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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 org.apache.poi.ss.usermodel.Color;
import org.apache.poi.ss.usermodel.DataBarFormatting;
import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTDataBar;

/**
 * High level representation for DataBar / Data Bar Formatting 
 *  component of Conditional Formatting settings
 */
public class XSSFDataBarFormatting implements DataBarFormatting {
    IndexedColorMap _colorMap;
    CTDataBar _databar;

    /*package*/ XSSFDataBarFormatting(CTDataBar databar, IndexedColorMap colorMap){
        _databar = databar;
        _colorMap = colorMap;
    }

    public boolean isIconOnly() {
        if (_databar.isSetShowValue())
            return !_databar.getShowValue();
        return false;
    }
    public void setIconOnly(boolean only) {
        _databar.setShowValue(!only);
    }

    public boolean isLeftToRight() {
        return true;
    }
    public void setLeftToRight(boolean ltr) {
        // TODO How does XSSF encode this?
    }

    public int getWidthMin() {
        return 0;
    }
    public void setWidthMin(int width) {
        // TODO How does XSSF encode this?
    }

    public int getWidthMax() {
        return 100;
    }
    public void setWidthMax(int width) {
        // TODO How does XSSF encode this?
    }

    public XSSFColor getColor() {
        return XSSFColor.from(_databar.getColor(), _colorMap);
    }
    public void setColor(Color color) {
        _databar.setColor( ((XSSFColor)color).getCTColor() );
    }

    public XSSFConditionalFormattingThreshold getMinThreshold() {
        return new XSSFConditionalFormattingThreshold(_databar.getCfvoArray(0));
    }
    public XSSFConditionalFormattingThreshold getMaxThreshold() {
        return new XSSFConditionalFormattingThreshold(_databar.getCfvoArray(1));
    }

    public XSSFConditionalFormattingThreshold createThreshold() {
        return new XSSFConditionalFormattingThreshold(_databar.addNewCfvo());
    }
}