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Diffstat (limited to 'branches/sdo-1.0-incubating/impl/src/main/java/org/apache/tuscany/sdo/util/resource/XMLStreamSerializer.java')
| -rw-r--r-- | branches/sdo-1.0-incubating/impl/src/main/java/org/apache/tuscany/sdo/util/resource/XMLStreamSerializer.java | 414 |
1 files changed, 0 insertions, 414 deletions
diff --git a/branches/sdo-1.0-incubating/impl/src/main/java/org/apache/tuscany/sdo/util/resource/XMLStreamSerializer.java b/branches/sdo-1.0-incubating/impl/src/main/java/org/apache/tuscany/sdo/util/resource/XMLStreamSerializer.java deleted file mode 100644 index 2c2dc87aa4..0000000000 --- a/branches/sdo-1.0-incubating/impl/src/main/java/org/apache/tuscany/sdo/util/resource/XMLStreamSerializer.java +++ /dev/null @@ -1,414 +0,0 @@ -/* - * Copyright 2004,2005 The Apache Software Foundation. - * - * Licensed 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.sdo.util.resource; - -import java.util.Map; -import javax.xml.namespace.NamespaceContext; -import javax.xml.stream.XMLOutputFactory; -import javax.xml.stream.XMLStreamConstants; -import javax.xml.stream.XMLStreamException; -import javax.xml.stream.XMLStreamReader; -import javax.xml.stream.XMLStreamWriter; - -import org.apache.tuscany.sdo.api.SDOHelper; -import org.apache.tuscany.sdo.api.SDOUtil; -/** - * The XMLStreamSerializer pulls events from the XMLStreamReader and dumps into the XMLStreamWriter - */ -public class XMLStreamSerializer implements XMLStreamConstants { - - private static int namespaceSuffix = 0; - - public static final String NAMESPACE_PREFIX = "ns"; - - /* - * 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 serilizer and tells it when to return. Note that it is assumed that this serialization starts on an Element. - */ - - /** - * Field depth - */ - private int depth = 0; - - /** - * Method serialize. - * - * @param node - * @param writer - * @throws XMLStreamException - */ - public void serialize(XMLStreamReader node, XMLStreamWriter writer) throws XMLStreamException { - serializeNode(node, writer); - } - - public void serialize(XMLStreamReader node, XMLStreamWriter writer, Map options) throws XMLStreamException { - this.options = options; - serializeNode(node, writer); - } - /** - * Method serializeNode. - * - * @param reader - * @param writer - * @throws XMLStreamException - */ - protected void serializeNode(XMLStreamReader reader, XMLStreamWriter writer) throws XMLStreamException { - // TODO We get the StAXWriter at this point and uses it hereafter assuming that this is the only entry point to this class. - // If there can be other classes calling methodes of this we might need to change methode signatures to OMOutputer - while (reader.hasNext()) { - int event = reader.next(); - if (event == START_ELEMENT) { - if(options == null){ - serializeElement(reader, writer); - } - else{ - serializeElementWithOptions(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) { - if(options == null){ - serializeEndElement(writer); - }else{ - serializeEndElementWithOptions(writer); - } - depth--; - } else if (event == START_DOCUMENT) { - depth++; // if a start document is found then increment the depth - } else if (event == END_DOCUMENT) { - if (depth != 0) - depth--; // for the end document - reduce the depth - try { - if(options == null){ - serializeEndElement(writer); - } - else{ - serializeEndElementWithOptions(writer); - } - } catch (Exception e) { - // TODO: log exceptions - } - } - if (depth == 0) { - break; - } - } - } - - /** - * @param reader - * @param writer - * @throws XMLStreamException - */ - protected void serializeElement(XMLStreamReader reader, XMLStreamWriter writer) throws XMLStreamException { - String prefix = reader.getPrefix(); - String nameSpaceName = reader.getNamespaceURI(); - if (nameSpaceName != null) { - String writer_prefix = writer.getPrefix(nameSpaceName); - if (writer_prefix != null) { - writer.writeStartElement(nameSpaceName, reader.getLocalName()); - } else { - if (prefix != null) { - writer.writeStartElement(prefix, reader.getLocalName(), nameSpaceName); - writer.writeNamespace(prefix, nameSpaceName); - writer.setPrefix(prefix, nameSpaceName); - } else { - writer.writeStartElement(nameSpaceName, reader.getLocalName()); - writer.writeDefaultNamespace(nameSpaceName); - writer.setDefaultNamespace(nameSpaceName); - } - } - } else { - writer.writeStartElement(reader.getLocalName()); - } - - // add the namespaces - int count = reader.getNamespaceCount(); - String namespacePrefix; - for (int i = 0; i < count; i++) { - namespacePrefix = reader.getNamespacePrefix(i); - if (namespacePrefix != null && namespacePrefix.length() == 0) - continue; - - serializeNamespace(namespacePrefix, reader.getNamespaceURI(i), writer); - } - - // add attributes - serializeAttributes(reader, writer); - - } - /** - * @param reader - * @param writer - * @throws XMLStreamException - */ - protected void serializeElementWithOptions(XMLStreamReader reader, XMLStreamWriter writer) throws XMLStreamException { - ++nest; - boolean brk=false; - if(oldNest != nest){ - if(oldNest < nest) brk = true; - oldNest = nest; - } - startElement(writer); - String prefix = reader.getPrefix(); - String nameSpaceName = reader.getNamespaceURI(); - if (nameSpaceName != null) { - String writer_prefix = writer.getPrefix(nameSpaceName); - - if (writer_prefix != null) { - if(brk && nest != 1){ - breakLine(writer, true, true); - } - else{ - breakLine(writer, false, true); - } - - writer.writeStartElement(nameSpaceName, reader.getLocalName()); - } else { - if (prefix != null) { - if(brk && nest == 1){ - breakLine(writer, false, true); - } - writer.writeStartElement(prefix, reader.getLocalName(), nameSpaceName); - writer.writeNamespace(prefix, nameSpaceName); - writer.setPrefix(prefix, nameSpaceName); - } else { - if(brk && nest == 1){ - breakLine(writer, false, true); - } - writer.writeStartElement(nameSpaceName, reader.getLocalName()); - writer.writeDefaultNamespace(nameSpaceName); - writer.setDefaultNamespace(nameSpaceName); - if(brk && nest == 1){ - breakLine(writer, false, true); - } - } - } - } else { - writer.writeStartElement(reader.getLocalName()); - } - - // add the namespaces - int count = reader.getNamespaceCount(); - String namespacePrefix; - for (int i = 0; i < count; i++) { - namespacePrefix = reader.getNamespacePrefix(i); - if (namespacePrefix != null && namespacePrefix.length() == 0) - continue; - - serializeNamespace(namespacePrefix, reader.getNamespaceURI(i), writer); - } - - // add attributes - serializeAttributes(reader, writer); - } - /** - * Method serializeEndElement. - * - * @param writer - * @throws XMLStreamException - */ - protected void serializeEndElement(XMLStreamWriter writer) throws XMLStreamException { - writer.writeEndElement(); - } - - /** - * Method serializeEndElement. - * - * @param writer - * @throws XMLStreamException - */ - protected void serializeEndElementWithOptions(XMLStreamWriter writer) throws XMLStreamException { - --nest; - if(oldNest > nest+1){ - nest++; - breakLine(writer, false, true); - writer.writeEndElement(); - breakLine(writer, true, false); - nest--; - } - else{ - writer.writeEndElement(); - breakLine(writer, true, false); - } - } - /** - * @param reader - * @param writer - * @throws XMLStreamException - */ - protected void serializeText(XMLStreamReader reader, XMLStreamWriter writer) throws XMLStreamException { - writer.writeCharacters(reader.getText()); - } - - /** - * 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 serializeAttributes(XMLStreamReader reader, XMLStreamWriter writer) - throws XMLStreamException { - int count = reader.getAttributeCount(); - String prefix = null; - String namespaceName = null; - String writerPrefix = null; - for (int i = 0; i < count; i++) { - prefix = reader.getAttributePrefix(i); - namespaceName = reader.getAttributeNamespace(i); - if (namespaceName != null) { - writerPrefix = writer.getNamespaceContext().getPrefix(namespaceName); - } - - if (!"".equals(namespaceName)) { - // prefix has already being declared but this particular attrib - // has a - // no prefix attached. So use the prefix provided by the writer - if (writerPrefix != null && (prefix == null || prefix.equals(""))) { - writer.writeAttribute(writerPrefix, - namespaceName, - reader.getAttributeLocalName(i), - reader.getAttributeValue(i)); - - // writer prefix is available but different from the current - // prefix of the attrib. We should be decalring the new - // prefix - // as a namespace declaration - } else if (prefix != null && !"".equals(prefix) && !prefix.equals(writerPrefix)) { - writer.writeNamespace(prefix, namespaceName); - writer.writeAttribute(prefix, namespaceName, reader.getAttributeLocalName(i), reader - .getAttributeValue(i)); - - // 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 - } else if (prefix == null || prefix.equals("")) { - prefix = generateUniquePrefix(writer.getNamespaceContext()); - writer.writeNamespace(prefix, namespaceName); - writer.writeAttribute(prefix, namespaceName, reader.getAttributeLocalName(i), reader - .getAttributeValue(i)); - } else { - writer.writeAttribute(prefix, namespaceName, reader.getAttributeLocalName(i), reader - .getAttributeValue(i)); - } - } else { - // empty namespace is equal to no namespace! - writer.writeAttribute(reader.getAttributeLocalName(i), reader.getAttributeValue(i)); - } - - } - } - - /** - * 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 serializeNamespace. - * - * @param prefix - * @param URI - * @param writer - * @throws XMLStreamException - */ - private void serializeNamespace(String prefix, String URI, XMLStreamWriter writer) throws XMLStreamException { - String prefix1 = writer.getPrefix(URI); - if (prefix1 == null) { - writer.writeNamespace(prefix, URI); - writer.setPrefix(prefix, URI); - } - } - private String lineBreak, indent, margin = null; - - private int nest; - private int oldNest; - - private void breakLine(XMLStreamWriter writer, boolean breakLine, boolean others) throws XMLStreamException { - if (options == null || (lineBreak==null && indent==null && margin==null) ) - return; - if(breakLine) - writer.writeCharacters(lineBreak); - - if (margin != null){ - if(others) - writer.writeCharacters(margin); - } - - if (indent != null && others){ - for (int count = nest; count != 1; --count){//!= 0 - writer.writeCharacters(indent); - } - } - } - - private Map options; - - static private final String STRING_OPTION = "String option"; - - void startElement(XMLStreamWriter writer) throws XMLStreamException { - if (options == null) - return; - lineBreak = (String) options.get(SDOHelper.XMLOptions.XML_SAVE_LINE_BREAK); - if (lineBreak == null) - return; - margin = (String) options.get(SDOHelper.XMLOptions.XML_SAVE_MARGIN); - indent = (String) options.get(SDOHelper.XMLOptions.XML_SAVE_INDENT); - } -} |