Message based json formatter

cucumber-core/src/main/java/io/cucumber/core/plugin/IdNamingVisitor.java

@@ -0,0 +1,61 @@
+package io.cucumber.core.plugin;
+
+import io.cucumber.messages.types.Examples;
+import io.cucumber.messages.types.Feature;
+import io.cucumber.messages.types.Pickle;
+import io.cucumber.messages.types.Rule;
+import io.cucumber.messages.types.Scenario;
+import io.cucumber.messages.types.TableRow;
+import io.cucumber.query.LineageReducer;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+import java.util.regex.Pattern;
+
+class IdNamingVisitor implements LineageReducer.Collector<String> {
+
+    private static final Pattern replacementPattern = Pattern.compile("[\\s'_,!]");
+
+    private final List<String> parts = new ArrayList<>();
+
+    @Override
+    public void add(Feature feature) {
+        parts.add(formatId(feature.getName()));
+    }
+
+    @Override
+    public void add(Rule rule) {
+        parts.add(formatId(rule.getName()));
+    }
+
+    @Override
+    public void add(Scenario scenario) {
+        parts.add(formatId(scenario.getName()));
+    }
+
+    @Override
+    public void add(Examples examples, int index) {
+        parts.add(formatId(examples.getName()));
+    }
+
+    @Override
+    public void add(TableRow example, int index) {
+        // json report uses base-1 indexing, and skips the first row
+        parts.add(String.valueOf(index + 2));
+    }
+
+    @Override
+    public void add(Pickle pickle) {
+        formatId(pickle.getName());
+    }
+
+    @Override
+    public String finish() {
+        return String.join(";", parts);
+    }
+
+    static String formatId(String name) {
+        return replacementPattern.matcher(name).replaceAll("-").toLowerCase(Locale.ROOT);
+    }
+}