eu.hansolo.toolbox.geom.Dimension Maven / Gradle / Ivy

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package eu.hansolo.toolbox.geom;

import static eu.hansolo.toolbox.Constants.COLON;
import static eu.hansolo.toolbox.Constants.COMMA;
import static eu.hansolo.toolbox.Constants.CURLY_BRACKET_CLOSE;
import static eu.hansolo.toolbox.Constants.CURLY_BRACKET_OPEN;
import static eu.hansolo.toolbox.Constants.QUOTES;


public class Dimension {
    private int    hash;
    private double width;
    private double height;


    // ******************** Constructors **************************************
    public Dimension() {
        this(0, 0);
    }
    public Dimension(final double width, final double height) {
        this.hash   = 0;
        this.width  = width;
        this.height = height;
    }


    // ******************** Methods *******************************************
    public double getWidth() { return width; }
    public void setWidth(final double width) { this.width = width; }

    public double getHeight() { return height; }
    public void setHeight(final double height) { this.height = height; }

    public double getCenterX() { return width * 0.5; }
    public double getCenterY() { return height * 0.5; }
    public Point getCenter() { return new Point(width * 0.5, height * 0.5); }

    public void set(final double width, final double height) {
        this.width  = width;
        this.height = height;
    }
    public void set(final Dimension dimension) {
        this.width  = dimension.getWidth();
        this.height = dimension.getHeight();
    }

    @Override public boolean equals(Object obj) {
        if (obj == this) return true;
        if (obj instanceof Dimension) {
            Dimension other = (Dimension) obj;
            return getWidth() == other.getWidth() && getHeight() == other.getHeight();
        } else return false;
    }

    @Override public int hashCode() {
        if (hash == 0) {
            long bits = 7L;
            bits = 31L * bits + Double.doubleToLongBits(getWidth());
            bits = 31L * bits + Double.doubleToLongBits(getHeight());
            hash = (int) (bits ^ (bits >> 32));
        }
        return hash;
    }

    @Override public String toString() {
        return new StringBuilder().append(CURLY_BRACKET_OPEN)
                                  .append(QUOTES).append("w").append(QUOTES).append(COLON).append(getWidth()).append(COMMA)
                                  .append(QUOTES).append("h").append(QUOTES).append(COLON).append(getHeight())
                                  .append(CURLY_BRACKET_CLOSE)
                                  .toString();
    }
}