diff options
Diffstat (limited to 'sandbox/old/contrib/databinding-json/src/main/java')
7 files changed, 768 insertions, 0 deletions
diff --git a/sandbox/old/contrib/databinding-json/src/main/java/org/apache/tuscany/databinding/json/JSON2XMLStreamReader.java b/sandbox/old/contrib/databinding-json/src/main/java/org/apache/tuscany/databinding/json/JSON2XMLStreamReader.java new file mode 100644 index 0000000000..e48e8dbf27 --- /dev/null +++ b/sandbox/old/contrib/databinding-json/src/main/java/org/apache/tuscany/databinding/json/JSON2XMLStreamReader.java @@ -0,0 +1,62 @@ +/* + * 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.databinding.json; + +import javax.xml.stream.XMLStreamReader; + +import org.apache.tuscany.spi.databinding.PullTransformer; +import org.apache.tuscany.spi.databinding.TransformationContext; +import org.apache.tuscany.spi.databinding.TransformationException; +import org.apache.tuscany.spi.databinding.Transformer; +import org.apache.tuscany.spi.databinding.extension.TransformerExtension; +import org.codehaus.jettison.badgerfish.BadgerFishXMLStreamReader; +import org.json.JSONObject; +import org.osoa.sca.annotations.Service; + +/** + * @version $Rev$ $Date$ + */ +@Service(Transformer.class) +public class JSON2XMLStreamReader extends TransformerExtension<JSONObject, XMLStreamReader> implements + PullTransformer<JSONObject, XMLStreamReader> { + + @Override + protected Class getSourceType() { + return JSONObject.class; + } + + @Override + protected Class getTargetType() { + return XMLStreamReader.class; + } + + public XMLStreamReader transform(JSONObject source, TransformationContext context) { + try { + return new BadgerFishXMLStreamReader(source); + } catch (Exception e) { + throw new TransformationException(e); + } + } + + public int getWeight() { + return 10; + } + +} diff --git a/sandbox/old/contrib/databinding-json/src/main/java/org/apache/tuscany/databinding/json/JSONDataBinding.java b/sandbox/old/contrib/databinding-json/src/main/java/org/apache/tuscany/databinding/json/JSONDataBinding.java new file mode 100644 index 0000000000..2cc8c1da37 --- /dev/null +++ b/sandbox/old/contrib/databinding-json/src/main/java/org/apache/tuscany/databinding/json/JSONDataBinding.java @@ -0,0 +1,52 @@ +/* + * 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.databinding.json; + +import javax.xml.namespace.QName; + +import org.apache.tuscany.spi.databinding.extension.DataBindingExtension; +import org.json.JSONObject; + +/** + * JAXB DataBinding + */ +public class JSONDataBinding extends DataBindingExtension { + public static final String NAME = JSONObject.class.getName(); + public static final String[] ALIASES = new String[] {"json"}; + + public static final String ROOT_NAMESPACE = "http://tuscany.apache.org/xmlns/sca/databinding/json/1.0"; + public static final QName ROOT_ELEMENT = new QName(ROOT_NAMESPACE, "root"); + + public JSONDataBinding() { + super(NAME, ALIASES, JSONObject.class); + } + + @SuppressWarnings("unchecked") + @Override + public Object copy(Object arg) { + try { + JSONObject src = (JSONObject)arg; + return new JSONObject(src.toString()); + } catch (Exception e) { + throw new IllegalArgumentException(e); + } + } + +} diff --git a/sandbox/old/contrib/databinding-json/src/main/java/org/apache/tuscany/databinding/json/XMLStreamReader2JSON.java b/sandbox/old/contrib/databinding-json/src/main/java/org/apache/tuscany/databinding/json/XMLStreamReader2JSON.java new file mode 100644 index 0000000000..872fe1cff3 --- /dev/null +++ b/sandbox/old/contrib/databinding-json/src/main/java/org/apache/tuscany/databinding/json/XMLStreamReader2JSON.java @@ -0,0 +1,69 @@ +/* + * 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.databinding.json; + +import java.io.StringWriter; + +import javax.xml.stream.XMLStreamReader; +import javax.xml.stream.XMLStreamWriter; + +import org.apache.tuscany.spi.databinding.PullTransformer; +import org.apache.tuscany.spi.databinding.TransformationContext; +import org.apache.tuscany.spi.databinding.TransformationException; +import org.apache.tuscany.spi.databinding.Transformer; +import org.apache.tuscany.spi.databinding.extension.TransformerExtension; +import org.codehaus.jettison.badgerfish.BadgerFishXMLStreamWriter; +import org.json.JSONObject; +import org.osoa.sca.annotations.Service; + +/** + * @version $Rev$ $Date$ + */ +@Service(Transformer.class) +public class XMLStreamReader2JSON extends TransformerExtension<XMLStreamReader, JSONObject> implements + PullTransformer<XMLStreamReader, JSONObject> { + + @Override + protected Class getSourceType() { + return XMLStreamReader.class; + } + + @Override + protected Class getTargetType() { + return JSONObject.class; + } + + public JSONObject transform(XMLStreamReader source, TransformationContext context) { + try { + StringWriter writer = new StringWriter(); + XMLStreamWriter jsonWriter = new BadgerFishXMLStreamWriter(writer); + XMLStreamSerializer serializer = new XMLStreamSerializer(); + serializer.serialize(source, jsonWriter); + return new JSONObject(writer.toString()); + } catch (Exception e) { + throw new TransformationException(e); + } + } + + public int getWeight() { + return 10; + } + +} diff --git a/sandbox/old/contrib/databinding-json/src/main/java/org/apache/tuscany/databinding/json/XMLStreamSerializer.java b/sandbox/old/contrib/databinding-json/src/main/java/org/apache/tuscany/databinding/json/XMLStreamSerializer.java new file mode 100644 index 0000000000..74c39cba0f --- /dev/null +++ b/sandbox/old/contrib/databinding-json/src/main/java/org/apache/tuscany/databinding/json/XMLStreamSerializer.java @@ -0,0 +1,272 @@ +package org.apache.tuscany.databinding.json; + +import javax.xml.namespace.NamespaceContext; +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 + */ +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 serilizer and tells it when to return. Note that it is assumed + * that this serialization starts on an Element. + */ + + /** + * Field depth + */ + private int depth; + + /** + * 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 writerPrefix; + for (int i = 0; i < count; i++) { + prefix = reader.getAttributePrefix(i); + namespaceName = reader.getAttributeNamespace(i); + /* + * 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 (namespaceName == null) { + namespaceName = ""; + } + + 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)); + } + + } + } + + /** + * 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 { + String prefix = reader.getPrefix(); + String nameSpaceName = reader.getNamespaceURI(); + if (nameSpaceName != null) { + String writerPrefix = writer.getPrefix(nameSpaceName); + if (writerPrefix != 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 { + // [rfeng] We need to set default NS 1st before calling writeStateElement + writer.setDefaultNamespace(nameSpaceName); + writer.writeStartElement(nameSpaceName, reader.getLocalName()); + writer.writeDefaultNamespace(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); + // [rfeng] The following is commented out to allow to default ns + // 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 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); + } + } + + /** + * 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 (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()); + } +} diff --git a/sandbox/old/contrib/databinding-json/src/main/java/org/apache/tuscany/databinding/json/axiom/JSON2OMElement.java b/sandbox/old/contrib/databinding-json/src/main/java/org/apache/tuscany/databinding/json/axiom/JSON2OMElement.java new file mode 100644 index 0000000000..2856873d7c --- /dev/null +++ b/sandbox/old/contrib/databinding-json/src/main/java/org/apache/tuscany/databinding/json/axiom/JSON2OMElement.java @@ -0,0 +1,83 @@ +/* + * 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.databinding.json.axiom; + +import org.apache.axiom.om.OMAbstractFactory; +import org.apache.axiom.om.OMElement; +import org.apache.axiom.om.OMFactory; +import org.apache.axiom.om.OMNamespace; +import org.apache.tuscany.databinding.json.JSONDataBinding; +import org.apache.tuscany.spi.databinding.PullTransformer; +import org.apache.tuscany.spi.databinding.TransformationContext; +import org.apache.tuscany.spi.databinding.TransformationException; +import org.apache.tuscany.spi.databinding.Transformer; +import org.apache.tuscany.spi.databinding.extension.TransformerExtension; +import org.apache.tuscany.spi.model.DataType; +import org.apache.tuscany.spi.model.XMLType; +import org.json.JSONObject; +import org.osoa.sca.annotations.Service; + +/** + * @version $Rev$ $Date$ + */ +@Service(Transformer.class) +public class JSON2OMElement extends TransformerExtension<JSONObject, OMElement> implements + PullTransformer<JSONObject, OMElement> { + + private OMFactory factory = OMAbstractFactory.getOMFactory(); + + @Override + protected Class getSourceType() { + return JSONObject.class; + } + + @Override + protected Class getTargetType() { + return OMElement.class; + } + + public OMElement transform(JSONObject source, TransformationContext context) { + try { + String ns = JSONDataBinding.ROOT_ELEMENT.getNamespaceURI(); + String name = JSONDataBinding.ROOT_ELEMENT.getLocalPart(); + if (context != null) { + DataType<?> dataType = context.getTargetDataType(); + Object logical = dataType.getLogical(); + if (logical instanceof XMLType) { + XMLType xmlType = (XMLType)logical; + if (xmlType.isElement()) { + ns = xmlType.getElementName().getNamespaceURI(); + name = xmlType.getElementName().getLocalPart(); + } + } + } + JSONBadgerfishDataSource ds = new JSONBadgerfishDataSource(source); + OMNamespace namespace = factory.createOMNamespace(ns, ""); + return factory.createOMElement(ds, name, namespace); + } catch (Exception e) { + throw new TransformationException(e); + } + } + + public int getWeight() { + return 10; + } + +} diff --git a/sandbox/old/contrib/databinding-json/src/main/java/org/apache/tuscany/databinding/json/axiom/JSONBadgerfishDataSource.java b/sandbox/old/contrib/databinding-json/src/main/java/org/apache/tuscany/databinding/json/axiom/JSONBadgerfishDataSource.java new file mode 100644 index 0000000000..22476b10af --- /dev/null +++ b/sandbox/old/contrib/databinding-json/src/main/java/org/apache/tuscany/databinding/json/axiom/JSONBadgerfishDataSource.java @@ -0,0 +1,56 @@ +/* + * 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.databinding.json.axiom; + +import javax.xml.stream.XMLStreamException; + +import org.codehaus.jettison.badgerfish.BadgerFishXMLStreamReader; +import org.json.JSONException; +import org.json.JSONObject; + +/** + * JSONDataSource keeps the JSON String inside and consumes it when needed. This is to be kept in the + * OMSourcedElementImpl and can be used either to expand the tree or get the JSON String directly without expanding. + * This uses the "Badgerfish" JSON convention. + * + * @version $Rev$ $Date$ + */ + +public class JSONBadgerfishDataSource extends JSONDataSource { + + public JSONBadgerfishDataSource(JSONObject json) { + super(json); + } + + /** + * Gives the StAX reader using the "Badgerfish" formatted input JSON String. + * + * @return The XMLStreamReader according to the JSON String. + * @throws javax.xml.stream.XMLStreamException if there is an error while making the StAX reader. + */ + public javax.xml.stream.XMLStreamReader getReader() throws XMLStreamException { + try { + return new BadgerFishXMLStreamReader(json); + } catch (JSONException e) { + throw new XMLStreamException(e); + } + + } +} diff --git a/sandbox/old/contrib/databinding-json/src/main/java/org/apache/tuscany/databinding/json/axiom/JSONDataSource.java b/sandbox/old/contrib/databinding-json/src/main/java/org/apache/tuscany/databinding/json/axiom/JSONDataSource.java new file mode 100644 index 0000000000..744c5a407e --- /dev/null +++ b/sandbox/old/contrib/databinding-json/src/main/java/org/apache/tuscany/databinding/json/axiom/JSONDataSource.java @@ -0,0 +1,174 @@ +/* + * 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.databinding.json.axiom; + +import java.io.IOException; +import java.io.OutputStream; +import java.io.Writer; +import java.util.HashMap; +import java.util.Map; + +import javax.xml.stream.XMLStreamConstants; +import javax.xml.stream.XMLStreamReader; + +import org.apache.axiom.om.OMDataSource; +import org.apache.axiom.om.OMException; +import org.apache.axiom.om.OMOutputFormat; +import org.codehaus.jettison.mapped.MappedXMLInputFactory; +import org.json.JSONObject; +import org.json.JSONTokener; + +/** + * JSONDataSource keeps the JSON String inside and consumes it when needed. This is to be kept in the + * OMSourcedElementImpl and can be used either to expand the tree or get the JSON String directly without expanding. + * This uses the "Mapped" JSON convention. + */ + +public class JSONDataSource implements OMDataSource { + protected JSONObject json; + + public JSONDataSource(JSONObject json) { + this.json = json; + } + + /** + * Writes JSON into the output stream. As this should write JSON, it directly gets the JSON string and writes it + * without expanding the tree. + * + * @param outputStream the stream to be written into + * @param omOutputFormat format of the message, this is ignored. + * @throws javax.xml.stream.XMLStreamException if there is an error while writing the message in to the output + * stream. + */ + public void serialize(OutputStream outputStream, OMOutputFormat omOutputFormat) + throws javax.xml.stream.XMLStreamException { + try { + String encoding = omOutputFormat == null ? "UTF-8" : omOutputFormat.getCharSetEncoding(); + outputStream.write(getJSONString().getBytes(encoding)); + } catch (IOException e) { + throw new OMException(); + } + } + + /** + * Writes JSON through the writer. As this should write JSON, it directly gets the JSON string and writes it without + * expanding the tree. + * + * @param writer Writer to be written into + * @param omOutputFormat format of the message, this is ignored. + * @throws javax.xml.stream.XMLStreamException if there is an error while writing the message through the writer. + */ + public void serialize(Writer writer, OMOutputFormat omOutputFormat) throws javax.xml.stream.XMLStreamException { + try { + writer.write(getJSONString()); + } catch (IOException e) { + throw new OMException(); + } + } + + /** + * Writes XML through the XMLStreamWriter. As the input data source is JSON, this method needs to get a StAX reader + * from that JSON String. Therefore this uses the getReader() method to get the StAX reader writes the events into + * the XMLStreamWriter. + * + * @param xmlStreamWriter StAX writer to be written into + * @throws javax.xml.stream.XMLStreamException if there is an error while writing the message through the StAX + * writer. + */ + public void serialize(javax.xml.stream.XMLStreamWriter xmlStreamWriter) throws javax.xml.stream.XMLStreamException { + XMLStreamReader reader = getReader(); + xmlStreamWriter.writeStartDocument(); + while (reader.hasNext()) { + int x = reader.next(); + switch (x) { + case XMLStreamConstants.START_ELEMENT: + xmlStreamWriter.writeStartElement(reader.getPrefix(), reader.getLocalName(), reader + .getNamespaceURI()); + int namespaceCount = reader.getNamespaceCount(); + for (int i = namespaceCount - 1; i >= 0; i--) { + xmlStreamWriter.writeNamespace(reader.getNamespacePrefix(i), reader.getNamespaceURI(i)); + } + int attributeCount = reader.getAttributeCount(); + for (int i = 0; i < attributeCount; i++) { + xmlStreamWriter.writeAttribute(reader.getAttributePrefix(i), + reader.getAttributeNamespace(i), + reader.getAttributeLocalName(i), + reader.getAttributeValue(i)); + } + break; + case XMLStreamConstants.START_DOCUMENT: + break; + case XMLStreamConstants.CHARACTERS: + xmlStreamWriter.writeCharacters(reader.getText()); + break; + case XMLStreamConstants.CDATA: + xmlStreamWriter.writeCData(reader.getText()); + break; + case XMLStreamConstants.END_ELEMENT: + xmlStreamWriter.writeEndElement(); + break; + case XMLStreamConstants.END_DOCUMENT: + xmlStreamWriter.writeEndDocument(); + break; + case XMLStreamConstants.SPACE: + break; + case XMLStreamConstants.COMMENT: + xmlStreamWriter.writeComment(reader.getText()); + break; + case XMLStreamConstants.DTD: + xmlStreamWriter.writeDTD(reader.getText()); + break; + case XMLStreamConstants.PROCESSING_INSTRUCTION: + xmlStreamWriter.writeProcessingInstruction(reader.getPITarget(), reader.getPIData()); + break; + case XMLStreamConstants.ENTITY_REFERENCE: + xmlStreamWriter.writeEntityRef(reader.getLocalName()); + break; + default: + throw new OMException(); + } + } + xmlStreamWriter.writeEndDocument(); + } + + /** + * Gives the StAX reader using the "Mapped" formatted input JSON String. + * + * @return The XMLStreamReader according to the JSON String. + * @throws javax.xml.stream.XMLStreamException if there is an error while making the StAX reader. + */ + + public javax.xml.stream.XMLStreamReader getReader() throws javax.xml.stream.XMLStreamException { + + Map<String, String> nsMap = new HashMap<String, String>(); + nsMap.put("", ""); + + // input factory for "Mapped" convention + MappedXMLInputFactory inputFactory = new MappedXMLInputFactory(nsMap); + String jsonString = this.getJSONString(); + return inputFactory.createXMLStreamReader(new JSONTokener(jsonString)); + } + + // returns the json string by consuming the JSON input stream. + protected String getJSONString() { + return json.toString(); + } + +} |