import org.apache.poi.xwpf.usermodel.*;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.*;

import java.math.BigInteger;


public class DeleteAbstractNumBug {
	public static void main(String[] args){

		XWPFDocument doc = new XWPFDocument();

		XWPFNumbering numbering = doc.createNumbering();

		for(int i = 10; i >= 0; i--){
			addNumberingWithAbstractId(numbering, i);		//add numbers in reverse order
		}

		printAbstractNums(numbering);						//print the AbstractNumIds
		numbering.removeAbstractNum(BigInteger.valueOf(2));	//attempt to remove item with numId 2
														//actually removes item with numId 8 (index 2)
		printAbstractNums(numbering);
	}

	private static void printAbstractNums(XWPFNumbering numbering) {
		for (int i = 0; i <= 10; i++) {
			XWPFAbstractNum abstractNum = numbering.getAbstractNum(BigInteger.valueOf(i));
			if (abstractNum != null)
				System.out.printf("%d ", abstractNum.getCTAbstractNum().getAbstractNumId());
		}
		System.out.print("\n");
	}

	private static BigInteger addNumberingWithAbstractId(XWPFNumbering documentNumbering, int id){

		CTAbstractNum cTAbstractNum = CTAbstractNum.Factory.newInstance();		//create a numbering scheme
		cTAbstractNum.setAbstractNumId(BigInteger.valueOf(id));					//give the scheme an ID

		XWPFAbstractNum abstractNum = new XWPFAbstractNum(cTAbstractNum);
		BigInteger abstractNumID = documentNumbering.addAbstractNum(abstractNum);

		/*return an ID for the numbering*/
		BigInteger bigInteger = documentNumbering.addNum(abstractNumID);
		return bigInteger;
	}
}