CVS Update: xmlpull-api-v1/src/java/samples

haustein    02/07/23 16:34:30

  Added:       src/java/samples pricelist.xml BestDeal.java
  Log:
  BestDeal example (untested) and example price list file added
  
  Revision  Changes    Path
  1.1                  xmlpull-api-v1/src/java/samples/pricelist.xml
  
  Index: pricelist.xml
  ===================================================================
  <?xml version="1.0"?>
   
  <xbe:price-list xmlns:xbe="http://www.psol.com/xbe2/listing8.3">
   <xbe:name>XML Training</xbe:name>
   <xbe:vendor>
    <xbe:name>Playfield Training</xbe:name>
    <xbe:price-quote delivery="5">999.00</xbe:price-quote>
    <xbe:price-quote delivery="15">899.00</xbe:price-quote>
   </xbe:vendor>
   <xbe:vendor>
    <xbe:name>XMLi</xbe:name>
    <xbe:price-quote delivery="3">2999.00</xbe:price-quote>
    <xbe:price-quote delivery="30">1499.00</xbe:price-quote>
    <xbe:price-quote delivery="45">699.00</xbe:price-quote>
   </xbe:vendor>
   <xbe:vendor>
    <xbe:name>WriteIT</xbe:name>
    <xbe:price-quote delivery="5">799.00</xbe:price-quote>
    <xbe:price-quote delivery="15">899.00</xbe:price-quote>
   </xbe:vendor>
   <xbe:vendor>
    <xbe:name>Emailaholic</xbe:name>
    <xbe:price-quote delivery="1">1999.00</xbe:price-quote>
   </xbe:vendor>
  </xbe:price-list>
  
  
  
  
  1.1                  xmlpull-api-v1/src/java/samples/BestDeal.java
  
  Index: BestDeal.java
  ===================================================================
  import org.xmlpull.v1.*;
  import java.io.*;
  import java.util.*;
  import java.text.MessageFormat;
  
  public class BestDeal {
  
      protected static final String MESSAGE =
          "The best deal is proposed by {0}. "
              + "A(n) {1} delivered in {2,number,integer} days for "
              + "{3,number,currency}";
  
      protected static final String NAMESPACE_URI =
          "http://www.psol.com/xbe2/listing8.3";
  
      /**
       * properties we are collecting: best price, delivery time,
       * product and vendor names
       */
  
      public double price = Double.MAX_VALUE;
      public int delivery = Integer.MAX_VALUE;
      public String product = null;
      public String vendor = null;
  
      /**
       * target delivery value (refuse elements above this target)
       */
  
      protected int targetDelivery;
  
      /**
       * creates an "empty" BestDeal with the given target for delivery
       * @param td the target for delivery
       */
  
      public BestDeal(int td) {
          targetDelivery = td;
      }
  
      /** updates the best deal from the given list in the format
      */
  
      public void update(XmlPullParser parser)
          throws IOException, XmlPullParserException {
  
          parser.require(parser.START_DOCUMENT, null, null);
  
          parser.nextTag();
          parser.require(parser.START_TAG, NAMESPACE_URI, "name");
          product = parser.nextText();
          parser.require(parser.END_TAG, NAMESPACE_URI, "name");
  
          parser.nextTag();
          parser.require(parser.START_TAG, NAMESPACE_URI, "price-list");
  
          while (parser.nextTag() == parser.START_TAG) {
              checkVendor(parser);
          }
  
          parser.require(parser.END_TAG, NAMESPACE_URI, "price-list");
  
          parser.next();
          parser.require(parser.END_DOCUMENT, null, null);
      }
  
      /** subroutine handling a single vendor */
  
      public void checkVendor(XmlPullParser parser)
          throws IOException, XmlPullParserException {
          parser.require(parser.START_TAG, NAMESPACE_URI, "vendor");
          parser.nextTag();
          String currentVendor = null;
  
          while (parser.nextTag() == parser.START_TAG) {
              parser.require(parser.START_TAG, NAMESPACE_URI, null);
              String name = parser.getName();
              if (name.equals("name"))
                  currentVendor = parser.nextText();
              else if (name.equals("price-quote")) {
                  int currentDelivery =
                      Integer.parseInt(parser.getAttributeValue("", "delivery"));
                  double currentPrice = Double.parseDouble(parser.nextText());
  
                  if (currentDelivery < delivery && currentPrice < price) {
                      vendor = currentVendor;
                      price = currentPrice;
                      delivery = currentDelivery;
                  }
              }
              else {
                  System.err.println(
                      "unknown element: "
                          + name
                          + " value: "
                          + parser.nextText());
              }
              parser.require(parser.END_TAG, NAMESPACE_URI, name);
          }
          parser.require(parser.END_TAG, NAMESPACE_URI, "vendor");
      }
  
      /**
       * main() method
       * decodes command-line parameters and invoke the parser
       * @param args command-line argument
       * @throw Exception catch-all for underlying exceptions
       */
  
      public static void main(String[] args)
          throws IOException, XmlPullParserException {
  
          if (args.length < 2) {
              System.out.println("BestDeal <file> <delivery>");
              return;
          }
  
          BestDeal bestDeal = new BestDeal(Integer.parseInt(args[1]));
  
          XmlPullParser parser =
              XmlPullParserFactory.newInstance().newPullParser();
  
          InputStream is = new FileInputStream(args[0]);
          parser.setInput(is, null);
          bestDeal.update(parser);
          parser.setInput(null);
          is.close();
  
          Object[] objects =
              new Object[] {
                  bestDeal.vendor,
                  bestDeal.product,
                  new Integer(bestDeal.delivery),
                  new Double(bestDeal.price)};
  
          System.out.println(MessageFormat.format(MESSAGE, objects));
      }
  
  }