gistfile1.java

/*
  Expect source file, one record per line:

  name;category;description;size;price;picture link;picture title

  Note: record entries can not contain semicolons... Maybe better separator?

  Also replace getNextRecord with different implementation based on your data source, this one does use file.
*/

public class LiferayPortlet extends ... {
  // Oddelovac casti v souboru
  protected static final String RECORD_SEPARATOR = ";"

  // HTML sablona pro vystup, casti {...} se nahradi udaji ze souboru
  protected static final String RECORD_TEMPLATE = "
    <div id=\"item\">
      <div id=\"item_content\">
        <div id="name">{NAME}</div>
        <div id="category" >{CATEGORY}</div>
		<div id="description">{DESCRIPTION}</div>
		<div id="size">{SIZE}</div>
        <div id="price">{PRICE}</div>
        <div id="picture"><img src="{PICTURE_LINK}" alt="{PICTURE_TITLE}" /></div>
	  </div>
	</div>
  ";

  protected BufferedReader sourceReader;

  public LiferayPortlet(String sourceFile) {
    // Rovnou otevrit soubor s clanky
    this.sourceReader = new BufferedReader(new FileReader(sourceFile));
  }

  // Vrati dalsi zaznam ze souboru nebo null
  // V pripade jineho zdroje dat nez soubor staci upravit
  protected String[] getNextRecord() {
    String line = sourceReader.readLine();
    if (line == null) {
      // End of file
      sourceReader.close();
      return null;
    }

    return line.split(RECORD_SEPARATOR);
  }

  // Vezme dalsi zaznam (je-li), vezme sablonu, nahradi v ni patricne daty ze zaznamu a vrati vysledne HTML
  public getHTMLForNextRecord() {
    String[] record = getNextRecord();
    if (record == null)
      return null;

	String output = RECORD_TEMPLATE;
	output = output.replace("\{NAME\}", record[0]);
	output = output.replace("\{CATEGORY\}", record[1]);
	output = output.replace("\{DESCRIPTION\}", record[2]);
	output = output.replace("\{SIZE\}", record[3]);
	output = output.replace("\{PRICE\}", record[4]);
	output = output.replace("\{PICTURE_LINK\}", record[5]);
	output = output.replace("\{PICTURE_TITLE\}", record[5]);

	return output;
  }

  /*
   * Just to show how to call it...
   */
  public static void main(String[] args) {
    // Spustit s cestou k nejakemu souboru s daty
    if (args.length != 2) {
	  System.out.println("Usage: program <source file>");
	  return;
	}

	// Vytvori se novy objekt LiferayPortlet (tahle trida) a preda se mu cesta k datum
	LiferayPortlet portlet = new LiferayPortlet(args[1]);

	String record;

	// Dokud record != null (v pripade konce souboru) vypise HTML pro kazdy zaznam
	while((record = this.getHTMLForNextRecord()) != null) {
	  System.out.println("Next record:");
	  System.out.println(record);
	}
  }
}