budgetdata.java

随书的代码

import java.io.*;
import java.util.*;


public class BudgetData {

  public static List parse(InputStream src) throws IOException {
      
    // The document as published by the OMB is encoded in Latin-1
    InputStreamReader isr = new InputStreamReader(src, "8859_1");
    BufferedReader in = new BufferedReader(isr);
    List records = new ArrayList();  
    String lineItem;
    while ((lineItem = in.readLine()) != null) {
      records.add(splitLine(lineItem));
    }       
    return records;
        
  } 

  // the field names in order
  public final static String[] keys = {
    "AgencyCode",
    "AgencyName",
    "BureauCode",
    "BureauName",
    "AccountCode",
    "AccountName",
    "TreasuryAgencyCode",
    "SubfunctionCode",
    "SubfunctionTitle",
    "BEACategory",
    "On-Off-BudgetIndicator",
    "FY1976", "TransitionQuarter", "FY1977", "FY1978", "FY1979",  
    "FY1980", "FY1981", "FY1982", "FY1983", "FY1984", "FY1985",  
    "FY1986", "FY1987", "FY1988", "FY1989", "FY1990", "FY1991",  
    "FY1992", "FY1993", "FY1994", "FY1995", "FY1996", "FY1997",  
    "FY1998", "FY1999", "FY2000", "FY2001", "FY2002", "FY2003", 
    "FY2004", "FY2005", "FY2006" 
   };

  private static Map splitLine(String record) {
     
    record = record.trim();
    
    int index = 0;
    Map result = new HashMap();
    for (int i = 0; i < keys.length; i++) {
      //find the next comma    
      StringBuffer sb = new StringBuffer();
      char c;
      boolean inString = false;
      while (true) {
        c = record.charAt(index);
        if (!inString && c == '"') inString = true;
        else if (inString && c == '"') inString = false;
        else if (!inString && c == ',') break;
        else sb.append(c);
        index++;
        if (index == record.length()) break;
      }
      String s = sb.toString().trim();
      result.put(keys[i], s);
      index++;
    }  
        
    return result;   
        
  } 

}