1 files changed, 132 insertions, 0 deletions
diff --git a/branches/sca-java-integration/sca/kernel/core/src/main/java/org/apache/tuscany/core/services/deployment/XMLChangeSetHandler.java b/branches/sca-java-integration/sca/kernel/core/src/main/java/org/apache/tuscany/core/services/deployment/XMLChangeSetHandler.java
new file mode 100644
index 0000000000..87f68340e2
--- /dev/null
+++ b/branches/sca-java-integration/sca/kernel/core/src/main/java/org/apache/tuscany/core/services/deployment/XMLChangeSetHandler.java
@@ -0,0 +1,132 @@
+/*
+ * 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.core.services.deployment;
+
+import java.io.IOException;
+import java.io.InputStream;
+import javax.xml.namespace.QName;
+import javax.xml.stream.XMLInputFactory;
+import static javax.xml.stream.XMLStreamConstants.END_DOCUMENT;
+import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
+import static javax.xml.stream.XMLStreamConstants.START_ELEMENT;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+
+import org.apache.tuscany.spi.bootstrap.RuntimeComponent;
+import org.apache.tuscany.spi.builder.Builder;
+import org.apache.tuscany.spi.builder.BuilderException;
+import org.apache.tuscany.spi.component.Component;
+import org.apache.tuscany.spi.component.ComponentRegistrationException;
+import org.apache.tuscany.spi.component.CompositeComponent;
+import org.apache.tuscany.spi.component.PrepareException;
+import org.apache.tuscany.spi.deployer.ChangeSetHandler;
+import org.apache.tuscany.spi.deployer.DeploymentContext;
+import org.apache.tuscany.spi.loader.Loader;
+import org.apache.tuscany.spi.loader.LoaderException;
+import org.apache.tuscany.spi.model.ComponentDefinition;
+
+import org.apache.tuscany.core.deployer.RootDeploymentContext;
+import org.apache.tuscany.host.deployment.ContentTypes;
+import org.apache.tuscany.host.deployment.DeploymentException;
+
+/**
+ * @version $Rev$ $Date$
+ */
+public class XMLChangeSetHandler implements ChangeSetHandler {
+    private static final String NS = "http://tuscany.apache.org/xmlns/1.0-SNAPSHOT";
+    private static final QName CHANGESET = new QName(NS, "changeSet");
+    private static final QName CREATECOMPONENT = new QName(NS, "createComponent");
+
+    private final RuntimeComponent runtime;
+    private final Builder builder;
+    private final Loader loader;
+    private final XMLInputFactory xmlFactory;
+
+    public XMLChangeSetHandler(RuntimeComponent runtime, Loader loader, Builder builder) {
+        this.runtime = runtime;
+        this.loader = loader;
+        this.builder = builder;
+        xmlFactory = XMLInputFactory.newInstance("javax.xml.stream.XMLInputFactory", getClass().getClassLoader());
+    }
+
+    public String getContentType() {
+        return ContentTypes.CHANGESET_XML;
+    }
+
+    public void applyChanges(InputStream changeSet) throws DeploymentException, IOException {
+        try {
+            XMLStreamReader xmlReader = xmlFactory.createXMLStreamReader(changeSet);
+            while (true) {
+                switch (xmlReader.next()) {
+                    case START_ELEMENT:
+                        if (!CHANGESET.equals(xmlReader.getName())) {
+                            throw new InvalidDocumentException(xmlReader.getName().toString());
+                        }
+                        processChanges(xmlReader);
+                        break;
+                    case END_DOCUMENT:
+                        return;
+                }
+            }
+        } catch (XMLStreamException e) {
+            throw (IOException) new IOException(e.getMessage()).initCause(e);
+        }
+    }
+
+    public void processChanges(XMLStreamReader xmlReader) throws XMLStreamException, DeploymentException {
+        while (true) {
+            switch (xmlReader.next()) {
+                case START_ELEMENT:
+                    if (CREATECOMPONENT.equals(xmlReader.getName())) {
+                        createComponent(xmlReader);
+                    } else {
+                        // reject unrecognized commands
+                        throw new InvalidDocumentException(xmlReader.getName().toString());
+                    }
+                    break;
+                case END_ELEMENT:
+                    return;
+            }
+        }
+    }
+
+    public void createComponent(XMLStreamReader xmlReader) throws XMLStreamException {
+        DeploymentContext deploymentContext = new RootDeploymentContext(null, xmlFactory, null, null);
+        CompositeComponent parent = runtime.getRootComponent();
+        try {
+            ComponentDefinition<?> componentDefinition =
+                (ComponentDefinition<?>) loader.load(parent, null, xmlReader, deploymentContext);
+            Component component = builder.build(parent, componentDefinition, deploymentContext);
+            component.prepare();
+            parent.register(component);
+        } catch (LoaderException e) {
+            // FIXME throw something appropriate
+            throw new AssertionError("FIXME");
+        } catch (BuilderException e) {
+            // FIXME throw something appropriate
+            throw new AssertionError("FIXME");
+        } catch (PrepareException e) {
+            // FIXME throw something appropriate
+            throw new AssertionError("FIXME");
+        } catch (ComponentRegistrationException e) {
+            // FIXME throw something appropriate
+            throw new AssertionError("FIXME");
+        }
+    }
+}