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siordache/FeatureCombiner.java

Created October 13, 2016 20:50
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Answer to http://stackoverflow.com/questions/40023754 using the Streamplify library
Raw
FeatureCombiner.java
import javafx.scene.effect.BoxBlur;
import javafx.scene.effect.Effect;
import javafx.scene.effect.Shadow;
import javafx.scene.paint.Color;
import org.beryx.streamplify.product.CartesianProduct;
import java.util.Arrays;
import java.util.List;
import java.util.function.BiConsumer;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
public class FeatureCombiner {
public static class Characteristics {
private Color color;
private int height;
private int length;
private int width;
private String material;
private int thickness;
private String texture;
private Effect effect;
public Color getColor() {
return color;
}
public void setColor(Color color) {
this.color = color;
}
public int getHeight() {
return height;
}
public void setHeight(int height) {
this.height = height;
}
public int getLength() {
return length;
}
public void setLength(int length) {
this.length = length;
}
public int getWidth() {
return width;
}
public void setWidth(int width) {
this.width = width;
}
public String getMaterial() {
return material;
}
public void setMaterial(String material) {
this.material = material;
}
public int getThickness() {
return thickness;
}
public void setThickness(int thickness) {
this.thickness = thickness;
}
public String getTexture() {
return texture;
}
public void setTexture(String texture) {
this.texture = texture;
}
public Effect getEffect() {
return effect;
}
public void setEffect(Effect effect) {
this.effect = effect;
}
@Override
public String toString() {
return color + ", "
+ height + ", "
+ length + ", "
+ width + ", "
+ material + ", "
+ thickness + ", "
+ texture + ", "
+ effect.getClass().getSimpleName();
}
}
private static class Feature<T> {
final BiConsumer<Characteristics, T> setter;
final List<T> choices;
Feature(BiConsumer<Characteristics, T> setter, T... choices) {
this.setter = setter;
this.choices = Arrays.asList(choices);
}
}
public static void main(String[] args) {
final List<Feature<?>> features = Arrays.asList(
new Feature<Color>(Characteristics::setColor, Color.BLUE, Color.YELLOW, Color.RED),
new Feature<Integer>(Characteristics::setHeight, 20, 30),
new Feature<Integer>(Characteristics::setLength, 100, 120),
new Feature<Integer>(Characteristics::setWidth, 60, 80),
new Feature<String>(Characteristics::setMaterial, "wood", "metal", "glass"),
new Feature<Integer>(Characteristics::setThickness, 4, 6),
new Feature<String>(Characteristics::setTexture, "smooth", "grainy", "velvety"),
new Feature<Effect>(Characteristics::setEffect, new Shadow(), new BoxBlur())
);
int[] dimensions = features.stream().mapToInt(f -> f.choices.size()).toArray();
List<Characteristics> chrVariants = new CartesianProduct(dimensions)
.stream()
.map(prod -> {
Characteristics chr = new Characteristics();
IntStream.range(0, prod.length)
.forEach(i -> {
Feature f = features.get(i);
f.setter.accept(chr, f.choices.get(prod[i]));
});
return chr;
})
.collect(Collectors.toList());
chrVariants.forEach(chr -> System.out.println(chr));
}
}
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