Merge pull request #281 from ankurkaushal/master

Reformat according to google style guide

interpreter/src/main/java/com/iluwatar/interpreter/App.java

@@ -4,75 +4,66 @@ import java.util.Stack;
 
 /**
  * 
- * The Interpreter pattern is a design pattern that specifies how to evaluate sentences 
- * in a language. The basic idea is to have a class for each symbol (terminal or nonterminal) 
- * in a specialized computer language. The syntax tree of a sentence in the language is an 
- * instance of the composite pattern and is used to evaluate (interpret) the sentence for a 
- * client.
+ * The Interpreter pattern is a design pattern that specifies how to evaluate sentences in a
+ * language. The basic idea is to have a class for each symbol (terminal or nonterminal) in a
+ * specialized computer language. The syntax tree of a sentence in the language is an instance of
+ * the composite pattern and is used to evaluate (interpret) the sentence for a client.
  * <p>
- * In this example we use the Interpreter pattern to break sentences into expressions 
- * ({@link Expression}) that can be evaluated and as a whole form the result.
+ * In this example we use the Interpreter pattern to break sentences into expressions (
+ * {@link Expression}) that can be evaluated and as a whole form the result.
  * 
  */
 public class App {
 
-	/**
-	 * 
-	 * Program entry point.
-	 * <p>
-	 * Expressions can be evaluated using prefix, infix or postfix notations
-	 * This sample uses postfix, where operator comes after the operands
-	 * 
-	 * @param args command line args
-	 * 
-	 */
-	public static void main(String[] args) {
-		String tokenString = "4 3 2 - 1 + *";
-		Stack<Expression> stack = new Stack<>();
+  /**
+   * 
+   * Program entry point.
+   * <p>
+   * Expressions can be evaluated using prefix, infix or postfix notations This sample uses postfix,
+   * where operator comes after the operands
+   * 
+   * @param args command line args
+   * 
+   */
+  public static void main(String[] args) {
+    String tokenString = "4 3 2 - 1 + *";
+    Stack<Expression> stack = new Stack<>();
 
-		String[] tokenList = tokenString.split(" ");
-		for (String s : tokenList) {
-			if (isOperator(s)) {
-				Expression rightExpression = stack.pop();
-				Expression leftExpression = stack.pop();
-				System.out
-						.println(String.format(
-								"popped from stack left: %d right: %d",
-								leftExpression.interpret(),
-								rightExpression.interpret()));
-				Expression operator = getOperatorInstance(s, leftExpression,
-						rightExpression);
-				System.out.println(String.format("operator: %s", operator));
-				int result = operator.interpret();
-				NumberExpression resultExpression = new NumberExpression(result);
-				stack.push(resultExpression);
-				System.out.println(String.format("push result to stack: %d",
-						resultExpression.interpret()));
-			} else {
-				Expression i = new NumberExpression(s);
-				stack.push(i);
-				System.out.println(String.format("push to stack: %d",
-						i.interpret()));
-			}
-		}
-		System.out
-				.println(String.format("result: %d", stack.pop().interpret()));
-	}
+    String[] tokenList = tokenString.split(" ");
+    for (String s : tokenList) {
+      if (isOperator(s)) {
+        Expression rightExpression = stack.pop();
+        Expression leftExpression = stack.pop();
+        System.out.println(String.format("popped from stack left: %d right: %d",
+            leftExpression.interpret(), rightExpression.interpret()));
+        Expression operator = getOperatorInstance(s, leftExpression, rightExpression);
+        System.out.println(String.format("operator: %s", operator));
+        int result = operator.interpret();
+        NumberExpression resultExpression = new NumberExpression(result);
+        stack.push(resultExpression);
+        System.out.println(String.format("push result to stack: %d", resultExpression.interpret()));
+      } else {
+        Expression i = new NumberExpression(s);
+        stack.push(i);
+        System.out.println(String.format("push to stack: %d", i.interpret()));
+      }
+    }
+    System.out.println(String.format("result: %d", stack.pop().interpret()));
+  }
 
-	public static boolean isOperator(String s) {
-		return s.equals("+") || s.equals("-") || s.equals("*");
-	}
+  public static boolean isOperator(String s) {
+    return s.equals("+") || s.equals("-") || s.equals("*");
+  }
 
-	public static Expression getOperatorInstance(String s, Expression left,
-			Expression right) {
-		switch (s) {
-		case "+":
-			return new PlusExpression(left, right);
-		case "-":
-			return new MinusExpression(left, right);
-		case "*":
-			return new MultiplyExpression(left, right);
-		}
-		return null;
-	}
+  public static Expression getOperatorInstance(String s, Expression left, Expression right) {
+    switch (s) {
+      case "+":
+        return new PlusExpression(left, right);
+      case "-":
+        return new MinusExpression(left, right);
+      case "*":
+        return new MultiplyExpression(left, right);
+    }
+    return null;
+  }
 }

interpreter/src/main/java/com/iluwatar/interpreter/Expression.java

@@ -7,8 +7,8 @@ package com.iluwatar.interpreter;
  */
 public abstract class Expression {
 
-	public abstract int interpret();
+  public abstract int interpret();
 
-	@Override
-	public abstract String toString();
+  @Override
+  public abstract String toString();
 }

interpreter/src/main/java/com/iluwatar/interpreter/MinusExpression.java

@@ -7,22 +7,22 @@ package com.iluwatar.interpreter;
  */
 public class MinusExpression extends Expression {
 
-	private Expression leftExpression;
-	private Expression rightExpression;
+  private Expression leftExpression;
+  private Expression rightExpression;
 
-	public MinusExpression(Expression leftExpression, Expression rightExpression) {
-		this.leftExpression = leftExpression;
-		this.rightExpression = rightExpression;
-	}
+  public MinusExpression(Expression leftExpression, Expression rightExpression) {
+    this.leftExpression = leftExpression;
+    this.rightExpression = rightExpression;
+  }
 
-	@Override
-	public int interpret() {
-		return leftExpression.interpret() - rightExpression.interpret();
-	}
+  @Override
+  public int interpret() {
+    return leftExpression.interpret() - rightExpression.interpret();
+  }
 
-	@Override
-	public String toString() {
-		return "-";
-	}
+  @Override
+  public String toString() {
+    return "-";
+  }
 
 }

interpreter/src/main/java/com/iluwatar/interpreter/MultiplyExpression.java

@@ -7,23 +7,22 @@ package com.iluwatar.interpreter;
  */
 public class MultiplyExpression extends Expression {
 
-	private Expression leftExpression;
-	private Expression rightExpression;
+  private Expression leftExpression;
+  private Expression rightExpression;
 
-	public MultiplyExpression(Expression leftExpression,
-			Expression rightExpression) {
-		this.leftExpression = leftExpression;
-		this.rightExpression = rightExpression;
-	}
+  public MultiplyExpression(Expression leftExpression, Expression rightExpression) {
+    this.leftExpression = leftExpression;
+    this.rightExpression = rightExpression;
+  }
 
-	@Override
-	public int interpret() {
-		return leftExpression.interpret() * rightExpression.interpret();
-	}
+  @Override
+  public int interpret() {
+    return leftExpression.interpret() * rightExpression.interpret();
+  }
 
-	@Override
-	public String toString() {
-		return "*";
-	}
+  @Override
+  public String toString() {
+    return "*";
+  }
 
 }

interpreter/src/main/java/com/iluwatar/interpreter/NumberExpression.java

@@ -7,24 +7,23 @@ package com.iluwatar.interpreter;
  */
 public class NumberExpression extends Expression {
 
-	private int number;
+  private int number;
 
-	public NumberExpression(int number) {
-		this.number = number;
-	}
+  public NumberExpression(int number) {
+    this.number = number;
+  }
 
-	public NumberExpression(String s) {
-		this.number = Integer.parseInt(s);
-	}
+  public NumberExpression(String s) {
+    this.number = Integer.parseInt(s);
+  }
 
-	@Override
-	public int interpret() {
-		return number;
-	}
-
-	@Override
-	public String toString() {
-		return "number";
-	}
+  @Override
+  public int interpret() {
+    return number;
+  }
 
+  @Override
+  public String toString() {
+    return "number";
+  }
 }

interpreter/src/main/java/com/iluwatar/interpreter/PlusExpression.java

@@ -7,22 +7,21 @@ package com.iluwatar.interpreter;
  */
 public class PlusExpression extends Expression {
 
-	private Expression leftExpression;
-	private Expression rightExpression;
+  private Expression leftExpression;
+  private Expression rightExpression;
 
-	public PlusExpression(Expression leftExpression, Expression rightExpression) {
-		this.leftExpression = leftExpression;
-		this.rightExpression = rightExpression;
-	}
+  public PlusExpression(Expression leftExpression, Expression rightExpression) {
+    this.leftExpression = leftExpression;
+    this.rightExpression = rightExpression;
+  }
 
-	@Override
-	public int interpret() {
-		return leftExpression.interpret() + rightExpression.interpret();
-	}
-
-	@Override
-	public String toString() {
-		return "+";
-	}
+  @Override
+  public int interpret() {
+    return leftExpression.interpret() + rightExpression.interpret();
+  }
 
+  @Override
+  public String toString() {
+    return "+";
+  }
 }

interpreter/src/test/java/com/iluwatar/interpreter/AppTest.java

@@ -11,9 +11,9 @@ import com.iluwatar.interpreter.App;
  */
 public class AppTest {
 
-	@Test
-	public void test() {
-		String[] args = {};
-		App.main(args);
-	}
+  @Test
+  public void test() {
+    String[] args = {};
+    App.main(args);
+  }
 }