jade.content.abs

Class AbsObjectImpl

java.lang.Object

jade.content.abs.AbsObjectImpl

All Implemented Interfaces:

AbsObject, Serializable

Direct Known Subclasses:

AbsIRE, AbsPrimitiveSlotsHolder, AbsVariable

public class AbsObjectImpl
extends Object
implements AbsObject

Base class for all non-primitive abstract descriptor classes. This class is not intended to be used by programmers.

Author:

Federico Bergenti - Universita` di Parma, Giovanni Caire - TILAB

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
private boolean	changed true if this object is changed and its hash must be recomputed
private HashMap	elements
private int	hashCode
private ArrayList	orderedKeys This list keeps the keys in the same order as they were added
private String	typeName

Fields inherited from interface jade.content.abs.AbsObject

ABS_AGENT_ACTION, ABS_AGGREGATE, ABS_CONCEPT, ABS_CONCEPT_SLOT_FUNCTION, ABS_CONTENT_ELEMENT_LIST, ABS_IRE, ABS_PREDICATE, ABS_PRIMITIVE, ABS_VARIABLE, UNKNOWN

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbsObjectImpl(String typeName) Construct an Abstract descriptor to hold an object of the proper type.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object obj) Returns true if the attribute is equal to this abstract descriptor, based on the contents of both descriptors.
private int	f(AbsObjectImpl o)
private int	f(AbsObjectImpl o, int x) Calculates the hashcode according to a formula based on the slot names and values taken in an lexicographical order
AbsObject	getAbsObject(String name) Gets the value of an attribute of the object held by this abstract descriptor.
int	getAbsType()
int	getCount() Gets the number of attributes.
String[]	getNames()
String	getTypeName()
int	hashCode() Returns an integer hashcode calculated from the contents of this abstract descriptor
boolean	isGrounded() Tests if the object is grounded, i.e., if no one of its attributes is associated with a variable
protected void	set(String name, AbsObject value) Sets an attribute of the object held by this abstract descriptor.
private void	sort(String[] strs)
private void	swap(String[] strs, int x, int y)
String	toString() This method is here just for debugging.

Methods inherited from class java.lang.Object

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

Field Detail

elements

private HashMap elements

orderedKeys

private ArrayList orderedKeys

This list keeps the keys in the same order as they were added

typeName

private String typeName

changed

private boolean changed

true if this object is changed and its hash must be recomputed

hashCode

private int hashCode

Constructor Detail

AbsObjectImpl

protected AbsObjectImpl(String typeName)

Construct an Abstract descriptor to hold an object of the proper type.

Parameters:

typeName - The name of the type of the object held by this abstract descriptor.

Method Detail

getTypeName

public String getTypeName()

Specified by:

getTypeName in interface AbsObject

Returns:

The name of the type of the object held by this abstract descriptor.

See Also:

AbsObject.getTypeName()

set

protected void set(String name,
                   AbsObject value)

Sets an attribute of the object held by this abstract descriptor.

Parameters:

name - The name of the attribute to be set.

value - The new value of the attribute. If value is null the current mapping with name (if any) is removed.

getAbsObject

public AbsObject getAbsObject(String name)

Gets the value of an attribute of the object held by this abstract descriptor.

Specified by:

getAbsObject in interface AbsObject

Parameters:

name - The name of the attribute.

Returns:

value The value of the attribute.

See Also:

AbsObject.getAbsObject(String)

getNames

public String[] getNames()

Specified by:

getNames in interface AbsObject

Returns:

the name of all attributes.

See Also:

AbsObject.getNames()

isGrounded

public boolean isGrounded()

Tests if the object is grounded, i.e., if no one of its attributes is associated with a variable

Specified by:

isGrounded in interface AbsObject

Returns:

true if the object is grounded.

See Also:

AbsObject.isGrounded()

getCount

public int getCount()

Gets the number of attributes.

Specified by:

getCount in interface AbsObject

Returns:

the number of attributes.

See Also:

AbsObject.getCount()

toString

public String toString()

This method is here just for debugging. Notice that it is highly innefficient. The method StringCodec.encode() should be used instead.

Overrides:

toString in class Object

See Also:

StringCodec.encode(AbsContentElement content)

equals

public boolean equals(Object obj)

Returns true if the attribute is equal to this abstract descriptor, based on the contents of both descriptors.

Overrides:

equals in class Object

hashCode

public int hashCode()

Returns an integer hashcode calculated from the contents of this abstract descriptor

Overrides:

hashCode in class Object

f

private final int f(AbsObjectImpl o,
                    int x)

Calculates the hashcode according to a formula based on the slot names and values taken in an lexicographical order

f

private final int f(AbsObjectImpl o)

sort

private final void sort(String[] strs)

swap

private final void swap(String[] strs,
                        int x,
                        int y)

getAbsType

public int getAbsType()

Specified by:

getAbsType in interface AbsObject