[W7][T11-2] Teo Xuan Wei

docs/UserGuide.adoc

@@ -49,6 +49,11 @@ Examples:
 * `add John Doe p/98765432 e/[email protected] a/John street, block 123, #01-01`
 * `add Betsy Crowe pp/1234567 e/[email protected] pa/Newgate Prison t/criminal t/friend`
 
+== Finding out the current length of the address book : `length`
+
+Shows the number of entries in the address book. +
+Format: `length`
+
 == Listing all persons : `list`
 
 Shows a list of all persons in the address book. +

src/seedu/addressbook/Main.java

@@ -12,7 +12,7 @@
  * Main entry point to the application.
  */
 public class Main extends Application implements Stoppable{
-
+    // test commit
     /** Version info of the program. */
     public static final String VERSION = "AddressBook Level 3 - Version 1.0";
 

src/seedu/addressbook/commands/HelpCommand.java

@@ -15,6 +15,7 @@ public class HelpCommand extends Command {
             + "\n" + DeleteCommand.MESSAGE_USAGE
             + "\n" + ClearCommand.MESSAGE_USAGE
             + "\n" + FindCommand.MESSAGE_USAGE
+            + "\n" + LengthCommand.MESSAGE_USAGE
             + "\n" + ListCommand.MESSAGE_USAGE
             + "\n" + ViewCommand.MESSAGE_USAGE
             + "\n" + ViewAllCommand.MESSAGE_USAGE

src/seedu/addressbook/commands/LengthCommand.java

@@ -0,0 +1,13 @@
+package seedu.addressbook.commands;
+
+public class LengthCommand extends Command {
+    public static final String COMMAND_WORD = "length";
+    public static final String MESSAGE_USAGE = COMMAND_WORD + ":\n" + "Returns the current length of the address book at the point of query.\n\t"
+            + "Example: " + COMMAND_WORD;
+    public static final String MESSAGE_SUCCESS = "Length of the address book is: ";
+
+    @Override
+    public CommandResult execute() {
+        return new CommandResult(MESSAGE_SUCCESS + addressBook.size());
+    }
+}

src/seedu/addressbook/data/AddressBook.java

@@ -65,6 +65,10 @@ public void clear() {
         allPersons.clear();
     }
 
+    public int size() {
+        return allPersons.size();
+    }
+
     /**
      * Defensively copied UniquePersonList of all persons in the address book at the time of the call.
      */
@@ -83,4 +87,4 @@ public boolean equals(Object other) {
     public int hashCode() {
         return allPersons.hashCode();
     }
-}
+}

src/seedu/addressbook/data/person/UniquePersonList.java

@@ -113,6 +113,14 @@ public void clear() {
         internalList.clear();
     }
 
+    /**
+     * New method to get size of address book :D
+     * Returns the number of persons in the list.
+     */
+    public int size() {
+       return internalList.size();
+    }
+
     @Override
     public Iterator<Person> iterator() {
         return internalList.iterator();

src/seedu/addressbook/parser/Parser.java

@@ -69,6 +69,9 @@ public Command parseCommand(String userInput) {
             case FindCommand.COMMAND_WORD:
                 return prepareFind(arguments);
 
+            case LengthCommand.COMMAND_WORD:
+                return new LengthCommand();
+
             case ListCommand.COMMAND_WORD:
                 return new ListCommand();