Added Color parameter (thanks @justgerd)

Author: derNiklaas

src/main/scala/org/codeoverflow/chatoverflow/requirement/parameter/ColorParameterImpl.scala

@@ -0,0 +1,53 @@
+package org.codeoverflow.chatoverflow.requirement.parameter
+
+import org.codeoverflow.chatoverflow.api.io.parameter.ColorParameter
+import org.codeoverflow.chatoverflow.registry.Impl
+import java.awt.Color
+
+/**
+  * A parameter holding a Color value.
+  */
+@Impl(impl = classOf[ColorParameter])
+class ColorParameterImpl extends ColorParameter {
+  private var value: Color = null
+
+  override def getType: Class[Color] = classOf[Color]
+
+  override def serialize(): String = s"${value.getRed},${value.getGreen},${value.getBlue},${value.getAlpha}"
+
+  override def get(): Color = value
+
+  override def deserialize(value: String): Unit = {
+
+    val hex3 = "^#([a-fA-F0-9]{6})$".r
+    val hex4 = "^#([a-fA-F0-9]{8})$".r
+    val int3 = "^(\\d+),(\\d+),(\\d+)$".r
+    val int4 = "^(\\d+),(\\d+),(\\d+),(\\d+)$".r
+    val float3 = "^(\\d+(?:\\.\\d+)?),(\\d+(?:\\.\\d+)?),(\\d+(?:\\.\\d+)?)$".r
+    val float4 = "^(\\d+(?:\\.\\d+)?),(\\d+(?:\\.\\d+)?),(\\d+(?:\\.\\d+)?),(\\d+(?:\\.\\d+)?)$".r
+
+    try {
+      value match {
+        case hex3(hex) => {
+          set(new Color(Integer.valueOf(hex.substring(0, 2), 16),
+            Integer.valueOf(hex.substring(2, 4), 16),
+            Integer.valueOf(hex.substring(4, 6), 16)))
+        }
+        case hex4(hex) =>
+          set(new Color(Integer.valueOf(hex.substring(0, 2), 16),
+            Integer.valueOf(hex.substring(2, 4), 16),
+            Integer.valueOf(hex.substring(4, 6), 16),
+            Integer.valueOf(hex.substring(6, 8), 16)))
+        case int3(r, g, b) => set(new Color(r.toInt, g.toInt, b.toInt))
+        case int4(r, g, b, a) => set(new Color(r.toInt, g.toInt, b.toInt, a.toInt))
+        case float3(r, g, b) => set(new Color(r.toFloat, g.toFloat, b.toFloat))
+        case float4(r, g, b, a) => set(new Color(r.toFloat, g.toFloat, b.toFloat, a.toFloat))
+      }
+    } catch {
+      case _: Exception => print("Can't convert String to color")
+    }
+  }
+
+  override def set(value: Color): Unit = this.value = value
+
+}