1 files changed, 95 insertions, 0 deletions
diff --git a/java/org/eclipse/jgit/diff/EditDeserializer.java b/java/org/eclipse/jgit/diff/EditDeserializer.java
new file mode 100644
index 0000000000..9435979bf5
--- /dev/null
+++ b/java/org/eclipse/jgit/diff/EditDeserializer.java
@@ -0,0 +1,95 @@
+// Copyright (C) 2009 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package org.eclipse.jgit.diff;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonNull;
+import com.google.gson.JsonParseException;
+import com.google.gson.JsonPrimitive;
+import com.google.gson.JsonSerializationContext;
+import com.google.gson.JsonSerializer;
+import java.lang.reflect.Type;
+import java.util.ArrayList;
+import java.util.List;
+
+public class EditDeserializer implements JsonDeserializer<Edit>, JsonSerializer<Edit> {
+  @Override
+  public Edit deserialize(final JsonElement json, Type typeOfT, JsonDeserializationContext context)
+      throws JsonParseException {
+    if (json.isJsonNull()) {
+      return null;
+    }
+    if (!json.isJsonArray()) {
+      throw new JsonParseException("Expected array for Edit type");
+    }
+
+    final JsonArray o = (JsonArray) json;
+    final int cnt = o.size();
+    if (cnt < 4 || cnt % 4 != 0) {
+      throw new JsonParseException("Expected array of 4 for Edit type");
+    }
+
+    if (4 == cnt) {
+      return new Edit(get(o, 0), get(o, 1), get(o, 2), get(o, 3));
+    }
+
+    List<Edit> l = new ArrayList<>((cnt / 4) - 1);
+    for (int i = 4; i < cnt; ) {
+      int as = get(o, i++);
+      int ae = get(o, i++);
+      int bs = get(o, i++);
+      int be = get(o, i++);
+      l.add(new Edit(as, ae, bs, be));
+    }
+    return new ReplaceEdit(get(o, 0), get(o, 1), get(o, 2), get(o, 3), l);
+  }
+
+  private static int get(JsonArray a, int idx) throws JsonParseException {
+    final JsonElement v = a.get(idx);
+    if (!v.isJsonPrimitive()) {
+      throw new JsonParseException("Expected array of 4 for Edit type");
+    }
+    final JsonPrimitive p = (JsonPrimitive) v;
+    if (!p.isNumber()) {
+      throw new JsonParseException("Expected array of 4 for Edit type");
+    }
+    return p.getAsInt();
+  }
+
+  @Override
+  public JsonElement serialize(final Edit src, Type typeOfSrc, JsonSerializationContext context) {
+    if (src == null) {
+      return JsonNull.INSTANCE;
+    }
+    final JsonArray a = new JsonArray();
+    add(a, src);
+    if (src instanceof ReplaceEdit) {
+      for (Edit e : ((ReplaceEdit) src).getInternalEdits()) {
+        add(a, e);
+      }
+    }
+    return a;
+  }
+
+  private void add(JsonArray a, Edit src) {
+    a.add(new JsonPrimitive(src.getBeginA()));
+    a.add(new JsonPrimitive(src.getEndA()));
+    a.add(new JsonPrimitive(src.getBeginB()));
+    a.add(new JsonPrimitive(src.getEndB()));
+  }
+}