universe@127: package de.uapcore.lightpit.types;
universe@127: 
universe@127: public final class WebColor {
universe@127: 
universe@127:     private final String hex;
universe@127: 
universe@127:     /**
universe@127:      * Constructs a color object from a hex string.
universe@127:      * @param hex the 6 digits hex string optionally preceded by a hash symbol
universe@127:      * @throws IllegalArgumentException if the given string does not specify a color
universe@127:      */
universe@127:     public WebColor(String hex) throws IllegalArgumentException {
universe@127:         this.hex = (hex.startsWith("#") ? hex : ("#"+hex)).toUpperCase();
universe@127:         if (!this.hex.matches("#[0-9A-F]{6}"))
universe@127:             throw new IllegalArgumentException(hex+" is not a color");
universe@127:     }
universe@127: 
universe@127:     /**
universe@127:      * Returns the hex representation without th leading hash symbol.
universe@127:      * @return the hex representation of this color (e.g. FF0000 for red)
universe@127:      */
universe@127:     public String getHex() {
universe@127:         return hex.substring(1);
universe@127:     }
universe@127: 
universe@127:     @Override
universe@127:     public String toString() {
universe@127:         return hex;
universe@127:     }
universe@127: }