Extended support for in-line chained lambdas

Allow users to put a lambda entry breakpoint on a selected lambda if
line contains multiple chained lambda expressions.

Fixes : #732

Co-authored-by: Andrey Loskutov <[email protected]>

Author: SougandhS

org.eclipse.jdt.debug.ui/ui/org/eclipse/jdt/internal/debug/ui/BreakpointMarkerUpdater.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2006, 2021 IBM Corporation and others.
+ * Copyright (c) 2006, 2025 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0

org.eclipse.jdt.debug.ui/ui/org/eclipse/jdt/internal/debug/ui/JDIModelPresentation.java

@@ -1775,33 +1775,35 @@ protected String getMethodBreakpointText(IJavaMethodBreakpoint methodBreakpoint)
 		appendSuspendPolicy(methodBreakpoint,label);
 		appendThreadFilter(methodBreakpoint, label);
 
-
-		boolean entry = methodBreakpoint.isEntry();
-		boolean exit = methodBreakpoint.isExit();
-		if (entry && exit) {
-			label.append(DebugUIMessages.JDIModelPresentation_entry_and_exit);
-		} else if (entry) {
-			label.append(DebugUIMessages.JDIModelPresentation_entry);
-		} else if (exit) {
-			label.append(DebugUIMessages.JDIModelPresentation_exit);
-		}
-		appendConditional(methodBreakpoint, label);
-
-		if (member != null) {
-			label.append(" - "); //$NON-NLS-1$
-			label.append(getJavaLabelProvider().getText(member));
+		if (methodBreakpoint.isLambdaBreakpoint()) {
+			processInLineLambdaLabel(methodBreakpoint, label, member);
 		} else {
-			String methodSig= methodBreakpoint.getMethodSignature();
-			String methodName= methodBreakpoint.getMethodName();
-			if (methodSig != null) {
-				label.append(" - "); //$NON-NLS-1$
-				label.append(Signature.toString(methodSig, methodName, null, false, false));
-			} else if (methodName != null) {
+			boolean entry = methodBreakpoint.isEntry();
+			boolean exit = methodBreakpoint.isExit();
+			if (entry && exit) {
+				label.append(DebugUIMessages.JDIModelPresentation_entry_and_exit);
+			} else if (entry) {
+				label.append(DebugUIMessages.JDIModelPresentation_entry);
+			} else if (exit) {
+				label.append(DebugUIMessages.JDIModelPresentation_exit);
+			}
+			appendConditional(methodBreakpoint, label);
+
+			if (member != null) {
 				label.append(" - "); //$NON-NLS-1$
-				label.append(methodName);
+				label.append(getJavaLabelProvider().getText(member));
+			} else {
+				String methodSig = methodBreakpoint.getMethodSignature();
+				String methodName = methodBreakpoint.getMethodName();
+				if (methodSig != null) {
+					label.append(" - "); //$NON-NLS-1$
+					label.append(Signature.toString(methodSig, methodName, null, false, false));
+				} else if (methodName != null) {
+					label.append(" - "); //$NON-NLS-1$
+					label.append(methodName);
+				}
 			}
 		}
-
 		return label.toString();
 	}
 
@@ -2199,4 +2201,29 @@ public Color getBackground(Object element) {
 	public synchronized boolean requiresUIThread(Object element) {
 		return !isInitialized();
 	}
+
+	/**
+	 * Process custom label for inline lambda breakpoints
+	 */
+	private void processInLineLambdaLabel(IJavaMethodBreakpoint methodBreakpoint, StringBuilder label, IMember member) throws CoreException {
+		appendConditional(methodBreakpoint, label);
+		if (methodBreakpoint.getLambdaName() != null) {
+			label.append(" - [ " + methodBreakpoint.getLambdaName() + " ]"); //$NON-NLS-1$ //$NON-NLS-2$
+		} else {
+			if (member != null) {
+				label.append(" - "); //$NON-NLS-1$
+				label.append(getJavaLabelProvider().getText(member));
+			} else {
+				String methodSig = methodBreakpoint.getMethodSignature();
+				String methodName = methodBreakpoint.getMethodName();
+				if (methodSig != null) {
+					label.append(" - "); //$NON-NLS-1$
+					label.append(Signature.toString(methodSig, methodName, null, false, false));
+				} else if (methodName != null) {
+					label.append(" - "); //$NON-NLS-1$
+					label.append(methodName);
+				}
+			}
+		}
+	}
 }

org.eclipse.jdt.debug.ui/ui/org/eclipse/jdt/internal/debug/ui/actions/ActionMessages.java

@@ -176,6 +176,8 @@ public class ActionMessages extends NLS {
 	public static String Override_Dependencies_label1;
 	public static String Override_Dependencies_label2;
 
+	public static String LambdaSelectionDialog_title;
+
 	static {
 		// load message values from bundle file
 		NLS.initializeMessages(BUNDLE_NAME, ActionMessages.class);

org.eclipse.jdt.debug.ui/ui/org/eclipse/jdt/internal/debug/ui/actions/ActionMessages.properties

@@ -1,5 +1,5 @@
 ###############################################################################
-# Copyright (c) 2000, 2022 IBM Corporation and others.
+# Copyright (c) 2000, 2025 IBM Corporation and others.
 #
 # This program and the accompanying materials
 # are made available under the terms of the Eclipse Public License 2.0
@@ -154,4 +154,5 @@ Override_Dependencies_title=Override Dependencies
 Override_Dependencies_button=&Override
 Override_Dependencies_button1=&Override Dependencies...
 Override_Dependencies_label1=Dependencies derived from the Java Build Path:
-Override_Dependencies_label2=Dependencies for launching:
+Override_Dependencies_label2=Dependencies for launching:
+LambdaSelectionDialog_title=Select lambda