diff options
Diffstat (limited to 'tags/java/sca/2.0-M4-RC3/modules/common-xml/src/main/java/org/apache/tuscany/sca/common/xml/stax/impl/XMLStreamSerializer.java')
| -rw-r--r-- | tags/java/sca/2.0-M4-RC3/modules/common-xml/src/main/java/org/apache/tuscany/sca/common/xml/stax/impl/XMLStreamSerializer.java | 368 |
1 files changed, 0 insertions, 368 deletions
diff --git a/tags/java/sca/2.0-M4-RC3/modules/common-xml/src/main/java/org/apache/tuscany/sca/common/xml/stax/impl/XMLStreamSerializer.java b/tags/java/sca/2.0-M4-RC3/modules/common-xml/src/main/java/org/apache/tuscany/sca/common/xml/stax/impl/XMLStreamSerializer.java deleted file mode 100644 index 883199e4dd..0000000000 --- a/tags/java/sca/2.0-M4-RC3/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()); - } -} |