From 75813a5fd9489c1715e7544d4e1416b7a16e81eb Mon Sep 17 00:00:00 2001 From: antelder Date: Tue, 17 Mar 2009 16:20:41 +0000 Subject: [maven-release-plugin] copy for tag 2.0-M2 git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@755301 13f79535-47bb-0310-9956-ffa450edef68 --- .../DefaultCompositeBuilderExtensionPoint.java | 145 +++++++++++++++++++++ 1 file changed, 145 insertions(+) create mode 100644 sandbox/ant/sca/tags/2.0-M2/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/DefaultCompositeBuilderExtensionPoint.java (limited to 'sandbox/ant/sca/tags/2.0-M2/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/DefaultCompositeBuilderExtensionPoint.java') diff --git a/sandbox/ant/sca/tags/2.0-M2/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/DefaultCompositeBuilderExtensionPoint.java b/sandbox/ant/sca/tags/2.0-M2/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/DefaultCompositeBuilderExtensionPoint.java new file mode 100644 index 0000000000..d9b9763475 --- /dev/null +++ b/sandbox/ant/sca/tags/2.0-M2/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/DefaultCompositeBuilderExtensionPoint.java @@ -0,0 +1,145 @@ +/* + * 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.assembly.builder; + +import java.lang.reflect.Constructor; +import java.util.HashMap; +import java.util.Map; +import java.util.Set; + +import org.apache.tuscany.sca.assembly.Composite; +import org.apache.tuscany.sca.core.ExtensionPointRegistry; +import org.apache.tuscany.sca.core.FactoryExtensionPoint; +import org.apache.tuscany.sca.core.UtilityExtensionPoint; +import org.apache.tuscany.sca.definitions.Definitions; +import org.apache.tuscany.sca.extensibility.ServiceDeclaration; +import org.apache.tuscany.sca.extensibility.ServiceDiscovery; +import org.apache.tuscany.sca.interfacedef.InterfaceContractMapper; +import org.apache.tuscany.sca.monitor.Monitor; + +/** + * Default implementation of a provider factory extension point. + * + * @version $Rev$ $Date$ + */ +public class DefaultCompositeBuilderExtensionPoint implements CompositeBuilderExtensionPoint { + + private ExtensionPointRegistry registry; + private final Map builders = new HashMap(); + private boolean loaded; + + public DefaultCompositeBuilderExtensionPoint(ExtensionPointRegistry registry) { + this.registry = registry; + } + + public void addCompositeBuilder(CompositeBuilder builder) { + builders.put(builder.getID(), builder); + } + + public void removeCompositeBuilder(CompositeBuilder builder) { + builders.remove(builder.getID()); + } + + public CompositeBuilder getCompositeBuilder(String id) { + loadBuilders(); + return builders.get(id); + } + + /** + * Load builders declared under META-INF/services. + */ + private synchronized void loadBuilders() { + if (loaded) + return; + + FactoryExtensionPoint factories = registry.getExtensionPoint(FactoryExtensionPoint.class); + + UtilityExtensionPoint utils = registry.getExtensionPoint(UtilityExtensionPoint.class); + InterfaceContractMapper mapper = utils.getUtility(InterfaceContractMapper.class); + + // Get the provider factory service declarations + Set builderDeclarations; + ServiceDiscovery serviceDiscovery = ServiceDiscovery.getInstance(); + try { + builderDeclarations = serviceDiscovery.getServiceDeclarations(CompositeBuilder.class.getName()); + } catch (Exception e) { + throw new IllegalStateException(e); + } + + for (ServiceDeclaration builderDeclaration : builderDeclarations) { + Map attributes = builderDeclaration.getAttributes(); + String id = attributes.get("id"); + + CompositeBuilder builder = new LazyCompositeBuilder(id, builderDeclaration, this, factories, mapper); + builders.put(id, builder); + } + } + + /** + * A wrapper around a composite builder allowing lazy + * loading and initialization of implementation providers. + */ + private static class LazyCompositeBuilder implements CompositeBuilder { + + private FactoryExtensionPoint factories; + private InterfaceContractMapper mapper; + private String id; + private ServiceDeclaration builderDeclaration; + private CompositeBuilder builder; + private CompositeBuilderExtensionPoint builders; + + private LazyCompositeBuilder(String id, ServiceDeclaration factoryDeclaration, + CompositeBuilderExtensionPoint builders, FactoryExtensionPoint factories, InterfaceContractMapper mapper) { + this.id = id; + this.builderDeclaration = factoryDeclaration; + this.builders = builders; + this.factories = factories; + this.mapper = mapper; + } + + public String getID() { + return id; + } + + public void build(Composite composite, Definitions definitions, Monitor monitor) throws CompositeBuilderException { + getBuilder().build(composite, definitions, monitor); + } + + private CompositeBuilder getBuilder() { + if (builder == null) { + try { + Class builderClass = (Class)builderDeclaration.loadClass(); + try { + Constructor constructor = builderClass.getConstructor(FactoryExtensionPoint.class, InterfaceContractMapper.class); + builder = constructor.newInstance(factories, mapper); + } catch (NoSuchMethodException e) { + Constructor constructor = builderClass.getConstructor(CompositeBuilderExtensionPoint.class, FactoryExtensionPoint.class, InterfaceContractMapper.class); + builder = constructor.newInstance(builders, factories, mapper); + } + } catch (Exception e) { + throw new IllegalStateException(e); + } + } + return builder; + } + + } + +} -- cgit v1.2.3