corporation.java

此程序都是企业级 的数据库开发程序 全面揭示了JAVA对数据库的操作

import java.util.*;

import org.jlf.log.*;
import org.jlf.dataMap.*;

/**
 * This class hold information for a corporate
 * customer to give volume discounts for their purchases.
 */
public class Corporation extends VolumeCustomer {

  // --------------------------------------------------------------
  // Section 1: DataMappedObject descriptors
  // --------------------------------------------------------------

  // Constants for attributes
  public static final String COMPANY_NAME_ATTRIBUTE = "COMPANY_NAME";

  /**
   * Adds attribute descriptors for the current class.
   */
  protected Hashtable basicGetAttributeDescriptors() {

    // Always call the superclass!
    Hashtable descriptors = super.basicGetAttributeDescriptors();
    DataAttributeDescriptor descriptor;

    // Then add class-specific attributes
    descriptor = new DataAttributeDescriptor(COMPANY_NAME_ATTRIBUTE, 
                                             StringAttribute.class, false);
    descriptor.setMaximumLength(50);
    descriptors.put(COMPANY_NAME_ATTRIBUTE, descriptor);

    return descriptors;
  } 

  /**
   * Default constructor must be public for the data mapping
   * framework!  However, when creating a new object, look to use
   * a paramterized constructor.
   */
  public Corporation() {}


  // --------------------------------------------------------------
  // Section 2: Java bean and business logic methods
  // --------------------------------------------------------------

  /**
   * Main constructor for the class.  Populates all
   * attributes of the class and sets the type accordingly.
   */
  public Corporation(String nickname, String emailAddress, String name, 
                     String companyName, String address, String city, 
                     String state, String zipcode) {
    super(nickname, emailAddress, name, address, city, state, zipcode);
    setCompanyName(companyName);
    resetCustomerType(CustomerType.CORPORATE_CUSTOMER);
  }

  /**
   * Retrieves the Corporation's name.
   */
  public String getCompanyName() {
    return getStringAttribute(COMPANY_NAME_ATTRIBUTE);
  } 

  /**
   * Sets the Corporation's name.
   */
  public void setCompanyName(String name) {
    setStringAttribute(COMPANY_NAME_ATTRIBUTE, name);
  } 

  /**
   * Return the amount of discount applicable to the volume
   * customer.  Give a 10% discount to all corporations.
   */
  public double discountRate() {
    return 0.10;
  } 

  /**
   * Add to superclass to output additional
   * volume customer attributes
   */
  public String toString() {
    return super.toString() + "\n  Company Name: " + getCompanyName();
  } 

}