Example usage for javax.xml.stream XMLEventReader close

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.v3.XMLUtilities.java

private Map.Entry<String, Boolean> getTargetInfo(final StartElement element, final String linkName)
        throws Exception {
    final InputStream metadata = fsManager.readFile(Constants.METADATA, Accept.XML);

    final ByteArrayOutputStream bos = new ByteArrayOutputStream();
    IOUtils.copy(metadata, bos);//from www . j a  va2s  .c  om
    IOUtils.closeQuietly(metadata);

    // ------------------------------------
    // Retrieve association
    // ------------------------------------
    XMLEventReader reader = getEventReader(new ByteArrayInputStream(bos.toByteArray()));

    final String associationName = element.getAttributeByName(new QName("Relationship")).getValue();

    final Map.Entry<Integer, XmlElement> association = extractElement(reader, null,
            Collections.<String>singletonList("Association"),
            Collections.<Map.Entry<String, String>>singleton(new SimpleEntry<String, String>("Name",
                    associationName.substring(associationName.lastIndexOf(".") + 1))),
            false, 0, 4, 4);

    reader.close();
    // ------------------------------------

    // ------------------------------------
    // check for feed or not from Association role
    // ------------------------------------
    InputStream associationContent = association.getValue().toStream();
    reader = getEventReader(associationContent);

    Map.Entry<Integer, XmlElement> associationEnd = extractElement(reader, null,
            Collections.<String>singletonList("End"),
            Collections.<Map.Entry<String, String>>singleton(new SimpleEntry<String, String>("Role", linkName)),
            false, 0, -1, -1);

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

    final boolean feed = associationEnd.getValue().getStart().getAttributeByName(new QName("Multiplicity"))
            .getValue().equals("*");
    // ------------------------------------

    // ------------------------------------
    // Retrieve target association set name
    // ------------------------------------
    reader = getEventReader(new ByteArrayInputStream(bos.toByteArray()));

    final Map.Entry<Integer, XmlElement> associationSet = extractElement(reader, null,
            Collections.<String>singletonList("AssociationSet"),
            Collections.<Map.Entry<String, String>>singleton(
                    new SimpleEntry<String, String>("Association", associationName)),
            false, 0, -1, -1);

    reader.close();

    associationContent = associationSet.getValue().toStream();
    reader = getEventReader(associationContent);

    associationEnd = extractElement(reader, null, Collections.<String>singletonList("End"),
            Collections.<Map.Entry<String, String>>singleton(new SimpleEntry<String, String>("Role", linkName)),
            false, 0, -1, -1);

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

    final String target = associationEnd.getValue().getStart().getAttributeByName(new QName("EntitySet"))
            .getValue();
    // ------------------------------------

    return new SimpleEntry<String, Boolean>(target, feed);
}

---

From source file:org.apache.olingo.fit.utils.v4.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 ByteArrayOutputStream bos = new ByteArrayOutputStream();
    IOUtils.copy(metadata, bos);/*from   w ww .  j av a 2 s .co m*/
    IOUtils.closeQuietly(metadata);

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

    final Set<String> singletons = new HashSet<String>();

    try {
        while (true) {
            final Map.Entry<Integer, XmlElement> entitySetElement = extractElement(reader, null,
                    Collections.<String>singletonList("Singleton"), null, false, 0, -1, -1);

            final String entitySetName = entitySetElement.getValue().getStart()
                    .getAttributeByName(new QName("Name")).getValue().trim();
            singletons.add(entitySetName);
        }
    } catch (Exception e) {
    } finally {
        reader.close();
    }

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

    try {
        while (true) {
            final Map.Entry<Integer, XmlElement> entitySetElement = extractElement(reader, null,
                    Collections.<String>singletonList("EntitySet"), null, false, 0, -1, -1);

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

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

    try {
        while (true) {
            final Map.Entry<Integer, XmlElement> entitySetElement = extractElement(reader, null,
                    Collections.<String>singletonList("Singleton"), null, false, 0, -1, -1);

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

---

From source file:org.apache.olingo.fit.utils.v4.XMLUtilities.java

private void retrieveLinks(final XmlElement entitySetElement, final MetadataLinkInfo metadataLinkInfo,
        final Set<String> singletons) throws Exception {

    final String entitySetName = entitySetElement.getStart().getAttributeByName(new QName("Name")).getValue()
            .trim();/* w w w  .j a v a  2 s  .  c  o  m*/

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

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

            final String linkName = navProperty.getStart().getAttributeByName(new QName("Path")).getValue();
            final String target = navProperty.getStart().getAttributeByName(new QName("Target")).getValue();
            final boolean feed = !singletons.contains(target);

            metadataLinkInfo.addLink(entitySetName, linkName, target, feed);

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

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

---

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

/**
 * {@inheritDoc }// ww  w  . ja v a 2 s  . c  om
 */
@Override
protected InputStream addLinks(final String entitySetName, final String entitykey, final InputStream is,
        final Set<String> links) throws Exception {

    // -----------------------------------------
    // 0. Build reader and writer
    // -----------------------------------------
    final XMLEventReader reader = getEventReader(is);
    final XMLEventFactory eventFactory = XMLEventFactory.newInstance();

    final ByteArrayOutputStream bos = new ByteArrayOutputStream();
    final XMLEventWriter writer = getEventWriter(bos);
    // -----------------------------------------
    final Map.Entry<Integer, XMLElement> entry = extractElement(reader, writer,
            Collections.singletonList("entry"), 0, 1, 1);

    writer.add(entry.getValue().getStart());

    final Map<String, NavigationProperty> navigationProperties = metadata
            .getNavigationProperties(entitySetName);

    // add for links
    for (String link : links) {
        final Set<Attribute> attributes = new HashSet<Attribute>();
        attributes.add(eventFactory.createAttribute(new QName("title"), link));
        attributes.add(eventFactory.createAttribute(new QName("href"),
                Commons.getLinksURI(entitySetName, entitykey, link)));
        attributes.add(eventFactory.createAttribute(new QName("rel"),
                Constants.get(ConstantKey.ATOM_LINK_REL) + link));
        attributes.add(eventFactory.createAttribute(new QName("type"),
                navigationProperties.get(link).isEntitySet() ? Constants.get(ConstantKey.ATOM_LINK_FEED)
                        : Constants.get(ConstantKey.ATOM_LINK_ENTRY)));

        writer.add(eventFactory.createStartElement(new QName(Constants.get(ConstantKey.LINK)),
                attributes.iterator(), null));
        writer.add(eventFactory.createEndElement(new QName(Constants.get(ConstantKey.LINK)), null));
    }

    writer.add(entry.getValue().getContentReader());
    writer.add(entry.getValue().getEnd());
    writer.add(reader);
    IOUtils.closeQuietly(is);

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

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

---

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

/**
 * {@inheritDoc }/*from  ww  w .j  a va2 s  .  c  o m*/
 */
@Override
protected Set<String> retrieveAllLinkNames(final InputStream is) throws Exception {
    final Set<String> links = new HashSet<String>();

    final XMLEventReader reader = getEventReader(is);

    try {

        int startDepth = 0;

        while (true) {
            final Map.Entry<Integer, XMLElement> linkInfo = extractElement(reader, null,
                    Collections.<String>singletonList(Constants.get(ConstantKey.LINK)), startDepth, 2, 2);

            startDepth = linkInfo.getKey();

            links.add(linkInfo.getValue().getStart().getAttributeByName(new QName("title")).getValue());
        }
    } catch (Exception ignore) {
        // ignore
    } finally {
        reader.close();
        IOUtils.closeQuietly(is);
    }

    return links;
}

---

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

/**
 * {@inheritDoc }/*from w w  w.j  a va2 s. co  m*/
 */
@Override
protected NavigationLinks retrieveNavigationInfo(final String entitySetName, final InputStream is)
        throws Exception {

    final NavigationLinks links = new NavigationLinks();

    final XMLEventReader reader = getEventReader(is);

    try {
        final List<Map.Entry<String, String>> filter = new ArrayList<Map.Entry<String, String>>();
        filter.add(new AbstractMap.SimpleEntry<String, String>("type", "application/atom+xml;type=entry"));
        filter.add(new AbstractMap.SimpleEntry<String, String>("type", "application/atom+xml;type=feed"));

        int startDepth = 0;

        while (true) {
            // a. search for link with type attribute equals to "application/atom+xml;type=entry/feed"
            final Map.Entry<Integer, XMLElement> linkInfo = extractElement(reader, null,
                    Collections.<String>singletonList(Constants.get(ConstantKey.LINK)), filter, true,
                    startDepth, 2, 2);
            final XMLElement link = linkInfo.getValue();
            startDepth = linkInfo.getKey();

            final String title = link.getStart().getAttributeByName(new QName("title")).getValue();

            final Attribute hrefAttr = link.getStart().getAttributeByName(new QName("href"));
            final String href = hrefAttr == null ? null : hrefAttr.getValue();

            try {
                final XMLElement inlineElement = extractElement(link.getContentReader(), null,
                        Collections.<String>singletonList(Constants.get(ConstantKey.INLINE)), 0, -1, -1)
                                .getValue();
                final XMLEventReader inlineReader = inlineElement.getContentReader();

                try {
                    while (true) {
                        final XMLElement entry = extractElement(inlineReader, null,
                                Collections.<String>singletonList("entry"), 0, -1, -1).getValue();
                        links.addInlines(title, entry.toStream());
                    }
                } catch (Exception e) {
                    // Reached the end of document
                }

                inlineReader.close();
            } catch (Exception ignore) {
                // inline element not found (inlines are not mondatory).
                if (StringUtils.isNotBlank(href) && ENTITY_URI_PATTERN.matcher(href).matches()) {
                    links.addLinks(title, href.substring(href.lastIndexOf('/') + 1));
                }
            }
        }
    } catch (Exception ignore) {
        // ignore
    } finally {
        reader.close();
    }

    return links;
}

---

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

/**
 * {@inheritDoc }/*  w  w w.  j a  v  a  2s .c  o  m*/
 */
@Override
protected InputStream normalizeLinks(final String entitySetName, final String entityKey, final InputStream is,
        final NavigationLinks links) throws Exception {

    // -----------------------------------------
    // 0. Build reader and writer
    // -----------------------------------------
    final ByteArrayOutputStream bos = new ByteArrayOutputStream();
    IOUtils.copy(is, bos);
    is.close();

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

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

    // -----------------------------------------
    // 1. Normalize links
    // -----------------------------------------
    final Set<String> added = new HashSet<String>();

    try {
        final List<Map.Entry<String, String>> filter = new ArrayList<Map.Entry<String, String>>();
        filter.add(new AbstractMap.SimpleEntry<String, String>("type", "application/atom+xml;type=entry"));
        filter.add(new AbstractMap.SimpleEntry<String, String>("type", "application/atom+xml;type=feed"));

        Map.Entry<Integer, XMLElement> linkInfo = null;

        while (true) {
            // a. search for link with type attribute equals to "application/atom+xml;type=entry/feed"
            linkInfo = extractElement(reader, writer,
                    Collections.<String>singletonList(Constants.get(ConstantKey.LINK)), filter, true,
                    linkInfo == null ? 0 : linkInfo.getKey(), 2, 2);
            final XMLElement link = linkInfo.getValue();

            final String title = link.getStart().getAttributeByName(new QName("title")).getValue();

            if (!added.contains(title)) {
                added.add(title);

                final String normalizedLink = String.format(
                        "<link href=\"%s(%s)/%s\" rel=\"%s\" title=\"%s\" type=\"%s\"/>", entitySetName,
                        entityKey, title, link.getStart().getAttributeByName(new QName("rel")).getValue(),
                        title, link.getStart().getAttributeByName(new QName("type")).getValue());

                addAtomElement(IOUtils.toInputStream(normalizedLink, Constants.ENCODING), writer);
            }
        }
    } catch (Exception ignore) {
        // ignore
    } finally {
        writer.close();
        reader.close();
    }
    // -----------------------------------------

    // -----------------------------------------
    // 2. Add/replace edit link
    // -----------------------------------------
    final InputStream content = addEditLink(new ByteArrayInputStream(tmpBos.toByteArray()), entitySetName,
            Constants.get(ConstantKey.DEFAULT_SERVICE_URL) + entitySetName + "(" + entityKey + ")");
    // -----------------------------------------

    // -----------------------------------------
    // 3. Add content element if missing
    // -----------------------------------------
    return addAtomContent(content, entitySetName,
            Constants.get(ConstantKey.DEFAULT_SERVICE_URL) + entitySetName + "(" + entityKey + ")");
    // -----------------------------------------

}

---

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

@Override
public InputStream addEditLink(final InputStream content, final String title, final String href)
        throws Exception {

    final ByteArrayOutputStream copy = new ByteArrayOutputStream();
    IOUtils.copy(content, copy);/*from   w  w  w. ja v  a  2  s.c o  m*/
    IOUtils.closeQuietly(content);

    XMLEventReader reader = getEventReader(new ByteArrayInputStream(copy.toByteArray()));

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

    final String editLinkElement = String.format("<link rel=\"edit\" title=\"%s\" href=\"%s\" />", title, href);

    try {
        // check edit link existence
        extractElement(reader, writer, Collections.<String>singletonList(Constants.get(ConstantKey.LINK)),
                Collections.<Map.Entry<String, String>>singletonList(
                        new AbstractMap.SimpleEntry<String, String>("rel", "edit")),
                false, 0, -1, -1);

        addAtomElement(IOUtils.toInputStream(editLinkElement, Constants.ENCODING), writer);
        writer.add(reader);

    } catch (Exception e) {
        reader.close();
        reader = getEventReader(new ByteArrayInputStream(copy.toByteArray()));

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

        final XMLElement entryElement = extractElement(reader, writer,
                Collections.<String>singletonList("entry"), 0, 1, 1).getValue();

        writer.add(entryElement.getStart());

        addAtomElement(IOUtils.toInputStream(editLinkElement, Constants.ENCODING), writer);

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

        writer.add(reader);

        writer.flush();
        writer.close();
    } finally {
        reader.close();
    }

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

---

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

private InputStream addAtomContent(final InputStream content, final String title, final String href)
        throws Exception {

    final ByteArrayOutputStream copy = new ByteArrayOutputStream();
    IOUtils.copy(content, copy);/* w  w w .ja  v  a2 s  .  c  o  m*/

    IOUtils.closeQuietly(content);

    XMLEventReader reader = getEventReader(new ByteArrayInputStream(copy.toByteArray()));

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

    try {
        // check edit link existence
        XMLElement contentElement = extractElement(reader, writer, Collections.<String>singletonList("content"),
                0, 2, 2).getValue();
        writer.add(contentElement.getStart());
        writer.add(contentElement.getContentReader());
        writer.add(contentElement.getEnd());
        writer.add(reader);
    } catch (Exception e) {
        reader.close();
        reader = getEventReader(new ByteArrayInputStream(copy.toByteArray()));

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

        if (isMediaContent(title)) {
            final XMLElement entryElement = extractElement(reader, writer,
                    Collections.<String>singletonList("entry"), 0, 1, 1).getValue();

            writer.add(entryElement.getStart());
            writer.add(entryElement.getContentReader());

            addAtomElement(
                    IOUtils.toInputStream(String.format("<content type=\"*/*\" src=\"%s/$value\" />", href)),
                    writer);

            writer.add(entryElement.getEnd());
        } else {
            try {
                final XMLElement entryElement = extractElement(reader, writer,
                        Collections.<String>singletonList(Constants.get(ConstantKey.PROPERTIES)), 0, 2, 3)
                                .getValue();

                addAtomElement(IOUtils.toInputStream("<content type=\"application/xml\">"), writer);

                writer.add(entryElement.getStart());
                writer.add(entryElement.getContentReader());
                writer.add(entryElement.getEnd());

                addAtomElement(IOUtils.toInputStream("</content>"), writer);
            } catch (Exception nf) {
                reader.close();
                reader = getEventReader(new ByteArrayInputStream(copy.toByteArray()));

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

                final XMLElement entryElement = extractElement(reader, writer,
                        Collections.<String>singletonList("entry"), 0, 1, 1).getValue();
                writer.add(entryElement.getStart());
                writer.add(entryElement.getContentReader());

                addAtomElement(IOUtils.toInputStream("<content type=\"application/xml\"/>"), writer);

                writer.add(entryElement.getEnd());
            }
        }

        writer.add(reader);

        writer.flush();
        writer.close();
    } finally {
        reader.close();
    }

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

---

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

public InputStream addAtomInlinecount(final InputStream feed, final int count) throws Exception {
    final XMLEventReader reader = getEventReader(feed);

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

    try {//  w w  w.j  av a  2 s.  c o  m

        final XMLElement feedElement = extractElement(reader, writer, Collections.<String>singletonList("feed"),
                0, 1, 1).getValue();

        writer.add(feedElement.getStart());
        addAtomElement(IOUtils.toInputStream(String.format("<m:count>%d</m:count>", count), Constants.ENCODING),
                writer);
        writer.add(feedElement.getContentReader());
        writer.add(feedElement.getEnd());

        while (reader.hasNext()) {
            writer.add(reader.nextEvent());
        }

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

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

---

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