[OmniFaces utilities (2.0)] Check if a String, Collection, Map or Array is empty

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[OmniFaces utilities] The isEmpty() method returns true if the given value is null or is empty. Types of String, Collection, Map and Array are recognized. If none is recognized, then examine the emptiness of the toString() representation instead.

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Methods:

This method uses the below ones (which can be invoked individually):

Usage:

Testing a String:

String aString = null;

String bString = "";

String cString = "Done!";

import org.omnifaces.util.Utils;

...   

boolean a = Utils.isEmpty(aString);  // true

boolean b = Utils.isEmpty(bString);  // true

boolean c = Utils.isEmpty(cString);  // false

Testing an Object[]:

Object[] aObjectArray = null;

Object[] bObjectArray = new Object[1];

Object[] cObjectArray = {1};

boolean a = Utils.isEmpty(aObjectArray);  // true

boolean b = Utils.isEmpty(bObjectArray);  // false

boolean c = Utils.isEmpty(cObjectArray);  // false

Testing a List:

List aList = null;

List bList = new ArrayList();

List<String> cList = new ArrayList<>();

ArrayList<String> dList = new ArrayList<String>() {

            {

                add("A");

                add("B");

                add("C");

            }

        };

 boolean a = Utils.isEmpty(aList);  // true

 boolean b = Utils.isEmpty(bList);  // true

 boolean c = Utils.isEmpty(cList);  // true

 boolean d = Utils.isEmpty(dList);  // false

Testing a Map:

Map aMap = null;

Map bMap = new HashMap();

Map<String, String> cMap = new HashMap<>();  

Map<Byte, Integer> dMap = new HashMap<Byte, Integer>() {

            {

                put(new Byte("1"), 1);

                put(new Byte("2"), 2);

            };

        };

 boolean a = Utils.isEmpty(aMap);  // true

 boolean b = Utils.isEmpty(bMap);  // true

 boolean c = Utils.isEmpty(cMap);  // true

 boolean d = Utils.isEmpty(dMap);  // false

API GH