[Facade] Added pattern examples, bank and computer

src/facade/examples/bank/AccountNumberCheck.java

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+package facade.examples.bank;
+
+/**
+ * Created by luisburgos on 12/08/15.
+ */
+public class AccountNumberCheck {
+
+    private int accountNumber = 1234567890;
+
+    public int getAccountNumber() { return accountNumber; }
+
+    public boolean isAccountActive(int accountNumberToCheck){
+        if(accountNumberToCheck == getAccountNumber()) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+}

src/facade/examples/bank/BankFacade.java

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+package facade.examples.bank;
+
+/**
+ * Created by luisburgos on 12/08/15.
+ */
+public class BankFacade {
+
+    private int accountNumber;
+    private int securityCode;
+
+    private AccountNumberCheck accountChecker;
+    private SecurityCodeCheck codeChecker;
+    private FundsCheck fundsChecker;
+
+    private WelcomeMessage bankWelcome;
+
+    public BankFacade(int accountNumber, int securityCode){
+
+        this.accountNumber = accountNumber;
+        this.securityCode  = securityCode;
+
+        bankWelcome    = new WelcomeMessage();
+        accountChecker = new AccountNumberCheck();
+        codeChecker    = new SecurityCodeCheck();
+        fundsChecker   = new FundsCheck();
+
+    }
+
+    private int getAccountNumber() { return accountNumber; }
+
+    private int getSecurityCode() { return securityCode; }
+
+    public void withdrawCash(double cashAmount){
+
+        if(canWithdraw(cashAmount)) {
+            System.out.println("Transaction Complete\n");
+        } else {
+            System.out.println("Transaction Failed\n");
+        }
+
+    }
+
+
+    public void depositCash(double cashAmount){
+        if(canDeposit(cashAmount)) {
+            fundsChecker.makeDeposit(cashAmount);
+            System.out.println("Transaction Complete\n");
+        } else {
+            System.out.println("Transaction Failed\n");
+        }
+    }
+
+    private boolean canWithdraw(double cashAmount){
+        return accountChecker.isAccountActive(getAccountNumber()) &&
+                codeChecker.isCodeCorrect(getSecurityCode()) &&
+                fundsChecker.haveEnoughMoney(cashAmount);
+    }
+
+    private boolean canDeposit(double cashAmount){
+        return accountChecker.isAccountActive(getAccountNumber()) &&
+                codeChecker.isCodeCorrect(getSecurityCode());
+    }
+
+}

src/facade/examples/bank/Client.java

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+package facade.examples.bank;
+
+/**
+ * Created by luisburgos on 12/08/15.
+ */
+public class Client {
+
+    public static void main(String[] args) {
+
+        BankFacade accesingBank = new BankFacade(1234567890, 1234);
+
+        accesingBank.withdrawCash(50.00);
+        accesingBank.withdrawCash(900.00);
+        accesingBank.depositCash(200.00);
+
+        accesingBank.withdrawCash(900.00);
+
+    }
+}

src/facade/examples/bank/FundsCheck.java

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+package facade.examples.bank;
+
+/**
+ * Created by luisburgos on 12/08/15.
+ */
+public class FundsCheck {
+
+    private double cashInAccount = 1000.00;
+
+    public double getCashInAccount() { return cashInAccount; }
+
+    public void decreaseCashInAccount(double cashWithdrawn) { cashInAccount -= cashWithdrawn; }
+
+    public void increaseCashInAccount(double cashDeposited) { cashInAccount += cashDeposited; }
+
+    public boolean haveEnoughMoney(double cashToWithdrawal) {
+
+        if(cashToWithdrawal > getCashInAccount()) {
+            System.out.println("Error: You don't have enough money");
+            System.out.println("Current Balance: " + getCashInAccount());
+            return false;
+        } else {
+            decreaseCashInAccount(cashToWithdrawal);
+            System.out.println("Withdrawal Complete: Current Balance is " + getCashInAccount());
+            return true;
+        }
+
+    }
+
+    public void makeDeposit(double cashToDeposit) {
+        increaseCashInAccount(cashToDeposit);
+        System.out.println("Deposit Complete: Current Balance is " + getCashInAccount());
+
+    }
+
+}

src/facade/examples/bank/SecurityCodeCheck.java

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+package facade.examples.bank;
+
+/**
+ * Created by luisburgos on 12/08/15.
+ */
+public class SecurityCodeCheck {
+
+    private int securityCode = 1234;
+
+    public int getSecurityCode() { return securityCode; }
+
+    public boolean isCodeCorrect(int securityCode){
+
+        if(securityCode == getSecurityCode()) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+}

src/facade/examples/bank/WelcomeMessage.java

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+package facade.examples.bank;
+
+/**
+ * Created by luisburgos on 12/08/15.
+ */
+public class WelcomeMessage {
+    public WelcomeMessage(){
+        System.out.println("Welcome to this BANK.");
+    }
+}

src/facade/examples/computer/CPU.java

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+package facade.examples.computer;
+
+/**
+ * Created by luisburgos on 12/08/15.
+ */
+public class CPU {
+    public void freeze() {
+        System.out.println("CPU: Freezing...");
+    }
+
+    public void execute() {
+        System.out.println("CPU: Executing...");
+    }
+
+    public void jump() {
+        System.out.println("CPU: Jumping...");
+    }
+}

src/facade/examples/computer/ComputerFacade.java

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+package facade.examples.computer;
+
+/**
+ * Created by luisburgos on 12/08/15.
+ */
+public class ComputerFacade {
+
+    private CPU cpu;
+    private HardDrive hardDrive;
+    private Memory memory;
+
+    public ComputerFacade(){
+        this.cpu       = new CPU();
+        this.hardDrive = new HardDrive();
+        this.memory    = new Memory();
+    }
+
+    public void start(){
+        System.out.println("STARTING...");
+        cpu.freeze();
+        memory.load();
+        hardDrive.read();
+        cpu.jump();
+        cpu.execute();
+    }
+
+}

src/facade/examples/computer/HardDrive.java

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+package facade.examples.computer;
+
+/**
+ * Created by luisburgos on 12/08/15.
+ */
+public class HardDrive {
+    public void read() {
+        System.out.println("HARD DRIVE: Reading...");
+    }
+
+}

src/facade/examples/computer/Memory.java

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+package facade.examples.computer;
+
+/**
+ * Created by luisburgos on 12/08/15.
+ */
+public class Memory {
+    public void load() {
+        System.out.println("MEMORY: Loading...");
+    }
+}

src/facade/examples/computer/User.java

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+package facade.examples.computer;
+
+/**
+ * Created by luisburgos on 12/08/15.
+ */
+public class User {
+
+    public static void main(String[] args) {
+        ComputerFacade computer = new ComputerFacade();
+        computer.start();
+    }
+
+}