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The Jadex kernel extension envsupport allows for using 2D spaces in concert with components.
package jadex.extension.envsupport.environment;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import jadex.bridge.service.annotation.Reference;
import jadex.bridge.service.types.clock.IClockService;
import jadex.commons.SReflect;
import jadex.commons.collection.MultiCollection;
import jadex.commons.future.IResultListener;
import jadex.extension.envsupport.MObjectType;
import jadex.extension.envsupport.environment.space2d.Space2D;
import jadex.javaparser.IParsedExpression;
import jadex.javaparser.SimpleValueFetcher;
/**
* Default implementation of a space object.
*/
@Reference
public class SpaceObject extends SynchronizedPropertyObject implements ISpaceObject
{
//-------- attributes --------
/** The object's ID. */
protected Object id;
/** The object's typename. */
protected String typename;
/** The object's tasks. */
protected Map tasks;
/** The task listeners. */
protected MultiCollection> tasklisteners;
/** The fetcher. */
protected SimpleValueFetcher fetcher;
/** The space. */
protected AbstractEnvironmentSpace space;
//-------- constructors --------
/**
* Creates a new EnvironmentObject.
*
* @param objectId the object's ID
* @param typename the object's type
* @param properties initial properties (may be null)
* @param propertiesMeta the meta data of the properties
* @param tasks initial task list (may be null)
*/
public SpaceObject(Object id, MObjectType type, Map properties, List tasks, Object monitor, AbstractEnvironmentSpace space)
{
super(type, monitor);
this.id = id;
this.typename = type.getName();
this.properties = properties;
this.space = space;
this.tasks = new LinkedHashMap();
if(tasks != null)
{
for(Iterator it = tasks.iterator(); it.hasNext(); )
{
IObjectTask task = (IObjectTask)it.next();
this.tasks.put(task.getProperty(IObjectTask.PROPERTY_ID), task);
}
}
this.fetcher = new SimpleValueFetcher(space.getFetcher());
fetcher.setValue("$object", this);
}
// HACK constructor!!!
// For what purpose space objects must be sent via service calls?
// Makes it easy to create 'wrong' space objects
// /**
// * Bean constructor.
// */
// public SpaceObject()
// {
// super(null, new Object());
// }
//-------- methods --------
/**
* Returns a property.
*
* @param name name of the property
* @return the property
*/
public Object getProperty(String name)
{
synchronized(monitor)
{
Object ret = super.getProperty(name);
if(ret instanceof IParsedExpression)
{
ret = ((IParsedExpression)ret).getValue(fetcher);
}
return ret;
}
}
/**
* Only for debugging.
*/
public void setProperty(String name, Object value)
{
// if(getType().equals("prey") && name.equals(Space2D.PROPERTY_POSITION))
// System.out.println("Setting: "+name+" "+value);
Object oldvalue;
// synchronized(getMonitor())
// {
oldvalue = super.getProperty(name);
super.setProperty(name, value);
// }
space.fireObjectEvent(this, name, oldvalue);
}
/**
* Get the objects id.
* @return The object id.
*/
public Object getId()
{
// synchronized(monitor)
// {
return id;
// }
}
/**
* Set the id of the object.
*/
// Bean setter.
public void setId(Object id)
{
synchronized(monitor)
{
this.id = id;
}
}
/**
* Returns the type of the object.
* @return the type
*/
public String getType()
{
// synchronized(monitor)
// {
return typename;
// }
}
/**
* Set the type of the object.
*/
// Bean setter.
public void setType(String type)
{
synchronized(monitor)
{
typename = type;
}
}
/**
* Adds a new task for the object.
* @param task new task
*/
public void addTask(IObjectTask task)
{
synchronized(monitor)
{
if(tasks.containsKey(task.getProperty(IObjectTask.PROPERTY_ID)))
throw new RuntimeException("Task already exists: "+this+", "+task);
task.start(this);
tasks.put(task.getProperty(IObjectTask.PROPERTY_ID), task);
}
}
/**
* Removes a task from the object.
* @param task The task.
*/
public void removeTask(Object taskid, Exception e)
{
synchronized(monitor)
{
if(tasklisteners!=null && tasklisteners.containsKey(taskid))
{
Collection> listeners = tasklisteners.getCollection(taskid);
for(Iterator it=listeners.iterator(); it.hasNext(); )
{
if(e==null)
{
((IResultListener)it.next()).resultAvailable(taskid);
}
else
{
((IResultListener)it.next()).exceptionOccurred(e);
}
}
tasklisteners.remove(taskid);
if(tasklisteners.isEmpty())
tasklisteners = null;
}
IObjectTask task = getTask(taskid);
if(task!=null)
{
try
{
task.shutdown(this);
}
catch (Exception e2)
{
// Todo: logger.
e2.printStackTrace();
}
tasks.remove(taskid);
}
}
}
/**
* Returns all tasks of the object for introspection.
* @return all tasks of the object
*/
public Collection getTasks()
{
synchronized(monitor)
{
return tasks.values();
}
}
/**
* Get a specific task.
* @param id The task id.
* @return The task.
*/
public IObjectTask getTask(Object id)
{
synchronized(monitor)
{
return (IObjectTask)tasks.get(id);
}
}
/**
* Removes all tasks from the object.
*/
public void clearTasks()
{
synchronized(monitor)
{
IObjectTask[] atasks = (IObjectTask[])tasks.values().toArray(new IObjectTask[tasks.size()]);
for(int i = 0; i < atasks.length; ++i)
{
removeTask(atasks[i], null);
}
}
}
/**
* Add a result listener to a task.
* The result will be the task id.
* If the task is already finished, the listener will be notified.
*/
public void addTaskListener(Object taskid, IResultListener listener)
{
synchronized(monitor)
{
if(tasks.containsKey(taskid))
{
if(tasklisteners==null)
tasklisteners = new MultiCollection>();
tasklisteners.add(taskid, listener);
}
else
{
listener.resultAvailable(taskid);
}
}
}
/**
* Remove a result listener from a task.
*/
public void removeTaskListener(Object taskid, IResultListener listener)
{
synchronized(monitor)
{
if(tasklisteners!=null)
{
tasklisteners.removeObject(taskid, listener);
if(tasklisteners.isEmpty())
tasklisteners = null;
}
}
}
/**
* Updates the object to the current time.
* time the current time
* @param progress The time that has passed according to the environment executor.
* @param clock The clock service.
*/
public void updateObject(IEnvironmentSpace space, long progress, IClockService clock)
{
synchronized(monitor)
{
IObjectTask[] atasks = (IObjectTask[])tasks.values().toArray(new IObjectTask[tasks.size()]);
for(int i = 0; i < atasks.length; ++i)
{
try
{
if(!atasks[i].isFinished(space, this))
{
atasks[i].execute(space, this, progress, clock);
}
else
{
removeTask(atasks[i].getProperty(IObjectTask.PROPERTY_ID), null);
}
}
catch(Exception e)
{
// Todo: logger.
// e.printStackTrace();
if(tasklisteners!=null && tasklisteners.containsKey(atasks[i].getProperty(IObjectTask.PROPERTY_ID)))
{
Collection> listeners = tasklisteners.getCollection(atasks[i].getProperty(IObjectTask.PROPERTY_ID));
for(Iterator> it=listeners.iterator(); it.hasNext(); )
{
it.next().exceptionOccurred(e);
}
tasklisteners.remove(atasks[i].getProperty(IObjectTask.PROPERTY_ID));
if(tasklisteners.isEmpty())
tasklisteners = null;
}
removeTask(atasks[i].getProperty(IObjectTask.PROPERTY_ID), e);
}
}
}
}
/**
* Bean accessor.
* For serializing a space object,
* replace dynamic expressions with current values.
*/
public Map getProperties()
{
Map ret = new HashMap();
for(Iterator it=getPropertyNames().iterator(); it.hasNext(); )
{
String prop = (String)it.next();
ret.put(prop, getProperty(prop));
}
return ret;
}
/**
* Test if has a property.
*/
public boolean hasProperty(String name)
{
boolean ret = false;
synchronized(monitor)
{
MObjectType type = space.getSpaceObjectType(typename);
if(type!=null)
{
ret = type.getProperty(name)!=null;
}
}
return ret;
}
/**
* Get the string representation.
* @return The string representation.
*/
public String toString()
{
StringBuffer buf = new StringBuffer();
buf.append(SReflect.getInnerClassName(this.getClass()));
buf.append("(id=");
buf.append(getId());
buf.append(", type=");
buf.append(getType());
buf.append(", properties=");
buf.append(properties);
buf.append(", tasks=");
buf.append(tasks);
buf.append(")");
return buf.toString();
}
}