org.jmlspecs.models
Class JMLEqualsBagEntry

java.lang.Object
  org.jmlspecs.models.JMLEqualsBagEntry

All Implemented Interfaces:

Cloneable, JMLType, Serializable

class JMLEqualsBagEntry

extends Object

implements JMLType

Internal class used in the implementation of JMLEqualsBag.

Author:

Gary T. Leavens

See Also:

JMLEqualsBag, JMLEqualsBagEntryNode

Class Specifications

public invariant this.count > 0; public invariant this.elementType <: \type(java.lang.Object); public invariant (this.theElem == null ==> this.elementType == \type(java.lang.Object))&&(this.theElem != null ==> this.elementType == \typeof(this.theElem)); public invariant this.owner == null;

Specifications inherited from class Object

represents objectState <- org.jmlspecs.lang.JMLDataGroup.IT; public represents _getClass <- \typeof(this);

Model Field Summary

 

Model fields inherited from class java.lang.Object

_getClass, objectState, theString

 

Ghost Field Summary
Class	elementType           The type of the element in this entry.

 

Ghost fields inherited from class java.lang.Object

objectTimesFinalized, owner

 

Field Summary
int	count           The number of times the element occurs.
Object	theElem           The element in this bag entry.

 

Constructor Summary

JMLEqualsBagEntry(Object e)           Initialize this object to be a singleton entry.

JMLEqualsBagEntry(Object e, int cnt)           Initialize this object to be for the given element with the given number of repetitions.

 

Model Method Summary

 

Model methods inherited from class java.lang.Object

hashValue

 

Method Summary
Object	clone()           Make a clone of the given entry.
boolean	equalElem(Object othElem)           Are these elements equal?
boolean	equals(nullable Object obj)           Test whether this object's value is equal to the given argument.
int	hashCode()           Return a hash code for this object.
JMLEqualsBagEntry	insert(int numInserted)           Return a new bag entry with the same element as this but with the given number of repetitions added to the element's current count.
String	toString()           Return a string representation of this object.

 

Methods inherited from class java.lang.Object

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

 

Ghost Field Detail

elementType

public Class elementType

The type of the element in this entry. This is Object if the element is null.

theElem

public final Object theElem

The element in this bag entry.

count

public final int count

The number of times the element occurs.

JMLEqualsBagEntry

public JMLEqualsBagEntry(Object e)

Initialize this object to be a singleton entry.

Specifications: (class)pure

public normal_behavior
assignable theElem, count, elementType, owner;
ensures this.theElem == e&&this.count == 1;

JMLEqualsBagEntry

public JMLEqualsBagEntry(Object e,
                         int cnt)

Initialize this object to be for the given element with the given number of repetitions.

Specifications: (class)pure

public normal_behavior
requires cnt > 0;
assignable theElem, count, elementType, owner;
ensures this.count == cnt&&(e == null ==> this.theElem == null);
ensures (e != null ==> e.equals(this.theElem));

clone

public Object clone()

Make a clone of the given entry.

Specified by:

clone in interface JMLType

Overrides:

clone in class Object

Specifications: non_null (class)pure

Specifications inherited from overridden method in class Object:
       non_null

protected normal_behavior
requires this instanceof java.lang.Cloneable;
assignable \nothing;
ensures \result != null;
ensures \typeof(\result ) == \typeof(this);
ensures (* \result is a clone of this *);

     also

protected normal_behavior
requires this.getClass().isArray();
assignable \nothing;
ensures \elemtype(\typeof(\result )) == \elemtype(\typeof(this));
ensures ((java.lang.Object[])\result ).length == ((java.lang.Object[])this).length;
ensures ( \forall int i; 0 <= i&&i < ((java.lang.Object[])this).length; ((java.lang.Object[])\result )[i] == ((java.lang.Object[])this)[i]);

     also

requires this.getClass().isArray();
assignable \nothing;
ensures \elemtype(\typeof(\result )) == \elemtype(\typeof(this));
ensures java.lang.reflect.Array.getLength(\result ) == java.lang.reflect.Array.getLength(this);
ensures ( \forall int i; 0 <= i&&i < java.lang.reflect.Array.getLength(this); ( \exists java.lang.Object result_i; result_i == java.lang.reflect.Array.get(\result ,i); (result_i == null&&java.lang.reflect.Array.get(this,i) == null)||(result_i != null&&result_i.equals(java.lang.reflect.Array.get(this,i)))));

     also

protected exceptional_behavior
requires !(this instanceof java.lang.Cloneable);
assignable \nothing;
signals_only java.lang.CloneNotSupportedException;

     also

protected normal_behavior
requires \elemtype(\typeof(this)) <: \type(java.lang.Object);
assignable \nothing;
ensures \elemtype(\typeof(\result )) == \elemtype(\typeof(this));
ensures ((java.lang.Object[])\result ).length == ((java.lang.Object[])this).length;
ensures ( \forall int i; 0 <= i&&i < ((java.lang.Object[])this).length; ((java.lang.Object[])\result )[i] == ((java.lang.Object[])this)[i]);

     also

protected normal_behavior
requires \elemtype(\typeof(this)) == \type(int);
assignable \nothing;
ensures \elemtype(\typeof(\result )) == \elemtype(\typeof(this));
ensures ((int[])\result ).length == ((int[])this).length;
ensures ( \forall int i; 0 <= i&&i < ((int[])this).length; ((int[])\result )[i] == ((int[])this)[i]);

     also

protected normal_behavior
requires \elemtype(\typeof(this)) == \type(byte);
assignable \nothing;
ensures \elemtype(\typeof(\result )) == \elemtype(\typeof(this));
ensures ((byte[])\result ).length == ((byte[])this).length;
ensures ( \forall int i; 0 <= i&&i < ((byte[])this).length; ((byte[])\result )[i] == ((byte[])this)[i]);

     also

protected normal_behavior
requires \elemtype(\typeof(this)) == \type(char);
assignable \nothing;
ensures \elemtype(\typeof(\result )) == \elemtype(\typeof(this));
ensures ((char[])\result ).length == ((char[])this).length;
ensures ( \forall int i; 0 <= i&&i < ((char[])this).length; ((char[])\result )[i] == ((char[])this)[i]);

     also

protected normal_behavior
requires \elemtype(\typeof(this)) == \type(long);
assignable \nothing;
ensures \elemtype(\typeof(\result )) == \elemtype(\typeof(this));
ensures ((long[])\result ).length == ((long[])this).length;
ensures ( \forall int i; 0 <= i&&i < ((long[])this).length; ((long[])\result )[i] == ((long[])this)[i]);

     also

protected normal_behavior
requires \elemtype(\typeof(this)) == \type(short);
assignable \nothing;
ensures \elemtype(\typeof(\result )) == \elemtype(\typeof(this));
ensures ((short[])\result ).length == ((short[])this).length;
ensures ( \forall int i; 0 <= i&&i < ((short[])this).length; ((short[])\result )[i] == ((short[])this)[i]);

     also

protected normal_behavior
requires \elemtype(\typeof(this)) == \type(boolean);
assignable \nothing;
ensures \elemtype(\typeof(\result )) == \elemtype(\typeof(this));
ensures ((boolean[])\result ).length == ((boolean[])this).length;
ensures ( \forall int i; 0 <= i&&i < ((boolean[])this).length; ((boolean[])\result )[i] == ((boolean[])this)[i]);

     also

protected normal_behavior
requires \elemtype(\typeof(this)) == \type(float);
assignable \nothing;
ensures \elemtype(\typeof(\result )) == \elemtype(\typeof(this));
ensures ((float[])\result ).length == ((float[])this).length;
ensures ( \forall int i; 0 <= i&&i < ((float[])this).length; (java.lang.Float.isNaN(((float[])\result )[i])&&java.lang.Float.isNaN(((float[])this)[i]))||((float[])\result )[i] == ((float[])this)[i]);

     also

protected normal_behavior
requires \elemtype(\typeof(this)) == \type(double);
assignable \nothing;
ensures \elemtype(\typeof(\result )) == \elemtype(\typeof(this));
ensures ((double[])\result ).length == ((double[])this).length;
ensures ( \forall int i; 0 <= i&&i < ((double[])this).length; (java.lang.Double.isNaN(((double[])\result )[i])&&java.lang.Double.isNaN(((double[])this)[i]))||((double[])\result )[i] == ((double[])this)[i]);

Specifications inherited from overridden method in interface JMLType:
       pure

     also

public normal_behavior
ensures \result != null;
ensures \result instanceof org.jmlspecs.models.JMLType;
ensures ((org.jmlspecs.models.JMLType)\result ).equals(this);

    implies_that

ensures \result != null&&\typeof(\result ) <: \type(org.jmlspecs.models.JMLType);

equalElem

public boolean equalElem(Object othElem)

Are these elements equal?

Specifications: (class)pure

public normal_behavior
ensures \result <==> (othElem == null&&this.theElem == null)||(othElem != null&&othElem.equals(this.theElem));

equals

public boolean equals(nullable Object obj)

Test whether this object's value is equal to the given argument.

Specified by:

equals in interface JMLType

Overrides:

equals in class Object

Specifications: (class)pure

Specifications inherited from overridden method equals(Object obj) in class Object:
       pure

public normal_behavior
requires obj != null;
ensures (* \result is true when obj is "equal to" this object *);

     also

public normal_behavior
requires this == obj;
ensures \result ;

     also

public code normal_behavior
requires obj != null;
ensures \result <==> this == obj;

     also

diverges false;
ensures obj == null ==> !\result ;

Specifications inherited from overridden method equals(Object ob2) in interface JMLType:
       pure

     also

public normal_behavior
ensures \result ==> ob2 != null&&(* ob2 is not distinguishable from this, except by using mutation or == *);

    implies_that

public normal_behavior

{|

requires ob2 != null&&ob2 instanceof org.jmlspecs.models.JMLType;
ensures ((org.jmlspecs.models.JMLType)ob2).equals(this) == \result ;

also

requires ob2 == this;
ensures \result <==> true;

|}

hashCode

public int hashCode()

Return a hash code for this object.

Specified by:

hashCode in interface JMLType

Overrides:

hashCode in class Object

Specifications: (class)pure

Specifications inherited from overridden method in class Object:

public behavior
assignable objectState;
ensures (* \result is a hash code for this object *);

     also

public code normal_behavior
assignable \nothing;

Specifications inherited from overridden method in interface JMLType:
       pure

insert

public JMLEqualsBagEntry insert(int numInserted)

Return a new bag entry with the same element as this but with the given number of repetitions added to the element's current count.

Specifications: (class)pure

public normal_behavior
requires numInserted > 0;
ensures \result != null&&\result .count == this.count+numInserted;
ensures \result != null&&\result .theElem.equals(this.theElem);

toString

public String toString()

Return a string representation of this object.

Overrides:

toString in class Object

Specifications: non_null (class)pure

Specifications inherited from overridden method in class Object:
       non_null

public normal_behavior
assignable objectState;
ensures \result != null&&\result .equals(this.theString);
ensures (* \result is a string representation of this object *);

     also

public code normal_behavior
assignable \nothing;
ensures \result != null&&(* \result is the instance's class name, followed by an @, followed by the instance's hashcode in hex *);

     also

public code model_program { ... }

    implies_that

assignable objectState;
ensures \result != null;