Java-String Mapper Reflection

package train.bookstore.bo;

import java.lang.reflect.Field;
import java.util.LinkedHashMap;
import org.kuali.rice.kns.bo.PersistableBusinessObjectBase;

public class BookOrderEntry extends PersistableBusinessObjectBase {
    private Long id;
    private Integer quantity;
    private String documentId;
    private Long bookId;
    private Book book;

    @Override
    protected LinkedHashMap toStringMapper() {
        LinkedHashMap<String, Object> map = new LinkedHashMap<String, Object>();
        Field[] fields = this.getClass().getFields();
        for (int i = 0; i < fields.length; i++) {
            Field field = fields[i];
            try {
                map.put(field.getName(), field.get(this));
            } catch (IllegalArgumentException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IllegalAccessException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        return map;
    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public Integer getQuantity() {
        return quantity;
    }

    public void setQuantity(Integer quantity) {
        this.quantity = quantity;
    }

    public String getDocumentId() {
        return documentId;
    }

    public void setDocumentId(String documentId) {
        this.documentId = documentId;
    }

    public Long getBookId() {
        return bookId;
    }

    public void setBookId(Long bookId) {
        this.bookId = bookId;
    }

    public Book getBook() {
        return book;
    }

    public void setBook(Book book) {
        this.book = book;
    }

}