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edu.ucsb.ccs.jaqual.standard
Class Equal  

java.lang.Object
  edu.ucsb.ccs.jaqual.standard.Equal

All Implemented Interfaces:

edu.ucsb.ccs.jaqual.Assertion

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public class Equal

extends java.lang.Object

implements edu.ucsb.ccs.jaqual.Assertion

An assertion to test for equality. Supports comparison by reference and value, and comparison of floating point numbers.

Example use:

   Exists.in(elements).suchThat(new Equal(5));
 

Version:

$Id: Equal.java,v 1.3 2002/07/13 09:06:30 parkera Exp $

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Field Summary
static int	CONTENT           Constant for comparison by value.
protected  int	mode           The comparison mode, either CONTENT or REFERENCE.
static int	REFERENCE           Constant for comparison by reference.
protected  double	tolerance           The tolerance to use when comparing floating point numbers.
protected  java.lang.Object	value           The value to compare things with.

 

Constructor Summary

Equal(byte value)           Create an assertion to compare bytes.

Equal(char value)           Create an assertion to compare characters.

Equal(double value)           Create an assertion to compare double precision numbers, using Double.MIN_VALUE as the tolerance.

Equal(double value, double tolerance)           Create an assertion to compare double precision numbers.

Equal(float value)           Create an assertion to compare floating point numbers, using Float.MIN_VALUE as the tolerance.

Equal(float value, double tolerance)           Create an assertion to compare floating point numbers.

Equal(int value)           Create an assertion to compare integers.

Equal(long value)           Create an assertion to compare longs.

Equal(java.lang.Object value)           Create an assertion to compare Objects by content.

Equal(java.lang.Object value, int mode)           Create an assertion to compare Objects.

Equal(short value)           Create an assertion to compare shorts.

 

Method Summary
protected  boolean	_Invariant()
protected  int	compare(double val1, double val2)           Compare two floating point numbers.
boolean	eval(java.lang.Object o)           Test an object to see if it is equal to the target value.

 

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Field Detail

CONTENT

public static final int CONTENT

Constant for comparison by value. In this mode, objects are compared by their value (a.equals(b)), rather than by reference (a == b).

See Also:

Constant Field Values

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REFERENCE

public static final int REFERENCE

Constant for comparison by reference. In this mode, objects are compared by location in memory (a == b), rather than by value (a.equals(b)).

See Also:

Constant Field Values

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value

protected java.lang.Object value

The value to compare things with.

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mode

protected int mode

The comparison mode, either CONTENT or REFERENCE.

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tolerance

protected double tolerance

The tolerance to use when comparing floating point numbers.

Constructor Detail

Equal

public Equal(java.lang.Object value)

Create an assertion to compare Objects by content.

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Equal

public Equal(java.lang.Object value,
             int mode)

Create an assertion to compare Objects.

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Equal

public Equal(int value)

Create an assertion to compare integers.

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Equal

public Equal(long value)

Create an assertion to compare longs.

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Equal

public Equal(short value)

Create an assertion to compare shorts.

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Equal

public Equal(byte value)

Create an assertion to compare bytes.

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Equal

public Equal(char value)

Create an assertion to compare characters.

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Equal

public Equal(float value)

Create an assertion to compare floating point numbers, using Float.MIN_VALUE as the tolerance.

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Equal

public Equal(float value,
             double tolerance)

Create an assertion to compare floating point numbers.

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Equal

public Equal(double value)

Create an assertion to compare double precision numbers, using Double.MIN_VALUE as the tolerance.

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Equal

public Equal(double value,
             double tolerance)

Create an assertion to compare double precision numbers.

Method Detail

eval

public boolean eval(java.lang.Object o)

Test an object to see if it is equal to the target value.

Specified by:

eval in interface edu.ucsb.ccs.jaqual.Assertion

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compare

protected int compare(double val1,
                      double val2)

Compare two floating point numbers.

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_Invariant

protected boolean _Invariant()

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