1 files changed, 206 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/1.6.1-TUSCANY-3909/databinding-jaxb-axiom/src/main/java/org/apache/tuscany/sca/databinding/jaxb/axiom/JAXBDataSource.java b/sca-java-1.x/tags/1.6.1-TUSCANY-3909/databinding-jaxb-axiom/src/main/java/org/apache/tuscany/sca/databinding/jaxb/axiom/JAXBDataSource.java
new file mode 100644
index 0000000000..27c46cdb21
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+++ b/sca-java-1.x/tags/1.6.1-TUSCANY-3909/databinding-jaxb-axiom/src/main/java/org/apache/tuscany/sca/databinding/jaxb/axiom/JAXBDataSource.java
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+/*
+ * 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.jaxb.axiom;
+
+import java.io.OutputStream;
+import java.io.StringReader;
+import java.io.StringWriter;
+import java.io.UnsupportedEncodingException;
+import java.io.Writer;
+import java.lang.reflect.Method;
+import java.security.AccessController;
+import java.security.PrivilegedActionException;
+import java.security.PrivilegedExceptionAction;
+
+import javax.xml.bind.JAXBContext;
+import javax.xml.bind.JAXBException;
+import javax.xml.bind.Marshaller;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+import javax.xml.stream.XMLStreamWriter;
+
+import org.apache.axiom.om.OMDataSourceExt;
+import org.apache.axiom.om.OMOutputFormat;
+import org.apache.axiom.om.ds.OMDataSourceExtBase;
+import org.apache.axiom.om.impl.MTOMXMLStreamWriter;
+import org.apache.axiom.om.util.StAXUtils;
+import org.apache.tuscany.sca.databinding.jaxb.JAXBContextHelper;
+
+/**
+ *
+ * @version $Rev$ $Date$
+ */
+public class JAXBDataSource extends OMDataSourceExtBase {
+    private JAXBContext context;
+    private Object element;
+
+    public JAXBDataSource(Object element, JAXBContext context) {
+        this.element = element;
+        this.context = context;
+    }
+
+    private Marshaller getMarshaller() throws JAXBException {
+        return JAXBContextHelper.getMarshaller(context);
+    }
+
+    private void releaseMarshaller(Marshaller marshaller) {
+        JAXBContextHelper.releaseJAXBMarshaller(context, marshaller);
+    }
+
+    public XMLStreamReader getReader() throws XMLStreamException {
+        // FIXME: [rfeng] This is a quick and dirty implementation
+        // We could use the fastinfoset to optimize the roundtrip
+        StringWriter writer = new StringWriter();
+        serialize(writer, new OMOutputFormat());
+        StringReader reader = new StringReader(writer.toString());
+        return StAXUtils.createXMLStreamReader(reader);
+    }
+
+    /**
+     * If the writer is backed by an OutputStream, then return the OutputStream
+     * @param writer
+     * @return OutputStream or null
+     */
+    private static OutputStream getOutputStream(XMLStreamWriter writer) throws XMLStreamException {
+        if (writer.getClass() == MTOMXMLStreamWriter.class) {
+            return ((MTOMXMLStreamWriter)writer).getOutputStream();
+        }
+
+        try {
+            Method method = writer.getClass().getMethod("getOutputStream");
+            return (OutputStream)method.invoke(writer);
+
+        } catch (NoSuchMethodException e) {
+            return null;
+        } catch (Exception e) {
+            return null;
+        }
+    }
+
+    public void serialize(final XMLStreamWriter xmlWriter) throws XMLStreamException {
+        try {
+            // marshaller.setProperty(Marshaller.JAXB_ENCODING, format.getCharSetEncoding());
+            AccessController.doPrivileged(new PrivilegedExceptionAction<Object>() {
+                public Object run() throws Exception {
+                    Marshaller marshaller = null;
+                    try {
+                        marshaller = getMarshaller();
+                        // Marshalling directly to the output stream is faster than marshalling through the
+                        // XMLStreamWriter. Take advantage of this optimization if there is an output stream.
+                        OutputStream os = getOutputStream(xmlWriter);
+                        if (os != null) {
+                            marshaller.marshal(element, os);
+                        } else {
+                            marshaller.marshal(element, xmlWriter);
+                        }
+                    } finally {
+                        releaseMarshaller(marshaller);
+                    }
+                    return null;
+                }
+            });
+        } catch (PrivilegedActionException e) {
+            throw new XMLStreamException(e.getException());
+        }
+    }
+
+    public void serialize(final OutputStream output, OMOutputFormat format) throws XMLStreamException {
+        try {
+            // marshaller.setProperty(Marshaller.JAXB_ENCODING, format.getCharSetEncoding());
+            AccessController.doPrivileged(new PrivilegedExceptionAction<Object>() {
+                public Object run() throws Exception {
+                    Marshaller marshaller = null;
+                    try {
+                        marshaller = getMarshaller();
+                        marshaller.marshal(element, output);
+                    } finally {
+                        releaseMarshaller(marshaller);
+                    }
+                    return null;
+                }
+            });
+        } catch (PrivilegedActionException e) {
+            throw new XMLStreamException(e.getException());
+        }
+    }
+
+    public void serialize(final Writer writer, OMOutputFormat format) throws XMLStreamException {
+        try {
+            AccessController.doPrivileged(new PrivilegedExceptionAction<Object>() {
+                public Object run() throws Exception {
+                    Marshaller marshaller = null;
+                    try {
+                        marshaller = getMarshaller();
+                        marshaller.marshal(element, writer);
+                    } finally {
+                        releaseMarshaller(marshaller);
+                    }
+                    return null;
+                }
+            });
+        } catch (PrivilegedActionException e) {
+            throw new XMLStreamException(e.getException());
+        }
+    }
+
+    public Object getObject() {
+        return element;
+    }
+
+    public void close() {
+    }
+
+    public OMDataSourceExt copy() {
+        return new JAXBDataSource(element, context);
+    }
+
+    public byte[] getXMLBytes(final String encoding) throws UnsupportedEncodingException {
+        try {
+            return AccessController.doPrivileged(new PrivilegedExceptionAction<byte[]>() {
+                public byte[] run() throws JAXBException, XMLStreamException, UnsupportedEncodingException {
+                    Marshaller marshaller = null;
+                    try {
+                        StringWriter sw = new StringWriter();
+                        marshaller = getMarshaller();
+                        marshaller.marshal(element, sw);
+                        return sw.toString().getBytes(encoding);
+                    } finally {
+                        releaseMarshaller(marshaller);
+                    }
+                }
+            });
+        } catch (PrivilegedActionException e) {
+            Throwable t = e.getCause();
+            if (t instanceof UnsupportedEncodingException) {
+                throw (UnsupportedEncodingException)t;
+            } else {
+                throw new RuntimeException(t);
+            }
+        }
+    }
+
+    public boolean isDestructiveRead() {
+        return false;
+    }
+
+    public boolean isDestructiveWrite() {
+        return false;
+    }
+
+}