| /* |
| * 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.uima.impl; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.ListIterator; |
| import java.util.Map; |
| |
| import org.apache.uima.CompositeResourceFactory; |
| import org.apache.uima.ResourceFactory; |
| import org.apache.uima.resource.Resource; |
| import org.apache.uima.resource.ResourceInitializationException; |
| import org.apache.uima.resource.ResourceSpecifier; |
| |
| /** |
| * A registry containing (ResourceSpecifier Class, {@link ResourceFactory}) pairs. Also implements |
| * the <code>ResourceFactory</code> interface, and produces resources by delegating to the most |
| * recently registered <code>ResourceFactory</code> instance that can handle the class of the |
| * given specifier object. |
| * |
| * |
| */ |
| public class CompositeResourceFactory_impl implements CompositeResourceFactory { |
| |
| /** |
| * List of Registration objects. |
| */ |
| private List mRegisteredFactories = Collections.synchronizedList(new ArrayList()); |
| |
| /** |
| * @see org.apache.uima.ResourceFactory#produceResource(java.lang.Class, |
| * org.apache.uima.resource.ResourceSpecifier, java.util.Map) |
| */ |
| public Resource produceResource(Class aResourceClass, ResourceSpecifier aSpecifier, |
| Map aAdditionalParams) throws ResourceInitializationException { |
| // check for factories registered for this resource specifier type |
| // (most recently registered first) |
| ListIterator it = mRegisteredFactories.listIterator(mRegisteredFactories.size()); |
| Resource result = null; |
| while (it.hasPrevious()) { |
| Registration reg = (Registration) it.previous(); |
| if (reg.resourceSpecifierInterface.isAssignableFrom(aSpecifier.getClass())) { |
| result = reg.factory.produceResource(aResourceClass, aSpecifier, aAdditionalParams); |
| if (result != null) { |
| return result; |
| } |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * @see org.apache.uima.CompositeResourceFactory#registerFactory(Class,ResourceFactory) |
| */ |
| public void registerFactory(Class aResourceSpecifierInterface, ResourceFactory aFactory) { |
| mRegisteredFactories.add(new Registration(aResourceSpecifierInterface, aFactory)); |
| } |
| |
| /** |
| * Inner class that holds information on a registered factory. |
| */ |
| static class Registration { |
| Class resourceSpecifierInterface; |
| |
| ResourceFactory factory; |
| |
| /** |
| * @param aResourceSpecifierInterface |
| * @param aFactory |
| */ |
| public Registration(Class aResourceSpecifierInterface, ResourceFactory aFactory) { |
| resourceSpecifierInterface = aResourceSpecifierInterface; |
| factory = aFactory; |
| } |
| } |
| |
| } |