+++ /dev/null
-package org.apache.lucene.facet.search;
-
-import java.io.IOException;
-
-/**
- * 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.
- */
-
-/**
- * An interface for iterating over a "category list", i.e., the list of
- * categories per document.
- * <p>
- * <b>NOTE:</b>
- * <ul>
- * <li>This class operates as a key to a Map. Appropriate implementation of
- * <code>hashCode()</code> and <code>equals()</code> must be provided.
- * <li>{@link #init()} must be called before you consume any categories, or call
- * {@link #skipTo(int)}.
- * <li>{@link #skipTo(int)} must be called before any calls to
- * {@link #nextCategory()}.
- * <li>{@link #nextCategory()} returns values < {@link Integer#MAX_VALUE}, so
- * you can use it as a stop condition.
- * </ul>
- *
- * @lucene.experimental
- */
-public interface CategoryListIterator {
-
- /**
- * Initializes the iterator. This method must be called before any calls to
- * {@link #skipTo(int)}, and its return value indicates whether there are
- * any relevant documents for this iterator. If it returns false, any call
- * to {@link #skipTo(int)} will return false as well.<br>
- * <b>NOTE:</b> calling this method twice may result in skipping over
- * documents for some implementations. Also, calling it again after all
- * documents were consumed may yield unexpected behavior.
- */
- public boolean init() throws IOException;
-
- /**
- * Skips forward to document docId. Returns true iff this document exists
- * and has any categories. This method must be called before calling
- * {@link #nextCategory()} for a particular document.<br>
- * <b>NOTE:</b> Users should call this method with increasing docIds, and
- * implementations can assume that this is the case.
- */
- public boolean skipTo(int docId) throws IOException;
-
- /**
- * Returns the next category for the current document that is set through
- * {@link #skipTo(int)}, or a number higher than {@link Integer#MAX_VALUE}.
- * No assumptions can be made on the order of the categories.
- */
- public long nextCategory() throws IOException;
-
-}