Application: gvSIG desktop » Library: org.gvsig.tools

import org.gvsig.tools.dataTypes.DataTypesManager.Coercion;

public class CoerceToColor implements Coercion {

    private static Map<String,Color> colorTable = null;

    @Override

    public Object coerce(Object value) throws CoercionException {

            if (value == null || value instanceof Color) {

                return value;

            }

            if( value instanceof Number ) {

                int rgb = ((Number)value).intValue();

                Color color = new Color(rgb); // Alpha??

                return color;

            }

            String s = value.toString().trim();

            if( s.startsWith("rgb(") ) {

                s = s.replace(")", "");

                String[] x = StringUtils.split(s, ",");

                if( x.length<3 || x.length>4 ) {

                    throw new CoercionException("Can't convert '"+value.toString()+"' to color.");

                }

                try {

                    Color color;

                    int r = NumberUtils.createInteger(x[0]);

                    int g = NumberUtils.createInteger(x[1]);

                    int b = NumberUtils.createInteger(x[2]);

                    if( x.length==3 ) {

                        color = new Color(r, g, b);

                    } else {

                        int a = NumberUtils.createInteger(x[3]);

                        color = new Color(r, g, b, a);

                    }

                    return color;

                } catch(NumberFormatException ex) {

                    throw new CoercionException("Can't convert '"+value.toString()+"' to color.");

                }

            }

            if( s.startsWith("#") ) {

                s = "0x" + s.substring(1); 

            }

            try {

                int rgb = NumberUtils.createInteger(s);

                Color color = new Color(rgb);

                return color;

            } catch(NumberFormatException ex) {

                // Pass, do nothing

            }

            Color color = this.getColor(s);

            if( color == null ) {

                throw new CoercionException("Can't convert '"+value.toString()+"' to color.");

            }

            return color;

        } catch (Exception e) {

            throw new CoercionException(e);

    private Color getColor(String name) {

        if( colorTable==null ) {

            //

            // HTML Color Names

            // from https://www.w3schools.com/colors/colors_names.asp

            //

            colorTable = new HashMap<>();

            colorTable.put("aliceblue",new Color(0xF0,0xF8,0xFF));

            colorTable.put("antiquewhite",new Color(0xFA,0xEB,0xD7));

            colorTable.put("aqua",new Color(0x00,0xFF,0xFF));

            colorTable.put("aquamarine",new Color(0x7F,0xFF,0xD4));

            colorTable.put("azure",new Color(0xF0,0xFF,0xFF));

            colorTable.put("beige",new Color(0xF5,0xF5,0xDC));

            colorTable.put("bisque",new Color(0xFF,0xE4,0xC4));

            colorTable.put("black",new Color(0x00,0x00,0x00));

            colorTable.put("blanchedalmond",new Color(0xFF,0xEB,0xCD));

            colorTable.put("blue",new Color(0x00,0x00,0xFF));

            colorTable.put("blueviolet",new Color(0x8A,0x2B,0xE2));

            colorTable.put("brown",new Color(0xA5,0x2A,0x2A));

            colorTable.put("burlywood",new Color(0xDE,0xB8,0x87));

            colorTable.put("cadetblue",new Color(0x5F,0x9E,0xA0));

            colorTable.put("chartreuse",new Color(0x7F,0xFF,0x00));

            colorTable.put("chocolate",new Color(0xD2,0x69,0x1E));

            colorTable.put("coral",new Color(0xFF,0x7F,0x50));

            colorTable.put("cornflowerblue",new Color(0x64,0x95,0xED));

            colorTable.put("cornsilk",new Color(0xFF,0xF8,0xDC));

            colorTable.put("crimson",new Color(0xDC,0x14,0x3C));

            colorTable.put("cyan",new Color(0x00,0xFF,0xFF));

            colorTable.put("darkblue",new Color(0x00,0x00,0x8B));

            colorTable.put("darkcyan",new Color(0x00,0x8B,0x8B));

            colorTable.put("darkgoldenRod",new Color(0xB8,0x86,0x0B));

            colorTable.put("darkgray",new Color(0xA9,0xA9,0xA9));

            colorTable.put("darkgrey",new Color(0xA9,0xA9,0xA9));

            colorTable.put("darkgreen",new Color(0x00,0x64,0x00));

            colorTable.put("darkkhaki",new Color(0xBD,0xB7,0x6B));

            colorTable.put("darkmagenta",new Color(0x8B,0x00,0x8B));

            colorTable.put("darkolivegreen",new Color(0x55,0x6B,0x2F));

            colorTable.put("darkorange",new Color(0xFF,0x8C,0x00));

            colorTable.put("darkorchid",new Color(0x99,0x32,0xCC));

            colorTable.put("darkred",new Color(0x8B,0x00,0x00));

            colorTable.put("darksalmon",new Color(0xE9,0x96,0x7A));

            colorTable.put("darkseagreen",new Color(0x8F,0xBC,0x8F));

            colorTable.put("darkslateblue",new Color(0x48,0x3D,0x8B));

            colorTable.put("darkslategray",new Color(0x2F,0x4F,0x4F));

            colorTable.put("darkslategrey",new Color(0x2F,0x4F,0x4F));

            colorTable.put("darkturquoise",new Color(0x00,0xCE,0xD1));

            colorTable.put("darkviolet",new Color(0x94,0x00,0xD3));

            colorTable.put("deeppink",new Color(0xFF,0x14,0x93));

            colorTable.put("deepskyblue",new Color(0x00,0xBF,0xFF));

            colorTable.put("dimgray",new Color(0x69,0x69,0x69));

            colorTable.put("dimgrey",new Color(0x69,0x69,0x69));

            colorTable.put("dodgerblue",new Color(0x1E,0x90,0xFF));

            colorTable.put("firebrick",new Color(0xB2,0x22,0x22));

            colorTable.put("floralwhite",new Color(0xFF,0xFA,0xF0));

            colorTable.put("forestgreen",new Color(0x22,0x8B,0x22));

            colorTable.put("fuchsia",new Color(0xFF,0x00,0xFF));

            colorTable.put("gainsboro",new Color(0xDC,0xDC,0xDC));

            colorTable.put("ghostwhite",new Color(0xF8,0xF8,0xFF));

            colorTable.put("gold",new Color(0xFF,0xD7,0x00));

            colorTable.put("goldenrod",new Color(0xDA,0xA5,0x20));

            colorTable.put("gray",new Color(0x80,0x80,0x80));

            colorTable.put("grey",new Color(0x80,0x80,0x80));

            colorTable.put("green",new Color(0x00,0x80,0x00));

            colorTable.put("greenyellow",new Color(0xAD,0xFF,0x2F));

            colorTable.put("honeydew",new Color(0xF0,0xFF,0xF0));

            colorTable.put("hotpink",new Color(0xFF,0x69,0xB4));

            colorTable.put("indianred",new Color(0xCD,0x5C,0x5C));

            colorTable.put("indigo",new Color(0x4B,0x00,0x82));

            colorTable.put("ivory",new Color(0xFF,0xFF,0xF0));

            colorTable.put("khaki",new Color(0xF0,0xE6,0x8C));

            colorTable.put("lavender",new Color(0xE6,0xE6,0xFA));

            colorTable.put("lavenderblush",new Color(0xFF,0xF0,0xF5));

            colorTable.put("lawnGreen",new Color(0x7C,0xFC,0x00));

            colorTable.put("lemonchiffon",new Color(0xFF,0xFA,0xCD));

            colorTable.put("lightblue",new Color(0xAD,0xD8,0xE6));

            colorTable.put("lightcoral",new Color(0xF0,0x80,0x80));

            colorTable.put("lightcyan",new Color(0xE0,0xFF,0xFF));

            colorTable.put("lightgoldenRodYellow",new Color(0xFA,0xFA,0xD2));

            colorTable.put("lightgray",new Color(0xD3,0xD3,0xD3));

            colorTable.put("lightgrey",new Color(0xD3,0xD3,0xD3));

            colorTable.put("lightgreen",new Color(0x90,0xEE,0x90));

            colorTable.put("lightpink",new Color(0xFF,0xB6,0xC1));

            colorTable.put("lightsalmon",new Color(0xFF,0xA0,0x7A));

            colorTable.put("lightseagreen",new Color(0x20,0xB2,0xAA));

            colorTable.put("lightskyblue",new Color(0x87,0xCE,0xFA));

            colorTable.put("lightslategray",new Color(0x77,0x88,0x99));

            colorTable.put("lightslategrey",new Color(0x77,0x88,0x99));

            colorTable.put("lightsteelblue",new Color(0xB0,0xC4,0xDE));

            colorTable.put("lightyellow",new Color(0xFF,0xFF,0xE0));

            colorTable.put("lime",new Color(0x00,0xFF,0x00));

            colorTable.put("limegreen",new Color(0x32,0xCD,0x32));

            colorTable.put("linen",new Color(0xFA,0xF0,0xE6));

            colorTable.put("magenta",new Color(0xFF,0x00,0xFF));

            colorTable.put("maroon",new Color(0x80,0x00,0x00));

            colorTable.put("mediumaquamarine",new Color(0x66,0xCD,0xAA));

            colorTable.put("mediumblue",new Color(0x00,0x00,0xCD));

            colorTable.put("mediumorchid",new Color(0xBA,0x55,0xD3));

            colorTable.put("mediumpurple",new Color(0x93,0x70,0xDB));

            colorTable.put("mediumseagreen",new Color(0x3C,0xB3,0x71));

            colorTable.put("mediumslateblue",new Color(0x7B,0x68,0xEE));

            colorTable.put("mediumspringgreen",new Color(0x00,0xFA,0x9A));

            colorTable.put("mediumturquoise",new Color(0x48,0xD1,0xCC));

            colorTable.put("mediumvioletred",new Color(0xC7,0x15,0x85));

            colorTable.put("midnightblue",new Color(0x19,0x19,0x70));

            colorTable.put("mintcream",new Color(0xF5,0xFF,0xFA));

            colorTable.put("mistyrose",new Color(0xFF,0xE4,0xE1));

            colorTable.put("moccasin",new Color(0xFF,0xE4,0xB5));

            colorTable.put("navajowhite",new Color(0xFF,0xDE,0xAD));

            colorTable.put("navy",new Color(0x00,0x00,0x80));

            colorTable.put("oldlace",new Color(0xFD,0xF5,0xE6));

            colorTable.put("olive",new Color(0x80,0x80,0x00));

            colorTable.put("olivedrab",new Color(0x6B,0x8E,0x23));

            colorTable.put("orange",new Color(0xFF,0xA5,0x00));

            colorTable.put("orangered",new Color(0xFF,0x45,0x00));

            colorTable.put("orchid",new Color(0xDA,0x70,0xD6));

            colorTable.put("palegoldenrod",new Color(0xEE,0xE8,0xAA));

            colorTable.put("palegreen",new Color(0x98,0xFB,0x98));

            colorTable.put("paleturquoise",new Color(0xAF,0xEE,0xEE));

            colorTable.put("palevioletred",new Color(0xDB,0x70,0x93));

            colorTable.put("papayawhip",new Color(0xFF,0xEF,0xD5));

            colorTable.put("peachpuff",new Color(0xFF,0xDA,0xB9));

            colorTable.put("peru",new Color(0xCD,0x85,0x3F));

            colorTable.put("pink",new Color(0xFF,0xC0,0xCB));

            colorTable.put("plum",new Color(0xDD,0xA0,0xDD));

            colorTable.put("powderblue",new Color(0xB0,0xE0,0xE6));

            colorTable.put("purple",new Color(0x80,0x00,0x80));

            colorTable.put("rebeccapurple",new Color(0x66,0x33,0x99));

            colorTable.put("red",new Color(0xFF,0x00,0x00));

            colorTable.put("rosybrown",new Color(0xBC,0x8F,0x8F));

            colorTable.put("royalblue",new Color(0x41,0x69,0xE1));

            colorTable.put("saddlebrown",new Color(0x8B,0x45,0x13));

            colorTable.put("salmon",new Color(0xFA,0x80,0x72));

            colorTable.put("sandybrown",new Color(0xF4,0xA4,0x60));

            colorTable.put("seagreen",new Color(0x2E,0x8B,0x57));

            colorTable.put("seashell",new Color(0xFF,0xF5,0xEE));

            colorTable.put("sienna",new Color(0xA0,0x52,0x2D));

            colorTable.put("silver",new Color(0xC0,0xC0,0xC0));

            colorTable.put("skyblue",new Color(0x87,0xCE,0xEB));

            colorTable.put("slateblue",new Color(0x6A,0x5A,0xCD));

            colorTable.put("Slategray",new Color(0x70,0x80,0x90));

            colorTable.put("slategrey",new Color(0x70,0x80,0x90));

            colorTable.put("snow",new Color(0xFF,0xFA,0xFA));

            colorTable.put("springgreen",new Color(0x00,0xFF,0x7F));

            colorTable.put("steelblue",new Color(0x46,0x82,0xB4));

            colorTable.put("tan",new Color(0xD2,0xB4,0x8C));

            colorTable.put("teal",new Color(0x00,0x80,0x80));

            colorTable.put("thistle",new Color(0xD8,0xBF,0xD8));

            colorTable.put("tomato",new Color(0xFF,0x63,0x47));

            colorTable.put("turquoise",new Color(0x40,0xE0,0xD0));

            colorTable.put("violet",new Color(0xEE,0x82,0xEE));

            colorTable.put("wheat",new Color(0xF5,0xDE,0xB3));

            colorTable.put("white",new Color(0xFF,0xFF,0xFF));

            colorTable.put("whitesmoke",new Color(0xF5,0xF5,0xF5));

            colorTable.put("yellow",new Color(0xFF,0xFF,0x00));

            colorTable.put("yellowgreen",new Color(0x9A,0xCD,0x32));

        }

        return colorTable.get(name.toLowerCase());

    public static class CoerceColorToString implements Coercion {

        @Override

        public Object coerce(Object value) throws CoercionException {

            if( value == null ) {

                return null;

            }

            if( value instanceof Color ) {

                int rgb = ((Color) value).getRGB();

                int r = ((Color) value).getRed();

                int g = ((Color) value).getGreen();

                int b = ((Color) value).getBlue();

                int a = ((Color) value).getAlpha();

                for (Map.Entry<String, Color> entry : colorTable.entrySet()) {

                    String name = entry.getKey();

                    Color color = entry.getValue();

                    if( rgb==color.getRGB() && color.getAlpha()==a ) {

                        return name;

                    }

                }

                return String.format("rgb(0x%02x,0x%02x,0x%02x,0x%02x)", r,g,b,a);

            }

            throw new CoercionException("Can't convert '"+value.getClass().getName()+"' to string");

    public static void selfRegister() {

        DataTypesManager dataTypesManager = ToolsLocator.getDataTypesManager();

        dataTypesManager.addtype(DataTypes.COLOR, null, "Color", Color.class, new CoerceToColor());

        dataTypesManager.addCoercion(DataTypes.STRING, new CoerceColorToString());

    }