poi/src/main/java/org/apache/poi/ss/usermodel/DifferentialStyleProvider.java

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   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
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package org.apache.poi.ss.usermodel;

/**
 * Interface for classes providing differential style definitions, such as conditional format rules
 * and table/pivot table styles.
 *
 * @since 3.17 beta 1
 */
public interface DifferentialStyleProvider {

    /**
     * @return - border formatting object  if defined,  {@code null} otherwise
     */
    BorderFormatting getBorderFormatting();

    /**
     * @return - font formatting object  if defined,  {@code null} otherwise
     */
    FontFormatting getFontFormatting();

    /**
     *
     * @return number format defined for this rule, or null if the cell default should be used
     */
    ExcelNumberFormat getNumberFormat();

    /**
     * @return - pattern formatting object if defined, {@code null} otherwise
     */
    PatternFormatting getPatternFormatting();

    /**
     * This is the number of rows or columns in a band or stripe.
     * For styles that represent stripes, it must be > 1, for all others it is 0.
     * Not the greatest overloading by the OOXML spec.
     * @return number of rows/columns in a stripe for stripe styles, 0 for all others
     */
    int getStripeSize();
}