Configs

src/main/java/ru/bclib/util/JsonFactory.java

@@ -0,0 +1,93 @@
+package ru.bclib.util;
+
+import java.io.File;
+import java.io.FileReader;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+
+import ru.bclib.BCLib;
+
+public class JsonFactory {
+	public final static Gson GSON = new GsonBuilder().setPrettyPrinting().create();
+
+	public static JsonObject getJsonObject(InputStream stream) {
+		try {
+			Reader reader = new InputStreamReader(stream);
+			JsonElement json = loadJson(reader);
+			if (json != null && json.isJsonObject()) {
+				JsonObject jsonObject = json.getAsJsonObject();
+				return jsonObject != null ? jsonObject : new JsonObject();
+			}
+		}
+		catch (Exception ex) {
+			BCLib.LOGGER.catching(ex);
+		}
+		return new JsonObject();
+	}
+
+	public static JsonObject getJsonObject(File jsonFile) {
+		if (jsonFile.exists()) {
+			JsonElement json = loadJson(jsonFile);
+			if (json != null && json.isJsonObject()) {
+				JsonObject jsonObject = json.getAsJsonObject();
+				return jsonObject != null ? jsonObject : new JsonObject();
+			}
+		}
+		return new JsonObject();
+	}
+
+	public static JsonElement loadJson(File jsonFile) {
+		if (jsonFile.exists()) {
+			try (Reader reader = new FileReader(jsonFile)) {
+				return loadJson(reader);
+			}
+			catch (Exception ex) {
+				BCLib.LOGGER.catching(ex);
+			}
+		}
+		return null;
+	}
+
+	public static JsonElement loadJson(Reader reader) {
+		return GSON.fromJson(reader, JsonElement.class);
+	}
+
+	public static void storeJson(File jsonFile, JsonElement jsonObject) {
+		try (FileWriter writer = new FileWriter(jsonFile)) {
+			String json = GSON.toJson(jsonObject);
+			writer.write(json);
+			writer.flush();
+		}
+		catch (IOException ex) {
+			BCLib.LOGGER.catching(ex);
+		}
+	}
+
+	public static int getInt(JsonObject object, String member, int def) {
+		JsonElement elem = object.get(member);
+		return elem == null ? def : elem.getAsInt();
+	}
+
+	public static float getFloat(JsonObject object, String member, float def) {
+		JsonElement elem = object.get(member);
+		return elem == null ? def : elem.getAsFloat();
+	}
+
+	public static boolean getBoolean(JsonObject object, String member, boolean def) {
+		JsonElement elem = object.get(member);
+		return elem == null ? def : elem.getAsBoolean();
+	}
+
+	public static String getString(JsonObject object, String member, String def) {
+		JsonElement elem = object.get(member);
+		return elem == null ? def : elem.getAsString();
+	}
+}