X-Git-Url: https://mograsim.net/gitweb/?a=blobdiff_plain;f=plugins%2Fnet.mograsim.machine%2Fsrc%2Fnet%2Fmograsim%2Fmachine%2FMachineRegistry.java;h=089cf31c9fb9f69671211e0204a8a0afccbd23e9;hb=3278dbc72d3d3c803dc5ad2c0dfedc42b277a3d6;hp=28e792169c5e50d24fa2d05e6edf4bd49647206f;hpb=f919efc362c3de5c94d894dc8fc7fe22c03fc865;p=Mograsim.git

diff --git a/plugins/net.mograsim.machine/src/net/mograsim/machine/MachineRegistry.java b/plugins/net.mograsim.machine/src/net/mograsim/machine/MachineRegistry.java
index 28e79216..089cf31c 100644
--- a/plugins/net.mograsim.machine/src/net/mograsim/machine/MachineRegistry.java
+++ b/plugins/net.mograsim.machine/src/net/mograsim/machine/MachineRegistry.java
@@ -3,7 +3,11 @@ package net.mograsim.machine;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IConfigurationElement;
 import org.eclipse.core.runtime.IExtension;
@@ -12,11 +16,21 @@ import org.eclipse.core.runtime.IExtensionRegistry;
 import org.eclipse.core.runtime.IRegistryEventListener;
 import org.eclipse.core.runtime.Platform;
 
+/**
+ * The MachineRegsitry is a static context registry for all {@link MachineDefinition}s known at any point during runtime.
+ * <p>
+ * It is updated automatically as mograsim machine definition extension points ({@link #MACHINE_EXT_ID}) are added or removed.
+ *
+ * @author Christian Femers
+ *
+ */
 public class MachineRegistry
 {
-	private static final String MACHINE_EXT_ID = "net.mograsim.machine.machine_definition";
 
-	private static final Map<String, MachineDefinition> installedMachines = new HashMap<>();
+	public static final String MACHINE_EXT_ID = "net.mograsim.machine.machine_definition";
+
+	private static final Map<String, MachineDefinition> installedMachines = Collections.synchronizedMap(new HashMap<>());
+	private static final Set<MachineRegistryListener> listeners = Collections.synchronizedSet(new HashSet<>());
 
 	private static void reload()
 	{
@@ -35,7 +49,11 @@ public class MachineRegistry
 				if (o instanceof MachineDefinition)
 				{
 					System.out.println("Found " + id);
-					installedMachines.put(id, (MachineDefinition) o);
+					MachineDefinition md = (MachineDefinition) o;
+					if (Objects.equals(id, md.getId()))
+						installedMachines.put(id, md);
+					else
+						System.err.println("Machine definition ids to not match: " + id + " and " + md.getId());
 				} else
 				{
 					System.err.println("Invalid machine definition: " + o + "(id=" + id + "");
@@ -46,6 +64,7 @@ public class MachineRegistry
 		{
 			System.out.println(ex.getMessage());
 		}
+		notifyListeners();
 	}
 
 	public static void initialize()
@@ -89,4 +108,26 @@ public class MachineRegistry
 	{
 		return installedMachines.get(id);
 	}
+
+	private static void notifyListeners()
+	{
+		Map<String, MachineDefinition> unmodMachines = getInstalledMachines();
+		listeners.forEach(l -> l.onReload(unmodMachines));
+	}
+
+	public static void addMachineRegistryListener(MachineRegistryListener listener)
+	{
+		listeners.add(listener);
+	}
+
+	public static void removeMachineRegistryListener(MachineRegistryListener listener)
+	{
+		listeners.remove(listener);
+	}
+
+	@FunctionalInterface
+	public interface MachineRegistryListener
+	{
+		void onReload(Map<String, MachineDefinition> installedMachines);
+	}
 }