Example usage for javax.xml.stream XMLStreamReader require

List of usage examples for javax.xml.stream XMLStreamReader require

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Introduction

In this page you can find the example usage for javax.xml.stream XMLStreamReader require.

Prototype

public void require(int type, String namespaceURI, String localName) throws XMLStreamException;

Source Link

Document

Test if the current event is of the given type and if the namespace and name match the current namespace and name of the current event.

Usage

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    XMLInputFactory inputFactory = XMLInputFactory.newInstance();
    XMLStreamReader reader = inputFactory.createXMLStreamReader(new FileInputStream(new File("test.xml")));

    int eventTypeID = reader.nextTag();
    reader.require(XMLStreamConstants.START_ELEMENT, null, "person");

    eventTypeID = reader.nextTag();/*from w ww .  j  av  a  2s  . c  om*/
    reader.require(XMLStreamConstants.START_ELEMENT, null, "first_name");
    System.out.println(reader.getElementText());

}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    XMLInputFactory inputFactory = XMLInputFactory.newInstance();
    XMLStreamReader reader = inputFactory.createXMLStreamReader(new FileInputStream(new File("test.xml")));

    int eventTypeID = reader.nextTag();
    reader.require(XMLStreamConstants.START_ELEMENT, null, "person");

    eventTypeID = reader.nextTag();/*  w  ww  .  j  a v  a  2s .  co m*/
    try {
        reader.require(XMLStreamConstants.START_ELEMENT, null, "first_name");
    } catch (XMLStreamException e) {
        System.out.println("Assertion failed. " + e.getMessage() + " at " + reader.getLocation().getLineNumber()
                + ":" + reader.getLocation().getColumnNumber());
    }
    System.out.println(reader.getElementText());

}

From source file:Main.java

/**
 * Static utility method that throws an exception if the supplied reader's
 * cursor doesn't point to a START_ELEMENT with the given name.
 * //from  www .  jav a  2s. c o m
 * @param reader The reader to test.
 * @param name The name of the element to require.
 * @throws XMLStreamException If the reader state is an element with the
 *             specified name.
 */
public static final void requireElement(XMLStreamReader reader, QName name) throws XMLStreamException {

    reader.require(XMLStreamReader.START_ELEMENT, name.getNamespaceURI(), name.getLocalPart());

}

From source file:Main.java

public static void readStartTag(XMLStreamReader reader, String localName) throws XMLStreamException {
    reader.nextTag();/*from  w w w  .j av  a 2s . c o  m*/
    reader.require(XMLStreamConstants.START_ELEMENT, null, localName);
}

From source file:Main.java

public static void readEndTag(XMLStreamReader reader, String localName) throws XMLStreamException {
    reader.nextTag();/*from  w  ww . j av  a  2 s.  c  o  m*/
    reader.require(XMLStreamConstants.END_ELEMENT, null, localName);
}

From source file:Main.java

/**
 * Load text of the current element.//from ww w . j a v a2 s.c  o  m
 * @param reader XML reader.
 * @return Text of the element.
 * @throws XMLStreamException when the text cannot be read or XML is malformed.
 */
public static String loadElementText(XMLStreamReader reader) throws XMLStreamException {
    reader.next();
    if (reader.isEndElement()) {
        return "";
    }
    reader.require(XMLStreamConstants.CHARACTERS, null, null);
    String text = reader.getText();
    reader.next();
    reader.require(XMLStreamConstants.END_ELEMENT, null, null);
    return text;
}

From source file:com.microsoft.windowsazure.services.table.client.AtomPubParser.java

/**
 * Reserved for internal use. Parses the operation response as a collection of entities. Reads entity data from the
 * specified input stream using the specified class type and optionally projects each entity result with the
 * specified resolver into an {@link ODataPayload} containing a collection of {@link TableResult} objects. .
 * /*from   www. j a  va2  s.  co  m*/
 * @param inStream
 *            The <code>InputStream</code> to read the data to parse from.
 * @param clazzType
 *            The class type <code>T</code> implementing {@link TableEntity} for the entities returned. Set to
 *            <code>null</code> to ignore the returned entities and copy only response properties into the
 *            {@link TableResult} objects.
 * @param resolver
 *            An {@link EntityResolver} instance to project the entities into instances of type <code>R</code>. Set
 *            to <code>null</code> to return the entities as instances of the class type <code>T</code>.
 * @param opContext
 *            An {@link OperationContext} object used to track the execution of the operation.
 * @return
 *         An {@link ODataPayload} containing a collection of {@link TableResult} objects with the parsed operation
 *         response.
 * 
 * @throws XMLStreamException
 *             if an error occurs while accessing the stream.
 * @throws ParseException
 *             if an error occurs while parsing the stream.
 * @throws InstantiationException
 *             if an error occurs while constructing the result.
 * @throws IllegalAccessException
 *             if an error occurs in reflection while parsing the result.
 * @throws StorageException
 *             if a storage service error occurs.
 */
@SuppressWarnings("unchecked")
protected static <T extends TableEntity, R> ODataPayload<?> parseResponse(final InputStream inStream,
        final Class<T> clazzType, final EntityResolver<R> resolver, final OperationContext opContext)
        throws XMLStreamException, ParseException, InstantiationException, IllegalAccessException,
        StorageException {
    ODataPayload<T> corePayload = null;
    ODataPayload<R> resolvedPayload = null;
    ODataPayload<?> commonPayload = null;

    if (resolver != null) {
        resolvedPayload = new ODataPayload<R>();
        commonPayload = resolvedPayload;
    } else {
        corePayload = new ODataPayload<T>();
        commonPayload = corePayload;
    }

    final XMLStreamReader xmlr = Utility.createXMLStreamReaderFromStream(inStream);
    int eventType = xmlr.getEventType();
    xmlr.require(XMLStreamConstants.START_DOCUMENT, null, null);
    eventType = xmlr.next();

    xmlr.require(XMLStreamConstants.START_ELEMENT, null, ODataConstants.FEED);
    // skip feed chars
    eventType = xmlr.next();

    while (xmlr.hasNext()) {
        eventType = xmlr.next();

        if (eventType == XMLStreamConstants.CHARACTERS) {
            xmlr.getText();
            continue;
        }

        final String name = xmlr.getName().toString();

        if (eventType == XMLStreamConstants.START_ELEMENT) {
            if (name.equals(ODataConstants.BRACKETED_ATOM_NS + ODataConstants.ENTRY)) {
                final TableResult res = parseEntity(xmlr, clazzType, resolver, opContext);
                if (corePayload != null) {
                    corePayload.tableResults.add(res);
                }

                if (resolver != null) {
                    resolvedPayload.results.add((R) res.getResult());
                } else {
                    corePayload.results.add((T) res.getResult());
                }
            }
        } else if (eventType == XMLStreamConstants.END_ELEMENT
                && name.equals(ODataConstants.BRACKETED_ATOM_NS + ODataConstants.FEED)) {
            break;
        }
    }

    xmlr.require(XMLStreamConstants.END_ELEMENT, null, ODataConstants.FEED);
    return commonPayload;
}

From source file:com.microsoft.windowsazure.services.table.client.AtomPubParser.java

/**
 * Reserved for internal use. Reads the properties of an entity from the stream into a map of property names to
 * typed values. Reads the entity data as an AtomPub Entry Resource from the specified {@link XMLStreamReader} into
 * a map of <code>String</code> property names to {@link EntityProperty} data typed values.
 * //www  .  j a  v  a 2s . c o  m
 * @param xmlr
 *            The <code>XMLStreamReader</code> to read the data from.
 * @param opContext
 *            An {@link OperationContext} object used to track the execution of the operation.
 * 
 * @return
 *         A <code>java.util.HashMap</code> containing a map of <code>String</code> property names to
 *         {@link EntityProperty} data typed values found in the entity data.
 * @throws XMLStreamException
 *             if an error occurs accessing the stream.
 * @throws ParseException
 *             if an error occurs converting the input to a particular data type.
 */
protected static HashMap<String, EntityProperty> readProperties(final XMLStreamReader xmlr,
        final OperationContext opContext) throws XMLStreamException, ParseException {
    int eventType = xmlr.getEventType();
    xmlr.require(XMLStreamConstants.START_ELEMENT, null, ODataConstants.PROPERTIES);
    final HashMap<String, EntityProperty> properties = new HashMap<String, EntityProperty>();

    while (xmlr.hasNext()) {
        eventType = xmlr.next();
        if (eventType == XMLStreamConstants.CHARACTERS) {
            xmlr.getText();
            continue;
        }

        if (eventType == XMLStreamConstants.START_ELEMENT
                && xmlr.getNamespaceURI().equals(ODataConstants.DATA_SERVICES_NS)) {
            final String key = xmlr.getLocalName();
            String val = Constants.EMPTY_STRING;
            String edmType = null;

            if (xmlr.getAttributeCount() > 0) {
                edmType = xmlr.getAttributeValue(ODataConstants.DATA_SERVICES_METADATA_NS, ODataConstants.TYPE);
            }

            // move to chars
            eventType = xmlr.next();

            if (eventType == XMLStreamConstants.CHARACTERS) {
                val = xmlr.getText();

                // end element
                eventType = xmlr.next();
            }

            xmlr.require(XMLStreamConstants.END_ELEMENT, null, key);

            final EntityProperty newProp = new EntityProperty(val, EdmType.parse(edmType));
            properties.put(key, newProp);
        } else if (eventType == XMLStreamConstants.END_ELEMENT && xmlr.getName().toString()
                .equals(ODataConstants.BRACKETED_DATA_SERVICES_METADATA_NS + ODataConstants.PROPERTIES)) {
            // End read properties
            break;
        }
    }

    xmlr.require(XMLStreamConstants.END_ELEMENT, null, ODataConstants.PROPERTIES);
    return properties;
}

From source file:com.microsoft.windowsazure.services.table.client.AtomPubParser.java

/**
 * Reserved for internal use. Parses the operation response as an entity. Reads entity data from the specified
 * <code>XMLStreamReader</code> using the specified class type and optionally projects the entity result with the
 * specified resolver into a {@link TableResult} object.
 * //  ww w  .  j  a  va 2s  .  c  o  m
 * @param xmlr
 *            The <code>XMLStreamReader</code> to read the data to parse from.
 * @param httpStatusCode
 *            The HTTP status code returned with the operation response.
 * @param clazzType
 *            The class type <code>T</code> implementing {@link TableEntity} for the entity returned. Set to
 *            <code>null</code> to ignore the returned entity and copy only response properties into the
 *            {@link TableResult} object.
 * @param resolver
 *            An {@link EntityResolver} instance to project the entity into an instance of type <code>R</code>. Set
 *            to <code>null</code> to return the entitys as instance of the class type <code>T</code>.
 * @param opContext
 *            An {@link OperationContext} object used to track the execution of the operation.
 * @return
 *         A {@link TableResult} object with the parsed operation response.
 * 
 * @throws XMLStreamException
 *             if an error occurs while accessing the stream.
 * @throws ParseException
 *             if an error occurs while parsing the stream.
 * @throws InstantiationException
 *             if an error occurs while constructing the result.
 * @throws IllegalAccessException
 *             if an error occurs in reflection while parsing the result.
 * @throws StorageException
 *             if a storage service error occurs.
 */
protected static <T extends TableEntity, R> TableResult parseSingleOpResponse(final XMLStreamReader xmlr,
        final int httpStatusCode, final Class<T> clazzType, final EntityResolver<R> resolver,
        final OperationContext opContext) throws XMLStreamException, ParseException, InstantiationException,
        IllegalAccessException, StorageException {
    xmlr.require(XMLStreamConstants.START_DOCUMENT, null, null);
    xmlr.next();

    final TableResult res = parseEntity(xmlr, clazzType, resolver, opContext);
    res.setHttpStatusCode(httpStatusCode);
    return res;
}

From source file:com.microsoft.windowsazure.services.table.client.AtomPubParser.java

/**
 * Reserved for internal use. Parses the operation response as an entity. Parses the result returned in the
 * specified stream in AtomPub format into a {@link TableResult} containing an entity of the specified class type
 * projected using the specified resolver.
 * /*from w  w  w  .j a  va2  s  . c  o  m*/
 * @param xmlr
 *            An <code>XMLStreamReader</code> on the input stream.
 * @param clazzType
 *            The class type <code>T</code> implementing {@link TableEntity} for the entity returned. Set to
 *            <code>null</code> to ignore the returned entity and copy only response properties into the
 *            {@link TableResult} object.
 * @param resolver
 *            An {@link EntityResolver} instance to project the entity into an instance of type <code>R</code>. Set
 *            to <code>null</code> to return the entity as an instance of the class type <code>T</code>.
 * @param opContext
 *            An {@link OperationContext} object used to track the execution of the operation.
 * @return
 *         A {@link TableResult} containing the parsed entity result of the operation.
 * 
 * @throws XMLStreamException
 *             if an error occurs while accessing the stream.
 * @throws ParseException
 *             if an error occurs while parsing the stream.
 * @throws InstantiationException
 *             if an error occurs while constructing the result.
 * @throws IllegalAccessException
 *             if an error occurs in reflection while parsing the result.
 * @throws StorageException
 *             if a storage service error occurs.
 */
protected static <T extends TableEntity, R> TableResult parseEntity(final XMLStreamReader xmlr,
        final Class<T> clazzType, final EntityResolver<R> resolver, final OperationContext opContext)
        throws XMLStreamException, ParseException, InstantiationException, IllegalAccessException,
        StorageException {
    int eventType = xmlr.getEventType();
    final TableResult res = new TableResult();

    xmlr.require(XMLStreamConstants.START_ELEMENT, null, ODataConstants.ENTRY);

    res.setEtag(StringEscapeUtils.unescapeHtml4(
            xmlr.getAttributeValue(ODataConstants.DATA_SERVICES_METADATA_NS, ODataConstants.ETAG)));

    while (xmlr.hasNext()) {
        eventType = xmlr.next();
        if (eventType == XMLStreamConstants.CHARACTERS) {
            xmlr.getText();
            continue;
        }

        final String name = xmlr.getName().toString();

        if (eventType == XMLStreamConstants.START_ELEMENT) {
            if (name.equals(ODataConstants.BRACKETED_ATOM_NS + ODataConstants.ID)) {
                res.setId(Utility.readElementFromXMLReader(xmlr, ODataConstants.ID));
            } else if (name
                    .equals(ODataConstants.BRACKETED_DATA_SERVICES_METADATA_NS + ODataConstants.PROPERTIES)) {
                // Do read properties
                if (resolver == null && clazzType == null) {
                    return res;
                } else {
                    res.setProperties(readProperties(xmlr, opContext));
                    break;
                }
            }
        }
    }

    // Move to end Content
    eventType = xmlr.next();
    if (eventType == XMLStreamConstants.CHARACTERS) {
        eventType = xmlr.next();
    }
    xmlr.require(XMLStreamConstants.END_ELEMENT, null, ODataConstants.CONTENT);

    eventType = xmlr.next();
    if (eventType == XMLStreamConstants.CHARACTERS) {
        eventType = xmlr.next();
    }

    xmlr.require(XMLStreamConstants.END_ELEMENT, null, ODataConstants.ENTRY);

    String rowKey = null;
    String partitionKey = null;
    Date timestamp = null;

    // Remove core properties from map and set individually
    EntityProperty tempProp = res.getProperties().get(TableConstants.PARTITION_KEY);
    if (tempProp != null) {
        res.getProperties().remove(TableConstants.PARTITION_KEY);
        partitionKey = tempProp.getValueAsString();
    }

    tempProp = res.getProperties().get(TableConstants.ROW_KEY);
    if (tempProp != null) {
        res.getProperties().remove(TableConstants.ROW_KEY);
        rowKey = tempProp.getValueAsString();
    }

    tempProp = res.getProperties().get(TableConstants.TIMESTAMP);
    if (tempProp != null) {
        res.getProperties().remove(TableConstants.TIMESTAMP);
        timestamp = tempProp.getValueAsDate();
    }

    if (resolver != null) {
        // Call resolver
        res.setResult(resolver.resolve(partitionKey, rowKey, timestamp, res.getProperties(), res.getEtag()));
    } else if (clazzType != null) {
        // Generate new entity and return
        final T entity = clazzType.newInstance();
        entity.setEtag(res.getEtag());

        entity.setPartitionKey(partitionKey);
        entity.setRowKey(rowKey);
        entity.setTimestamp(timestamp);

        entity.readEntity(res.getProperties(), opContext);

        res.setResult(entity);
    }

    return res;
}