| /* |
| * 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.stanbol.enhancer.servicesapi; |
| |
| /** |
| * Interface to internal or external semantic enhancement engines. There will |
| * usually be several of those, that the EnhancementJobManager uses to enhance |
| * content items. |
| */ |
| public interface EnhancementEngine { |
| |
| /** |
| * The property used to provide the name of an enhancement engine. |
| */ |
| String PROPERTY_NAME = "stanbol.enhancer.engine.name"; |
| /** |
| * Return value for {@link #canEnhance}, meaning this engine cannot enhance |
| * supplied {@link ContentItem} |
| */ |
| int CANNOT_ENHANCE = 0; |
| |
| /** |
| * Return value for {@link #canEnhance}, meaning this engine can enhance |
| * supplied {@link ContentItem}, and suggests enhancing it synchronously |
| * instead of queuing a request for enhancement. |
| */ |
| int ENHANCE_SYNCHRONOUS = 1; |
| |
| /** |
| * Return value for {@link #canEnhance}, meaning this engine can enhance |
| * supplied {@link ContentItem}, and suggests queuing a request for |
| * enhancement instead of enhancing it synchronously. |
| */ |
| int ENHANCE_ASYNC = 2; |
| |
| /** |
| * Indicate if this engine can enhance supplied ContentItem, and if it |
| * suggests enhancing it synchronously or asynchronously. The |
| * {@link EnhancementJobManager} can force sync/async mode if desired, it is |
| * just a suggestion from the engine. |
| * |
| * @throws EngineException if the introspecting process of the content item |
| * fails |
| */ |
| int canEnhance(ContentItem ci) throws EngineException; |
| |
| /** |
| * Compute enhancements for supplied ContentItem. The results of the process |
| * are expected to be stored in the metadata of the content item. |
| * |
| * The client (usually an {@link EnhancementJobManager}) should take care of |
| * persistent storage of the enhanced {@link ContentItem}. |
| * |
| * @throws EngineException if the underlying process failed to work as |
| * expected |
| */ |
| void computeEnhancements(ContentItem ci) throws EngineException; |
| /** |
| * Getter for the name of this EnhancementEngine instance as configured |
| * by {@link #PROPERTY_NAME} |
| * @return the name |
| */ |
| String getName(); |
| |
| } |