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The Apache Commons Codec package contains simple encoder and decoders for various formats such as Base64 and Hexadecimal. In addition to these widely used encoders and decoders, the codec package also maintains a collection of phonetic encoding utilities.

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/* ====================================================================
   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.poi.hwpf.usermodel;

import java.util.List;
import java.util.Map;

/**
 * User-friendly interface to access document bookmarks
 * 
 * @author Sergey Vladimirov (vlsergey {at} gmail {dot} com)
 */
public interface Bookmarks
{
    /**
     * @param index
     *            bookmark document index
     * @return {@link Bookmark} with specified index
     * @throws IndexOutOfBoundsException
     *             if bookmark with specified index not present in document
     */
    Bookmark getBookmark( int index ) throws IndexOutOfBoundsException;

    /**
     * @return count of {@link Bookmark}s in document
     */
    int getBookmarksCount();

    /**
     * @return {@link Map} of bookmarks started in specified range, where key is
     *         start position and value is sorted {@link List} of
     *         {@link Bookmark}
     */
    Map> getBookmarksStartedBetween(
            int startInclusive, int endExclusive );

    /**
     * Remove bookmark from document (but not the bookmark text)
     * 
     * @param index
     *            bookmark document index to be removed
     */
    void remove( int index );
}