diff options
Diffstat (limited to 'sca-java-1.x/trunk/modules/databinding-json-2-x/src/main/java/org/apache/tuscany/sca/databinding/json2x/axiom/JSONDataSource.java')
-rw-r--r-- | sca-java-1.x/trunk/modules/databinding-json-2-x/src/main/java/org/apache/tuscany/sca/databinding/json2x/axiom/JSONDataSource.java | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/sca-java-1.x/trunk/modules/databinding-json-2-x/src/main/java/org/apache/tuscany/sca/databinding/json2x/axiom/JSONDataSource.java b/sca-java-1.x/trunk/modules/databinding-json-2-x/src/main/java/org/apache/tuscany/sca/databinding/json2x/axiom/JSONDataSource.java new file mode 100644 index 0000000000..a0eba7a6f7 --- /dev/null +++ b/sca-java-1.x/trunk/modules/databinding-json-2-x/src/main/java/org/apache/tuscany/sca/databinding/json2x/axiom/JSONDataSource.java @@ -0,0 +1,176 @@ +/*
+ * 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.databinding.json2x.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.json.JSONObject;
+import org.codehaus.jettison.json.JSONTokener;
+import org.codehaus.jettison.mapped.MappedXMLInputFactory;
+
+/**
+ * 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.
+ *
+ * @version $Rev: 656170 $ $Date: 2008-05-14 10:17:54 +0100 (Wed, 14 May 2008) $
+ */
+
+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();
+ }
+
+}
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