| /* |
| * 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; |
| |
| import java.util.Map; |
| |
| import org.apache.uima.resource.Resource; |
| import org.apache.uima.resource.ResourceInitializationException; |
| import org.apache.uima.resource.ResourceSpecifier; |
| |
| /** |
| * A <code>ResourceFactory</code> is used to acquire instances of {@link Resource}s. |
| * <p> |
| * The method {@link #produceResource(Class,ResourceSpecifier,Map)} is used to produce an instance |
| * of a <code>Resource<code>. The input to this method |
| * is a {@link ResourceSpecifier}, which contains all of the information that |
| * this factory can use to acquire a reference to the resource. |
| * <p> |
| * Most applications will not need to interact with this interface. |
| * Applications will generally create resources using the static methods on |
| * the {@link org.apache.uima.UIMAFramework} class. |
| * <p> |
| * Note that multiple threads may attempt to manufacture resources |
| * simulatenously, so implementations of this interface MUST be threadsafe. |
| * <p> |
| * Developers needing to provide their own <code>ResourceFactory</code> may |
| * wish to consider using the provided |
| * {@link org.apache.uima.util.SimpleResourceFactory} implementation. |
| * |
| * |
| */ |
| public interface ResourceFactory { |
| /** |
| * Produces an appropriate <code>Resource</code> instance from a <code>ResourceSpecifier</code>. |
| * This version of <code>produceResource</code> takes a Map containing additional parameters to |
| * be passed to the {@link Resource#initialize(ResourceSpecifier,Map)} method. |
| * |
| * @param aResourceClass |
| * the class of resource to be produced (NOTE: this is intended to be a standard UIMA |
| * interface name such as "TextAnalysisEngine" or "ASB") |
| * @param aSpecifier |
| * an object that specifies how to acquire an instance of a <code>Resource</code>. |
| * @param aAdditionalParams |
| * a Map containing additional parameters to pass to the |
| * {@link Resource#initialize(ResourceSpecifier,Map)} method. May be <code>null</code> |
| * if there are no parameters. |
| * |
| * @return a <code>Resource</code> instance. Returns <code>null</code> if this factory does |
| * not know how to create a Resource from the <code>ResourceSpecifier</code> provided. |
| * |
| * @throws ResourceInitializationException |
| * if a failure occurred during production of the resource |
| */ |
| public Resource produceResource(Class aResourceClass, ResourceSpecifier aSpecifier, |
| Map aAdditionalParams) throws ResourceInitializationException; |
| |
| } |