Merge the matrix-java-sdk due to it no longer maintained. Remove thirdparty repositories.

src/main/java/io/kamax/matrix/json/MatrixJsonObject.java

@@ -0,0 +1,110 @@
+/*
+ * matrix-java-sdk - Matrix Client SDK for Java
+ * Copyright (C) 2017 Kamax Sarl
+ *
+ * https://www.kamax.io/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package io.kamax.matrix.json;
+
+import com.google.gson.*;
+
+import java.util.Objects;
+import java.util.Optional;
+
+public class MatrixJsonObject {
+
+    private JsonObject obj;
+
+    public MatrixJsonObject(JsonObject obj) {
+        if (Objects.isNull(obj)) {
+            throw new InvalidJsonException("JSON Object is null");
+        }
+
+        this.obj = obj;
+    }
+
+    protected Optional<String> findString(String field) {
+        return GsonUtil.findString(obj, field);
+    }
+
+    protected String getString(String field) {
+        return GsonUtil.getStringOrNull(obj, field);
+    }
+
+    protected String getStringOrNull(JsonObject obj, String field) {
+        return GsonUtil.findString(obj, field).orElse(null);
+    }
+
+    protected String getStringOrNull(String field) {
+        return getStringOrNull(obj, field);
+    }
+
+    protected int getInt(String field) {
+        return GsonUtil.getPrimitive(obj, field).getAsInt();
+    }
+
+    protected int getInt(String field, int failover) {
+        return GsonUtil.findPrimitive(obj, field).map(JsonPrimitive::getAsInt).orElse(failover);
+    }
+
+    protected Optional<Long> findLong(String field) {
+        return GsonUtil.findLong(obj, field);
+    }
+
+    protected long getLong(String field) {
+        return GsonUtil.getLong(obj, field);
+    }
+
+    /*
+     * Returns the Double value, if the key is present, null else
+     */
+    protected Double getDoubleIfPresent(String field) {
+        if (obj.get(field) != null) {
+            return GsonUtil.getPrimitive(obj, field).getAsDouble();
+        }
+        return null;
+    }
+
+    protected JsonObject asObj(JsonElement el) {
+        if (!el.isJsonObject()) {
+            throw new IllegalArgumentException("Not a JSON object");
+        }
+
+        return el.getAsJsonObject();
+    }
+
+    protected JsonObject getObj(String field) {
+        return GsonUtil.getObj(obj, field);
+    }
+
+    protected Optional<JsonObject> findObj(String field) {
+        return GsonUtil.findObj(obj, field);
+    }
+
+    protected JsonObject computeObj(String field) {
+        return findObj(field).orElseGet(JsonObject::new);
+    }
+
+    protected Optional<JsonArray> findArray(String field) {
+        return GsonUtil.findArray(obj, field);
+    }
+
+    public JsonObject getJson() {
+        return obj;
+    }
+
+}