java.lang.Object
- jadex.bdi.examples.hunterprey_classic.environment.Environment

All Implemented Interfaces:

IEnvironment
```
public class Environment
extends java.lang.Object
implements IEnvironment
```
The environment is the container all objects and creatures.

Field Summary

Fields
Modifier and Type	Field	Description
`protected int`	`age`	The world age.
`protected java.util.Map`	`creatures`	The creatures.
`static int`	`DEFAULT_LEASE_TICKS`	The default number of lease ticks.
`protected java.util.Set`	`food`	The prey food.
`protected int`	`foodrate`	The foodrate determines how often new food pops up.
`protected java.util.List`	`highscore`	The highscore location.
`protected static Environment`	`instance`	The singleton instance.
`protected java.lang.Object`	`monitor`	The monitor.
`protected java.util.Set`	`obstacles`	The obstacles.
`protected SimplePropertyChangeSupport`	`pcs`	The helper object for bean events.
`protected java.util.Random`	`rand`	The radnom number generator.
`protected long`	`saveinterval`	The interval between saves of highscore (-1 for autosave off).
`protected long`	`savetime`	The last time the highscore was saved.
`protected int`	`sizex`	The horizontal size.
`protected int`	`sizey`	The vertictal size.
`protected java.util.List`	`tasklist`	The list for move and eat requests.
`MultiCollection`	`world`	All world objects accessible per location.

Constructor Summary

Constructors
Constructor Description

Environment()
Create a new environment.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Creature`	`addCreature(Creature creature)`	Add a new creature to the world.
`TaskInfo`	`addEatTask(Creature me, WorldObject obj)`	Add a move or eat action to the queue.
`void`	`addFood(Food nfood)`	Add a new prey food to the world.
`TaskInfo`	`addMoveTask(Creature me, java.lang.String dir)`	Add a move or eat action to the queue.
`void`	`addObstacle(Obstacle obstacle)`	Add a new obstacle to the world.
`void`	`addPropertyChangeListener(PropertyChangeListener listener)`	Add a PropertyChangeListener to the listener list.
`protected void`	`clearTaskList()`	Clear the TaskList HACK! Should be done in executeStep method, but that leads to problems with other Agents.
`protected Location`	`createLocation(Location loc, java.lang.String dir)`	Create a location.
`boolean`	`eat(Creature me, WorldObject food)`	Eat some object.
`void`	`executeStep()`	Execute a step.
`WorldObject[]`	`getAllObjects()`	Get all objects in the world (obstacles, food, and creature).
`protected Creature`	`getCreature(Creature creature)`	Get the internal representation of a creature.
`Creature[]`	`getCreatures()`	Get the creatures.
`protected Location`	`getEmptyLocation()`	Get an empty location.
`Food[]`	`getFood()`	Get the obstacles.
`int`	`getFoodrate()`	Get the foodrate.
`int`	`getHeight()`	Get the height of the world.
`Creature[]`	`getHighscore()`	Get the current highscore.
`static Environment`	`getInstance()`	Get the singleton.
`protected WorldObject[]`	`getNearObjects(Location loc, int range)`	Get objects near a position.
`Obstacle[]`	`getObstacles()`	Get the obstacles.
`long`	`getSaveInterval()`	Get the highscore save interval (-1 for autosave off).
`int`	`getTaskSize()`	Return the size of the task list.
`Vision`	`getVision(Creature me)`	Get the current vision.
`int`	`getWidth()`	Get the width of the world.
`int`	`getWorldAge()`	Get the world age.
`Vision`	`internalGetVision(Creature me)`	Get the current vision (without updating the creatures leaseticks).
`boolean`	`move(Creature me, java.lang.String dir)`	Perform a move.
`boolean`	`moveDown(Creature me)`	Move one field downwards.
`boolean`	`moveLeft(Creature me)`	Move one field to the left.
`boolean`	`moveRight(Creature me)`	Move one field to the right.
`boolean`	`moveUp(Creature me)`	Move one field upwards.
`boolean`	`removeCreature(Creature creature)`	Remove a creature to the world.
`boolean`	`removeFood(Food nfood)`	remove a prey food to the world.
`boolean`	`removeObstacle(Obstacle obstacle)`	Remove a obstacle to the world.
`void`	`removePropertyChangeListener(PropertyChangeListener listener)`	Remove a PropertyChangeListener from the listener list.
`void`	`saveHighscore()`	Save the highscore to a file.
`void`	`setFoodrate(int foodrate)`	Set the foodrate.
`void`	`setSaveInterval(long saveinterval)`	Set the highscore save interval (-1 for autosave off).

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - DEFAULT_LEASE_TICKS
```
public static final int DEFAULT_LEASE_TICKS
```
    The default number of lease ticks.
    
    See Also:
    
    Constant Field Values
  - instance
```
protected static Environment instance
```
    The singleton instance.
  - creatures
```
protected java.util.Map creatures
```
    The creatures.
  - obstacles
```
protected java.util.Set obstacles
```
    The obstacles.
  - food
```
protected java.util.Set food
```
    The prey food.
  - world
```
public MultiCollection world
```
    All world objects accessible per location.
  - sizex
```
protected int sizex
```
    The horizontal size.
  - sizey
```
protected int sizey
```
    The vertictal size.
  - monitor
```
protected java.lang.Object monitor
```
    The monitor.
  - tasklist
```
protected java.util.List tasklist
```
    The list for move and eat requests.
  - pcs
```
protected SimplePropertyChangeSupport pcs
```
    The helper object for bean events.
  - rand
```
protected java.util.Random rand
```
    The radnom number generator.
  - highscore
```
protected java.util.List highscore
```
    The highscore location.
  - savetime
```
protected long savetime
```
    The last time the highscore was saved.
  - saveinterval
```
protected long saveinterval
```
    The interval between saves of highscore (-1 for autosave off).
  - foodrate
```
protected int foodrate
```
    The foodrate determines how often new food pops up.
  - age
```
protected int age
```
    The world age.
- Constructor Detail
  - Environment
```
public Environment()
```
    Create a new environment.
- Method Detail
  - getInstance
```
public static Environment getInstance()
```
    Get the singleton.
    
    Returns:
    
    The environment.
  - moveUp
```
public boolean moveUp(Creature me)
```
    Move one field upwards. The method will block until the current simulation step has finished.
    
    Specified by:
    
    moveUp in interface IEnvironment
    
    Returns:
    
    True, when the operation succeeded.
  - moveDown
```
public boolean moveDown(Creature me)
```
    Move one field downwards. The method will block until the current simulation step has finished.
    
    Specified by:
    
    moveDown in interface IEnvironment
    
    Returns:
    
    True, when the operation succeeded.
  - moveLeft
```
public boolean moveLeft(Creature me)
```
    Move one field to the left. The method will block until the current simulation step has finished.
    
    Specified by:
    
    moveLeft in interface IEnvironment
    
    Returns:
    
    True, when the operation succeeded.
  - moveRight
```
public boolean moveRight(Creature me)
```
    Move one field to the right. The method will block until the current simulation step has finished.
    
    Specified by:
    
    moveRight in interface IEnvironment
    
    Returns:
    
    True, when the operation succeeded.
  - eat
```
public boolean eat(Creature me,
                   WorldObject food)
```
    Eat some object. The object has to be at the same location. This method does not block, and can be called multiple times during each simulation step.
    
    Specified by:
    
    eat in interface IEnvironment
    
    Parameters:
    
    food - The object.
    
    Returns:
    
    True, when the operation succeeded.
  - addEatTask
```
public TaskInfo addEatTask(Creature me,
                           WorldObject obj)
```
    Add a move or eat action to the queue.
  - addMoveTask
```
public TaskInfo addMoveTask(Creature me,
                            java.lang.String dir)
```
    Add a move or eat action to the queue.
  - clearTaskList
```
protected void clearTaskList()
```
    Clear the TaskList HACK! Should be done in executeStep method, but that leads to problems with other Agents. They compute their next step with the old vision. :-( This is a race condition too! Tasks can be lost.
  - internalGetVision
```
public Vision internalGetVision(Creature me)
```
    Get the current vision (without updating the creatures leaseticks).
    
    Parameters:
    
    me - The creature.
  - getVision
```
public Vision getVision(Creature me)
```
    Get the current vision. This method does not block, and can be called multiple times during each simulation step.
    
    Specified by:
    
    getVision in interface IEnvironment
    
    Parameters:
    
    me - The creature.
  - getWidth
```
public int getWidth()
```
    Get the width of the world.
  - getHeight
```
public int getHeight()
```
    Get the height of the world.
  - addFood
```
public void addFood(Food nfood)
```
    Add a new prey food to the world.
    
    Parameters:
    
    nfood - The new food.
  - removeFood
```
public boolean removeFood(Food nfood)
```
    remove a prey food to the world.
    
    Parameters:
    
    nfood - Thefood.
  - addObstacle
```
public void addObstacle(Obstacle obstacle)
```
    Add a new obstacle to the world.
    
    Parameters:
    
    obstacle - The new obstacle.
  - removeObstacle
```
public boolean removeObstacle(Obstacle obstacle)
```
    Remove a obstacle to the world.
    
    Parameters:
    
    obstacle - The obstacle.
  - addCreature
```
public Creature addCreature(Creature creature)
```
    Add a new creature to the world.
    
    Parameters:
    
    creature - The creature.
  - removeCreature
```
public boolean removeCreature(Creature creature)
```
    Remove a creature to the world.
    
    Parameters:
    
    creature - The creature.
  - executeStep
```
public void executeStep()
```
    Execute a step.
  - getWorldAge
```
public int getWorldAge()
```
    Get the world age.
    
    Returns:
    
    The age of the world.
  - getFoodrate
```
public int getFoodrate()
```
    Get the foodrate.
    
    Returns:
    
    The foodrate.
  - setFoodrate
```
public void setFoodrate(int foodrate)
```
    Set the foodrate.
    
    Parameters:
    
    foodrate - The foodrate.
  - move
```
public boolean move(Creature me,
                    java.lang.String dir)
```
    Perform a move.
    
    Parameters:
    
    me - The creature.
    
    dir - The direction.
  - getCreatures
```
public Creature[] getCreatures()
```
    Get the creatures.
    
    Returns:
    
    The creatures.
  - getObstacles
```
public Obstacle[] getObstacles()
```
    Get the obstacles.
    
    Returns:
    
    The obstacles.
  - getFood
```
public Food[] getFood()
```
    Get the obstacles.
    
    Returns:
    
    The obstacles.
  - getAllObjects
```
public WorldObject[] getAllObjects()
```
    Get all objects in the world (obstacles, food, and creature).
  - createLocation
```
protected Location createLocation(Location loc,
                                  java.lang.String dir)
```
    Create a location.
    
    Parameters:
    
    loc - The location.
    
    dir - The direction.
    
    Returns:
    
    The new location.
  - getEmptyLocation
```
protected Location getEmptyLocation()
```
    Get an empty location.
    
    Returns:
    
    The location.
  - getTaskSize
```
public int getTaskSize()
```
    Return the size of the task list.
    
    Returns:
    
    The task size.
  - getCreature
```
protected Creature getCreature(Creature creature)
```
    Get the internal representation of a creature. If the creature is unknown it gets added to the environment.
    
    Parameters:
    
    creature - The creature.
    
    Returns:
    
    The creature as known in the environment.
  - getNearObjects
```
protected WorldObject[] getNearObjects(Location loc,
                                       int range)
```
    Get objects near a position.
    
    Parameters:
    
    loc - The location.
    
    range - The range.
  - getHighscore
```
public Creature[] getHighscore()
```
    Get the current highscore.
    
    Returns:
    
    The 10 best creatures.
  - saveHighscore
```
public void saveHighscore()
```
    Save the highscore to a file.
  - setSaveInterval
```
public void setSaveInterval(long saveinterval)
```
    Set the highscore save interval (-1 for autosave off).
  - getSaveInterval
```
public long getSaveInterval()
```
    Get the highscore save interval (-1 for autosave off).
  - addPropertyChangeListener
```
public void addPropertyChangeListener(PropertyChangeListener listener)
```
    Add a PropertyChangeListener to the listener list. The listener is registered for all properties.
    
    Parameters:
    
    listener - The PropertyChangeListener to be added.
  - removePropertyChangeListener
```
public void removePropertyChangeListener(PropertyChangeListener listener)
```
    Remove a PropertyChangeListener from the listener list. This removes a PropertyChangeListener that was registered for all properties.
    
    Parameters:
    
    listener - The PropertyChangeListener to be removed.

Class Environment

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

DEFAULT_LEASE_TICKS

instance

creatures

obstacles

food

world

sizex

sizey

monitor

tasklist

pcs

rand

highscore

savetime

saveinterval

foodrate

age

Constructor Detail

Environment

Method Detail

getInstance

moveUp

moveDown

moveLeft

moveRight

eat

addEatTask

addMoveTask

clearTaskList

internalGetVision

getVision

getWidth

getHeight

addFood

removeFood

addObstacle

removeObstacle

addCreature

removeCreature

executeStep

getWorldAge

getFoodrate

setFoodrate

move

getCreatures

getObstacles

getFood

getAllObjects

createLocation

getEmptyLocation

getTaskSize

getCreature

getNearObjects

getHighscore

saveHighscore

setSaveInterval

getSaveInterval

addPropertyChangeListener

removePropertyChangeListener