Multi-layer PCB support

diy-layout-creator --username bancika@gmail.com/diylc-core/src/org/diylc/common/PCBLayer.java

@@ -0,0 +1,10 @@
+package org.diylc.common;
+
+public enum PCBLayer {
+
+	_1, _2, _3, _4, _5;
+	
+	public String toString() {
+		return name().substring(1);
+	};
+}

diy-layout-creator --username bancika@gmail.com/diylc-core/src/org/diylc/presenter/ComponentZOrderFiler.java

@@ -1,23 +0,0 @@
-package org.diylc.presenter;
-
-import org.diylc.common.ComponentType;
-import org.diylc.common.IComponentFiler;
-import org.diylc.core.IDIYComponent;
-
-public class ComponentZOrderFiler implements IComponentFiler {
-
-	private int zOrder;
-
-	public ComponentZOrderFiler(int zOrder) {
-		super();
-		this.zOrder = zOrder;
-	}
-
-	@SuppressWarnings("unchecked")
-	@Override
-	public boolean testComponent(IDIYComponent<?> component) {
-		ComponentType componentType = ComponentProcessor.getInstance().extractComponentTypeFrom(
-				(Class<? extends IDIYComponent<?>>) component.getClass());
-		return Math.round(componentType.getZOrder()) == zOrder;
-	}
-}

diy-layout-creator --username bancika@gmail.com/diylc-core/src/org/diylc/presenter/PCBLayerFiler.java

@@ -0,0 +1,30 @@
+package org.diylc.presenter;
+
+import java.lang.reflect.Method;
+
+import org.diylc.common.IComponentFiler;
+import org.diylc.common.PCBLayer;
+import org.diylc.core.IDIYComponent;
+
+public class PCBLayerFiler implements IComponentFiler {
+
+	private PCBLayer layer;
+
+	public PCBLayerFiler(PCBLayer layer) {
+		super();
+		this.layer = layer;
+	}
+
+	@SuppressWarnings("unchecked")
+	@Override
+	public boolean testComponent(IDIYComponent<?> component) {
+		Class<?> clazz = component.getClass();
+		try {
+			Method m = clazz.getMethod("getLayer", null);
+			PCBLayer l = (PCBLayer) m.invoke(component);
+			return layer == l;
+		} catch (Exception e) {
+			return false;
+		}		
+	}
+}