Add support for protoLint JSON format

src/main/java/edu/hm/hafner/analysis/parser/ProtoLintJsonParser.java

@@ -0,0 +1,62 @@
+package edu.hm.hafner.analysis.parser;
+
+import org.json.JSONArray;
+import org.json.JSONObject;
+
+import edu.hm.hafner.analysis.Issue;
+import edu.hm.hafner.analysis.IssueBuilder;
+import edu.hm.hafner.analysis.Report;
+import edu.hm.hafner.analysis.Severity;
+
+/**
+ * Parser for ProtoLint JSON reports.
+ *
+ * <p>The recommended report format is JSON. The JSON report contains more information (affected rule, severity,
+ * basedir) as the plaintext format. For full feature set please use protoLint &gt;= 0.50.2.
+ *
+ * <p>We still support plaintext reports and JSON reports generated with protoLint &lt; 0.50.2 as well.
+ *
+ * @author [email protected]
+ * @see <a href="https://github.com/yoheimuta/protolint">https://github.com/yoheimuta/protolint</a>
+ */
+public class ProtoLintJsonParser extends JsonIssueParser {
+    private static final long serialVersionUID = 573706779074579673L;
+
+    @Override
+    protected void parseJsonObject(final Report report, final JSONObject jsonReport, final IssueBuilder issueBuilder) {
+        String basedir = jsonReport.optString("basedir");
+        JSONArray results = jsonReport.optJSONArray("lints", new JSONArray(0));
+
+        parseResults(report, basedir, results, issueBuilder);
+    }
+
+    private void parseResults(final Report report, final String basedir, final JSONArray jsonReport, final IssueBuilder issueBuilder) {
+        for (int i = 0; i < jsonReport.length(); i++) {
+            JSONObject finding = (JSONObject) jsonReport.get(i);
+            report.add(convertToIssue(basedir, finding, issueBuilder));
+        }
+    }
+
+    private Issue convertToIssue(final String basedir, final JSONObject finding, final IssueBuilder issueBuilder) {
+        // The filename is always relative to the working dir the protoLint process was started with.
+        // In order to get the absolute filename we need to prepend the basedir which is available with protoLint >= 0.50.2
+        String filename = finding.getString("filename");
+        if (!basedir.isEmpty()) {
+            filename = basedir + "/" + filename;
+        }
+        return issueBuilder.setFileName(filename)
+                .setLineStart(finding.getInt("line"))
+                .setColumnStart(finding.getInt("column"))
+                .setMessage(finding.getString("message"))
+                .setSeverity(mapSeverity(finding.optString("severity")))
+                .setType(finding.getString("rule"))
+                .buildAndClean();
+    }
+
+    private Severity mapSeverity(final String aProtoLintSeverity) {
+        // ProtoLint knows the following severities
+        // https://github.com/yoheimuta/protolint/blob/master/linter/rule/rule.go#L9
+        // which can be mapped with the provided mapping method 
+        return Severity.guessFromString(aProtoLintSeverity);
+    }
+}

src/main/java/edu/hm/hafner/analysis/parser/ProtoLintParser.java

@@ -10,7 +10,9 @@
 import edu.hm.hafner.util.LookaheadStream;
 
 /**
- * Parser for ProtoLint.
+ * Parser for ProtoLint plaintext reports.
+ *
+ * <p>The recommended report format is now JSON! This parser is just used as fallback.
  *
  * @author David Hart
  * @see <a href="https://github.com/yoheimuta/protolint">https://github.com/yoheimuta/protolint</a>

src/main/java/edu/hm/hafner/analysis/registry/ProtoLintDescriptor.java

@@ -1,14 +1,25 @@
 package edu.hm.hafner.analysis.registry;
 
+import static j2html.TagCreator.a;
+import static j2html.TagCreator.code;
+import static j2html.TagCreator.join;
+import static j2html.TagCreator.text;
+
+import java.util.Collection;
+
 import edu.hm.hafner.analysis.IssueParser;
+import edu.hm.hafner.analysis.parser.ProtoLintJsonParser;
 import edu.hm.hafner.analysis.parser.ProtoLintParser;
 
 /**
  * A descriptor for ProtoLint.
  *
+ * <p>We use a composite parser for supporting JSON (preferred) and plaintext (fallback) format.
+ *
  * @author Lorenz Munsch
+ * @author [email protected]
  */
-class ProtoLintDescriptor extends ParserDescriptor {
+class ProtoLintDescriptor extends CompositeParserDescriptor {
     private static final String ID = "protolint";
     private static final String NAME = "ProtoLint";
 
@@ -17,8 +28,17 @@ class ProtoLintDescriptor extends ParserDescriptor {
     }
 
     @Override
-    public IssueParser createParser(final Option... options) {
-        return new ProtoLintParser();
+    protected Collection<? extends IssueParser> createParsers() {
+        return asList(new ProtoLintJsonParser(), new ProtoLintParser());
+    }
+
+    @Override
+    public String getHelp() {
+        return join(text("Use protolint with options"),
+                code("-reporter=json -output_file=protolint-report.json"),
+                text(", see"),
+                a("protoLint CLI options").withHref("https://github.com/yoheimuta/protolint?tab=readme-ov-file#usage"),
+                text("for usage details.")).render();
     }
 
     @Override

src/test/java/edu/hm/hafner/analysis/parser/ProtoLintJsonParserTest.java

@@ -0,0 +1,83 @@
+package edu.hm.hafner.analysis.parser;
+
+import edu.hm.hafner.analysis.IssueParser;
+import edu.hm.hafner.analysis.Report;
+import edu.hm.hafner.analysis.Severity;
+import edu.hm.hafner.analysis.assertions.SoftAssertions;
+import edu.hm.hafner.analysis.registry.AbstractParserTest;
+
+import static edu.hm.hafner.analysis.assertions.Assertions.*;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+/**
+ * Test class for {@link ProtoLintJsonParser}.
+ *
+ * @author [email protected]
+ */
+class ProtoLintJsonParserTest extends AbstractParserTest {
+    ProtoLintJsonParserTest() {
+        super("protolint_0.50.2.json");
+    }
+
+    @Override
+    public void assertThatIssuesArePresent(final Report report, final SoftAssertions softly) {
+        assertThat(report).hasSize(462);
+
+        softly.assertThat(report.get(4))
+                .hasSeverity(Severity.WARNING_LOW)
+                .hasLineStart(3)
+                .hasColumnStart(5)
+                .hasMessage("Found an incorrect indentation style \"    \". \"  \" is correct.")
+                .hasFileName("/home/jwiesner/Development/github/profhenry/protolint/_example/proto/issue_111/multipleFixersApplicable.proto")
+                .hasType("INDENT");
+
+        softly.assertThat(report.get(12))
+                .hasSeverity(Severity.ERROR)
+                .hasLineStart(3)
+                .hasColumnStart(5)
+                .hasMessage("EnumField name \"UNKNOWN\" should have the prefix \"ENUM_ALLOWING_ALIAS\"")
+                .hasFileName("/home/jwiesner/Development/github/profhenry/protolint/_example/proto/issue_111/multipleFixersApplicable.proto")
+                .hasType("ENUM_FIELD_NAMES_PREFIX");
+
+        softly.assertThat(report.get(224))
+                .hasSeverity(Severity.WARNING_NORMAL)
+                .hasLineStart(207)
+                .hasColumnStart(3)
+                .hasMessage("Field \"amount\" should have a comment")
+                .hasFileName("/home/jwiesner/Development/github/profhenry/protolint/_example/proto/issue_128/grpc-gateway_a_bit_of_everything.proto")
+                .hasType("FIELDS_HAVE_COMMENT");
+    }
+
+    @Override
+    public IssueParser createParser() {
+        return new ProtoLintJsonParser();
+    }
+
+    @Test
+    @DisplayName("Parsing json report generated with protolint 0.49.8")
+    void json0498() {
+        Report report = parse("protolint_0.49.8.json");
+
+        assertThat(report).hasSize(352);
+
+        try (SoftAssertions softly = new SoftAssertions()) {
+            softly.assertThat(report.get(2))
+                    .hasSeverity(Severity.WARNING_LOW)
+                    .hasLineStart(3)
+                    .hasColumnStart(5)
+                    .hasMessage("Found an incorrect indentation style \"    \". \"  \" is correct.")
+                    .hasFileName("_example/proto/issue_111/multipleFixersApplicable.proto")
+                    .hasType("INDENT");
+
+            softly.assertThat(report.get(10))
+                    .hasSeverity(Severity.WARNING_LOW)
+                    .hasLineStart(3)
+                    .hasColumnStart(5)
+                    .hasMessage("EnumField name \"UNKNOWN\" should have the prefix \"ENUM_ALLOWING_ALIAS\"")
+                    .hasFileName("_example/proto/issue_111/multipleFixersApplicable.proto")
+                    .hasType("ENUM_FIELD_NAMES_PREFIX");
+        }
+    }
+}

src/test/java/edu/hm/hafner/analysis/registry/ParsersTest.java

@@ -807,12 +807,18 @@ void shouldFindNoJavacIssuesInEclipseOutput() {
         findIssuesOfTool(0, "java", "eclipse.txt");
     }
 
-    /** Runs the ProtoLint parser on an output file that contains 10 issues. */
+    /** Runs the ProtoLint parser on a plaintext output file that contains 2591 issues. */
     @Test
     void shouldFindAllProtoLintIssues() {
         findIssuesOfTool(2591, "protolint", "protolint.txt");
     }
 
+    /** Runs the ProtoLint parser on a json output file that contains 462 issues. */
+    @Test
+    void shouldFindAllProtoLintIssuesJsonFormat() {
+        findIssuesOfTool(462, "protolint", "protolint_0.50.2.json");
+    }
+
     /** Runs the HadoLint parser on an output file that contains 5 issues. */
     @Test
     void shouldFindAllHadoLintIssues() {