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+/**
+ *
+ * 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.core.system.config;
+
+import org.apache.tuscany.common.TuscanyRuntimeException;
+import org.apache.tuscany.core.builder.ContextCreationException;
+import org.apache.tuscany.core.builder.ContextFactory;
+import org.apache.tuscany.core.builder.ContextResolver;
+import org.apache.tuscany.core.config.ConfigurationException;
+import org.apache.tuscany.core.context.CompositeContext;
+import org.apache.tuscany.core.context.Context;
+import org.apache.tuscany.core.injection.EventInvoker;
+import org.apache.tuscany.core.injection.Injector;
+import org.apache.tuscany.core.injection.PojoObjectFactory;
+import org.apache.tuscany.core.wire.SourceWireFactory;
+import org.apache.tuscany.core.wire.TargetWireFactory;
+import org.apache.tuscany.core.system.context.SystemAtomicContext;
+import org.apache.tuscany.model.assembly.Module;
+import org.apache.tuscany.model.assembly.Scope;
+
+import java.lang.reflect.Constructor;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * A <code>ContextFactory</code> that handles system component implementation types, which may be either simple, leaf
+ * types or an composites.
+ * <p>
+ * For composite types, this factory delegates to an {@link org.apache.tuscany.core.builder.ObjectFactory} to create an
+ * instance of the composite implementation and perform injection of configuration and references. Once an composite
+ * instance is created, the factory will register the composite's children. This process may be done recursively in a
+ * lazy fashion, descending down an composite hierarchy as a child composite is instantiated.
+ *
+ * @version $Rev$ $Date$
+ */
+public class SystemContextFactory implements ContextFactory<Context>, ContextResolver {
+
+ // the component name as configured in the hosting module
+ private String name;
+
+ // if this factory produces composites, the module will be the logical model associated with its children
+ private Module module;
+
+ private CompositeContext parentContext;
+
+ // the implementation type constructor
+ private Constructor ctr;
+
+ // injectors for properties, references and other metadata values such as @Context
+ private List<Injector> setters;
+
+ // an invoker for a method decorated with @Init
+ private EventInvoker init;
+
+ // whether the component should be eagerly initialized when its scope starts
+ private boolean eagerInit;
+
+ // an invoker for a method decorated with @Destroy
+ private EventInvoker destroy;
+
+ // the scope of the implementation instance
+ private Scope scope;
+
+ // if the component implementation scope is stateless
+ private boolean stateless;
+
+ // if the component implementation is an composite context
+ private boolean isComposite;
+
+ /**
+ * Creates the runtime configuration
+ *
+ * @param name the SCDL name of the component the context refers to
+ * @param ctr the implementation type constructor
+ * @param scope the scope of the component implementation type
+ */
+ public SystemContextFactory(String name, Constructor ctr, Scope scope) {
+ this(name, null, ctr, scope);
+ }
+
+ /**
+ * Creates the runtime configuration
+ *
+ * @param name the SCDL name of the component the context refers to
+ * @param module if this factory produces aggregagtes, the logical model associated with its children; otherwise
+ * null
+ * @param ctr the implementation type constructor
+ * @param scope the scope of the component implementation type
+ */
+ public SystemContextFactory(String name, Module module, Constructor ctr, Scope scope) {
+ assert (name != null) : "Name was null";
+ assert (ctr != null) : "Constructor was null";
+ this.name = name;
+ this.module = module;
+ this.ctr = ctr;
+ this.isComposite = CompositeContext.class.isAssignableFrom(ctr.getDeclaringClass());
+ this.scope = scope;
+ if (isComposite) {
+ scope = Scope.AGGREGATE;
+ } else {
+ stateless = (scope == Scope.INSTANCE);
+ }
+ }
+
+ public String getName() {
+ return name;
+ }
+
+ public void addProperty(String propertyName, Object value) {
+
+ }
+
+ public Scope getScope() {
+ return scope;
+ }
+
+ public Context createContext() throws ContextCreationException {
+ if (isComposite) {
+ try {
+ // composite context types are themselves an instance context
+ PojoObjectFactory<CompositeContext> objectFactory = new PojoObjectFactory<CompositeContext>(ctr, null, setters);
+ CompositeContext ctx = objectFactory.getInstance();
+ ctx.setName(name);
+ // the composite has been created, now register its children
+ if (module != null) {
+ try {
+ ctx.registerModelObject(module);
+ } catch (ConfigurationException e) {
+ ContextCreationException cce = new ContextCreationException("Error creating context", e);
+ cce.setIdentifier(getName());
+ throw cce;
+ }
+
+ }
+ return ctx;
+ } catch (TuscanyRuntimeException e) {
+ e.addContextName(name);
+ throw e;
+ }
+ } else {
+ PojoObjectFactory objectFactory = new PojoObjectFactory(ctr, null, setters);
+ return new SystemAtomicContext(name, objectFactory, eagerInit, init, destroy, stateless);
+ }
+ }
+
+ public void addTargetWireFactory(String serviceName, TargetWireFactory factory) {
+ throw new UnsupportedOperationException();
+ }
+
+ public TargetWireFactory getTargetWireFactory(String serviceName) {
+ return null;
+ }
+
+ public Map<String, TargetWireFactory> getTargetWireFactories() {
+ return null;
+ }
+
+ public void addSourceWireFactory(String referenceName, SourceWireFactory factory) {
+ throw new UnsupportedOperationException();
+ }
+
+ public void addSourceWireFactories(String referenceName, Class referenceInterface, List<SourceWireFactory> factory, boolean multiplicity) {
+
+ }
+
+ public List<SourceWireFactory> getSourceWireFactories() {
+ return null;
+ }
+
+ public void setSetters(List<Injector> setters) {
+ this.setters = setters;
+ }
+
+ public void setEagerInit(boolean val) {
+ eagerInit = val;
+ }
+
+ public void setInitInvoker(EventInvoker invoker) {
+ init = invoker;
+ }
+
+ public void setDestroyInvoker(EventInvoker invoker) {
+ destroy = invoker;
+ }
+
+ public void prepare(CompositeContext parent) {
+ parentContext = parent;
+ }
+
+ public CompositeContext getCurrentContext() {
+ return parentContext;
+ }
+
+}