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.client.core.serialization.AtomDeserializer.java

private Object fromPrimitive(final XMLEventReader reader, final StartElement start, final EdmTypeInfo typeInfo)
        throws XMLStreamException, EdmPrimitiveTypeException {

    Object value = null;//  www .  j a  v  a  2  s  . co  m

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

        if (event.isStartElement() && typeInfo != null && typeInfo.getPrimitiveTypeKind().isGeospatial()) {
            final EdmPrimitiveTypeKind geoType = EdmPrimitiveTypeKind
                    .valueOfFQN(typeInfo.getFullQualifiedName().toString());
            value = geoDeserializer.deserialize(reader, event.asStartElement(), geoType);
        }

        if (event.isCharacters() && !event.asCharacters().isWhiteSpace()
                && (typeInfo == null || !typeInfo.getPrimitiveTypeKind().isGeospatial())) {
            final String stringValue = event.asCharacters().getData();
            if (typeInfo == null) {
                value = stringValue;
            } else {
                final EdmPrimitiveType primitiveType = (EdmPrimitiveType) typeInfo.getType();
                final Class<?> returnType = primitiveType.getDefaultType().isAssignableFrom(Calendar.class)
                        ? Timestamp.class
                        : primitiveType.getDefaultType();
                value = ((EdmPrimitiveType) typeInfo.getType()).valueOfString(stringValue, true, null,
                        Constants.DEFAULT_PRECISION, Constants.DEFAULT_SCALE, true, returnType);
            }
        }

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

    return value;
}

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

private Object fromComplexOrEnum(final XMLEventReader reader, final StartElement start)
        throws XMLStreamException, EdmPrimitiveTypeException {

    Object value = null;//  w  ww. j  a va 2 s  .co m

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

        if (event.isStartElement()) {
            if (value == null) {
                value = new ComplexValue();
            }

            if (Constants.QNAME_ATOM_ELEM_LINK.equals(event.asStartElement().getName())) {
                final Link link = new Link();
                final Attribute rel = event.asStartElement()
                        .getAttributeByName(QName.valueOf(Constants.ATTR_REL));
                if (rel != null) {
                    link.setRel(rel.getValue());
                }
                final Attribute title = event.asStartElement()
                        .getAttributeByName(QName.valueOf(Constants.ATTR_TITLE));
                if (title != null) {
                    link.setTitle(title.getValue());
                }
                final Attribute href = event.asStartElement()
                        .getAttributeByName(QName.valueOf(Constants.ATTR_HREF));
                if (href != null) {
                    link.setHref(href.getValue());
                }
                final Attribute type = event.asStartElement()
                        .getAttributeByName(QName.valueOf(Constants.ATTR_TYPE));
                if (type != null) {
                    link.setType(type.getValue());
                }

                if (link.getRel().startsWith(Constants.NS_NAVIGATION_LINK_REL)) {

                    ((ComplexValue) value).getNavigationLinks().add(link);
                    inline(reader, event.asStartElement(), link);
                } else if (link.getRel().startsWith(Constants.NS_ASSOCIATION_LINK_REL)) {

                    ((Valuable) value).asComplex().getAssociationLinks().add(link);
                }
            } else {
                ((ComplexValue) value).getValue().add(property(reader, event.asStartElement()));
            }
        }

        if (event.isCharacters() && !event.asCharacters().isWhiteSpace()) {
            value = event.asCharacters().getData();
        }

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

    return value;
}

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

private void fromCollection(final Valuable valuable, final XMLEventReader reader, final StartElement start,
        final EdmTypeInfo typeInfo) throws XMLStreamException, EdmPrimitiveTypeException {

    List<Object> values = new ArrayList<Object>();
    ValueType valueType = ValueType.COLLECTION_PRIMITIVE;

    final EdmTypeInfo type = typeInfo == null ? null
            : new EdmTypeInfo.Builder().setTypeExpression(typeInfo.getFullQualifiedName().toString()).build();

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

        if (event.isStartElement()) {
            switch (guessPropertyType(reader, typeInfo)) {
            case COMPLEX:
                final Object complexValue = fromComplexOrEnum(reader, event.asStartElement());
                valueType = ValueType.COLLECTION_COMPLEX;
                values.add(complexValue);
                break;

            case ENUM:
                valueType = ValueType.COLLECTION_ENUM;
                values.add(fromComplexOrEnum(reader, event.asStartElement()));
                break;

            case PRIMITIVE:
                final Object value = fromPrimitive(reader, event.asStartElement(), type);
                valueType = value instanceof Geospatial ? ValueType.COLLECTION_GEOSPATIAL
                        : ValueType.COLLECTION_PRIMITIVE;
                values.add(value);/*from   w  w  w  . j  a v a 2  s .  c om*/
                break;

            default:
                // do not add null or empty values
            }
        }

        if (event.isEndElement() && start.getName().equals(event.asEndElement().getName())) {
            foundEndProperty = true;
        }
    }
    valuable.setValue(valueType, values);
}

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

private PropertyType guessPropertyType(final XMLEventReader reader, final EdmTypeInfo typeInfo)
        throws XMLStreamException {

    XMLEvent child = null;//from   w  ww .  j  a v a 2s  .c o m
    while (reader.hasNext() && child == null) {
        final XMLEvent event = reader.peek();
        if (event.isCharacters() && event.asCharacters().isWhiteSpace()) {
            reader.nextEvent();
        } else {
            child = event;
        }
    }

    final PropertyType type;
    if (child == null) {
        type = typeInfo == null || typeInfo.isPrimitiveType() ? PropertyType.PRIMITIVE : PropertyType.ENUM;
    } else {
        if (child.isStartElement()) {
            if (Constants.NS_GML.equals(child.asStartElement().getName().getNamespaceURI())) {
                type = PropertyType.PRIMITIVE;
            } else if (elementQName.equals(child.asStartElement().getName())) {
                type = PropertyType.COLLECTION;
            } else {
                type = PropertyType.COMPLEX;
            }
        } else if (child.isCharacters()) {
            type = typeInfo == null || typeInfo.isPrimitiveType() ? PropertyType.PRIMITIVE : PropertyType.ENUM;
        } else {
            type = PropertyType.EMPTY;
        }
    }

    return type;
}

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

private StartElement skipBeforeFirstStartElement(final XMLEventReader reader) throws XMLStreamException {
    StartElement startEvent = null;
    while (reader.hasNext() && startEvent == null) {
        final XMLEvent event = reader.nextEvent();
        if (event.isStartElement()) {
            startEvent = event.asStartElement();
        }// w  w w.j av a 2s .  c om
    }
    if (startEvent == null) {
        throw new IllegalArgumentException("Cannot find any XML start element");
    }

    return startEvent;
}

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

private void common(final XMLEventReader reader, final StartElement start, final AbstractODataObject object,
        final String key) throws XMLStreamException {

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

        if (event.isCharacters() && !event.asCharacters().isWhiteSpace()) {
            object.setCommonProperty(key, event.asCharacters().getData());
        }// w w  w  .  j a  v a2  s.co  m

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

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

private void inline(final XMLEventReader reader, final StartElement start, final Link link)
        throws XMLStreamException, EdmPrimitiveTypeException {

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

        if (event.isStartElement()) {
            if (inlineQName.equals(event.asStartElement().getName())) {
                StartElement inline = getStartElement(reader);
                if (inline != null) {
                    if (Constants.QNAME_ATOM_ELEM_ENTRY.equals(inline.getName())) {
                        link.setInlineEntity(entity(reader, inline));
                    }//from   w  ww  .  ja  v  a2s . co m
                    if (Constants.QNAME_ATOM_ELEM_FEED.equals(inline.getName())) {
                        link.setInlineEntitySet(entitySet(reader, inline));
                    }
                }
            } else if (annotationQName.equals(event.asStartElement().getName())) {
                link.getAnnotations().add(annotation(reader, event.asStartElement()));
            }
        }

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

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

private StartElement getStartElement(final XMLEventReader reader) throws XMLStreamException {
    while (reader.hasNext()) {
        final XMLEvent innerEvent = reader.peek();
        if (innerEvent.isCharacters() && innerEvent.asCharacters().isWhiteSpace()) {
            reader.nextEvent();
        } else if (innerEvent.isStartElement()) {
            return innerEvent.asStartElement();
        } else if (innerEvent.isEndElement() && inlineQName.equals(innerEvent.asEndElement().getName())) {
            return null;
        }//from   www  .  j av  a  2  s .  co m
    }
    return null;
}

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

private Delta delta(final XMLEventReader reader, final StartElement start)
        throws XMLStreamException, EdmPrimitiveTypeException {
    if (!Constants.QNAME_ATOM_ELEM_FEED.equals(start.getName())) {
        return null;
    }/*from w  w  w .  j  a va 2  s .co m*/
    final Delta delta = new Delta();
    final Attribute xmlBase = start.getAttributeByName(Constants.QNAME_ATTR_XML_BASE);
    if (xmlBase != null) {
        delta.setBaseURI(URI.create(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(), delta);
            } else if (Constants.QNAME_ATOM_ELEM_ID.equals(event.asStartElement().getName())) {
                common(reader, event.asStartElement(), delta, "id");
            } else if (Constants.QNAME_ATOM_ELEM_TITLE.equals(event.asStartElement().getName())) {
                common(reader, event.asStartElement(), delta, "title");
            } else if (Constants.QNAME_ATOM_ELEM_SUMMARY.equals(event.asStartElement().getName())) {
                common(reader, event.asStartElement(), delta, "summary");
            } else if (Constants.QNAME_ATOM_ELEM_UPDATED.equals(event.asStartElement().getName())) {
                common(reader, event.asStartElement(), delta, "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) {
                            delta.setNext(URI.create(href.getValue()));
                        }
                    }
                    if (Constants.NS_DELTA_LINK_REL.equals(rel.getValue())) {
                        final Attribute href = event.asStartElement()
                                .getAttributeByName(QName.valueOf(Constants.ATTR_HREF));
                        if (href != null) {
                            delta.setDeltaLink(URI.create(href.getValue()));
                        }
                    }
                }
            } else if (Constants.QNAME_ATOM_ELEM_ENTRY.equals(event.asStartElement().getName())) {
                delta.getEntities().add(entity(reader, event.asStartElement()));
            } else if (deletedEntryQName.equals(event.asStartElement().getName())) {
                final DeletedEntity deletedEntity = new DeletedEntity();

                final Attribute ref = event.asStartElement()
                        .getAttributeByName(QName.valueOf(Constants.ATTR_REF));
                if (ref != null) {
                    deletedEntity.setId(URI.create(ref.getValue()));
                }
                final Attribute reason = event.asStartElement().getAttributeByName(reasonQName);
                if (reason != null) {
                    deletedEntity.setReason(Reason.valueOf(reason.getValue()));
                }

                delta.getDeletedEntities().add(deletedEntity);
            } else if (linkQName.equals(event.asStartElement().getName())
                    || deletedLinkQName.equals(event.asStartElement().getName())) {

                final DeltaLink link = new DeltaLink();

                final Attribute source = event.asStartElement()
                        .getAttributeByName(QName.valueOf(Constants.ATTR_SOURCE));
                if (source != null) {
                    link.setSource(URI.create(source.getValue()));
                }
                final Attribute relationship = event.asStartElement()
                        .getAttributeByName(QName.valueOf(Constants.ATTR_RELATIONSHIP));
                if (relationship != null) {
                    link.setRelationship(relationship.getValue());
                }
                final Attribute target = event.asStartElement()
                        .getAttributeByName(QName.valueOf(Constants.ATTR_TARGET));
                if (target != null) {
                    link.setTarget(URI.create(target.getValue()));
                }

                if (linkQName.equals(event.asStartElement().getName())) {
                    delta.getAddedLinks().add(link);
                } else {
                    delta.getDeletedLinks().add(link);
                }
            }
        }

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

    return delta;
}

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

private void properties(final XMLEventReader reader, final StartElement start, final Entity entity)
        throws XMLStreamException, EdmPrimitiveTypeException {

    final Map<String, List<Annotation>> annotations = new HashMap<String, List<Annotation>>();

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

        if (event.isStartElement()) {
            if (annotationQName.equals(event.asStartElement().getName())) {
                final String target = event.asStartElement()
                        .getAttributeByName(QName.valueOf(Constants.ATTR_TARGET)).getValue();
                if (!annotations.containsKey(target)) {
                    annotations.put(target, new ArrayList<Annotation>());
                }//  w  w  w .j  ava2s .c  o  m
                annotations.get(target).add(annotation(reader, event.asStartElement()));
            } else {
                entity.getProperties().add(property(reader, event.asStartElement()));
            }
        }

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

    for (Property property : entity.getProperties()) {
        if (annotations.containsKey(property.getName())) {
            property.getAnnotations().addAll(annotations.get(property.getName()));
        }
    }
}