Added ConfigUpdater.java

src/main/java/com/hms_networks/americas/sc/extensions/config/ConfigUpdater.java

@@ -0,0 +1,72 @@
+package com.hms_networks.americas.sc.extensions.config;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+
+import com.hms_networks.americas.sc.extensions.json.JSONException;
+import com.hms_networks.americas.sc.extensions.json.JSONObject;
+
+public class ConfigUpdater {
+
+    private JSONObject config;
+    private ArrayList steps;
+    private String applicationJsonKey;
+    private String configVersionJsonKey;
+
+    public ConfigUpdater(JSONObject config, String applicationJsonKey, String configVersionJsonKey)
+    {
+        this.config = config;
+        steps = new ArrayList();
+        this.applicationJsonKey = applicationJsonKey;
+        this.configVersionJsonKey = configVersionJsonKey;
+    }
+
+    public JSONObject getConfig(){
+        return config;
+    }
+
+    private ConfigFileVersion getConfigFileVersion(){
+        String versionString;
+        try {
+            versionString = config.getJSONObject(applicationJsonKey).getString(configVersionJsonKey);
+        } catch (JSONException e) {
+            versionString = "0.0.0";
+        }
+        return new ConfigFileVersion(versionString);
+    }
+
+    private void setConfigFileVersion(ConfigFileVersion version){
+        try {
+            config.getJSONObject(applicationJsonKey).put(configVersionJsonKey, version.getVersionString());
+        } catch (JSONException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public void addStep(ConfigFileUpdateStep step){
+        steps.add(step);
+    }
+
+    public boolean updateConfig(){
+        boolean success = true;
+        Collections.sort(steps);
+        for (int i = 0; i < steps.size(); i++){
+            ConfigFileUpdateStep step = (ConfigFileUpdateStep) steps.get(i);
+            if (step.isCompatibleWithVersion(getConfigFileVersion())){
+                success = success && step.updateConfig(config);
+                if (success){
+                    setConfigFileVersion(step.getStepVersion());
+                }
+                else {
+                    break;
+                }
+            }
+            else {
+                success = false;
+                break;
+            }
+        }
+        return success;
+    }
+}