added TODOs to report wip

after/src/main/java/org/apache/commons/lang3/reflect/FieldUtils.java

@@ -120,16 +120,11 @@ public static Field getField(final Class<?> cls, final String fieldName, final b
             }
         }
 
-        final List<Class<?>> interfaces = ClassUtils.getAllInterfaces(cls);
-        if (interfaces == null) {
-            return null;
-        }
-
         // check the public interface case. This must be manually searched for
         // incase there is a public supersuperclass field hidden by a private/package
         // superclass field.
         Field match = null;
-        for (final Class<?> class1 : interfaces) {
+        for (final Class<?> class1 : ClassUtils.getAllInterfaces(cls)) {
             try {
                 final Field test = class1.getField(fieldName);
                 Validate.isTrue(match == null, "Reference to field %s is ambiguous relative to %s"

after/src/main/java/org/apache/commons/lang3/reflect/MethodUtils.java

@@ -476,7 +476,7 @@ static Object[] getVarArgs(final Object[] args, final Class<?>[] methodParameter
         final int varArgLength = args.length - methodParameterTypes.length + 1;
 
         if (varArgComponentType == null) {
-            throw new NullPointerException("last method parameter type is not an array");
+            throw new IllegalArgumentException("last method parameter type is not an array");
         }
 
         Object varArgsArray = Array.newInstance(ClassUtils.primitiveToWrapper(varArgComponentType), varArgLength);

report.tex

@@ -56,7 +56,7 @@
 \geometry{left=2cm,right=2cm,top=2cm,bottom=3cm}
 \title{
 \vspace{-5ex} 
-Assignment 1 -- Software Analysis \\\vspace{0.5cm}
+Assignment 2 -- Software Analysis \\\vspace{0.5cm}
 \Large Static Analysis with Infer
 \vspace{-1ex} 
 }
@@ -136,15 +136,12 @@ on \textit{gitlab.com}. The script \textit{docker-infer.sh} can be executed to
 automatically run the Infer tool using default options through the course
 tools docker image \textit{bugcounting/satools:y23}.
 
-The script selects Java 17 to compile the project as this is required to not
-make the Animal Sniffer Maven build plugin fail with the message ``This feature
-requires ASM7''. 
-
 The script executes Infer in Maven capture mode executing the \textit{compile}
 and \textit{test} targets while disabling the Apache RAT software license
-checker (which fails for this release). Since unit tests are executed, running
-the script before and after the warning guided refactoring ensures the fixes I
-introduce do not introduce regressions.
+checker (which fails for this release) and the Animal Sniffer Maven plugin do to
+the failure message ``This feature requires ASM7'' it produces if ran.  Since
+unit tests are executed, running the script before and after the warning guided
+refactoring ensures the fixes I introduce do not introduce regressions.
 
 The analysis outputs
 are located in \textit{before/infer-out/report.txt}.
@@ -161,8 +158,7 @@ result.
 \toprule
 \textbf{File} & \textbf{Line} & \textbf{Kind} & \textbf{True Pos.} &
 \textbf{Reason why flagged expression is a false positive} \\ \midrule
-AnnotationUtils.java & 72 & Null & Yes & \multirow{4}{6cm}{--} \\
-reflect/MethodUtils.java & 486 & Null & Yes & \\
+AnnotationUtils.java & 72 & Null & Yes & \\
 reflect/FieldUtils.java & 126 & Null & Yes & \\
 concurrent/MultiBackgroundInitializer.java & 160 & Thread Safety & Yes & \\
 \midrule
@@ -170,9 +166,11 @@ builder/ToStringBuilder.java & 223 & Null & No & \multirow{2}{6cm}{Infer flags
         the value \texttt{null} when used as a nullable method argument} \\
 builder/ReflectionToStringBuilder.java & 131 & Null & No & \\
 \midrule
-time/DurationUtils.java & 142 & Null & No & The method which may return a null
-value returns a non-null value if its parameter is non-null, and a
-non-null parameter is given \\
+time/DurationUtils.java & 142 & Null & No & \multirow{3}{6.2cm}{The method which
+        may return a null value returns a non-null value if its parameter is
+        non-null, and a non-null parameter is given} \\ 
+reflect/MethodUtils.java & 486 & Null & No & \\
+        \\ \hspace{1cm} \\
 \midrule 
 CharSetUtils.java & 181 & Null & No & According to \textit{java.lang}
 documentation, the method always returns a non-null value \\
@@ -197,9 +195,9 @@ documentation for the inner nested method \\ \bottomrule
 \end{table}
 
 In total Infer reports 13 warnings, 12 of which are null dereference warnings
-and 1 is a thread safety violation. Of all warnings, 4 are true positives and 9
-are false positives, resulting in a false positive ratio of over 69\%. These
-values are summarized in table \ref{tab:num}.
+and 1 is a thread safety violation. Of all warnings, 3 are true positives and 10
+are false positives, resulting in a precision of 23\%.
+These values are summarized in table \ref{tab:num}.
 
 \begin{table}[H]
     \centering
@@ -208,8 +206,8 @@ values are summarized in table \ref{tab:num}.
 Total number of warnings:  & 13 \\ \midrule
 Null dereference warnings: & 12 \\
 Thread safety violations:  & 1  \\ \midrule
-True positives:            & 4  \\
-False positives:           & 9  \\ \bottomrule
+True positives:            & 3  \\
+False positives:           & 10 \\ \bottomrule
 \end{tabular}
     \caption{Quantitative results of the static analysis performed by Infer.}
     \label{tab:num}
@@ -226,7 +224,8 @@ In other cases, the flagged expression is guarded by an utility method throwing
 an exception if its value is indeed \texttt{null}. One of such guards is the
 \mintinline{java}{static Validate.notNull(Object, String, Object...)} method,
 which checks if its first argument is null and throws a
-\texttt{NullPointerException} if so.
+\texttt{NullPointerException} with a ``pretty'' message composed from a format
+string and variadic arguments if so.
 
 Additionally, Infer seems to struggle with boxed primitives and not
 understanding that their value is always non-null by construction. As an example
@@ -280,5 +279,37 @@ causing null dereferences.
 In this section I now cover the warnings that are true positives and thus are
 causes for refactoring.
 
+\begin{center}
+\color{red}
+- field utils violation of contract
+
+- missing synchronized in multibackground
+
+- Annotation utils protected method no contract on field fixed by returning
+"empty" value
+
+- no additional warnings appear after fix
+
+- cool that a contract violation has been found
+
+- tests pass after fixes so no regression
+\end{center}
+
+\section{Conclusions}
+
+\begin{center}
+\color{red}
+- project is mature, few detections but still a couple for null values which
+    shows how insidious they are. (Null and thread safety are popular and
+    relevant to the project) 
+
+- infer compared to pmd gives warnings about potential execution paths (data
+flow analysis) while pmd is style only and bound to the language
+
+- sonarqube kind of covers some ground infer does. it combines the powers of
+pmd (patterns common to the language to avoid/pursue) with some data flow 
+analysis (some nullability check). No overlap with Infer results
+\end{center}
+
 \end{document}