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Java/DataStructures/Heaps/HeapElement.java at master · Drew7/Java · GitHub
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HeapElement.java
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Heaps
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HeapElement.java
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package
DataStructures
.
Heaps
;
import
java
.
lang
.
Double
;
import
java
.
lang
.
Object
;
/**
* Class for heap elements.<br>
* <p>A heap element contains two attributes: a key which will be used to build the tree (int
* or double, either primitive type or object) and any kind of IMMUTABLE object the user sees fit
* to carry any information he/she likes. Be aware that the use of a mutable object might
* jeopardize the integrity of this information. </p>
*
* @author Nicolas Renard
*/
public
class
HeapElement
{
private
final
double
key
;
private
final
Object
additionalInfo
;
// Constructors
/**
* @param key : a number of primitive type 'double'
* @param info : any kind of IMMUTABLE object. May be null, since the purpose is only to carry
* additional information of use for the user
*/
public
HeapElement
(
double
key
,
Object
info
) {
this
.
key
=
key
;
this
.
additionalInfo
=
info
;
}
/**
* @param key : a number of primitive type 'int'
* @param info : any kind of IMMUTABLE object. May be null, since the purpose is only to carry
* additional information of use for the user
*/
public
HeapElement
(
int
key
,
Object
info
) {
this
.
key
=
key
;
this
.
additionalInfo
=
info
;
}
/**
* @param key : a number of object type 'Integer'
* @param info : any kind of IMMUTABLE object. May be null, since the purpose is only to carry
* additional information of use for the user
*/
public
HeapElement
(
Integer
key
,
Object
info
) {
this
.
key
=
key
;
this
.
additionalInfo
=
info
;
}
/**
* @param key : a number of object type 'Double'
* @param info : any kind of IMMUTABLE object. May be null, since the purpose is only to carry
* additional information of use for the user
*/
public
HeapElement
(
Double
key
,
Object
info
) {
this
.
key
=
key
;
this
.
additionalInfo
=
info
;
}
/**
* @param key : a number of primitive type 'double'
*/
public
HeapElement
(
double
key
) {
this
.
key
=
key
;
this
.
additionalInfo
=
null
;
}
/**
* @param key : a number of primitive type 'int'
*/
public
HeapElement
(
int
key
) {
this
.
key
=
key
;
this
.
additionalInfo
=
null
;
}
/**
* @param key : a number of object type 'Integer'
*/
public
HeapElement
(
Integer
key
) {
this
.
key
=
key
;
this
.
additionalInfo
=
null
;
}
/**
* @param key : a number of object type 'Double'
*/
public
HeapElement
(
Double
key
) {
this
.
key
=
key
;
this
.
additionalInfo
=
null
;
}
// Getters
/**
* @return the object containing the additional info provided by the user.
*/
public
Object
getInfo
() {
return
additionalInfo
;
}
/**
* @return the key value of the element
*/
public
double
getKey
() {
return
key
;
}
// Overridden object methods
public
String
toString
() {
return
"Key: "
+
key
+
" - "
+
additionalInfo
.
toString
();
}
/**
* @param otherHeapElement
* @return true if the keys on both elements are identical and the additional info objects
* are identical.
*/
public
boolean
equals
(
HeapElement
otherHeapElement
) {
return
(
this
.
key
==
otherHeapElement
.
key
) && (
this
.
additionalInfo
.
equals
(
otherHeapElement
.
additionalInfo
));
}
}
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