1 files changed, 50 insertions, 0 deletions
diff --git a/src/main/java/org/onap/pnfsimulator/simulator/TemplateVariablesReplacer.java b/src/main/java/org/onap/pnfsimulator/simulator/TemplateVariablesReplacer.java
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index 0000000..eb0b141
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+++ b/src/main/java/org/onap/pnfsimulator/simulator/TemplateVariablesReplacer.java
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+/*
+ * ============LICENSE_START=======================================================
+ * PNF-REGISTRATION-HANDLER
+ * ================================================================================
+ * Copyright (C) 2019 Nokia. All rights reserved.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.pnfsimulator.simulator;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+
+import java.util.Map.Entry;
+
+import lombok.val;
+import org.springframework.stereotype.Component;
+
+@Component
+public class TemplateVariablesReplacer {
+    private static final Gson GSON = new Gson();
+    private static final String OBJECT_KEYWORD_MARK = "#";
+    private static final String ESCAPED_QUOTE = "\"";
+    private static final String STRING_KEYWORD_MARK = ESCAPED_QUOTE + OBJECT_KEYWORD_MARK + "%s" + ESCAPED_QUOTE;
+
+    JsonObject substituteVariables(JsonObject source, JsonObject variables) {
+        var result = source.toString();
+        for (val variable : variables.entrySet()) {
+            result = substituteVariable(result, variable);
+        }
+        return GSON.fromJson(result, JsonObject.class);
+    }
+
+    private String substituteVariable(String sourceAsString, Entry<String, JsonElement> variable) {
+        return sourceAsString.replaceAll(String.format(STRING_KEYWORD_MARK, variable.getKey()), variable.getValue().toString());
+    }
+
+}