content: package com.alibaba.excel.read.metadata.holder.xlsx;
  
  import java.util.Deque;
  import java.util.LinkedList;
  
  import com.alibaba.excel.read.metadata.ReadSheet;
  import com.alibaba.excel.read.metadata.holder.ReadSheetHolder;
  import com.alibaba.excel.read.metadata.holder.ReadWorkbookHolder;
  
  import lombok.EqualsAndHashCode;
  import lombok.Getter;
  import lombok.Setter;
  import org.apache.poi.openxml4j.opc.PackageRelationshipCollection;
  
  /**
   * sheet holder
   *
   * @author Jiaju Zhuang
   */
  @Getter
  @Setter
  @EqualsAndHashCode
  public class XlsxReadSheetHolder extends ReadSheetHolder {
      /**
       * Record the label of the current operation to prevent NPE.
       */
      private Deque<String> tagDeque;
      /**
       * Current Column
       */
      private Integer columnIndex;
      /**
       * Data for current label.
       */
      private StringBuilder tempData;
      /**
       * Formula for current label.
       */
      private StringBuilder tempFormula;
      /**
       * excel Relationship
       */
      private PackageRelationshipCollection packageRelationshipCollection;
  
      public XlsxReadSheetHolder(ReadSheet readSheet, ReadWorkbookHolder readWorkbookHolder) {
          super(readSheet, readWorkbookHolder);
          this.tagDeque = new LinkedList<String>();
          packageRelationshipCollection
              = ((XlsxReadWorkbookHolder)readWorkbookHolder).getPackageRelationshipCollectionMap().get(
              readSheet.getSheetNo());
      }
  }
  