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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.streaming;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.poi.common.usermodel.HyperlinkType;
import org.apache.poi.ss.usermodel.ClientAnchor;
import org.apache.poi.ss.usermodel.CreationHelper;
import org.apache.poi.ss.usermodel.DataFormat;
import org.apache.poi.ss.usermodel.ExtendedColor;
import org.apache.poi.ss.usermodel.Hyperlink;
import org.apache.poi.ss.util.AreaReference;
import org.apache.poi.ss.util.CellReference;
import org.apache.poi.util.Internal;
import org.apache.poi.xssf.usermodel.XSSFCreationHelper;
import org.apache.poi.xssf.usermodel.XSSFRichTextString;

/**
 * Streaming Creation Helper, which performs some actions
 *  based on the Streaming Workbook, and some on the related
 *  regular XSSF Workbook
 */
public class SXSSFCreationHelper implements CreationHelper {
    private static final Logger LOG = LogManager.getLogger(SXSSFCreationHelper.class);

    private final SXSSFWorkbook wb;
    private final XSSFCreationHelper helper;

    /**
     * Should only be called by {@link SXSSFWorkbook#getCreationHelper()}
     *
     * @param workbook the workbook to create objects for
     */
    @Internal
    public SXSSFCreationHelper(SXSSFWorkbook workbook) {
        this.helper = new XSSFCreationHelper(workbook.getXSSFWorkbook());
        this.wb = workbook;
    }

    @Override
    public XSSFRichTextString createRichTextString(String text) {
        LOG.atInfo().log("SXSSF doesn't support Rich Text Strings, any formatting information will be lost");
        return new XSSFRichTextString(text);
    }

    @Override
    public SXSSFFormulaEvaluator createFormulaEvaluator() {

        return new SXSSFFormulaEvaluator(wb);
    }

    // Pass-through methods
    @Override
    public DataFormat createDataFormat() {
        return helper.createDataFormat();
    }
    @Override
    public Hyperlink createHyperlink(HyperlinkType type) {
        return helper.createHyperlink(type);
    }
    @Override
    public ExtendedColor createExtendedColor() {
        return helper.createExtendedColor();
    }
    @Override
    public ClientAnchor createClientAnchor() {
        return helper.createClientAnchor();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public AreaReference createAreaReference(String reference) {
        return new AreaReference(reference, wb.getSpreadsheetVersion());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public AreaReference createAreaReference(CellReference topLeft, CellReference bottomRight) {
        return new AreaReference(topLeft, bottomRight, wb.getSpreadsheetVersion());
    }

}