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12 changed files with 0 additions and 189 deletions

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@ -1,16 +0,0 @@
package lab11_flyweight.ex1;
public class Brush implements DrawingTool {
private final Props props;
public Brush(Props props) {
this.props = props;
}
@Override
public void draw(String text) {
System.out.println("Drawing '" + text + "' in " + props.size + ", color:" + props.color);
}
public record Props(Size size, Color color) {}
}

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@ -1,17 +0,0 @@
package lab11_flyweight.ex1;
import java.util.HashMap;
import java.util.Map;
public class BrushFactory {
private final Map<Brush.Props, Brush> brushes = new HashMap<>();
public Brush getBrush(Brush.Props props) {
Brush brush = brushes.get(props);
if (brush == null) {
brush = new Brush(props);
brushes.put(props, brush);
}
return brush;
}
}

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@ -1,6 +0,0 @@
package lab11_flyweight.ex1;
public enum Color {
BLUE,
RED
}

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@ -1,5 +0,0 @@
package lab11_flyweight.ex1;
public interface DrawingTool {
void draw(String text);
}

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@ -1,31 +0,0 @@
package lab11_flyweight.ex1;
public class Main {
public static void main(String[] args) {
BrushFactory factory = new BrushFactory();
Brush.Props props1 = new Brush.Props(Size.THICK, Color.RED);
Brush.Props props2 = new Brush.Props(Size.THIN, Color.BLUE);
DrawingTool brush1 = factory.getBrush(props1);
DrawingTool brush2 = factory.getBrush(props1);
brush1.draw("I am drawing with my first thick red brush");
brush2.draw("I am drawing with my second thick red brush");
System.out.println("first thick red brush hashcode: " + brush1.hashCode());
System.out.println("second thick red brush hashcode: " + brush2.hashCode());
System.out.println();
DrawingTool pencil = new Pencil();
pencil.draw("Bonjour");
System.out.println();
DrawingTool brush3 = factory.getBrush(props2);
DrawingTool brush4 = factory.getBrush(props2);
brush3.draw("I am drawing with my first thin blue brush");
brush4.draw("I am drawing with my second thin blue brush");
System.out.println("first thin blue brush hashcode: " + brush3.hashCode());
System.out.println("second thin blue brush hashcode: " + brush4.hashCode());
}
}

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@ -1,8 +0,0 @@
package lab11_flyweight.ex1;
public class Pencil implements DrawingTool {
@Override
public void draw(String text) {
System.out.println("Pencil writes some content: " + text);
}
}

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@ -1,6 +0,0 @@
package lab11_flyweight.ex1;
public enum Size {
THIN,
THICK
}

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@ -1,15 +0,0 @@
package learn.simple_flyweight;
public class ConcreteFlyweight extends Flyweight {
private long intrinsicState;
public ConcreteFlyweight(long intrinsicState) {
super();
this.intrinsicState = intrinsicState;
}
@Override
public void operation(long extrinsicState) {
System.out.println("Flyweight " + intrinsicState + " calling operation with extrinsic state " + extrinsicState);
}
}

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@ -1,13 +0,0 @@
package learn.simple_flyweight;
import java.util.Arrays;
public abstract class Flyweight {
private long[] internalStorage = new long[1000000];
public Flyweight() {
Arrays.fill(internalStorage, 1);
}
public abstract void operation(long extrinsicState);
}

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@ -1,17 +0,0 @@
package learn.simple_flyweight;
import java.util.HashMap;
import java.util.Map;
public class FlyweightFactory {
private static final Map<Integer, Flyweight> flyweights = new HashMap<>();
public Flyweight getFlyweight(Integer key) {
Flyweight flyweight = flyweights.get(key);
if (flyweight == null) {
flyweight = new ConcreteFlyweight(key);
flyweights.put(key, flyweight);
}
return flyweight;
}
}

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@ -1,40 +0,0 @@
package learn.simple_flyweight;
import java.util.Random;
public class Main {
private static final Random rand = new Random();
public static void main(String[] args) {
int rounds = 100;
debugMemory();
testFlyweight(rounds);
debugMemory();
testUnsharedFlyweight(rounds);
debugMemory();
}
private static void debugMemory() {
long totalMemory = Runtime.getRuntime().totalMemory();
long freeMemory = Runtime.getRuntime().freeMemory();
long usedMemory = totalMemory - freeMemory;
System.out.printf("Memory: %d%n", usedMemory);
}
private static void testFlyweight(int rounds) {
FlyweightFactory factory = new FlyweightFactory();
for (int i = 0; i < rounds; i++) {
Flyweight flyweight = factory.getFlyweight(rand.nextInt(10));
flyweight.operation(i);
}
}
private static void testUnsharedFlyweight(int rounds) {
for (int i = 0; i < rounds; i++) {
Flyweight flyweight = new UnsharedConcreteFlyweight(rand.nextInt(10));
flyweight.operation(i);
}
}
}

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@ -1,15 +0,0 @@
package learn.simple_flyweight;
public class UnsharedConcreteFlyweight extends Flyweight {
private long allState;
public UnsharedConcreteFlyweight(long allState) {
super();
this.allState = allState;
}
@Override
public void operation(long extrinsicState) {
System.out.println("Unshared Flyweight " + allState + " calling operation with extrinsic state " + extrinsicState);
}
}