From b7d0da791505ec08bc5e87dc1f5245078c8b3d42 Mon Sep 17 00:00:00 2001
From: Trygve Laugstøl <trygvis@inamo.no>
Date: Sun, 3 Jan 2021 23:31:47 +0100
Subject: Better sorted output files.

---
 src/main/java/io/trygvis/rules/acme/AcmeIo.java | 102 +++++++++++++++++++++---
 1 file changed, 89 insertions(+), 13 deletions(-)

(limited to 'src')

diff --git a/src/main/java/io/trygvis/rules/acme/AcmeIo.java b/src/main/java/io/trygvis/rules/acme/AcmeIo.java
index 9235992..488c93a 100644
--- a/src/main/java/io/trygvis/rules/acme/AcmeIo.java
+++ b/src/main/java/io/trygvis/rules/acme/AcmeIo.java
@@ -11,13 +11,15 @@ import org.kie.api.runtime.rule.FactHandle;
 import java.io.File;
 import java.io.FileWriter;
 import java.io.IOException;
-import java.util.AbstractMap;
+import java.lang.reflect.InvocationTargetException;
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Comparator;
+import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
 import java.util.function.Function;
 
+@SuppressWarnings("unchecked")
 public class AcmeIo {
     private final ObjectMapper mapper;
 
@@ -55,6 +57,73 @@ public class AcmeIo {
         dump(s, factHandles, (o) -> true);
     }
 
+    static class FactCollection<T> {
+        public final Class<T> type;
+        public final List<T> values;
+
+        public FactCollection(Class<T> type) {
+            this.type = type;
+            this.values = new ArrayList<>();
+        }
+
+        public void sort() {
+            var comparator = comparable(type, "key");
+
+            if (comparator == null) {
+                comparator = comparable(type, "name");
+            }
+
+            if (comparator == null) {
+                comparator = Comparator.comparingInt(System::identityHashCode);
+            }
+
+            this.values.sort(comparator);
+        }
+    }
+
+    private static <A, T extends Comparable<T>> Comparator comparable(Class<A> klass, String name) {
+
+        if (klass.getName().contains("Wg")) {
+            System.out.println("AcmeIo.invoker");
+        }
+
+        try {
+            var method = klass.getMethod("get" + name.substring(0, 1).toUpperCase() + name.substring(1));
+            if (!method.isAccessible()) {
+                if (!method.trySetAccessible())
+                    return null;
+            }
+
+            return (a, b) -> {
+                try {
+                    var x = (T) method.invoke(a);
+                    var y = (T) method.invoke(b);
+                    return x.compareTo(y);
+                } catch (IllegalAccessException | InvocationTargetException e) {
+                    throw new RuntimeException(e);
+                }
+            };
+        } catch (NoSuchMethodException ignored) {
+        }
+
+        try {
+            var field = klass.getField(name);
+
+            return (a, b) -> {
+                try {
+                    var x = (T) field.get(a);
+                    var y = (T) field.get(b);
+                    return x.compareTo(y);
+                } catch (IllegalAccessException e) {
+                    throw new RuntimeException(e);
+                }
+            };
+        } catch (NoSuchFieldException ignored) {
+        }
+
+        return null;
+    }
+
     public void dump(String s, Collection<FactHandle> factHandles, Function<Object, Boolean> filter) throws IOException {
         var out = new File("out");
 
@@ -64,7 +133,7 @@ public class AcmeIo {
             }
         }
 
-        List<Map.Entry<String, Object>> facts = new ArrayList<>(factHandles.size());
+        var facts = new HashMap<Class<?>, FactCollection<Object>>(factHandles.size());
         for (var handle : factHandles) {
             if (handle instanceof DefaultFactHandle h) {
                 var obj = h.getObject();
@@ -72,22 +141,29 @@ public class AcmeIo {
                     continue;
                 }
 
-                facts.add(new AbstractMap.SimpleImmutableEntry<>(
-                        h.getObjectClassName(),
-                        obj));
+                Class<?> type = obj.getClass();
+                var collection = facts.get(type);
+
+                if (collection == null) {
+                    collection = new FactCollection(type);
+                    facts.put(type, collection);
+                }
+
+                collection.values.add(obj);
             }
         }
 
-        facts.sort(Map.Entry.comparingByKey());
-
         var factory = mapper.getFactory();
         try (var writer = new FileWriter(new File(out, s + ".yaml"));
              var g = factory.createGenerator(writer)) {
-            for (Map.Entry<String, Object> fact : facts) {
-                g.writeObject(new AcmeObject(
-                        fact.getKey(),
-                        mapper.valueToTree(fact.getValue())
-                ));
+            for (var e : facts.entrySet()) {
+                var name = e.getKey().getName();
+
+                var collection = e.getValue();
+                collection.sort();
+                for (var fact : collection.values) {
+                    g.writeObject(new AcmeObject(name, mapper.valueToTree(fact)));
+                }
             }
         }
     }
-- 
cgit v1.2.3