[LIB-2] Add snooker-score-api source files

[snooker-score-api.git] / src / main / java / org / hedgecode / snooker / json / JsonStringToken.java

diff --git a/src/main/java/org/hedgecode/snooker/json/JsonStringToken.java b/src/main/java/org/hedgecode/snooker/json/JsonStringToken.java
new file mode 100644 (file)
index 0000000..b7dd25a
--- /dev/null
+++ b/src/main/java/org/hedgecode/snooker/json/JsonStringToken.java
@@ -0,0 +1,38 @@
+/*

+ * Copyright (c) 2017. Developed by Hedgecode.

+ *

+ * 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.hedgecode.snooker.json;

+

+/**

+ * Null checking Token for parsing input JSON strings.

+ *

+ * @author Dmitry Samoshin aka gotty

+ */

+public final class JsonStringToken {

+

+    private static final String NULL_QUOTES_TOKEN = "\"\"";

+    private static final String NULL_JSON = "[null]";

+

+    private JsonStringToken() {

+    }

+

+    public static String token(String json) {

+        if (json == null || json.isEmpty() || NULL_QUOTES_TOKEN.equals(json))

+            return NULL_JSON;

+        return json;

+    }

+

+}