Example usage for javax.xml.stream XMLEventReader close

List of usage examples for javax.xml.stream XMLEventReader close

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Introduction

In this page you can find the example usage for javax.xml.stream XMLEventReader close.

Prototype

public void close() throws XMLStreamException;

Source Link

Document

Frees any resources associated with this Reader.

Usage

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;//from  www . j  ava2s.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.AbstractXMLUtilities.java

@Override
public Map<String, InputStream> getChanges(final InputStream src) throws Exception {
    final Map<String, InputStream> res = new HashMap<String, InputStream>();

    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    IOUtils.copy(src, bos);/* ww w .  j av a 2s .c om*/
    IOUtils.closeQuietly(src);

    // retrieve properties ...
    XMLEventReader reader = getEventReader(new ByteArrayInputStream(bos.toByteArray()));

    final Map.Entry<Integer, XmlElement> propertyElement = extractElement(reader, null,
            Collections.<String>singletonList(PROPERTIES), 0, 2, 3);
    reader.close();

    reader = propertyElement.getValue().getContentReader();

    try {
        while (true) {
            final XmlElement property = extractElement(reader, null, null, 0, -1, -1).getValue();
            res.put(property.getStart().getName().getLocalPart(), property.toStream());
        }
    } catch (Exception ignore) {
        // end
    }

    reader.close();

    // retrieve links ...
    reader = getEventReader(new ByteArrayInputStream(bos.toByteArray()));

    try {
        int pos = 0;
        while (true) {
            final Map.Entry<Integer, XmlElement> linkElement = extractElement(reader, null,
                    Collections.<String>singletonList(LINK), pos, 2, 2);

            res.put("[LINK]"
                    + linkElement.getValue().getStart().getAttributeByName(new QName("title")).getValue(),
                    linkElement.getValue().toStream());

            pos = linkElement.getKey();
        }
    } catch (Exception ignore) {
        // end
    }

    return res;
}

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

@Override
public InputStream setChanges(final InputStream toBeChanged, final Map<String, InputStream> properties)
        throws Exception {
    XMLEventReader reader = getEventReader(toBeChanged);

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

    // ---------------------------------
    // add property changes
    // ---------------------------------
    Map.Entry<Integer, XmlElement> propertyElement = extractElement(reader, writer,
            Collections.<String>singletonList(PROPERTIES), 0, 2, 3);

    writer.flush();/*  w w  w . j ava2 s  .com*/

    ByteArrayOutputStream pbos = new ByteArrayOutputStream();
    OutputStreamWriter pwriter = new OutputStreamWriter(pbos);

    final XMLEventReader propertyReader = propertyElement.getValue().getContentReader();

    try {
        while (true) {
            final XmlElement property = extractElement(propertyReader, null, null, 0, -1, -1).getValue();
            final String name = property.getStart().getName().getLocalPart();

            if (properties.containsKey(name)) {
                // replace
                final InputStream replacement = properties.get(name);
                properties.remove(property.getStart().getName().getLocalPart());
                pwriter.append(IOUtils.toString(replacement));
                IOUtils.closeQuietly(replacement);
            } else {
                pwriter.append(IOUtils.toString(property.toStream()));
            }
        }
    } catch (Exception ignore) {
        // end
    }

    for (Map.Entry<String, InputStream> remains : properties.entrySet()) {
        if (!remains.getKey().startsWith("[LINK]")) {
            pwriter.append(IOUtils.toString(remains.getValue()));
            IOUtils.closeQuietly(remains.getValue());
        }
    }

    pwriter.flush();
    pwriter.close();

    writer.add(propertyElement.getValue().getStart());
    writer.add(new XMLEventReaderWrapper(new ByteArrayInputStream(pbos.toByteArray())));
    writer.add(propertyElement.getValue().getEnd());

    IOUtils.closeQuietly(pbos);

    writer.add(reader);
    reader.close();
    writer.flush();
    writer.close();
    // ---------------------------------

    // ---------------------------------
    // add navigationm changes
    // ---------------------------------

    // remove existent links
    for (Map.Entry<String, InputStream> remains : properties.entrySet()) {

        if (remains.getKey().startsWith("[LINK]")) {
            reader = getEventReader(new ByteArrayInputStream(bos.toByteArray()));

            bos.reset();
            writer = getEventWriter(bos);

            try {
                final String linkName = remains.getKey().substring(remains.getKey().indexOf("]") + 1);

                extractElement(reader, writer, Collections.<String>singletonList(LINK),
                        Collections.<Map.Entry<String, String>>singleton(
                                new SimpleEntry<String, String>("title", linkName)),
                        false, 0, 2, 2);

                writer.add(reader);

            } catch (Exception ignore) {
                // ignore
            }

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

    reader = getEventReader(new ByteArrayInputStream(bos.toByteArray()));

    bos.reset();
    writer = getEventWriter(bos);

    propertyElement = extractElement(reader, writer, Collections.<String>singletonList(CONTENT), 0, 2, 2);
    writer.flush();

    pbos.reset();
    pwriter = new OutputStreamWriter(pbos);

    for (Map.Entry<String, InputStream> remains : properties.entrySet()) {
        if (remains.getKey().startsWith("[LINK]")) {
            pwriter.append(IOUtils.toString(remains.getValue()));
            IOUtils.closeQuietly(remains.getValue());
        }
    }

    pwriter.flush();
    pwriter.close();

    writer.add(new XMLEventReaderWrapper(new ByteArrayInputStream(pbos.toByteArray())));
    IOUtils.closeQuietly(pbos);

    writer.add(propertyElement.getValue().getStart());
    writer.add(propertyElement.getValue().getContentReader());
    writer.add(propertyElement.getValue().getEnd());

    writer.add(reader);
    reader.close();
    writer.flush();
    writer.close();
    // ---------------------------------

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

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

@Override
protected InputStream replaceLink(final InputStream toBeChanged, final String linkName,
        final InputStream replacement) throws Exception {
    final XMLEventReader reader = getEventReader(toBeChanged);

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

    final XMLEventFactory eventFactory = XMLEventFactory.newInstance();
    XMLEvent newLine = eventFactory.createSpace("\n");

    try {//ww  w .j  av a 2s  . c o m
        final XmlElement linkElement = extractElement(reader, writer, Collections.<String>singletonList(LINK),
                Collections.<Map.Entry<String, String>>singletonList(
                        new SimpleEntry<String, String>("title", linkName)),
                false, 0, -1, -1).getValue();
        writer.add(linkElement.getStart());

        // ------------------------------------------
        // write inline ...
        // ------------------------------------------
        writer.add(newLine);
        writer.add(eventFactory.createStartElement("m", null, "inline"));

        addAtomElement(replacement, writer);

        writer.add(eventFactory.createEndElement("m", null, "inline"));
        writer.add(newLine);
        // ------------------------------------------

        writer.add(linkElement.getEnd());

        writer.add(reader);
        writer.flush();
        writer.close();
    } finally {
        reader.close();
        IOUtils.closeQuietly(toBeChanged);
    }

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

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

@Override
public Map.Entry<String, List<String>> extractLinkURIs(final InputStream is) throws Exception {
    final ByteArrayOutputStream bos = new ByteArrayOutputStream();
    IOUtils.copy(is, bos);//from  ww w.j a  v a2s.co  m
    IOUtils.closeQuietly(is);

    XMLEventReader reader = getEventReader(new ByteArrayInputStream(bos.toByteArray()));
    final List<String> links = new ArrayList<String>();
    try {
        while (true) {
            links.add(IOUtils
                    .toString(extractElement(reader, null, Collections.<String>singletonList("uri"), 0, -1, -1)
                            .getValue().getContent()));
        }
    } catch (Exception ignore) {
        // End document reached ...
    }
    reader.close();

    String next;

    reader = getEventReader(new ByteArrayInputStream(bos.toByteArray()));
    try {
        next = IOUtils
                .toString(extractElement(reader, null, Collections.<String>singletonList("next"), 0, -1, -1)
                        .getValue().getContent());
    } catch (Exception ignore) {
        // next link is not mandatory
        next = null;
    }
    reader.close();

    return new AbstractMap.SimpleEntry<String, List<String>>(next, links);
}

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

@Override
public InputStream getProperty(final String entitySetName, final String entityId, final List<String> path,
        final String edmType) throws Exception {
    final List<String> pathElements = new ArrayList<String>();

    for (String element : path) {
        pathElements.add(ATOM_PROPERTY_PREFIX + element);
    }// w  w  w.  j ava2  s . com

    final InputStream src = fsManager.readFile(Commons.getEntityBasePath(entitySetName, entityId) + ENTITY,
            Accept.XML);

    final XMLEventReader reader = getEventReader(src);
    final XmlElement property = extractElement(reader, null, pathElements, 0, 3, 4).getValue();

    reader.close();
    IOUtils.closeQuietly(src);

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

    final XMLEventFactory eventFactory = XMLEventFactory.newInstance();
    writer.add(eventFactory.createStartDocument("UTF-8", "1.0"));
    writer.add(property.getStart());

    if (property.getStart().getAttributeByName(new QName(ATOM_DATASERVICE_NS)) == null) {
        writer.add(eventFactory.createNamespace(ATOM_PROPERTY_PREFIX.substring(0, 1), DATASERVICES_NS));
    }
    if (property.getStart().getAttributeByName(new QName(ATOM_METADATA_NS)) == null) {
        writer.add(eventFactory.createNamespace(ATOM_METADATA_PREFIX.substring(0, 1), METADATA_NS));
    }

    writer.add(property.getContentReader());
    writer.add(property.getEnd());

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

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

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

@Override
public InputStream replaceProperty(final InputStream src, final InputStream replacement,
        final List<String> path, final boolean justValue) throws Exception {

    final List<String> pathElements = new ArrayList<String>();

    for (String element : path) {
        pathElements.add(ATOM_PROPERTY_PREFIX + element);
    }//from  w w w. j av  a2 s.  c o m

    final XMLEventReader reader = getEventReader(src);

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

    final Map.Entry<Integer, XmlElement> element = extractElement(reader, writer, pathElements, 0, 3, 4);

    if (justValue) {
        writer.add(element.getValue().getStart());
    }

    final XMLEventReader changesReader = new XMLEventReaderWrapper(replacement);

    writer.add(changesReader);
    changesReader.close();
    IOUtils.closeQuietly(replacement);

    if (justValue) {
        writer.add(element.getValue().getEnd());
    }

    writer.add(reader);

    reader.close();
    IOUtils.closeQuietly(src);

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

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

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

@Override
public InputStream deleteProperty(final InputStream src, final List<String> path) throws Exception {

    final List<String> pathElements = new ArrayList<String>();

    for (String element : path) {
        pathElements.add(ATOM_PROPERTY_PREFIX + element);
    }/* w  w w .  ja v  a2s  .  co m*/

    final XMLEventReader reader = getEventReader(src);

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

    final Map.Entry<Integer, XmlElement> element = extractElement(reader, writer, pathElements, 0, 3, 4);

    final XMLEventReader changesReader = new XMLEventReaderWrapper(
            IOUtils.toInputStream(String.format("<%s m:null=\"true\" />", path.get(path.size() - 1))));

    writer.add(changesReader);
    changesReader.close();

    writer.add(reader);

    reader.close();
    IOUtils.closeQuietly(src);

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

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

From source file:org.apache.olingo.fit.utils.v3.XMLUtilities.java

@Override
public void retrieveLinkInfoFromMetadata() throws Exception {

    final MetadataLinkInfo metadataLinkInfo = new MetadataLinkInfo();
    Commons.getLinkInfo().put(version, metadataLinkInfo);

    final InputStream metadata = fsManager.readFile(Constants.METADATA, Accept.XML);
    final XMLEventReader reader = getEventReader(metadata);

    try {//from   w  w w  . j  a v  a  2s  .  co m
        while (true) {
            final Map.Entry<Integer, XmlElement> entitySetElement = extractElement(reader, null,
                    Collections.<String>singletonList("EntitySet"), null, false, 0, -1, -1);

            retrieveLinks(entitySetElement.getValue(), metadataLinkInfo);
        }
    } catch (Exception e) {
    } finally {
        reader.close();
    }
}

From source file:org.apache.olingo.fit.utils.v3.XMLUtilities.java

private void retrieveLinks(final XmlElement entitySetElement, final MetadataLinkInfo metadataLinkInfo)
        throws Exception {

    final InputStream metadata = fsManager.readFile(Constants.METADATA, Accept.XML);

    final ByteArrayOutputStream bos = new ByteArrayOutputStream();
    IOUtils.copy(metadata, bos);//from ww w .j  av  a 2s .  com
    IOUtils.closeQuietly(metadata);

    final String entitySetName = entitySetElement.getStart().getAttributeByName(new QName("Name")).getValue()
            .trim();
    final String entityType = entitySetElement.getStart().getAttributeByName(new QName("EntityType")).getValue()
            .trim();

    final Collection<Map.Entry<String, String>> filter = new HashSet<Map.Entry<String, String>>();
    filter.add(new SimpleEntry<String, String>("Name",
            entityType.substring(entityType.lastIndexOf(".") + 1, entityType.length())));
    filter.add(new SimpleEntry<String, String>("BaseType", entityType));

    final XMLEventReader reader = getEventReader(new ByteArrayInputStream(bos.toByteArray()));

    final Map.Entry<Integer, XmlElement> entityTypeElement = extractElement(reader, null,
            Collections.<String>singletonList("EntityType"), filter, true, 0, -1, -1);

    final XMLEventReader entityReader = entityTypeElement.getValue().getContentReader();
    int size = 0;

    try {
        while (true) {
            final XmlElement navProperty = extractElement(entityReader, null,
                    Collections.<String>singletonList("NavigationProperty"), null, false, 0, -1, -1).getValue();

            final String linkName = navProperty.getStart().getAttributeByName(new QName("Name")).getValue();
            final Map.Entry<String, Boolean> target = getTargetInfo(navProperty.getStart(), linkName);

            metadataLinkInfo.addLink(entitySetName, linkName, target.getKey(), target.getValue());

            size++;
        }
    } catch (Exception e) {
    } finally {
        entityReader.close();
    }

    if (size == 0) {
        metadataLinkInfo.addEntitySet(entitySetName);
    }
}