Example usage for javax.xml.stream XMLEventReader nextEvent

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

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Introduction

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

Prototype

public XMLEvent nextEvent() throws XMLStreamException;

Source Link

Document

Gets the next XMLEvent.

Usage

From source file:org.apache.olingo.commons.core.serialization.AtomDeserializer.java

private void count(final XMLEventReader reader, final StartElement start, final EntitySet entitySet)
        throws XMLStreamException {

    boolean foundEndElement = false;
    while (reader.hasNext() && !foundEndElement) {
        final XMLEvent event = reader.nextEvent();

        if (event.isCharacters() && !event.asCharacters().isWhiteSpace()) {
            entitySet.setCount(Integer.valueOf(event.asCharacters().getData()));
        }//from  w w  w. j ava  2 s .co  m

        if (event.isEndElement() && start.getName().equals(event.asEndElement().getName())) {
            foundEndElement = true;
        }
    }
}

From source file:org.apache.olingo.commons.core.serialization.AtomDeserializer.java

private EntitySet entitySet(final XMLEventReader reader, final StartElement start)
        throws XMLStreamException, EdmPrimitiveTypeException {
    if (!Constants.QNAME_ATOM_ELEM_FEED.equals(start.getName())) {
        return null;
    }/*  ww  w  .j av a2s  .  c om*/
    final EntitySetImpl entitySet = new EntitySetImpl();
    final Attribute xmlBase = start.getAttributeByName(Constants.QNAME_ATTR_XML_BASE);
    if (xmlBase != null) {
        entitySet.setBaseURI(xmlBase.getValue());
    }

    boolean foundEndFeed = false;
    while (reader.hasNext() && !foundEndFeed) {
        final XMLEvent event = reader.nextEvent();
        if (event.isStartElement()) {
            if (countQName.equals(event.asStartElement().getName())) {
                count(reader, event.asStartElement(), entitySet);
            } else if (Constants.QNAME_ATOM_ELEM_ID.equals(event.asStartElement().getName())) {
                common(reader, event.asStartElement(), entitySet, "id");
            } else if (Constants.QNAME_ATOM_ELEM_TITLE.equals(event.asStartElement().getName())) {
                common(reader, event.asStartElement(), entitySet, "title");
            } else if (Constants.QNAME_ATOM_ELEM_SUMMARY.equals(event.asStartElement().getName())) {
                common(reader, event.asStartElement(), entitySet, "summary");
            } else if (Constants.QNAME_ATOM_ELEM_UPDATED.equals(event.asStartElement().getName())) {
                common(reader, event.asStartElement(), entitySet, "updated");
            } else if (Constants.QNAME_ATOM_ELEM_LINK.equals(event.asStartElement().getName())) {
                final Attribute rel = event.asStartElement()
                        .getAttributeByName(QName.valueOf(Constants.ATTR_REL));
                if (rel != null) {
                    if (Constants.NEXT_LINK_REL.equals(rel.getValue())) {
                        final Attribute href = event.asStartElement()
                                .getAttributeByName(QName.valueOf(Constants.ATTR_HREF));
                        if (href != null) {
                            entitySet.setNext(URI.create(href.getValue()));
                        }
                    }
                    if (ODataServiceVersion.V40.getNamespace(NamespaceKey.DELTA_LINK_REL)
                            .equals(rel.getValue())) {
                        final Attribute href = event.asStartElement()
                                .getAttributeByName(QName.valueOf(Constants.ATTR_HREF));
                        if (href != null) {
                            entitySet.setDeltaLink(URI.create(href.getValue()));
                        }
                    }
                }
            } else if (Constants.QNAME_ATOM_ELEM_ENTRY.equals(event.asStartElement().getName())) {
                entitySet.getEntities().add(entity(reader, event.asStartElement()));
            } else if (entryRefQName.equals(event.asStartElement().getName())) {
                entitySet.getEntities().add(entityRef(event.asStartElement()));
            } else if (annotationQName.equals(event.asStartElement().getName())) {
                entitySet.getAnnotations().add(annotation(reader, event.asStartElement()));
            }
        }

        if (event.isEndElement() && start.getName().equals(event.asEndElement().getName())) {
            foundEndFeed = true;
        }
    }

    return entitySet;
}

From source file:org.apache.olingo.fit.metadata.Metadata.java

public Metadata(final InputStream is) {
    DEF_NS = Constants.get(ConstantKey.EDM_NS);
    schemas = new HashMap<String, Schema>();

    try {/*from   w  w  w .j av  a  2  s  .  c o  m*/
        final XMLInputFactory ifactory = XMLInputFactory.newInstance();
        final XMLEventReader reader = ifactory.createXMLEventReader(is,
                org.apache.olingo.commons.api.Constants.UTF8);

        try {
            while (reader.hasNext()) {
                final XMLEvent event = reader.nextEvent();

                if (event.isStartElement()
                        && event.asStartElement().getName().equals(new QName(DEF_NS, "Schema"))) {
                    final Schema schema = getSchema(event.asStartElement(), reader);
                    schemas.put(schema.getNamespace(), schema);
                }
            }

        } catch (Exception ignore) {
            // ignore
        } finally {
            reader.close();
            IOUtils.closeQuietly(is);
        }
    } catch (Exception e) {
        LOG.error("Error parsing metadata", e);
    }

    for (Map.Entry<String, Schema> schemaEntry : schemas.entrySet()) {
        for (EntityType entityType : schemaEntry.getValue().getEntityTypes()) {
            for (NavigationProperty property : entityType.getNavigationProperties()) {
                property.setFeed(property.getType().startsWith("Collection("));

                final Collection<EntitySet> entitySets = schemaEntry.getValue().getContainers().iterator()
                        .next().getEntitySets(schemaEntry.getKey(), entityType.getName());

                final Iterator<EntitySet> iter = entitySets.iterator();
                boolean found = false;

                while (!found && iter.hasNext()) {
                    final EntitySet entitySet = iter.next();
                    final String target = entitySet.getTarget(property.getName());
                    if (StringUtils.isNotBlank(target)) {
                        property.setTarget(entitySet.getTarget(property.getName()));
                        found = true;
                    }
                }
            }
        }
    }
}

From source file:org.apache.olingo.fit.metadata.Metadata.java

private Schema getSchema(final StartElement start, final XMLEventReader reader) throws XMLStreamException {
    final Schema schema = new Schema(start.getAttributeByName(new QName("Namespace")).getValue());

    boolean completed = false;

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

        if (event.isStartElement() && event.asStartElement().getName().equals(new QName(DEF_NS, "EntityType"))
                || event.isStartElement()
                        && event.asStartElement().getName().equals(new QName(DEF_NS, "ComplexType"))) {
            final EntityType entityType = getEntityType(event.asStartElement(), reader);
            schema.addEntityType(entityType.getName(), entityType);
        } else if (event.isStartElement()
                && event.asStartElement().getName().equals(new QName(DEF_NS, "EntityContainer"))) {
            final org.apache.olingo.fit.metadata.Container container = getContainer(event.asStartElement(),
                    reader);/*from   w ww . j a v a2  s. c  o m*/
            schema.addContainer(container.getName(), container);
        } else if (event.isEndElement() && event.asEndElement().getName().equals(start.getName())) {
            completed = true;
        }
    }

    return schema;
}

From source file:org.apache.olingo.fit.metadata.Metadata.java

private org.apache.olingo.fit.metadata.Container getContainer(final StartElement start,
        final XMLEventReader reader) throws XMLStreamException {
    final org.apache.olingo.fit.metadata.Container container = new org.apache.olingo.fit.metadata.Container(
            start.getAttributeByName(new QName("Name")).getValue());

    boolean completed = false;

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

        if (event.isStartElement() && (event.asStartElement().getName().equals(new QName(DEF_NS, "EntitySet"))
                || event.asStartElement().getName().equals(new QName(DEF_NS, "Singleton")))) {
            final EntitySet entitySet = getEntitySet(event.asStartElement(), reader);
            container.addEntitySet(entitySet.getName(), entitySet);
        } else if (event.isEndElement() && event.asEndElement().getName().equals(start.getName())) {
            completed = true;// w  w  w.  ja  va 2  s . c  o  m
        }
    }

    return container;
}

From source file:org.apache.olingo.fit.metadata.Metadata.java

private EntityType getEntityType(final StartElement start, final XMLEventReader reader)
        throws XMLStreamException {
    final EntityType entityType = new EntityType(start.getAttributeByName(new QName("Name")).getValue());
    final Attribute baseType = start.getAttributeByName(new QName("BaseType"));
    if (baseType != null) {
        entityType.setBaseType(baseType.getValue());
    }//from ww  w.  ja  v  a  2  s.com
    final Attribute openType = start.getAttributeByName(new QName("OpenType"));
    if (openType != null) {
        entityType.setOpenType(BooleanUtils.toBoolean(openType.getValue()));
    }

    boolean completed = false;

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

        if (event.isStartElement() && event.asStartElement().getName().equals(new QName(DEF_NS, "Property"))) {
            final org.apache.olingo.fit.metadata.Property property = getProperty(event.asStartElement());
            entityType.addProperty(property.getName(), property);
        } else if (event.isStartElement()
                && event.asStartElement().getName().equals(new QName(DEF_NS, "NavigationProperty"))) {
            final NavigationProperty property = getNavigationProperty(event.asStartElement());
            entityType.addNavigationProperty(property.getName(), property);
        } else if (event.isEndElement() && event.asEndElement().getName().equals(start.getName())) {
            completed = true;
        }
    }

    return entityType;
}

From source file:org.apache.olingo.fit.metadata.Metadata.java

private EntitySet getEntitySet(final StartElement start, final XMLEventReader reader)
        throws XMLStreamException {
    final EntitySet entitySet = "Singleton".equals(start.getName().getLocalPart())
            ? new EntitySet(start.getAttributeByName(new QName("Name")).getValue(), true)
            : new EntitySet(start.getAttributeByName(new QName("Name")).getValue());

    Attribute type = start.getAttributeByName(new QName("EntityType"));
    if (type == null) {
        type = start.getAttributeByName(new QName("Type"));
        entitySet.setType(type == null ? null : type.getValue());
    } else {/*from   www  .  ja v  a2  s  .co  m*/
        entitySet.setType(type.getValue());
    }

    boolean completed = false;

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

        if (event.isStartElement()
                && event.asStartElement().getName().equals(new QName(DEF_NS, "NavigationPropertyBinding"))) {
            final String path = event.asStartElement().getAttributeByName(new QName("Path")).getValue();
            final String target = event.asStartElement().getAttributeByName(new QName("Target")).getValue();
            entitySet.addBinding(path, target);
        } else if (event.isEndElement() && event.asEndElement().getName().equals(start.getName())) {
            completed = true;
        }
    }

    return entitySet;
}

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);//from   www .ja v  a 2s . com
    }

    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);/*from  w  ww  .j  a va2s .  co m*/

    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;/* www  . j  a  v a2  s.  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));
}