Added sting validator to Idevice

src/code/ca/bcit/comp2522/lab03/IDevice.java

@@ -53,6 +53,15 @@ public abstract class IDevice {
         return this.purpose;
     }
 
+    /**
+     * stringValidator checks if the string is within character
+     * bounds and if it is blank, null or empty.
+     * @param toBeValidated passes the string that needs to be validated.
+     * @param maxCharacterCount passes the maximum number of characters that can be accepted
+     *                          as an integer.
+     * @param minCharacterCount passes the minimum number of characters that can be accepted
+     *                          as an integer.
+     * */
     public void stringValidator(String toBeValidated, int minCharacterCount, int maxCharacterCount) {
         if (toBeValidated == null) {
             throw new IllegalArgumentException("Value cannot be null");

src/code/ca/bcit/comp2522/lab03/IPad.java

@@ -11,6 +11,9 @@ package ca.bcit.comp2522.lab03;
  */
 public class IPad extends IDevice {
 
+    private final int MAX_OSVERSION_CHARACTERS = 10;
+    private final int MIN_OSVERSION_CHARACTERS = 1;
+
     private final boolean hasCase;
     private final String OSVersion;
 
@@ -27,6 +30,9 @@ public class IPad extends IDevice {
 
         // TODO: validate String inputs
         this.hasCase = hasCase;
+        stringValidator(OSVersion,
+                        MIN_OSVERSION_CHARACTERS,
+                        MAX_OSVERSION_CHARACTERS);
         this.OSVersion = OSVersion;
     }