record_filter.java

本光盘是《J2ME无线移动游戏开发》一书的配套光盘

package ch12;

import javax.microedition.rms.*;

public class Record_Filter
    implements RecordFilter {

  //声明一个代表记录中姓名的临时变量
  private String filterName = null;

  //声明一个代表记录中欲过滤的姓名值
  private String name;

  //声明一个代表ID号的临时整型变量
  private int filterID;

  //声明一个代表记录中欲过滤的ID值
  private int id;

  /*
    1.构造器
   */
  public Record_Filter(int id) {
    this.id = id;
  }

  /*
    2.构造器
   */
  public Record_Filter(String name) {
    this.name = name;
  }

  /*
    3.搜索记录
   */
  public boolean matches(byte[] candidate) {
    String _name;
    int _id;
    ByteArrayToRecord batr = new ByteArrayToRecord(candidate);
    _id = batr.getID();
    _name = batr.getName();

    //按name搜索
    if (name != null) {
      filterName = _name;
      if (filterName.equals(name)) {
        return true;
      }
      else {
        return false;
      }
    }
    //按id搜索
    else {
      filterID = _id;
      if (filterID == id) {
        return true;
      }
      else {
        return false;
      }
    }
  }

}