Package org.biojava.nbio.core.util

Class Equals

java.lang.Object

org.biojava.nbio.core.util.Equals

public class Equals
extends Object

A set of helper methods which return true if the two parameters are equal to each other.

Author:

ayates

See Also:

For how to use this class

Constructor Summary

Constructors

Constructor	Description
Equals()

Method Summary

Modifier and Type	Method	Description
static boolean	classEqual(Object one, Object two)	This method should be called before beginning any equals methods.
static boolean	equal(boolean one, boolean two)
static boolean	equal(int one, int two)
static boolean	equal(long one, long two)
static boolean	equal(Object one, Object two)	Does not compare class types.

Methods inherited from class java.lang.Object

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

Constructor Detail

Equals

public Equals()

Method Detail

equal

public static boolean equal(int one,
                            int two)

equal

public static boolean equal(long one,
                            long two)

equal

public static boolean equal(boolean one,
                            boolean two)

equal

public static boolean equal(Object one,
                            Object two)

Does not compare class types. However, if the two arguments are non-null references to distinct objects, the object's equals() method is called - which may well compare class types.

See Also:

classEqual(Object, Object)

classEqual

public static boolean classEqual(Object one,
                                 Object two)

This method should be called before beginning any equals methods. In order to return true the method:

1. The two given objects are the same instance using ==. This also means if both Objects are null then this method will return true (well technically they are equal)
2. Tests that neither object is null
3. The the two classes from the objects are equal using ==

The boilerplate using this method then becomes:

 boolean equals = false;
 if (EqualsHelper.classEqual(this, obj)) {
   TargetClass casted = (TargetClass) obj;
   equals = (EqualsHelper.equal(this.getId(), casted.getId()) && EqualsHelper
       .equal(this.getName(), casted.getName()));
 }
 return equals;
 

Parameters:

one - The first object to test

two - The second object to test

Returns:

A boolean indicating if these two objects are equal at the class level