/*
* 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.entityhub.indexing.core;
import java.util.Iterator;
import org.apache.stanbol.entityhub.servicesapi.model.Representation;
/**
* Interface used to iterate over all entities.
* By calling {@link #next()} one can iterate over the IDs of the Entities.
* The data ({@link Representation}) of the current entity are available by
* calling {@link #getRepresentation()}.<p>
* This interface is intended for data source that prefer to read entity
* information as a stream (e.g. from an tab separated text file) and therefore
* can not provide an implementation of the {@link EntityDataProvider} interface.
* @see EntityDataProvider
* @author Rupert Westenthaler
*
*/
public interface EntityDataIterator extends Iterator<String>{
/**
* Getter for the Representation of the current active Element. This is the
* Representation of the Entity with the ID returned for the previous
* call to {@link #next()}. This method does not change the current element
* of the iteration.
* @return the Representation for the entity with the ID returned by
* {@link #next()}
*/
Representation getRepresentation();
/**
* Close the iteration.
*/
void close();
}