1 files changed, 165 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/java-M1-final/java/sca/containers/container.java/src/main/java/org/apache/tuscany/container/java/loader/JavaImplementationLoader.java b/sca-java-1.x/tags/java-M1-final/java/sca/containers/container.java/src/main/java/org/apache/tuscany/container/java/loader/JavaImplementationLoader.java
new file mode 100644
index 0000000000..db3dd07c98
--- /dev/null
+++ b/sca-java-1.x/tags/java-M1-final/java/sca/containers/container.java/src/main/java/org/apache/tuscany/container/java/loader/JavaImplementationLoader.java
@@ -0,0 +1,165 @@
+/**
+ *
+ * Copyright 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.container.java.loader;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import javax.xml.namespace.QName;
+import javax.xml.stream.XMLInputFactory;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+
+import org.apache.tuscany.common.resource.ResourceLoader;
+import org.apache.tuscany.container.java.assembly.JavaAssemblyFactory;
+import org.apache.tuscany.container.java.assembly.JavaImplementation;
+import org.apache.tuscany.core.config.ComponentTypeIntrospector;
+import org.apache.tuscany.core.config.ConfigurationLoadException;
+import org.apache.tuscany.core.config.InvalidRootElementException;
+import org.apache.tuscany.core.config.JavaIntrospectionHelper;
+import org.apache.tuscany.core.config.SidefileLoadException;
+import org.apache.tuscany.core.config.processor.ProcessorUtils;
+import org.apache.tuscany.core.loader.LoaderContext;
+import org.apache.tuscany.core.loader.StAXElementLoader;
+import org.apache.tuscany.core.loader.StAXLoaderRegistry;
+import org.apache.tuscany.core.loader.assembly.AssemblyConstants;
+import org.apache.tuscany.core.system.annotation.Autowire;
+import org.apache.tuscany.model.assembly.ComponentType;
+import org.osoa.sca.annotations.Destroy;
+import org.osoa.sca.annotations.Init;
+import org.osoa.sca.annotations.Scope;
+
+/**
+ * @version $Rev$ $Date$
+ */
+@Scope("MODULE")
+public class JavaImplementationLoader implements StAXElementLoader<JavaImplementation> {
+    public static final QName IMPLEMENTATION_JAVA = new QName("http://www.osoa.org/xmlns/sca/0.9", "implementation.java");
+
+    private StAXLoaderRegistry registry;
+    private XMLInputFactory xmlFactory;
+
+    private JavaAssemblyFactory factory;
+    private ComponentTypeIntrospector introspector;
+
+    public JavaImplementationLoader() {
+        // todo make this a reference to a system service
+        xmlFactory = XMLInputFactory.newInstance();
+    }
+
+    @Autowire
+    public void setRegistry(StAXLoaderRegistry registry) {
+        this.registry = registry;
+    }
+
+    @Autowire
+    public void setFactory(JavaAssemblyFactory factory) {
+        this.factory = factory;
+        //FIXME JFM HACK
+        introspector = ProcessorUtils.createCoreIntrospector(factory);
+    }
+
+    @Init(eager = true)
+    public void start() {
+        registry.registerLoader(IMPLEMENTATION_JAVA, this);
+    }
+
+    @Destroy
+    public void stop() {
+        registry.unregisterLoader(IMPLEMENTATION_JAVA, this);
+    }
+
+    public JavaImplementation load(XMLStreamReader reader, LoaderContext loaderContext) throws XMLStreamException, ConfigurationLoadException {
+        JavaImplementation javaImpl = factory.createJavaImplementation();
+        String typeName = reader.getAttributeValue(null, "class");
+        Class<?> implementationClass = getImplementationClass(loaderContext.getResourceLoader(), typeName);
+        javaImpl.setImplementationClass(implementationClass);
+        javaImpl.setComponentType(loadComponentType(loaderContext, implementationClass));
+        return javaImpl;
+    }
+
+    protected Class<?> getImplementationClass(ResourceLoader resourceLoader, String typeName) throws ConfigurationLoadException {
+        ClassLoader oldCL = Thread.currentThread().getContextClassLoader();
+        try {
+            // set TCCL in case the application code needs it
+            Thread.currentThread().setContextClassLoader(resourceLoader.getClassLoader());
+            return resourceLoader.loadClass(typeName);
+        } catch (ClassNotFoundException e) {
+            throw new ConfigurationLoadException(e.getMessage(), e);
+        } finally {
+            Thread.currentThread().setContextClassLoader(oldCL);
+        }
+    }
+
+    protected ComponentType loadComponentType(LoaderContext loaderContext, Class<?> implClass) throws ConfigurationLoadException, XMLStreamException {
+        String baseName = JavaIntrospectionHelper.getBaseName(implClass);
+        URL sidefile = implClass.getResource(baseName + ".componentType");
+        if (sidefile == null) {
+            return loadComponentTypeByIntrospection(implClass);
+        } else {
+            return loadComponentTypeFromSidefile(sidefile, loaderContext);
+        }
+    }
+
+    protected ComponentType loadComponentTypeByIntrospection(Class<?> implClass) throws ConfigurationLoadException {
+        return introspector.introspect(implClass);
+    }
+
+    protected ComponentType loadComponentTypeFromSidefile(URL sidefile, LoaderContext loaderContext) throws SidefileLoadException {
+        try {
+            XMLStreamReader reader;
+            InputStream is;
+            is = sidefile.openStream();
+            try {
+                reader = xmlFactory.createXMLStreamReader(is);
+                try {
+                    reader.nextTag();
+                    if (!AssemblyConstants.COMPONENT_TYPE.equals(reader.getName())) {
+                        InvalidRootElementException e = new InvalidRootElementException(AssemblyConstants.COMPONENT_TYPE, reader.getName());
+                        e.setResourceURI(sidefile.toString());
+                        throw e;
+                    }
+                    return (ComponentType) registry.load(reader, loaderContext);
+                } finally {
+                    try {
+                        reader.close();
+                    } catch (XMLStreamException e) {
+                        // ignore
+                    }
+                }
+            } finally {
+                try {
+                    is.close();
+                } catch (IOException e) {
+                    // ignore
+                }
+            }
+        } catch (IOException e) {
+            SidefileLoadException sfe = new SidefileLoadException(e.getMessage());
+            sfe.setResourceURI(sidefile.toString());
+            throw sfe;
+        } catch (XMLStreamException e) {
+            SidefileLoadException sfe = new SidefileLoadException(e.getMessage());
+            sfe.setResourceURI(sidefile.toString());
+            throw sfe;
+        } catch (ConfigurationLoadException e) {
+            SidefileLoadException sfe = new SidefileLoadException(e.getMessage());
+            sfe.setResourceURI(sidefile.toString());
+            throw sfe;
+        }
+    }
+}