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cgsuite.basics
Class DomineeringPosition  

java.lang.Object
  cgsuite.AbstractShortGame
      cgsuite.basics.DomineeringPosition

All Implemented Interfaces:

cgsuite.Game, java.io.Serializable

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public class DomineeringPosition

extends cgsuite.AbstractShortGame

A position in the game Domineering.

Version:

$Revision: 1.8 $ $Date: 2003/10/14 05:30:39 $

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Field Summary
private  cgsuite.util.Grid	grid
static int	SQUARE_BLOCKED
static int	SQUARE_EMPTY

 

Fields inherited from class cgsuite.AbstractShortGame

 

Fields inherited from interface cgsuite.Game

SIMPLIFY_COOL, SIMPLIFY_FREEZE, SIMPLIFY_HEAT, SIMPLIFY_ORDINAL_SUM_G, SIMPLIFY_ORDINAL_SUM_H, SIMPLIFY_OVERHEAT, SIMPLIFY_PRODUCT_G, SIMPLIFY_PRODUCT_U, SIMPLIFY_SUM

 

Constructor Summary
private	DomineeringPosition()
	DomineeringPosition(cgsuite.util.Grid grid)
	DomineeringPosition(java.lang.String[] strings)

 

Method Summary
private  cgsuite.CanonicalGame	baseCanonicalize()
cgsuite.CanonicalGame	canonicalize()           Calculates the canonical form of this short game.
boolean	equals(java.lang.Object o)           Determine whether this Object is semantically equal to another Object.
cgsuite.util.Grid	getGrid()
cgsuite.Game	getInverse()           Gets the inverse of this game.
java.util.Collection	getLeftOptions()           Gets a Collection containing all left options of this game.
java.util.Collection	getRightOptions()           Gets a Collection containing all right options of this game.
int	hashCode()           Get a value that represents this Object, as uniquely as possible within the confines of an int.
java.lang.String	toString()           Convert this Object to a human-readable String.

 

Methods inherited from class cgsuite.AbstractShortGame

isShortGame, simplify, simplifyExpression

 

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

 

Field Detail

SQUARE_EMPTY

public static final int SQUARE_EMPTY

See Also:

Constant Field Values

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SQUARE_BLOCKED

public static final int SQUARE_BLOCKED

See Also:

Constant Field Values

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grid

private cgsuite.util.Grid grid

Constructor Detail

DomineeringPosition

private DomineeringPosition()

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DomineeringPosition

public DomineeringPosition(cgsuite.util.Grid grid)

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DomineeringPosition

public DomineeringPosition(java.lang.String[] strings)
                    throws cgsuite.plugin.MethodInvocationException

Method Detail

getGrid

public cgsuite.util.Grid getGrid()

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equals

public boolean equals(java.lang.Object o)

Description copied from class: java.lang.Object

Determine whether this Object is semantically equal to another Object.

There are some fairly strict requirements on this method which subclasses must follow:

• It must be transitive. If a.equals(b) and b.equals(c), then a.equals(c) must be true as well.
• It must be symmetric. a.equals(b) and b.equals(a) must have the same value.
• It must be reflexive. a.equals(a) must always be true.
• It must be consistent. Whichever value a.equals(b) returns on the first invocation must be the value returned on all later invocations.
• a.equals(null) must be false.
• It must be consistent with hashCode(). That is, a.equals(b) must imply a.hashCode() == b.hashCode(). The reverse is not true; two objects that are not equal may have the same hashcode, but that has the potential to harm hashing performance.

This is typically overridden to throw a java.lang.ClassCastException if the argument is not comparable to the class performing the comparison, but that is not a requirement. It is legal for a.equals(b) to be true even though a.getClass() != b.getClass(). Also, it is typical to never cause a java.lang.NullPointerException.

In general, the Collections API (java.util) use the equals method rather than the == operator to compare objects. However, java.util.IdentityHashMap is an exception to this rule, for its own good reasons.

The default implementation returns this == o.

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hashCode

public int hashCode()

Description copied from class: java.lang.Object

Get a value that represents this Object, as uniquely as possible within the confines of an int.

There are some requirements on this method which subclasses must follow:

• Semantic equality implies identical hashcodes. In other words, if a.equals(b) is true, then a.hashCode() == b.hashCode() must be as well. However, the reverse is not necessarily true, and two objects may have the same hashcode without being equal.
• It must be consistent. Whichever value o.hashCode() returns on the first invocation must be the value returned on all later invocations as long as the object exists. Notice, however, that the result of hashCode may change between separate executions of a Virtual Machine, because it is not invoked on the same object.

Notice that since hashCode is used in java.util.Hashtable and other hashing classes, a poor implementation will degrade the performance of hashing (so don't blindly implement it as returning a constant!). Also, if calculating the hash is time-consuming, a class may consider caching the results.

The default implementation returns System.identityHashCode(this)

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toString

public java.lang.String toString()

Description copied from class: java.lang.Object

Convert this Object to a human-readable String. There are no limits placed on how long this String should be or what it should contain. We suggest you make it as intuitive as possible to be able to place it into System.out.println() 55 and such.

It is typical, but not required, to ensure that this method never completes abruptly with a java.lang.RuntimeException.

This method will be called when performing string concatenation with this object. If the result is null, string concatenation will instead use "null".

The default implementation returns getClass().getName() + "@" + Integer.toHexString(hashCode()).

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getInverse

public cgsuite.Game getInverse()

Description copied from interface: cgsuite.Game

Gets the inverse of this game.

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getLeftOptions

public java.util.Collection getLeftOptions()

Description copied from interface: cgsuite.Game

Gets a Collection containing all left options of this game.

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getRightOptions

public java.util.Collection getRightOptions()

Description copied from interface: cgsuite.Game

Gets a Collection containing all right options of this game.

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canonicalize

public cgsuite.CanonicalGame canonicalize()

Description copied from class: cgsuite.AbstractShortGame

Calculates the canonical form of this short game.

This default implementation of canonicalize proceeds essentially by brute force: It canonicalizes all left and right options and assembles the results into a single cgsuite.CanonicalGame. Subclasses of AbstractShortGame should override this method when a more efficient canonicalization algorithm is available. It is permissible for subclasses to call super.canonicalize() to fall back on the default algorithm.

AbstractShortGame stores all its results in the primary cache (see the cgsuite.Context class for details) to speed calculations.

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baseCanonicalize

private cgsuite.CanonicalGame baseCanonicalize()

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