diff options
Diffstat (limited to 'branches/sca-java-2.0-M4/modules/common-xml/src/main/java/org/apache/tuscany/sca/common/xml/stax/impl')
2 files changed, 0 insertions, 624 deletions
diff --git a/branches/sca-java-2.0-M4/modules/common-xml/src/main/java/org/apache/tuscany/sca/common/xml/stax/impl/StAX2SAXAdapter.java b/branches/sca-java-2.0-M4/modules/common-xml/src/main/java/org/apache/tuscany/sca/common/xml/stax/impl/StAX2SAXAdapter.java deleted file mode 100644 index df0fc069b6..0000000000 --- a/branches/sca-java-2.0-M4/modules/common-xml/src/main/java/org/apache/tuscany/sca/common/xml/stax/impl/StAX2SAXAdapter.java +++ /dev/null @@ -1,256 +0,0 @@ -/* - * Licensed to the Apache Software Foundation (ASF) under one - * or more contributor license agreements. See the NOTICE file - * distributed with this work for additional information - * regarding copyright ownership. The ASF licenses this file - * to you under the Apache License, Version 2.0 (the - * "License"); you may not use this file except in compliance - * with the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, - * software distributed under the License is distributed on an - * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY - * KIND, either express or implied. See the License for the - * specific language governing permissions and limitations - * under the License. - */ -package org.apache.tuscany.sca.common.xml.stax.impl; - -import javax.xml.namespace.QName; -import javax.xml.stream.Location; -import javax.xml.stream.XMLStreamConstants; -import javax.xml.stream.XMLStreamException; -import javax.xml.stream.XMLStreamReader; - -import org.xml.sax.Attributes; -import org.xml.sax.ContentHandler; -import org.xml.sax.Locator; -import org.xml.sax.SAXException; -import org.xml.sax.helpers.AttributesImpl; - -/** - * Adapter that converts from StAX to SAX event streams. Currently the following - * SAX events are not generated: - * <ul> - * <li>ignorableWhitespace</li> - * <li>skippedEntity</li> - * <ul> - * Also the following StAX events are not mapped: - * <ul> - * <li>CDATA</li> - * <li>COMMENT</li> - * <li>DTD</li> - * <li>ENTITY_DECLARATION</li> - * <li>ENTITY_REFERENCE</li> - * <li>NOTATION_DECLARATION</li> - * <li>SPACE</li> - * </ul> - * StAX ATTRIBUTE events are ignored but the equivalent attributes (derived from - * the START_ELEMENT event) are supplied in the SAX startElement event's - * Attributes parameter. If the adaptor is configured to pass namespace prefixes - * then namespace information will also be included in the Attributes; StAX - * NAMESPACE events are ignored. <p/> Another issue is namespace processing. If - * the reader is positioned at a sub-node, we cannot capture all the in-scope - * namespace bindings. Therefore we cannot re-create a proper SAX event stream - * from a StAX parser. <p/> For example <p/> <a:root xmlns:a="foo" - * xmlns:b="bar"><b:sub>a:foo</b:sub></a:root> <p/> And if - * you are handed a parser at <b:sub>, then your SAX events should look - * like: <p/> <b:sub xmlns:a="foo" xmlns:b="bar">a:foo</b:sub> <p/> - * not: <p/> <b:sub>a:foo</b:sub> <p/> <p/> Proposal: we change the - * receiver of SAX events (SDOXMLResourceImpl) so that it uses NamespaceContext - * to resolve prefix (as opposed to record start/endPrefixMappings and use it - * for resolution.) - * - * @version $Rev$ $Date$ - */ -public class StAX2SAXAdapter { - private final boolean namespacePrefixes; - - /** - * Construct a new StAX to SAX adapter that will convert a StAX event stream - * into a SAX event stream. - * - * @param namespacePrefixes whether xmlns attributes should be included in - * startElement events; - */ - public StAX2SAXAdapter(boolean namespacePrefixes) { - this.namespacePrefixes = namespacePrefixes; - } - - /** - * Pull events from the StAX stream and dispatch to the SAX ContentHandler. - * The StAX stream would typically be located on a START_DOCUMENT or - * START_ELEMENT event and when this method returns it will be located on - * the associated END_DOCUMENT or END_ELEMENT event. Behaviour with other - * start events is undefined. - * - * @param reader StAX event source to read - * @param handler SAX ContentHandler for processing events - * @throws XMLStreamException if there was a problem reading the stream - * @throws SAXException passed through from the ContentHandler - */ - public void parse(XMLStreamReader reader, ContentHandler handler) throws XMLStreamException, SAXException { - handler.setDocumentLocator(new LocatorAdaptor(reader.getLocation())); - - // remembers the nest level of elements to know when we are done - int level = 0; - int event = reader.getEventType(); - while (true) { - switch (event) { - case XMLStreamConstants.START_DOCUMENT: - level++; - handler.startDocument(); - break; - case XMLStreamConstants.START_ELEMENT: - level++; - handleStartElement(reader, handler); - break; - case XMLStreamConstants.PROCESSING_INSTRUCTION: - handler.processingInstruction(reader.getPITarget(), reader.getPIData()); - break; - case XMLStreamConstants.CHARACTERS: - handler.characters(reader.getTextCharacters(), reader.getTextStart(), reader - .getTextLength()); - break; - case XMLStreamConstants.END_ELEMENT: - handleEndElement(reader, handler); - level--; - if (level == 0) { - return; - } - break; - case XMLStreamConstants.END_DOCUMENT: - handler.endDocument(); - return; - /* - * uncomment to handle all events rather than just mapped - * ones // StAX events that are not mapped to SAX case - * XMLStreamConstants.COMMENT: case - * XMLStreamConstants.SPACE: case - * XMLStreamConstants.ENTITY_REFERENCE: case - * XMLStreamConstants.DTD: case XMLStreamConstants.CDATA: - * case XMLStreamConstants.NOTATION_DECLARATION: case - * XMLStreamConstants.ENTITY_DECLARATION: break; // StAX - * events handled in START_ELEMENT case - * XMLStreamConstants.ATTRIBUTE: case - * XMLStreamConstants.NAMESPACE: break; default: throw new - * AssertionError("Unknown StAX event: " + event); - */ - } - event = reader.next(); - } - } - - private void handleStartElement(XMLStreamReader reader, ContentHandler handler) throws SAXException { - // send startPrefixMapping events immediately before startElement event - int nsCount = reader.getNamespaceCount(); - for (int i = 0; i < nsCount; i++) { - String prefix = reader.getNamespacePrefix(i); - if (prefix == null) { // true for default namespace - prefix = ""; - } - handler.startPrefixMapping(prefix, reader.getNamespaceURI(i)); - } - - // fire startElement - QName qname = reader.getName(); - String prefix = qname.getPrefix(); - String rawname; - if (prefix == null || prefix.length() == 0) { - rawname = qname.getLocalPart(); - } else { - rawname = prefix + ':' + qname.getLocalPart(); - } - Attributes attrs = getAttributes(reader); - handler.startElement(qname.getNamespaceURI(), qname.getLocalPart(), rawname, attrs); - } - - private static void handleEndElement(XMLStreamReader reader, ContentHandler handler) throws SAXException { - // fire endElement - QName qname = reader.getName(); - handler.endElement(qname.getNamespaceURI(), qname.getLocalPart(), qname.toString()); - - // send endPrefixMapping events immediately after endElement event - // we send them in the opposite order to that returned but this is not - // actually required by SAX - int nsCount = reader.getNamespaceCount(); - for (int i = nsCount - 1; i >= 0; i--) { - String prefix = reader.getNamespacePrefix(i); - if (prefix == null) { // true for default namespace - prefix = ""; - } - handler.endPrefixMapping(prefix); - } - } - - /** - * Get the attributes associated with the current START_ELEMENT event. - * - * @return the StAX attributes converted to org.xml.sax.Attributes - */ - private Attributes getAttributes(XMLStreamReader reader) { - assert reader.getEventType() == XMLStreamConstants.START_ELEMENT; - - AttributesImpl attrs = new AttributesImpl(); - - // add namespace declarations if required - if (namespacePrefixes) { - for (int i = 0; i < reader.getNamespaceCount(); i++) { - String prefix = reader.getNamespacePrefix(i); - String uri = reader.getNamespaceURI(i); - attrs.addAttribute(null, prefix, "xmlns:" + prefix, "CDATA", uri); - } - } - - // Regular attributes - for (int i = 0; i < reader.getAttributeCount(); i++) { - String uri = reader.getAttributeNamespace(i); - if (uri == null) { - uri = ""; - } - String localName = reader.getAttributeLocalName(i); - String prefix = reader.getAttributePrefix(i); - String qname; - if (prefix == null || prefix.length() == 0) { - qname = localName; - } else { - qname = prefix + ':' + localName; - } - String type = reader.getAttributeType(i); - String value = reader.getAttributeValue(i); - - attrs.addAttribute(uri, localName, qname, type, value); - } - - return attrs; - } - - /** - * Adaptor for mapping Locator information. - */ - private static final class LocatorAdaptor implements Locator { - private final Location location; - - private LocatorAdaptor(Location location) { - this.location = location; - } - - public int getColumnNumber() { - return location == null ? 0 : location.getColumnNumber(); - } - - public int getLineNumber() { - return location == null ? 0 : location.getLineNumber(); - } - - public String getPublicId() { - return location == null ? "" : location.getPublicId(); - } - - public String getSystemId() { - return location == null ? "" : location.getSystemId(); - } - } -} diff --git a/branches/sca-java-2.0-M4/modules/common-xml/src/main/java/org/apache/tuscany/sca/common/xml/stax/impl/XMLStreamSerializer.java b/branches/sca-java-2.0-M4/modules/common-xml/src/main/java/org/apache/tuscany/sca/common/xml/stax/impl/XMLStreamSerializer.java deleted file mode 100644 index 883199e4dd..0000000000 --- a/branches/sca-java-2.0-M4/modules/common-xml/src/main/java/org/apache/tuscany/sca/common/xml/stax/impl/XMLStreamSerializer.java +++ /dev/null @@ -1,368 +0,0 @@ -/* - * Licensed to the Apache Software Foundation (ASF) under one - * or more contributor license agreements. See the NOTICE file - * distributed with this work for additional information - * regarding copyright ownership. The ASF licenses this file - * to you under the Apache License, Version 2.0 (the - * "License"); you may not use this file except in compliance - * with the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, - * software distributed under the License is distributed on an - * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY - * KIND, either express or implied. See the License for the - * specific language governing permissions and limitations - * under the License. - */ - -package org.apache.tuscany.sca.common.xml.stax.impl; - -import static javax.xml.XMLConstants.DEFAULT_NS_PREFIX; -import static javax.xml.XMLConstants.NULL_NS_URI; - -import javax.xml.XMLConstants; -import javax.xml.namespace.NamespaceContext; -import javax.xml.namespace.QName; -import javax.xml.stream.XMLStreamConstants; -import javax.xml.stream.XMLStreamException; -import javax.xml.stream.XMLStreamReader; -import javax.xml.stream.XMLStreamWriter; - -/** - * The XMLStreamSerializer pulls events from the XMLStreamReader and dumps into the XMLStreamWriter - * - * @version $Rev$ $Date$ - */ -public class XMLStreamSerializer implements XMLStreamConstants { - public static final String NAMESPACE_PREFIX = "ns"; - private static int namespaceSuffix; - - /* - * The behavior of the Serializer is such that it returns when it encounters the starting element for the second - * time. The depth variable tracks the depth of the Serializer and tells it when to return. Note that it is assumed - * that this Serialization starts on an Element. - */ - - /** - * Field depth - */ - private int depth; - - /** - * A flag to tell if the writer has javax.xml.stream.isRepairingNamespaces set to true - */ - private boolean isRepairingNamespaces = true; - - /** - * @param isRepairingNamespaces - */ - public XMLStreamSerializer(boolean isRepairingNamespaces) { - super(); - this.isRepairingNamespaces = isRepairingNamespaces; - } - - public XMLStreamSerializer() { - this(true); - } - - /** - * Generates a unique namespace prefix that is not in the scope of the NamespaceContext - * - * @param nsCtxt - * @return string - */ - private String generateUniquePrefix(NamespaceContext nsCtxt) { - String prefix = NAMESPACE_PREFIX + namespaceSuffix++; - // null should be returned if the prefix is not bound! - while (nsCtxt.getNamespaceURI(prefix) != null) { - prefix = NAMESPACE_PREFIX + namespaceSuffix++; - } - - return prefix; - } - - /** - * Method serialize. - * - * @param node - * @param writer - * @throws XMLStreamException - */ - public void serialize(XMLStreamReader node, XMLStreamWriter writer) throws XMLStreamException { - serializeNode(node, writer); - } - - /** - * @param reader - * @param writer - * @throws XMLStreamException - */ - protected void serializeAttributes(XMLStreamReader reader, XMLStreamWriter writer) throws XMLStreamException { - int count = reader.getAttributeCount(); - String prefix; - String namespaceName; - String localName; - String value; - for (int i = 0; i < count; i++) { - prefix = reader.getAttributePrefix(i); - namespaceName = reader.getAttributeNamespace(i); - localName = reader.getAttributeLocalName(i); - value = reader.getAttributeValue(i); - - writeAttribute(writer, prefix, localName, namespaceName, value); - - } - } - - public void writeAttribute(XMLStreamWriter writer, QName name, String value) throws XMLStreamException { - writeAttribute(writer, name.getPrefix(), name.getLocalPart(), name.getNamespaceURI(), value); - } - - public String writeAttribute(XMLStreamWriter writer, - String prefix, - String localName, - String namespaceURI, - String value) throws XMLStreamException { - String writerPrefix; - /* - * Due to parser implementations returning null as the namespace URI (for the empty namespace) we need to - * make sure that we deal with a namespace name that is not null. The best way to work around this issue is - * to set the namespace URI to "" if it is null - */ - if (namespaceURI == null) { - namespaceURI = NULL_NS_URI; - } - - if (prefix == null) { - prefix = DEFAULT_NS_PREFIX; - } - - if (isRepairingNamespaces) { - writer.writeAttribute(prefix, namespaceURI, localName, value); - return writer.getPrefix(namespaceURI); - } - - writerPrefix = writer.getPrefix(namespaceURI); - - if (!NULL_NS_URI.equals(namespaceURI)) { - if (writerPrefix != null && isDefaultNSPrefix(prefix)) { - // prefix has already being declared but this particular attrib has a - // no prefix attached. So use the prefix provided by the writer - - writer.writeAttribute(writerPrefix, namespaceURI, localName, value); - return writerPrefix; - - } else if (!isDefaultNSPrefix(prefix) && !prefix.equals(writerPrefix)) { - // writer prefix is available but different from the current - // prefix of the attrib. We should be declaring the new prefix - // as a namespace declaration - - writer.writeNamespace(prefix, namespaceURI); - writer.writeAttribute(prefix, namespaceURI, localName, value); - return prefix; - - } else if (isDefaultNSPrefix(prefix)) { - // prefix is null (or empty), but the namespace name is valid! it has not - // being written previously also. So we need to generate a prefix here - - prefix = generateUniquePrefix(writer.getNamespaceContext()); - writer.writeNamespace(prefix, namespaceURI); - writer.writeAttribute(prefix, namespaceURI, localName, value); - return prefix; - } else { - writer.writeAttribute(prefix, namespaceURI, localName, value); - return prefix; - } - } else { - // empty namespace is equal to no namespace! - writer.writeAttribute(localName, value); - return prefix; - } - } - - private boolean isDefaultNSPrefix(String prefix) { - return (prefix == null || prefix.equals(DEFAULT_NS_PREFIX)); - } - - /** - * Method serializeCData. - * - * @param reader - * @param writer - * @throws XMLStreamException - */ - protected void serializeCData(XMLStreamReader reader, XMLStreamWriter writer) throws XMLStreamException { - writer.writeCData(reader.getText()); - } - - /** - * Method serializeComment. - * - * @param reader - * @param writer - * @throws XMLStreamException - */ - protected void serializeComment(XMLStreamReader reader, XMLStreamWriter writer) throws XMLStreamException { - writer.writeComment(reader.getText()); - } - - /** - * @param reader - * @param writer - * @throws XMLStreamException - */ - protected void serializeElement(XMLStreamReader reader, XMLStreamWriter writer) throws XMLStreamException { - writeStartElement(writer, reader.getName()); - - // add the namespaces - int count = reader.getNamespaceCount(); - String namespacePrefix; - for (int i = 0; i < count; i++) { - namespacePrefix = reader.getNamespacePrefix(i); - serializeNamespace(namespacePrefix, reader.getNamespaceURI(i), writer); - } - - // add attributes - serializeAttributes(reader, writer); - - } - - public void writeStartElement(XMLStreamWriter writer, QName name) throws XMLStreamException { - writeStartElement(writer, name.getPrefix(), name.getLocalPart(), name.getNamespaceURI()); - } - - public void writeStartElement(XMLStreamWriter writer, String prefix, String localName, String namespaceURI) - throws XMLStreamException { - - if (namespaceURI == null) { - namespaceURI = NULL_NS_URI; - } - if (prefix == null) { - prefix = DEFAULT_NS_PREFIX; - } - - if (isRepairingNamespaces) { - writer.writeStartElement(prefix, localName, namespaceURI); - return; - } - - String writerPrefix = writer.getPrefix(namespaceURI); - if (writerPrefix != null) { - // Namespace is bound - writer.writeStartElement(writerPrefix, localName, namespaceURI); - } else { - // Namespace is not bound - if (NULL_NS_URI.equals(namespaceURI)) { - writer.writeStartElement(localName); - String defaultNS = writer.getNamespaceContext().getNamespaceURI(DEFAULT_NS_PREFIX); - if (defaultNS != null && !NULL_NS_URI.equals(defaultNS)) { - writer.writeNamespace(prefix, namespaceURI); - } - } else { - writer.writeStartElement(prefix, localName, namespaceURI); - // writeNamespace() will call setPrefix() - writer.writeNamespace(prefix, namespaceURI); - } - } - } - - /** - * Method serializeEndElement. - * - * @param writer - * @throws XMLStreamException - */ - protected void serializeEndElement(XMLStreamWriter writer) throws XMLStreamException { - writer.writeEndElement(); - } - - /** - * Method serializeNamespace. - * - * @param prefix - * @param uri - * @param writer - * @throws XMLStreamException - */ - private void serializeNamespace(String prefix, String uri, XMLStreamWriter writer) throws XMLStreamException { - writeNamespace(writer, prefix, uri); - } - - public String writeNamespace(XMLStreamWriter writer, String prefix, String uri) throws XMLStreamException { - if (uri == null) { - uri = NULL_NS_URI; - } - String prefix1 = writer.getPrefix(uri); - if (prefix1 == null) { - if (prefix == null) { - prefix = DEFAULT_NS_PREFIX; - } - if (DEFAULT_NS_PREFIX.equals(prefix) && !XMLConstants.NULL_NS_URI.equals(uri)) { - String ns = writer.getNamespaceContext().getNamespaceURI(prefix); - if (ns != null) { - prefix = generateUniquePrefix(writer.getNamespaceContext()); - } - } - writer.writeNamespace(prefix, uri); - return prefix; - } else { - return prefix1; - } - } - - /** - * Method serializeNode. - * - * @param reader - * @param writer - * @throws XMLStreamException - */ - protected void serializeNode(XMLStreamReader reader, XMLStreamWriter writer) throws XMLStreamException { - while (true) { - int event = reader.getEventType(); - if (event == START_ELEMENT) { - serializeElement(reader, writer); - depth++; - } else if (event == ATTRIBUTE) { - serializeAttributes(reader, writer); - } else if (event == CHARACTERS) { - serializeText(reader, writer); - } else if (event == COMMENT) { - serializeComment(reader, writer); - } else if (event == CDATA) { - serializeCData(reader, writer); - } else if (event == END_ELEMENT) { - serializeEndElement(writer); - depth--; - } else if (event == START_DOCUMENT) { - depth++; // if a start document is found then increment - writer.writeStartDocument(); - // the depth - } else if (event == END_DOCUMENT) { - if (depth != 0) { - depth--; // for the end document - reduce the depth - } - writer.writeEndDocument(); - } - if (depth == 0) { - break; - } - if (reader.hasNext()) { - reader.next(); - } else { - break; - } - } - } - - /** - * @param reader - * @param writer - * @throws XMLStreamException - */ - protected void serializeText(XMLStreamReader reader, XMLStreamWriter writer) throws XMLStreamException { - writer.writeCharacters(reader.getText()); - } -} |