Updates to the DebugSnapshot system (stack-free logs, global disable switch, print once only)

src/core/lombok/core/debug/DebugSnapshot.java

@@ -22,9 +22,13 @@ public class DebugSnapshot implements Comparable<DebugSnapshot> {
 	public DebugSnapshot(CompilationUnitDeclaration owner, int stackHiding, String message, Object... params) {
 		this.when = System.currentTimeMillis();
 		this.bits = owner.bits;
-		StackTraceElement[] stackTrace = new Throwable().getStackTrace();
-		this.trace = new ArrayList<StackTraceElement>(Math.max(0, stackTrace.length - stackHiding - 1));
-		for (int i = 1 + stackHiding; i < stackTrace.length; i++) trace.add(stackTrace[i]);
+		if (stackHiding < 0) {
+			this.trace = null;
+		} else {
+			StackTraceElement[] stackTrace = new Throwable().getStackTrace();
+			this.trace = new ArrayList<StackTraceElement>(Math.max(0, stackTrace.length - stackHiding - 1));
+			for (int i = 1 + stackHiding; i < stackTrace.length; i++) trace.add(stackTrace[i]);
+		}
 		this.threadName = Thread.currentThread().getName();
 		this.message = message;
 		this.params = params == null ? new Object[0] : params;
@@ -53,8 +57,12 @@ public class DebugSnapshot implements Comparable<DebugSnapshot> {
 	@Override public String toString() {
 		StringBuilder out = new StringBuilder();
 		out.append(shortToString()).append("\n");
-		for (StackTraceElement elem : trace) {
-			out.append("    ").append(elem.toString()).append("\n");
+		if (trace == null) {
+			out.append("    Stack Omitted");
+		} else {
+			for (StackTraceElement elem : trace) {
+				out.append("    ").append(elem.toString()).append("\n");
+			}
 		}
 		return out.toString();
 	}

src/core/lombok/core/debug/DebugSnapshotStore.java

@@ -13,11 +13,13 @@ import org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration;
 
 public class DebugSnapshotStore {
 	public static final DebugSnapshotStore INSTANCE = new DebugSnapshotStore();
+	public static boolean GLOBAL_DSS_DISABLE_SWITCH = true;
 	
 	private final Map<CompilationUnitDeclaration, List<DebugSnapshot>> map =
 			new WeakHashMap<CompilationUnitDeclaration, List<DebugSnapshot>>();
 	
 	public void snapshot(CompilationUnitDeclaration owner, String message, Object... params) {
+		if (GLOBAL_DSS_DISABLE_SWITCH) return;
 		DebugSnapshot snapshot = new DebugSnapshot(owner, 1, message, params);
 		List<DebugSnapshot> list;
 		
@@ -26,18 +28,44 @@ public class DebugSnapshotStore {
 			if (list == null) {
 				list = new ArrayList<DebugSnapshot>();
 				map.put(owner, list);
+				list.add(snapshot);
+			} else if (!list.isEmpty()) {
+				list.add(snapshot);
+			} else {
+				// An empty list is an indicator that we no longer care about that particular CUD.
+			}
+		}
+	}
+	
+	public void log(CompilationUnitDeclaration owner, String message, Object... params) {
+		if (GLOBAL_DSS_DISABLE_SWITCH) return;
+		DebugSnapshot snapshot = new DebugSnapshot(owner, -1, message, params);
+		List<DebugSnapshot> list;
+		
+		synchronized (map) {
+			list = map.get(owner);
+			if (list == null) {
+				list = new ArrayList<DebugSnapshot>();
+				map.put(owner, list);
+				list.add(snapshot);
+			} else if (!list.isEmpty()) {
+				list.add(snapshot);
+			} else {
+				// An empty list is an indicator that we no longer care about that particular CUD.
 			}
-			list.add(snapshot);
 		}
 	}
 	
 	public String print(CompilationUnitDeclaration owner, String message, Object... params) {
+		if (GLOBAL_DSS_DISABLE_SWITCH) return null;
 		List<DebugSnapshot> list;
 		
 		synchronized (map) {
 			snapshot(owner, message == null ? "Printing" : message, params);
 			list = new ArrayList<DebugSnapshot>();
 			list.addAll(map.get(owner));
+			if (list.isEmpty()) return null; // An empty list is an indicator that we no longer care about that particular CUD.
+			map.get(owner).clear();
 		}
 		
 		Collections.sort(list);