From 4ba1c41e8a698ed67e8f262412e1fef7a09c5d17 Mon Sep 17 00:00:00 2001
From: Chris Jaekl <cejaekl@yahoo.com>
Date: Sun, 13 Dec 2015 13:32:47 +0900
Subject: [PATCH] Exclude "METHOD_CALLED" references from consideration as a
 bug's principal location.

---
 prod/net/jaekl/cfb/store/Location.java      |  2 +
 prod/net/jaekl/cfb/xml/BugInstance.java     | 16 ++++-
 test/net/jaekl/cfb/xml/BugInstanceTest.java | 77 +++++++++++++++++++++
 3 files changed, 93 insertions(+), 2 deletions(-)
 create mode 100644 test/net/jaekl/cfb/xml/BugInstanceTest.java

diff --git a/prod/net/jaekl/cfb/store/Location.java b/prod/net/jaekl/cfb/store/Location.java
index 51857eb..d4d1972 100644
--- a/prod/net/jaekl/cfb/store/Location.java
+++ b/prod/net/jaekl/cfb/store/Location.java
@@ -8,6 +8,8 @@ import net.jaekl.cfb.xml.BugMethod;
 import net.jaekl.cfb.xml.SourceLine;
 
 public class Location {
+	public static String METHOD_CALLED = "METHOD_CALLED";
+	
 	Long m_id;
 	String m_className;
 	String m_methodName;
diff --git a/prod/net/jaekl/cfb/xml/BugInstance.java b/prod/net/jaekl/cfb/xml/BugInstance.java
index 0683a7d..b805096 100644
--- a/prod/net/jaekl/cfb/xml/BugInstance.java
+++ b/prod/net/jaekl/cfb/xml/BugInstance.java
@@ -212,9 +212,21 @@ public class BugInstance extends ParseResult {
 	// This should be the place where the bug is reported.
 	Location getPrincipalLocation()
 	{
-		if (null != m_locations && m_locations.size() > 0) {
-			return m_locations.get(0);
+		if (null == m_locations) {
+			return null;
 		}
+		
+		for (int idx = 0; idx < m_locations.size(); ++idx) {
+			Location loc = m_locations.get(idx);
+			if (Location.METHOD_CALLED.equals(loc.getMethodRole())) {
+				// METHOD_CALLED locations describe the method that is being called,
+				// but the bug is located in the caller, not in the callee.
+				// Thus, ignore this information about the callee.
+				continue;
+			}
+			return loc;
+		}
+		
 		return null;
 	}
 	
diff --git a/test/net/jaekl/cfb/xml/BugInstanceTest.java b/test/net/jaekl/cfb/xml/BugInstanceTest.java
new file mode 100644
index 0000000..b7e98fb
--- /dev/null
+++ b/test/net/jaekl/cfb/xml/BugInstanceTest.java
@@ -0,0 +1,77 @@
+package net.jaekl.cfb.xml;
+
+import static org.junit.Assert.*;
+
+import net.jaekl.cfb.store.Location;
+
+import org.junit.Test;
+
+public class BugInstanceTest {
+
+	@Test
+	public void testGetPrincpalLocation() {
+		Location[][][] data = 
+		{
+			{
+				// Location(Long id, String className, String methodName, String methodRole, Integer startLine, Integer endLine)
+				{ 
+					// input
+					new Location( 1L, "ClassOne", "methodOne", "METHOD_CALLED", 1, 12),
+					new Location( 2L, "ClassTwo", "methodTwo", "", 23, 34)
+				},
+				{
+					// expected result
+					new Location( 2L, "ClassTwo", "methodTwo", "", 23, 34)						
+				}
+			},
+			{
+				{
+					// input:  empty set
+				},
+				{
+					// expected result
+					null
+				}
+			},
+			{
+				{
+					// input
+					new Location( 3L, "ClassThree", "methodThree", null, 34, 45),
+					new Location( 4L, "ClassFour",  "methodFour",  null, 45, 56),
+					new Location( 5L, "ClassFive",  "methodFive",  null, 56, 67)
+				},
+				{
+					// expected result
+					new Location( 3L, "ClassThree", "methodThree", null, 34, 45),
+				}
+			},
+			{
+				{
+					// input
+					new Location( 6L, "CLassSix",   "methodSix",   "METHOD_CALLED", 67, 78)
+				},
+				{
+					// expected result
+					null
+				}
+			}
+		};
+		
+		for (Location[][] datum : data) {
+			Location[] input = datum[0];
+			Location expected = datum[1][0];
+			
+			BugInstance bug = new BugInstance(
+						101L, // id
+						"CATEGORY",
+						"TYPE",
+						input,
+						new LocalVariable[0]
+					);
+			Location actual = bug.getPrincipalLocation();
+			
+			assertEquals(expected, actual);
+		}
+	}
+
+}
-- 
2.30.2