Add filter for methods annotated with @lombok.Generated (#513)

Based on initial contribution by Rüdiger zu Dohna.

2 files changed, 50 insertions, 3 deletions

diff --git a/org.jacoco.core/src/org/jacoco/core/internal/analysis/MethodAnalyzer.java b/org.jacoco.core/src/org/jacoco/core/internal/analysis/MethodAnalyzer.java
index a912e333..e5dde709 100644
--- a/org.jacoco.core/src/org/jacoco/core/internal/analysis/MethodAnalyzer.java
+++ b/org.jacoco.core/src/org/jacoco/core/internal/analysis/MethodAnalyzer.java
@@ -21,6 +21,7 @@ import org.jacoco.core.analysis.IMethodCoverage;
 import org.jacoco.core.analysis.ISourceNode;
 import org.jacoco.core.internal.analysis.filter.IFilter;
 import org.jacoco.core.internal.analysis.filter.IFilterOutput;
+import org.jacoco.core.internal.analysis.filter.LombokGeneratedFilter;
 import org.jacoco.core.internal.analysis.filter.SynchronizedFilter;
 import org.jacoco.core.internal.analysis.filter.SyntheticFilter;
 import org.jacoco.core.internal.flow.IFrame;
@@ -42,7 +43,8 @@ public class MethodAnalyzer extends MethodProbesVisitor
 		implements IFilterOutput {
 
 	private static final IFilter[] FILTERS = new IFilter[] {
-			new SyntheticFilter(), new SynchronizedFilter() };
+			new SyntheticFilter(), new SynchronizedFilter(),
+			new LombokGeneratedFilter() };
 
 	private final boolean[] probes;
 
@@ -328,8 +330,9 @@ public class MethodAnalyzer extends MethodProbesVisitor
 			final int covered = i.getCoveredBranches();
 			final ICounter instrCounter = covered == 0 ? CounterImpl.COUNTER_1_0
 					: CounterImpl.COUNTER_0_1;
-			final ICounter branchCounter = total > 1 ? CounterImpl.getInstance(
-					total - covered, covered) : CounterImpl.COUNTER_0_0;
+			final ICounter branchCounter = total > 1
+					? CounterImpl.getInstance(total - covered, covered)
+					: CounterImpl.COUNTER_0_0;
 			coverage.increment(instrCounter, branchCounter, i.getLine());
 		}
 		coverage.incrementMethodCounter();
diff --git a/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/LombokGeneratedFilter.java b/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/LombokGeneratedFilter.java
new file mode 100644
index 00000000..9f23ecd8
--- /dev/null
+++ b/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/LombokGeneratedFilter.java
@@ -0,0 +1,44 @@
+/*******************************************************************************
+ * Copyright (c) 2009, 2017 Mountainminds GmbH & Co. KG and Contributors
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Marc R. Hoffmann - initial API and implementation
+ *
+ *******************************************************************************/
+package org.jacoco.core.internal.analysis.filter;
+
+import java.util.List;
+
+import org.objectweb.asm.tree.AnnotationNode;
+import org.objectweb.asm.tree.MethodNode;
+
+/**
+ * Filters methods annotated with <code>@lombok.Generated</code>.
+ */
+public class LombokGeneratedFilter implements IFilter {
+
+	public void filter(final MethodNode methodNode,
+			final IFilterOutput output) {
+		if (hasLombokGeneratedAnnotation(methodNode)) {
+			output.ignore(methodNode.instructions.getFirst(),
+					methodNode.instructions.getLast());
+		}
+	}
+
+	private boolean hasLombokGeneratedAnnotation(final MethodNode methodNode) {
+		final List<AnnotationNode> runtimeInvisibleAnnotations = methodNode.invisibleAnnotations;
+		if (runtimeInvisibleAnnotations != null) {
+			for (final AnnotationNode annotation : runtimeInvisibleAnnotations) {
+				if ("Llombok/Generated;".equals(annotation.desc)) {
+					return true;
+				}
+			}
+		}
+		return false;
+	}
+
+}