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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.draw.geom;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Objects;

/**
 * Definition of a custom geometric shape
 *
 *
 * Java class for CT_CustomGeometry2D complex type.
 *
 * 
The following schema fragment specifies the expected content contained within this class.
 *
 * 
 * <complexType name="CT_CustomGeometry2D">
 *   <complexContent>
 *     <restriction base="{http://www.w3.org/2001/XMLSchema}anyType">
 *       <sequence>
 *         <element name="avLst" type="{http://schemas.openxmlformats.org/drawingml/2006/main}CT_GeomGuideList" minOccurs="0"/>
 *         <element name="gdLst" type="{http://schemas.openxmlformats.org/drawingml/2006/main}CT_GeomGuideList" minOccurs="0"/>
 *         <element name="ahLst" type="{http://schemas.openxmlformats.org/drawingml/2006/main}CT_AdjustHandleList" minOccurs="0"/>
 *         <element name="cxnLst" type="{http://schemas.openxmlformats.org/drawingml/2006/main}CT_ConnectionSiteList" minOccurs="0"/>
 *         <element name="rect" type="{http://schemas.openxmlformats.org/drawingml/2006/main}CT_GeomRect" minOccurs="0"/>
 *         <element name="pathLst" type="{http://schemas.openxmlformats.org/drawingml/2006/main}CT_Path2DList"/>
 *       </sequence>
 *     </restriction>
 *   </complexContent>
 * </complexType>
 * 
 */
public final class CustomGeometry implements Iterable{
    final List adjusts = new ArrayList<>();
    final List guides = new ArrayList<>();
    final List paths = new ArrayList<>();
    final List handles = new ArrayList<>();
    final List connections = new ArrayList<>();
    Path textBounds;

    public void addAdjustGuide(AdjustValueIf guide) {
        adjusts.add(guide);
    }

    public void addGeomGuide(GuideIf guide) {
        guides.add(guide);
    }

    public void addAdjustHandle(AdjustHandle handle) {
        handles.add(handle);
    }

    public void addConnectionSite(ConnectionSiteIf connection) {
        connections.add(connection);
    }

    public void addPath(PathIf path) {
        paths.add(path);
    }

    public void setTextBounds(String left, String top, String right, String bottom) {
        textBounds = new Path();
        textBounds.addCommand(moveTo(left,top));
        textBounds.addCommand(lineTo(right, top));
        textBounds.addCommand(lineTo(right, bottom));
        textBounds.addCommand(lineTo(left, bottom));
        textBounds.addCommand(new ClosePathCommand());
    }

    private static MoveToCommand moveTo(String x, String y) {
        AdjustPoint pt = new AdjustPoint();
        pt.setX(x);
        pt.setY(y);
        MoveToCommand cmd = new MoveToCommand();
        cmd.setPt(pt);
        return cmd;
    }

    private static LineToCommand lineTo(String x, String y) {
        AdjustPoint pt = new AdjustPoint();
        pt.setX(x);
        pt.setY(y);
        LineToCommand cmd = new LineToCommand();
        cmd.setPt(pt);
        return cmd;
    }


    @Override
    public Iterator iterator() {
        return paths.iterator();
    }

    public Path getTextBounds(){
        return textBounds;
    }


    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (!(o instanceof CustomGeometry)) return false;
        CustomGeometry that = (CustomGeometry) o;
        return Objects.equals(adjusts, that.adjusts) &&
                Objects.equals(guides, that.guides) &&
                Objects.equals(handles, that.handles) &&
                Objects.equals(connections, that.connections) &&
                Objects.equals(textBounds, that.textBounds) &&
                Objects.equals(paths, that.paths);
    }

    @Override
    public int hashCode() {
        return Objects.hash(adjusts, guides, handles, connections, textBounds, paths);
    }
}