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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.xssf.usermodel;

import javax.xml.namespace.QName;

import org.apache.poi.ooxml.POIXMLDocumentPart;
import org.apache.poi.util.Internal;
import org.apache.xmlbeans.XmlCursor;
import org.openxmlformats.schemas.drawingml.x2006.main.CTGraphicalObjectData;
import org.openxmlformats.schemas.drawingml.x2006.main.CTNonVisualDrawingProps;
import org.openxmlformats.schemas.drawingml.x2006.main.CTPoint2D;
import org.openxmlformats.schemas.drawingml.x2006.main.CTPositiveSize2D;
import org.openxmlformats.schemas.drawingml.x2006.main.CTShapeProperties;
import org.openxmlformats.schemas.drawingml.x2006.main.CTTransform2D;
import org.openxmlformats.schemas.drawingml.x2006.spreadsheetDrawing.CTGraphicalObjectFrame;
import org.openxmlformats.schemas.drawingml.x2006.spreadsheetDrawing.CTGraphicalObjectFrameNonVisual;
import org.openxmlformats.schemas.officeDocument.x2006.relationships.STRelationshipId;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

/**
 * Represents DrawingML GraphicalObjectFrame.
 *
 * @author Roman Kashitsyn
 */
public final class XSSFGraphicFrame extends XSSFShape {

	private static CTGraphicalObjectFrame prototype;

	private CTGraphicalObjectFrame graphicFrame;

	/**
	 * Construct a new XSSFGraphicFrame object.
	 *
	 * @param drawing the XSSFDrawing that owns this frame
	 * @param ctGraphicFrame the XML bean that stores this frame content
	 */
	protected XSSFGraphicFrame(XSSFDrawing drawing, CTGraphicalObjectFrame ctGraphicFrame) {
		this.drawing = drawing; // protected field on XSSFShape
		this.graphicFrame = ctGraphicFrame;
		// TODO: there may be a better way to delegate this
		CTGraphicalObjectData graphicData = graphicFrame.getGraphic().getGraphicData();
        if (graphicData != null) {
            NodeList nodes = graphicData.getDomNode().getChildNodes();
            for (int i = 0; i < nodes.getLength(); i++) {
                final Node node = nodes.item(i);
                // if the frame references a chart, associate the chart with this instance
                if (node.getNodeName().equals("c:chart")) {
                    // this better succeed or the document is invalid
                    POIXMLDocumentPart relation = drawing.getRelationById(node.getAttributes().getNamedItem("r:id").getNodeValue());
                    // Do XWPF charts need similar treatment?
                    if (relation instanceof XSSFChart) {
                        ((XSSFChart) relation).setGraphicFrame(this);
                    }
                }
            }
        }
	}

	@Internal
	public CTGraphicalObjectFrame getCTGraphicalObjectFrame() {
		return graphicFrame;
	}

	/**
	 * Initialize default structure of a new graphic frame
	 */
	protected static CTGraphicalObjectFrame prototype() {
		if (prototype == null) {
			CTGraphicalObjectFrame graphicFrame = CTGraphicalObjectFrame.Factory.newInstance();

			CTGraphicalObjectFrameNonVisual nvGraphic = graphicFrame.addNewNvGraphicFramePr();
			CTNonVisualDrawingProps props = nvGraphic.addNewCNvPr();
			props.setId(0);
			props.setName("Diagramm 1");
			nvGraphic.addNewCNvGraphicFramePr();

			CTTransform2D transform = graphicFrame.addNewXfrm();
			CTPositiveSize2D extPoint = transform.addNewExt();
			CTPoint2D offPoint = transform.addNewOff();

			extPoint.setCx(0);
			extPoint.setCy(0);
			offPoint.setX(0);
			offPoint.setY(0);

			/* CTGraphicalObject graphic = */ graphicFrame.addNewGraphic();

			prototype = graphicFrame;
		}
		return prototype;
	}

	/**
	 * Sets the frame macro.
	 */
	public void setMacro(String macro) {
		graphicFrame.setMacro(macro);
	}

	/**
	 * Sets the frame name.
	 */
	public void setName(String name) {
		getNonVisualProperties().setName(name);
	}

	/**
	 * Returns the frame name.
	 * @return name of the frame
	 */
	public String getName() {
		return getNonVisualProperties().getName();
	}

	private CTNonVisualDrawingProps getNonVisualProperties() {
		CTGraphicalObjectFrameNonVisual nvGraphic = graphicFrame.getNvGraphicFramePr();
		return nvGraphic.getCNvPr();
	}

	/**
	 * Attaches frame to an anchor.
	 */
	protected void setAnchor(XSSFClientAnchor anchor) {
		this.anchor = anchor;
	}

	/**
	 * Returns the frame anchor.
	 * @return the XSSFClientAnchor anchor this frame is attached to
	 */
	public XSSFClientAnchor getAnchor() {
		return (XSSFClientAnchor) anchor;
	}

	/**
	 * Assign a DrawingML chart to the graphic frame.
	 */
	protected void setChart(XSSFChart chart, String relId) {
		CTGraphicalObjectData data = graphicFrame.getGraphic().addNewGraphicData();
		appendChartElement(data, relId);
		chart.setGraphicFrame(this);
	}

	/**
	 * Gets the frame id.
	 */
	public long getId() {
		return graphicFrame.getNvGraphicFramePr().getCNvPr().getId();
	}

	/**
	 * Sets the frame id.
	 */
	protected void setId(long id) {
		graphicFrame.getNvGraphicFramePr().getCNvPr().setId(id);
	}

	/**
	 * The low level code to insert {@code } tag into
	 * {@code}.
	 *
	 * Here is the schema (ECMA-376):
	 * 	 * {@code
	 * 
	 *   
	 *     
	 *   
	 *   
	 * 
	 * }
	 * 
	 */
	private void appendChartElement(CTGraphicalObjectData data, String id) {
		String r_namespaceUri = STRelationshipId.type.getName().getNamespaceURI();
		String c_namespaceUri = XSSFDrawing.NAMESPACE_C;
		XmlCursor cursor = data.newCursor();
		cursor.toNextToken();
		cursor.beginElement(new QName(c_namespaceUri, "chart", "c"));
		cursor.insertAttributeWithValue(new QName(r_namespaceUri, "id", "r"), id);
		cursor.dispose();
		data.setUri(c_namespaceUri);
	}

    @Override
    protected CTShapeProperties getShapeProperties(){
        return null;
    }

    @Override
    public String getShapeName() {
        return graphicFrame.getNvGraphicFramePr().getCNvPr().getName();
    }
}