Add Stats utility

src/main/java/ru/noties/enhance/ApiInfoStore.java

@@ -3,6 +3,8 @@
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 import java.io.File;
+import java.util.HashMap;
+import java.util.Map;
 
 public abstract class ApiInfoStore {
 
@@ -11,6 +13,16 @@ public static ApiInfoStore create(@Nonnull File apiVersions) {
         return new ApiInfoStoreImpl(apiVersions);
     }
 
+    static class TypeVersion extends ApiInfo {
+
+        final Map<String, ApiInfo> fields = new HashMap<>(3);
+        final Map<String, ApiInfo> methods = new HashMap<>(3);
+
+        TypeVersion(ApiVersion since, ApiVersion deprecated) {
+            super(since, deprecated);
+        }
+    }
+
     @Nullable
     public abstract ApiInfo type(@Nonnull String type);
 
@@ -19,4 +31,7 @@ public static ApiInfoStore create(@Nonnull File apiVersions) {
 
     @Nullable
     public abstract ApiInfo method(@Nonnull String type, @Nonnull String signature);
+
+    @Nonnull
+    public abstract Map<String, TypeVersion> info();
 }

src/main/java/ru/noties/enhance/ApiInfoStoreImpl.java

@@ -15,16 +15,6 @@
 
 class ApiInfoStoreImpl extends ApiInfoStore {
 
-    private static class TypeVersion extends ApiInfo {
-
-        private final Map<String, ApiInfo> fields = new HashMap<>(3);
-        private final Map<String, ApiInfo> methods = new HashMap<>(3);
-
-        private TypeVersion(ApiVersion since, ApiVersion deprecated) {
-            super(since, deprecated);
-        }
-    }
-
     private final Map<String, TypeVersion> map;
 
     ApiInfoStoreImpl(@Nonnull File apiVersions) {
@@ -55,6 +45,12 @@ public ApiInfo method(@Nonnull String type, @Nonnull String signature) {
                 : null;
     }
 
+    @Nonnull
+    @Override
+    public Map<String, TypeVersion> info() {
+        return map;
+    }
+
     private static class Parser {
 
         private static final String NAME = "name";

src/main/java/ru/noties/enhance/Enhance.java

@@ -8,9 +8,13 @@
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStreamReader;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.Locale;
+import java.util.Map;
 
 import static ru.noties.enhance.Log.log;
+import static ru.noties.enhance.Stats.printStatsFor;
 
 public class Enhance {
 
@@ -64,6 +68,10 @@ public static void main(String[] args) {
         log("[Enhance] parsing api-versions.xml");
 
         final ApiInfoStore store = ApiInfoStore.create(sdkHelper.apiVersions());
+//        if (true) {
+//            printStatsFor(ApiVersion.latest(), store.info());
+//            return;
+//        }
 
         final File sdkSources = sdkHelper.source();
 

src/main/java/ru/noties/enhance/Stats.java

@@ -0,0 +1,106 @@
+package ru.noties.enhance;
+
+import javax.annotation.Nonnull;
+import java.util.*;
+
+abstract class Stats {
+
+    static void printStatsFor(@Nonnull ApiVersion version, @Nonnull Map<String, ApiInfoStore.TypeVersion> info) {
+
+        // filter
+        final Map<String, ApiInfoStore.TypeVersion> filtered = new HashMap<>();
+
+        for (Map.Entry<String, ApiInfoStore.TypeVersion> types : info.entrySet()) {
+
+            final ApiInfoStore.TypeVersion original = types.getValue();
+            final ApiInfoStore.TypeVersion typeVersion = new ApiInfoStore.TypeVersion(original.since, original.deprecated);
+
+            for (Map.Entry<String, ApiInfo> fields : original.fields.entrySet()) {
+                if (shouldEmit(version, fields.getValue())) {
+                    typeVersion.fields.put(fields.getKey(), fields.getValue());
+                }
+            }
+
+            for (Map.Entry<String, ApiInfo> methods : original.methods.entrySet()) {
+                if (shouldEmit(version, methods.getValue())) {
+                    typeVersion.methods.put(methods.getKey(), methods.getValue());
+                }
+            }
+
+            if (shouldEmit(version, original)
+                    || (typeVersion.fields.size() > 0 || typeVersion.methods.size() > 0)) {
+                filtered.put(types.getKey(), typeVersion);
+            }
+        }
+
+        final StringBuilder builder = new StringBuilder();
+
+        for (String type : sorted(filtered.keySet())) {
+            builder.setLength(0);
+            builder.append("```diff\n");
+
+            final ApiInfoStore.TypeVersion typeVersion = filtered.get(type);
+            appendDiffed(builder, version, typeVersion);
+            builder
+                    .append(type)
+                    .append('\n');
+
+            final Map<String, ApiInfo> fields = typeVersion.fields;
+            final Map<String, ApiInfo> methods = typeVersion.methods;
+
+            for (String field : sorted(fields.keySet())) {
+                if (appendDiffed(builder, version, fields.get(field))) {
+                    builder.append("   ")
+                            .append(field)
+                            .append("\n");
+                }
+            }
+
+            for (String method : sorted(methods.keySet())) {
+                if (appendDiffed(builder, version, methods.get(method))) {
+                    builder.append("   ")
+                            .append(method)
+                            .append("\n");
+                }
+            }
+
+            builder.append("```\n\n");
+            System.out.println(builder);
+        }
+    }
+
+    private static boolean shouldEmit(@Nonnull ApiVersion version, @Nonnull ApiInfo info) {
+        return version == info.since || version == info.deprecated;
+    }
+
+    private static List<String> sorted(@Nonnull Collection<String> collection) {
+        final List<String> list = new ArrayList<>(collection);
+        Collections.sort(list);
+        return list;
+    }
+
+    private static boolean appendDiffed(
+            @Nonnull StringBuilder builder,
+            @Nonnull ApiVersion version,
+            @Nonnull ApiInfo info) {
+
+        // priority for deprecated (some nodes are both added and deprecated in the same version)
+
+        boolean result = false;
+
+        if (version == info.deprecated) {
+            builder.append('-');
+            result = true;
+        }
+
+        if (version == info.since) {
+            builder.append('+');
+            result = true;
+        }
+
+        return result;
+    }
+
+    private Stats() {
+    }
+}