!!! Listings zum Artikel "Zur Erinnerung"
!!! von Christoph Baeni in iX 2/2011, S. 126

!!! Listing 1: Termine auslesen

import java.io.*;
import java.net.*;

import com.google.gdata.client.calendar.*;
import com.google.gdata.data.*;
import com.google.gdata.data.calendar.*;
import com.google.gdata.data.extensions.*;
import com.google.gdata.data.extensions.BaseEventEntry.*;
import com.google.gdata.util.*;

public class ReadEvents {
  private static boolean isBusy(CalendarEventEntry event) {
    Transparency transparency = event.getTransparency();
    return Transparency.TRANSPARENT.equals(transparency);
  }
  
  public static void main(String[] args)
    throws IOException, ServiceException {
    CalendarService service =
      new CalendarService("iX-exampleApp-1");
    service.setUserCredentials("xy@gmail.com", "secret");

    String feedUrl = "https://www.google.com"  
      + "/calendar/feeds/default/private/full";
    CalendarQuery query =
      new CalendarQuery(new URL(feedUrl));
    query.setMinimumStartTime(
      DateTime.parseDateTime("2011-01-01T00:00:00"));
    query.setMaximumStartTime(
      DateTime.parseDateTime("2011-01-31T23:59:59"));
    query.setStringCustomParameter("singleevents", "true");
    query.setMaxResults(1024);

    CalendarEventFeed results =
      service.query(query, CalendarEventFeed.class);
    String calTitle = results.getTitle().getPlainText();
    System.out.println("Kalender-Titel: " + calTitle);
    System.out.println("Termine:");
    for (CalendarEventEntry event : results.getEntries()) {
      String title = event.getTitle().getPlainText();
      System.out.println(title);
      for (When time : event.getTimes()) {
        DateTime start = time.getStartTime();
        DateTime end = time.getEndTime();
        String freeBusy =
          isBusy(event) ? "verfügbar" : "beschäftigt";
        if (!start.isDateOnly() && !end.isDateOnly()) {
          System.out.println(" " + start.toUiString()
            + " - " + end.toUiString() + ": " + freeBusy);
        } else {
          System.out.println(" ganztags "
            + start.toUiString() + " - "
            + end.toUiString() + ": " + freeBusy);
        }
      }
    }
  }
}

!!! Listing 2: Mehrere Kalender abfragen

import java.io.*;
import java.net.*;

import com.google.gdata.client.calendar.*;
import com.google.gdata.data.calendar.*;
import com.google.gdata.util.*;

public class MultiCalendar {
  private static boolean isWritable(CalendarEntry entry) {
    AccessLevelProperty level = entry.getAccessLevel();
    return level.equals(AccessLevelProperty.OWNER)
      || level.equals(AccessLevelProperty.ROOT)
      || level.equals(AccessLevelProperty.EDITOR);
  }

  public static void main( String[] args )
    throws IOException, ServiceException {
    CalendarService service =
      new CalendarService("iX-exampleApp-1");
    service.setUserCredentials("xy@gmail.com", "secret");

    String feedUrl = "https://www.google.com"  
      + "/calendar/feeds/default/allcalendars/full";
    CalendarFeed resultFeed = 
      service.getFeed(new URL(feedUrl), CalendarFeed.class);
    
    System.out.println("Ihre Kalender:");
    boolean primary = true;
    for (CalendarEntry calendar: resultFeed.getEntries()) {
      String title = calendar.getTitle().getPlainText();
      Boolean writable = isWritable(calendar);
      URL calFeedUrl = 
        new URL(calendar.getLinks().get(0).getHref());

      System.out.print(title + (primary ? " * " : " "));
      System.out.println(writable ? "r/w" : "r");
      System.out.println("  " + calFeedUrl);

      primary = false;
    }
  }
}

!!! Listing 3: Termine eintragen

import java.io.*;
import java.net.*;

import com.google.gdata.client.calendar.*;
import com.google.gdata.client.calendar.CalendarQuery.*;
import com.google.gdata.data.*;
import com.google.gdata.data.calendar.*;
import com.google.gdata.data.extensions.*;
import com.google.gdata.util.*;

public class WriteEvents {
  public static void main(String[] args)
    throws IOException, ServiceException {
    String feedUrl = "https://www.google.com"  
      + "/calendar/feeds/default/private/full";

    CalendarService service =
      new CalendarService("iX-exampleApp-1");
    service.setUserCredentials("xy@gmail.com", "secret");
    
    CalendarEventEntry entry = new CalendarEventEntry();
    entry.setTitle(
      new PlainTextConstruct("Abendessen mit Hans"));
    entry.setContent(
      new PlainTextConstruct("Zur Feier des Release"));

    DateTime startTime =
      DateTime.parseDateTime("2011-01-17T17:00:00");
    DateTime endTime =
      DateTime.parseDateTime("2011-01-17T18:00:00");
    When eventTimes = new When();
    eventTimes.setStartTime(startTime);
    eventTimes.setEndTime(endTime);
    entry.addTime(eventTimes);

    ExtendedProperty property = new ExtendedProperty();
    property.setName("de.ix.creator");
    property.setValue("iX-exampleApp");
    entry.addExtension(property);

    CalendarEventEntry insertedEvent =
      service.insert(new URL(feedUrl), entry);
    System.out.println("Event hinzugefuegt, id="
      + insertedEvent.getId());

    CalendarQuery query =
      new CalendarQuery(new URL(feedUrl));
    query.setMinimumStartTime(
      DateTime.parseDateTime("2011-01-01T00:00:00"));
    query.setMaximumStartTime(
      DateTime.parseDateTime("2011-12-31T23:59:59"));
    query.setStringCustomParameter("singleevents", "true");
    query.setExtendedPropertyQuery(
      new ExtendedPropertyMatch(
        "de.ix.creator", "iX-exampleApp"));
    CalendarEventFeed results =
      service.query(query, CalendarEventFeed.class);
    System.out.println("Events anpassen...");
    for (CalendarEventEntry event : results.getEntries()) {
      String title = event.getTitle().getPlainText();
      System.out.println(" * " + title);
      title = title.replaceAll("Hans", "Fritz");
      event.setTitle(new PlainTextConstruct(title));
      URL editUrl = new URL(event.getEditLink().getHref());
      CalendarEventEntry updatedEvent =
        service.update(editUrl, event, event.getEtag());
    }

    CalendarQuery query2 =
      new CalendarQuery(new URL(feedUrl));
    query2.setExtendedPropertyQuery(
      new ExtendedPropertyMatch(
        "de.ix.creator", "iX-exampleApp"));
    CalendarEventFeed toDel =
      service.query(query2, CalendarEventFeed.class);
    System.out.println("Events loeschen...");
    for (CalendarEventEntry event : toDel.getEntries()) {
      String title = event.getTitle().getPlainText();
      System.out.println(" * " + title);
      URL deleteUrl =
        new URL(event.getEditLink().getHref());
      service.delete(deleteUrl, event.getEtag());
    }
  }
}