ca.uqac.lif.ecp.util

Class TypeHelper

java.lang.Object

ca.uqac.lif.ecp.util.TypeHelper

public class TypeHelper
extends java.lang.Object

Provides utility methods to manipulate objects of various types

Author:

Sylvain Hallé

Method Summary

Modifier and Type	Method and Description
static double	castToDouble(java.lang.Object o) Attempts to create a double number out of an object.
static int	castToInteger(java.lang.Object o) Attempts to create an int number out of an object.
static boolean	valueEquals(java.lang.Object o1, java.lang.Object o2) Compares two objects based on their values.

Methods inherited from class java.lang.Object

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

Method Detail

valueEquals

public static boolean valueEquals(java.lang.Object o1,
                                  java.lang.Object o2)

Compares two objects based on their values. The method uses the following rules:

1. Two nulls are equal
2. If o1 and o2 are both strings, they are equal if their text is equal
3. If o1 and o2 are both numbers, they are equal if their conversion into a double returns the same value
4. Otherwise, the default equals() method is invoked

Parameters:

o1 - The first object

o2 - The second object

Returns:

true or false according to the rules mentioned above

castToDouble

public static double castToDouble(java.lang.Object o)

Attempts to create a double number out of an object.

• If o is a Number, it returns o.doubleValue()
• If o is a String, it is parsed as a double; 0 is returned if the parsing fails
• If o is anything else, 0 is returned

Parameters:

o - The object

Returns:

A number, created according to the rules above

castToInteger

public static int castToInteger(java.lang.Object o)

Attempts to create an int number out of an object.

• If o is a Number, it returns o.intValue()
• If o is a String, it is parsed as an int; 0 is returned if the parsing fails
• If o is anything else, 0 is returned

Parameters:

o - The object

Returns:

A number, created according to the rules above