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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.sl.usermodel;

import java.util.List;


public interface ShapeContainer<
    S extends Shape,
    P extends TextParagraph
> extends Iterable {
    /**
     * Returns an list containing all of the elements in this container in proper
     * sequence (from first to last element).
     *
     * @return an list containing all of the elements in this container in proper
     *         sequence
     */
	List getShapes();

	void addShape(S shape);

    /**
     * Removes the specified shape from this sheet, if it is present
     * (optional operation).  If this sheet does not contain the element,
     * it is unchanged.
     *
     * @param shape the shape to be removed from this sheet, if present
     * @return true if this sheet contained the specified element
     * @throws IllegalArgumentException if the type of the specified shape
     *         is incompatible with this sheet (optional)
     */
	boolean removeShape(S shape);

    /**
     * create a new shape with a predefined geometry and add it to this shape container
     */
    AutoShape createAutoShape();

    /**
     * create a new shape with a custom geometry
     */
    FreeformShape createFreeform();

    /**
     * create a text box
     */
	TextBox createTextBox();
	
    /**
     * create a connector
     */
	ConnectorShape createConnector();
	
    /**
     * create a group of shapes belonging to this container
     */
	GroupShape createGroup();
	
    /**
     * create a picture belonging to this container
     */
	PictureShape createPicture(PictureData pictureData);
	
    /**
     * Create a new Table of the given number of rows and columns
     *
     * @param numRows the number of rows
     * @param numCols the number of columns
     */
	TableShape createTable(int numRows, int numCols);
	
	/**
	 * Create a new OLE object shape with the given pictureData as preview image
	 *
	 * @param pictureData the preview image
	 */
    ObjectShape createOleShape(PictureData pictureData);
}