev.getEventType() != XMLStreamConstants.END_ELEMENT) {
        throw new IOException("Expected tag end event for " + expected + ", but got: " + ev);
    }//from  w ww . ja  va 2s  .  c  om
    if (!expected.startsWith("[")) {
        String tag = ev.asEndElement().getName().getLocalPart();
        if (!tag.equals(expected)) {
            throw new IOException(
                    "Expected tag end event for " + expected + ", but got tag end event for " + tag);
        }
    }
}

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From source file:org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor.java

private void loadNodeChildrenHelper(Node parent, String expected, String terminators[]) throws IOException {
    XMLEvent ev = null;
    while (true) {
        try {/*from  www  . j  av a2s . c om*/
            ev = events.peek();
            switch (ev.getEventType()) {
            case XMLEvent.END_ELEMENT:
                if (terminators.length != 0) {
                    return;
                }
                events.nextEvent();
                return;
            case XMLEvent.START_ELEMENT:
                String key = ev.asStartElement().getName().getLocalPart();
                for (String terminator : terminators) {
                    if (terminator.equals(key)) {
                        return;
                    }
                }
                events.nextEvent();
                Node node = new Node();
                parent.addChild(key, node);
                loadNodeChildrenHelper(node, expected, new String[0]);
                break;
            case XMLEvent.CHARACTERS:
                String val = XMLUtils.unmangleXmlString(ev.asCharacters().getData(), true);
                parent.setVal(val);
                events.nextEvent();
                break;
            case XMLEvent.ATTRIBUTE:
                throw new IOException("Unexpected XML event " + ev);
            default:
                // Ignore other event types like comment, etc.
                if (LOG.isTraceEnabled()) {
                    LOG.trace("Skipping XMLEvent " + ev);
                }
                events.nextEvent();
                break;
            }
        } catch (XMLStreamException e) {
            throw new IOException("Expecting " + expected + ", but got XMLStreamException", e);
        }
    }
}

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From source file:org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor.java

/**
 * Processes the XML file back into an fsimage.
 *//* w w  w.j  ava2s  .  c  o  m*/
private void processXml() throws Exception {
    LOG.debug("Loading <fsimage>.");
    expectTag("fsimage", false);
    // Read the <version> tag.
    readVersion();
    // Write the HDFSIMG1 magic number which begins the fsimage file.
    out.write(FSImageUtil.MAGIC_HEADER);
    // Write a series of fsimage sections.
    sectionStartOffset = FSImageUtil.MAGIC_HEADER.length;
    final HashSet<String> unprocessedSections = new HashSet<>(sections.keySet());
    while (!unprocessedSections.isEmpty()) {
        XMLEvent ev = expectTag("[section header]", true);
        if (ev.getEventType() == XMLStreamConstants.END_ELEMENT) {
            if (ev.asEndElement().getName().getLocalPart().equals("fsimage")) {
                throw new IOException("FSImage XML ended prematurely, without " + "including section(s) "
                        + StringUtils.join(", ", unprocessedSections));
            }
            throw new IOException(
                    "Got unexpected tag end event for " + ev.asEndElement().getName().getLocalPart()
                            + " while looking " + "for section header tag.");
        } else if (ev.getEventType() != XMLStreamConstants.START_ELEMENT) {
            throw new IOException(
                    "Expected section header START_ELEMENT; " + "got event of type " + ev.getEventType());
        }
        String sectionName = ev.asStartElement().getName().getLocalPart();
        if (!unprocessedSections.contains(sectionName)) {
            throw new IOException("Unknown or duplicate section found for " + sectionName);
        }
        SectionProcessor sectionProcessor = sections.get(sectionName);
        if (sectionProcessor == null) {
            throw new IOException("Unknown FSImage section " + sectionName + ".  Valid section names are ["
                    + StringUtils.join(", ", sections.keySet()) + "]");
        }
        unprocessedSections.remove(sectionName);
        sectionProcessor.process();
    }

    // Write the StringTable section to disk.
    // This has to be done after the other sections, since some of them
    // add entries to the string table.
    writeStringTableSection();

    // Write the FileSummary section to disk.
    // This section is always last.
    long prevOffset = out.getCount();
    FileSummary fileSummary = fileSummaryBld.build();
    if (LOG.isDebugEnabled()) {
        LOG.debug("Writing FileSummary: {" + TextFormat.printToString(fileSummary) + "}");
    }
    // Even though the last 4 bytes of the file gives the FileSummary length,
    // we still write a varint first that also contains the length.
    fileSummary.writeDelimitedTo(out);

    // Write the length of the FileSummary section as a fixed-size big
    // endian 4-byte quantity.
    int summaryLen = Ints.checkedCast(out.getCount() - prevOffset);
    byte[] summaryLenBytes = new byte[4];
    ByteBuffer.wrap(summaryLenBytes).asIntBuffer().put(summaryLen);
    out.write(summaryLenBytes);
}

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From source file:org.apache.olingo.fit.utils.AbstractXMLUtilities.java

private void skipElement(final StartElement start, final XMLEventReader reader, final XMLEventWriter writer,
        final boolean excludeStart) throws Exception {

    if (!excludeStart) {
        writeEvent(start, writer);//  ww w.ja  va2  s.c  o m
    }

    int depth = 1;
    boolean found = false;

    while (reader.hasNext() && !found) {
        final XMLEvent event = reader.nextEvent();

        writeEvent(event, writer);

        if (event.getEventType() == XMLStreamConstants.START_ELEMENT) {
            depth++;
        } else if (event.getEventType() == XMLStreamConstants.END_ELEMENT) {
            depth--;
            found = depth == 0 && start.getName().equals(event.asEndElement().getName());
        }
    }
}

---

From source file:org.apache.olingo.fit.utils.AbstractXMLUtilities.java

public XmlElement getXmlElement(final StartElement start, final XMLEventReader reader) throws Exception {

    final XmlElement res = new XmlElement();
    res.setStart(start);/*www. j a  v a 2 s  .com*/

    StringWriter content = new StringWriter();

    int depth = 1;

    while (reader.hasNext() && depth > 0) {
        final XMLEvent event = reader.nextEvent();

        if (event.getEventType() == XMLStreamConstants.START_ELEMENT) {
            depth++;
        } else if (event.getEventType() == XMLStreamConstants.END_ELEMENT) {
            depth--;
        }

        if (depth == 0) {
            res.setEnd(event.asEndElement());
        } else {
            event.writeAsEncodedUnicode(content);
        }
    }

    content.flush();
    content.close();

    res.setContent(new ByteArrayInputStream(content.toString().getBytes()));

    return res;
}

---

From source file:org.apache.olingo.fit.utils.AbstractXMLUtilities.java

public Map.Entry<Integer, XmlElement> extractElement(final XMLEventReader reader, final XMLEventWriter writer,
        final List<String> path, final Collection<Map.Entry<String, String>> filter, final boolean filterInOr,
        final int startPathPos, final int minPathPos, final int maxPathPos) throws Exception {

    StartElement start = null;//from   w  w  w. j  a v a  2s  . c om
    int searchFor = 0;
    int depth = startPathPos;

    // Current inspected element
    String current = null;

    // set defaults
    final List<String> pathElementNames = path == null ? Collections.<String>emptyList() : path;
    final Collection<Map.Entry<String, String>> filterAttrs = filter == null
            ? Collections.<Map.Entry<String, String>>emptySet()
            : filter;

    while (reader.hasNext() && start == null) {
        final XMLEvent event = reader.nextEvent();

        if (event.getEventType() == XMLStreamConstants.START_ELEMENT) {
            depth++;

            if (current != null
                    || ((minPathPos < 0 || minPathPos <= depth) && (maxPathPos < 0 || depth <= maxPathPos))) {
                if (pathElementNames.isEmpty() || pathElementNames.get(searchFor).trim()
                        .equals(event.asStartElement().getName().getLocalPart())) {

                    if (searchFor < pathElementNames.size() - 1) {
                        // path exploring not completed
                        writeEvent(event, writer);
                        current = pathElementNames.get(searchFor).trim();
                        searchFor++;
                    } else {

                        // path exploring completed ... evaluate filter about path element name attribute
                        boolean match = filterAttrs.isEmpty() || !filterInOr;

                        for (Map.Entry<String, String> filterAttr : filterAttrs) {
                            final Attribute attr = event.asStartElement()
                                    .getAttributeByName(new QName(filterAttr.getKey().trim()));

                            if (attr == null || !filterAttr.getValue().trim().equals(attr.getValue())) {
                                match = filterInOr ? match : false;
                            } else {
                                match = filterInOr ? true : match;
                            }
                        }

                        if (match) {
                            // found searched element
                            start = event.asStartElement();
                        } else {
                            skipElement(event.asStartElement(), reader, writer, false);
                            depth--;
                        }
                    }
                } else if (current == null) {
                    writeEvent(event, writer);
                } else {
                    // skip element
                    skipElement(event.asStartElement(), reader, writer, false);
                    depth--;
                }
            } else {
                writeEvent(event, writer);
            }

        } else if (event.getEventType() == XMLStreamConstants.END_ELEMENT) {
            depth--;

            writeEvent(event, writer);

            if (event.asEndElement().getName().getLocalPart().equals(current)) {
                // back step ....
                searchFor--;
                current = searchFor > 0 ? pathElementNames.get(searchFor - 1).trim() : null;
            }
        } else {
            writeEvent(event, writer);
        }
    }

    if (start == null) {
        throw new NotFoundException();
    }

    return new SimpleEntry<Integer, XmlElement>(Integer.valueOf(depth - 1), getXmlElement(start, reader));
}

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From source file:org.apache.olingo.fit.utils.AbstractXMLUtilities.java

@Override
public InputStream selectEntity(final InputStream entity, final String[] propertyNames) throws Exception {
    final XMLEventReader reader = getEventReader(entity);

    final ByteArrayOutputStream bos = new ByteArrayOutputStream();
    final XMLEventWriter writer = getEventWriter(bos);

    final List<String> found = new ArrayList<String>(Arrays.asList(propertyNames));

    boolean inProperties = false;
    boolean writeCurrent = true;
    Boolean writeNext = null;//w w  w .  j  a  v a  2s  . c  o  m
    String currentName = null;

    final List<String> fieldToBeSaved = new ArrayList<String>(Arrays.asList(propertyNames));

    while (reader.hasNext()) {
        final XMLEvent event = reader.nextEvent();
        if (event.getEventType() == XMLStreamConstants.START_ELEMENT
                && LINK.equals(event.asStartElement().getName().getLocalPart())
                && !fieldToBeSaved
                        .contains(event.asStartElement().getAttributeByName(new QName("title")).getValue())
                && !"edit".equals(event.asStartElement().getAttributeByName(new QName("rel")).getValue())) {
            writeCurrent = false;
        } else if (event.getEventType() == XMLStreamConstants.END_ELEMENT
                && LINK.equals(event.asEndElement().getName().getLocalPart())) {
            writeNext = true;
        } else if (event.getEventType() == XMLStreamConstants.START_ELEMENT
                && (PROPERTIES).equals(event.asStartElement().getName().getLocalPart())) {
            writeCurrent = true;
            writeNext = false;
            inProperties = true;
        } else if (event.getEventType() == XMLStreamConstants.END_ELEMENT
                && (PROPERTIES).equals(event.asEndElement().getName().getLocalPart())) {
            writeCurrent = true;
        } else if (inProperties) {
            if (event.getEventType() == XMLStreamConstants.START_ELEMENT) {
                final String elementName = event.asStartElement().getName().getLocalPart();

                for (String propertyName : propertyNames) {
                    if ((ATOM_PROPERTY_PREFIX + propertyName.trim()).equals(elementName)) {
                        writeCurrent = true;
                        found.remove(propertyName);
                        currentName = propertyName;
                    }
                }

            } else if (event.getEventType() == XMLStreamConstants.END_ELEMENT
                    && StringUtils.isNotBlank(currentName) && (ATOM_PROPERTY_PREFIX + currentName.trim())
                            .equals(event.asEndElement().getName().getLocalPart())) {
                writeNext = false;
                currentName = null;
            }

        }

        if (writeCurrent) {
            writer.add(event);
        }

        if (writeNext != null) {
            writeCurrent = writeNext;
            writeNext = null;
        }
    }

    writer.flush();
    writer.close();
    reader.close();
    IOUtils.closeQuietly(entity);

    // Do not raise any exception in order to support FC properties as well
    // if (!found.isEmpty()) {
    //     throw new Exception(String.format("Could not find a properties '%s'", found));
    // }

    return new ByteArrayInputStream(bos.toByteArray());
}

---

From source file:org.apache.olingo.fit.utils.XMLUtilities.java

public XMLElement getXmlElement(final StartElement start, final XMLEventReader reader) throws Exception {

    final XMLElement res = new XMLElement();
    res.setStart(start);//from w  w  w .  j av a 2s  . c o m

    final Charset encoding = Charset.forName(org.apache.olingo.commons.api.Constants.UTF8);
    final ByteArrayOutputStream content = new ByteArrayOutputStream();
    final OutputStreamWriter writer = new OutputStreamWriter(content, encoding);

    int depth = 1;

    while (reader.hasNext() && depth > 0) {
        final XMLEvent event = reader.nextEvent();

        if (event.getEventType() == XMLStreamConstants.START_ELEMENT) {
            depth++;
        } else if (event.getEventType() == XMLStreamConstants.END_ELEMENT) {
            depth--;
        }

        if (depth == 0) {
            res.setEnd(event.asEndElement());
        } else {
            event.writeAsEncodedUnicode(writer);
        }
    }

    writer.flush();
    writer.close();

    res.setContent(new ByteArrayInputStream(content.toByteArray()));

    return res;
}

---

From source file:org.apache.olingo.fit.utils.XMLUtilities.java

public Map.Entry<Integer, XMLElement> extractElement(final XMLEventReader reader, final XMLEventWriter writer,
        final List<String> path, final Collection<Map.Entry<String, String>> filter, final boolean filterInOr,
        final int startPathPos, final int minPathPos, final int maxPathPos) throws Exception {

    StartElement start = null;//from  www.j  av a2  s  . c  o  m
    int searchFor = 0;
    int depth = startPathPos;

    // Current inspected element
    String current = null;

    // set defaults
    final List<String> pathElementNames = path == null ? Collections.<String>emptyList() : path;
    final Collection<Map.Entry<String, String>> filterAttrs = filter == null
            ? Collections.<Map.Entry<String, String>>emptySet()
            : filter;

    while (reader.hasNext() && start == null) {
        final XMLEvent event = reader.nextEvent();

        if (event.getEventType() == XMLStreamConstants.START_ELEMENT) {
            depth++;

            if (current != null
                    || ((minPathPos < 0 || minPathPos <= depth) && (maxPathPos < 0 || depth <= maxPathPos))) {
                if (pathElementNames.isEmpty() || pathElementNames.get(searchFor).trim()
                        .equals(event.asStartElement().getName().getLocalPart())) {

                    if (searchFor < pathElementNames.size() - 1) {
                        // path exploring not completed
                        writeEvent(event, writer);
                        current = pathElementNames.get(searchFor).trim();
                        searchFor++;
                    } else {

                        // path exploring completed ... evaluate filter about path element name attribute
                        boolean match = filterAttrs.isEmpty() || !filterInOr;

                        for (Map.Entry<String, String> filterAttr : filterAttrs) {
                            final Attribute attr = event.asStartElement()
                                    .getAttributeByName(new QName(filterAttr.getKey().trim()));

                            if (attr == null || !filterAttr.getValue().trim().equals(attr.getValue())) {
                                match = filterInOr ? match : false;
                            } else {
                                match = filterInOr ? true : match;
                            }
                        }

                        if (match) {
                            // found searched element
                            start = event.asStartElement();
                        } else {
                            skipElement(event.asStartElement(), reader, writer, false);
                            depth--;
                        }
                    }
                } else if (current == null) {
                    writeEvent(event, writer);
                } else {
                    // skip element
                    skipElement(event.asStartElement(), reader, writer, false);
                    depth--;
                }
            } else {
                writeEvent(event, writer);
            }

        } else if (event.getEventType() == XMLStreamConstants.END_ELEMENT) {
            depth--;

            writeEvent(event, writer);

            if (event.asEndElement().getName().getLocalPart().equals(current)) {
                // back step ....
                searchFor--;
                current = searchFor > 0 ? pathElementNames.get(searchFor - 1).trim() : null;
            }
        } else {
            writeEvent(event, writer);
        }
    }

    if (start == null) {
        throw new NotFoundException();
    }

    return new SimpleEntry<Integer, XMLElement>(Integer.valueOf(depth - 1), getXmlElement(start, reader));
}

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From source file:org.apache.olingo.fit.utils.XMLUtilities.java

@Override
public InputStream selectEntity(final InputStream entity, final String[] propertyNames) throws Exception {
    final XMLEventReader reader = getEventReader(entity);

    final ByteArrayOutputStream bos = new ByteArrayOutputStream();
    final XMLEventWriter writer = getEventWriter(bos);

    final List<String> found = new ArrayList<String>(Arrays.asList(propertyNames));

    boolean inProperties = false;
    boolean writeCurrent = true;
    Boolean writeNext = null;/*from   w  w  w .  ja v a2 s  .  c o  m*/
    String currentName = null;

    final List<String> fieldToBeSaved = new ArrayList<String>(Arrays.asList(propertyNames));

    while (reader.hasNext()) {
        final XMLEvent event = reader.nextEvent();
        if (event.getEventType() == XMLStreamConstants.START_ELEMENT
                && Constants.get(ConstantKey.LINK).equals(event.asStartElement().getName().getLocalPart())
                && !fieldToBeSaved
                        .contains(event.asStartElement().getAttributeByName(new QName("title")).getValue())
                && !"edit".equals(event.asStartElement().getAttributeByName(new QName("rel")).getValue())) {
            writeCurrent = false;
        } else if (event.getEventType() == XMLStreamConstants.END_ELEMENT
                && Constants.get(ConstantKey.LINK).equals(event.asEndElement().getName().getLocalPart())) {
            writeNext = true;
        } else if (event.getEventType() == XMLStreamConstants.START_ELEMENT
                && (Constants.get(ConstantKey.PROPERTIES))
                        .equals(event.asStartElement().getName().getLocalPart())) {
            writeCurrent = true;
            writeNext = false;
            inProperties = true;
        } else if (event.getEventType() == XMLStreamConstants.END_ELEMENT
                && (Constants.get(ConstantKey.PROPERTIES))
                        .equals(event.asEndElement().getName().getLocalPart())) {
            writeCurrent = true;
        } else if (inProperties) {
            if (event.getEventType() == XMLStreamConstants.START_ELEMENT) {
                final String elementName = event.asStartElement().getName().getLocalPart();

                for (String propertyName : propertyNames) {
                    if ((Constants.get(ConstantKey.ATOM_PROPERTY_PREFIX) + propertyName.trim())
                            .equals(elementName)) {
                        writeCurrent = true;
                        found.remove(propertyName);
                        currentName = propertyName;
                    }
                }

            } else if (event.getEventType() == XMLStreamConstants.END_ELEMENT
                    && StringUtils.isNotBlank(currentName)
                    && (Constants.get(ConstantKey.ATOM_PROPERTY_PREFIX) + currentName.trim())
                            .equals(event.asEndElement().getName().getLocalPart())) {
                writeNext = false;
                currentName = null;
            }

        }

        if (writeCurrent) {
            writer.add(event);
        }

        if (writeNext != null) {
            writeCurrent = writeNext;
            writeNext = null;
        }
    }

    writer.flush();
    writer.close();
    reader.close();
    IOUtils.closeQuietly(entity);

    // Do not raise any exception in order to support FC properties as well
    // if (!found.isEmpty()) {
    // throw new Exception(String.format("Could not find a properties '%s'", found));
    // }
    return new ByteArrayInputStream(bos.toByteArray());
}

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