1 files changed, 399 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/kernel/2.0-alpha-incubating/core/src/main/java/org/apache/tuscany/core/implementation/PojoAtomicComponent.java b/sca-java-1.x/tags/kernel/2.0-alpha-incubating/core/src/main/java/org/apache/tuscany/core/implementation/PojoAtomicComponent.java
new file mode 100644
index 0000000000..e34a8b96c9
--- /dev/null
+++ b/sca-java-1.x/tags/kernel/2.0-alpha-incubating/core/src/main/java/org/apache/tuscany/core/implementation/PojoAtomicComponent.java
@@ -0,0 +1,399 @@
+/*
+ * 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.implementation;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Member;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+import org.osoa.sca.ComponentContext;
+import org.osoa.sca.ServiceReference;
+import org.osoa.sca.CallableReference;
+
+import org.apache.tuscany.spi.CoreRuntimeException;
+import org.apache.tuscany.spi.ObjectCreationException;
+import org.apache.tuscany.spi.ObjectFactory;
+import org.apache.tuscany.spi.component.TargetDestructionException;
+import org.apache.tuscany.spi.component.TargetInitializationException;
+import org.apache.tuscany.spi.component.TargetResolutionException;
+import org.apache.tuscany.spi.extension.AtomicComponentExtension;
+import org.apache.tuscany.spi.model.Scope;
+import org.apache.tuscany.spi.wire.Wire;
+
+import org.apache.tuscany.core.component.ComponentContextImpl;
+import org.apache.tuscany.core.component.ComponentContextProvider;
+import org.apache.tuscany.core.component.ServiceReferenceImpl;
+import org.apache.tuscany.core.injection.ArrayMultiplicityObjectFactory;
+import org.apache.tuscany.core.injection.CallbackWireObjectFactory;
+import org.apache.tuscany.core.injection.ConversationIDObjectFactory;
+import org.apache.tuscany.core.injection.EventInvoker;
+import org.apache.tuscany.core.injection.FieldInjector;
+import org.apache.tuscany.core.injection.Injector;
+import org.apache.tuscany.core.injection.InvalidAccessorException;
+import org.apache.tuscany.core.injection.ListMultiplicityObjectFactory;
+import org.apache.tuscany.core.injection.MethodInjector;
+import org.apache.tuscany.core.injection.NoAccessorException;
+import org.apache.tuscany.core.injection.NoMultiplicityTypeException;
+import org.apache.tuscany.core.injection.ObjectCallbackException;
+import org.apache.tuscany.core.injection.PojoObjectFactory;
+
+/**
+ * Base implementation of an {@link org.apache.tuscany.spi.component.AtomicComponent} whose type is a Java class
+ *
+ * @version $$Rev$$ $$Date$$
+ */
+public abstract class PojoAtomicComponent extends AtomicComponentExtension implements ComponentContextProvider {
+    protected EventInvoker<Object> initInvoker;
+    protected EventInvoker<Object> destroyInvoker;
+    protected PojoObjectFactory<?> instanceFactory;
+    protected List<String> constructorParamNames;
+    protected Map<String, Member> referenceSites;
+    protected Map<String, Member> resourceSites;
+    protected Map<String, Member> propertySites;
+    protected Map<String, Member> callbackSites;
+    protected List<Injector<Object>> injectors;
+    protected Class implementationClass;
+    protected Map<String, List<Wire>> wires = new HashMap<String, List<Wire>>();
+    protected Map<String, List<Wire>> callBackwires = new HashMap<String, List<Wire>>();
+
+    private final ComponentContext componentContext;
+    private final Map<String, ObjectFactory<?>> propertyFactories = new ConcurrentHashMap<String, ObjectFactory<?>>();
+    private List<Class<?>> constructorParamTypes = new ArrayList<Class<?>>();
+
+    public PojoAtomicComponent(PojoConfiguration configuration) {
+        super(configuration.getName(),
+            configuration.getProxyService(),
+            configuration.getWorkContext(),
+            configuration.getInitLevel(),
+            configuration.getMaxIdleTime(),
+            configuration.getMaxAge());
+        assert configuration.getInstanceFactory() != null : "Object factory was null";
+        initInvoker = configuration.getInitInvoker();
+        destroyInvoker = configuration.getDestroyInvoker();
+        instanceFactory = configuration.getInstanceFactory();
+        constructorParamNames = configuration.getConstructorParamNames();
+        constructorParamTypes = configuration.getConstructorParamTypes();
+        injectors = new ArrayList<Injector<Object>>();
+        referenceSites = configuration.getReferenceSite() != null ? configuration.getReferenceSite()
+            : new HashMap<String, Member>();
+        propertySites = configuration.getPropertySites() != null ? configuration.getPropertySites()
+            : new HashMap<String, Member>();
+        resourceSites = configuration.getResourceSites() != null ? configuration.getResourceSites()
+            : new HashMap<String, Member>();
+        callbackSites = configuration.getCallbackSites() != null ? configuration.getCallbackSites()
+            : new HashMap<String, Member>();
+        implementationClass = configuration.getImplementationClass();
+
+        componentContext = new ComponentContextImpl(this);
+    }
+
+    public boolean isDestroyable() {
+        return destroyInvoker != null;
+    }
+
+    public void init(Object instance) throws TargetInitializationException {
+        if (initInvoker != null) {
+            try {
+                initInvoker.invokeEvent(instance);
+            } catch (ObjectCallbackException e) {
+                String uri = getUri().toString();
+                throw new TargetInitializationException("Error initializing component instance", uri, e);
+            }
+        }
+    }
+
+    public void destroy(Object instance) throws TargetDestructionException {
+        if (destroyInvoker != null) {
+            try {
+                destroyInvoker.invokeEvent(instance);
+            } catch (ObjectCallbackException e) {
+                throw new TargetDestructionException("Error destroying component instance", getUri().toString(), e);
+            }
+        }
+    }
+
+    public boolean isOptimizable() {
+        // stateless implementations that require a destroy callback cannot be optimized since the callback is
+        // performed by the JavaTargetInvoker
+        return !(getScope() == Scope.STATELESS && isDestroyable());
+    }
+
+    public Object getTargetInstance() throws TargetResolutionException {
+        return scopeContainer.getInstance(this);
+    }
+
+    public Object getAssociatedTargetInstance() throws TargetResolutionException {
+        return scopeContainer.getAssociatedInstance(this);
+    }
+
+    public Object createInstance() throws ObjectCreationException {
+        Object instance = instanceFactory.getInstance();
+        // inject the instance with properties and references
+        for (Injector<Object> injector : injectors) {
+            injector.inject(instance);
+        }
+        return instance;
+    }
+
+    public List<Wire> getWires(String name) {
+        return wires.get(name);
+    }
+
+    public void attachWire(Wire wire) {
+        assert wire.getSourceUri().getFragment() != null;
+        String referenceName = wire.getSourceUri().getFragment();
+        List<Wire> wireList = wires.get(referenceName);
+        if (wireList == null) {
+            wireList = new ArrayList<Wire>();
+            wires.put(referenceName, wireList);
+        }
+        wireList.add(wire);
+        Member member = referenceSites.get(referenceName);
+        if (member != null) {
+            injectors.add(createInjector(member, wire));
+        }
+        // cycle through constructor param names as well
+        for (int i = 0; i < constructorParamNames.size(); i++) {
+            if (referenceName.equals(constructorParamNames.get(i))) {
+                ObjectFactory[] initializerFactories = instanceFactory.getInitializerFactories();
+                initializerFactories[i] = createWireFactory(constructorParamTypes.get(i), wire);
+                break;
+            }
+        }
+        //TODO error if ref not set on constructor or ref site
+
+    }
+
+    public void attachWires(List<Wire> attachWires) {
+        assert attachWires.size() > 0;
+        assert attachWires.get(0).getSourceUri().getFragment() != null;
+        String referenceName = attachWires.get(0).getSourceUri().getFragment();
+        List<Wire> wireList = wires.get(referenceName);
+        if (wireList == null) {
+            wireList = new ArrayList<Wire>();
+            wires.put(referenceName, wireList);
+        }
+        wireList.addAll(attachWires);
+        Member member = referenceSites.get(referenceName);
+        if (member == null) {
+            if (constructorParamNames.contains(referenceName)) {
+                // injected on the constructor
+                throw new UnsupportedOperationException();
+            } else {
+                throw new NoAccessorException(referenceName);
+            }
+        }
+
+        Class<?> type = attachWires.get(0).getSourceContract().getInterfaceClass();
+        if (type == null) {
+            throw new NoMultiplicityTypeException("Java interface must be specified for multiplicity", referenceName);
+        }
+        injectors.add(createMultiplicityInjector(member, type, wireList));
+
+    }
+
+    public void attachCallbackWire(Wire wire) {
+        assert wire.getSourceUri().getFragment() != null;
+        String callbackName = wire.getSourceContract().getCallbackName();
+        assert callbackSites.get(callbackName) != null;
+        List<Wire> wireList = callBackwires.get(callbackName);
+        if (wireList == null) {
+            wireList = new ArrayList<Wire>();
+            callBackwires.put(callbackName, wireList);
+        }
+        wireList.add(wire);
+    }
+
+    public void start() throws CoreRuntimeException {
+        if (!callbackSites.isEmpty()) {
+            for (Map.Entry<String, Member> entry : callbackSites.entrySet()) {
+                List<Wire> wires = callBackwires.get(entry.getKey());
+                if (wires == null) {
+                    // this can happen when there are no client wires to a component that has a callback  
+                    continue;
+                }
+                Member member = entry.getValue();
+                if (member instanceof Field) {
+                    Field field = (Field) member;
+                    ObjectFactory<?> factory = new CallbackWireObjectFactory(field.getType(), proxyService, wires);
+                    injectors.add(new FieldInjector<Object>(field, factory));
+                } else if (member instanceof Method) {
+                    Method method = (Method) member;
+                    Class<?> type = method.getParameterTypes()[0];
+                    ObjectFactory<?> factory = new CallbackWireObjectFactory(type, proxyService, wires);
+                    injectors.add(new MethodInjector<Object>(method, factory));
+                } else {
+                    throw new InvalidAccessorException("Member must be a field or method", member.getName());
+                }
+            }
+        }
+        super.start();
+
+    }
+
+    public void addPropertyFactory(String name, ObjectFactory<?> factory) {
+        Member member = propertySites.get(name);
+        if (member instanceof Field) {
+            injectors.add(new FieldInjector<Object>((Field) member, factory));
+        } else if (member instanceof Method) {
+            injectors.add(new MethodInjector<Object>((Method) member, factory));
+        }
+        // cycle through constructor param names as well
+        for (int i = 0; i < constructorParamNames.size(); i++) {
+            if (name.equals(constructorParamNames.get(i))) {
+                ObjectFactory[] initializerFactories = instanceFactory.getInitializerFactories();
+                initializerFactories[i] = factory;
+                break;
+            }
+        }
+        //FIXME throw an error if no injection site found
+
+        propertyFactories.put(name, factory);
+    }
+
+    public void addResourceFactory(String name, ObjectFactory<?> factory) {
+        Member member = resourceSites.get(name);
+        if (member instanceof Field) {
+            injectors.add(new FieldInjector<Object>((Field) member, factory));
+        } else if (member instanceof Method) {
+            injectors.add(new MethodInjector<Object>((Method) member, factory));
+        }
+        // cycle through constructor param names as well
+        for (int i = 0; i < constructorParamNames.size(); i++) {
+            if (name.equals(constructorParamNames.get(i))) {
+                ObjectFactory[] initializerFactories = instanceFactory.getInitializerFactories();
+                initializerFactories[i] = factory;
+                break;
+            }
+        }
+        //FIXME throw an error if no injection site found
+    }
+
+    public void addConversationIDFactory(Member member) {
+        ObjectFactory<String> convIDObjectFactory = new ConversationIDObjectFactory(workContext);
+        if (member instanceof Field) {
+            injectors.add(new FieldInjector<Object>((Field) member, convIDObjectFactory));
+        } else if (member instanceof Method) {
+            injectors.add(new MethodInjector<Object>((Method) member, convIDObjectFactory));
+        } else {
+            throw new InvalidAccessorException("Member must be a field or method", member.getName());
+        }
+    }
+
+    public boolean implementsCallback(Class callbackClass) {
+        Class<?>[] implementedInterfaces = implementationClass.getInterfaces();
+        for (Class<?> implementedInterface : implementedInterfaces) {
+            if (implementedInterface.isAssignableFrom(callbackClass)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    protected Injector<Object> createInjector(Member member, Wire wire) {
+        if (member instanceof Field) {
+            Class<?> type = ((Field) member).getType();
+            ObjectFactory<?> factory = createWireFactory(type, wire);
+            return new FieldInjector<Object>((Field) member, factory);
+        } else if (member instanceof Method) {
+            Class<?> type = ((Method) member).getParameterTypes()[0];
+            ObjectFactory<?> factory = createWireFactory(type, wire);
+            return new MethodInjector<Object>((Method) member, factory);
+        } else {
+            throw new InvalidAccessorException("Member must be a field or method", member.getName());
+        }
+    }
+
+    protected Injector<Object> createMultiplicityInjector(Member member,
+                                                          Class<?> interfaceType,
+                                                          List<Wire> wireFactories) {
+        List<ObjectFactory<?>> factories = new ArrayList<ObjectFactory<?>>();
+        for (Wire wire : wireFactories) {
+            factories.add(createWireFactory(interfaceType, wire));
+        }
+        if (member instanceof Field) {
+            Field field = (Field) member;
+            if (field.getType().isArray()) {
+                return new FieldInjector<Object>(field, new ArrayMultiplicityObjectFactory(interfaceType, factories));
+            } else {
+                return new FieldInjector<Object>(field, new ListMultiplicityObjectFactory(factories));
+            }
+        } else if (member instanceof Method) {
+            Method method = (Method) member;
+            if (method.getParameterTypes()[0].isArray()) {
+                return new MethodInjector<Object>(method, new ArrayMultiplicityObjectFactory(interfaceType, factories));
+            } else {
+                return new MethodInjector<Object>(method, new ListMultiplicityObjectFactory(factories));
+            }
+        } else {
+            throw new InvalidAccessorException("Member must be a field or method", member.getName());
+        }
+    }
+
+    public ComponentContext getComponentContext() {
+        return componentContext;
+    }
+
+    public <B> B getProperty(Class<B> type, String propertyName) {
+        ObjectFactory<?> factory = propertyFactories.get(propertyName);
+        if (factory != null) {
+            return type.cast(factory.getInstance());
+        } else {
+            return null;
+        }
+
+    }
+
+    public <B> B getService(Class<B> type, String name) {
+        List<Wire> referenceWires = wires.get(name);
+        if (referenceWires == null || referenceWires.size() < 1) {
+            return null;
+        } else {
+            // TODO support multiplicity
+            Wire wire = referenceWires.get(0);
+            ObjectFactory<B> factory = createWireFactory(type, wire);
+            return factory.getInstance();
+        }
+    }
+
+    public <B> ServiceReference<B> getServiceReference(Class<B> type, String name) {
+        List<Wire> referenceWires = wires.get(name);
+        if (referenceWires == null || referenceWires.size() < 1) {
+            return null;
+        } else {
+            // TODO support multiplicity
+            Wire wire = referenceWires.get(0);
+            ObjectFactory<B> factory = createWireFactory(type, wire);
+            return new ServiceReferenceImpl<B>(type, factory);
+        }
+    }
+
+    public <B, R extends CallableReference<B>> R cast(B target) {
+        return (R) proxyService.cast(target);
+    }
+
+    protected abstract <B> ObjectFactory<B> createWireFactory(Class<B> interfaze, Wire wire);
+
+}