GWT implementation of the serializer

java/com.sap.sse.gwt/src/com/sap/sse/gwt/Settings.gwt.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE module PUBLIC "-//Google Inc.//DTD Google Web Toolkit 2.7.0//EN" "http://gwtproject.org/doctype/2.7.0/gwt-module.dtd">
+<module>
+	<inherits name='com.google.gwt.user.User' />
+	<source path="settings" />
+</module>

java/com.sap.sse.gwt/src/com/sap/sse/gwt/settings/SettingsToJsonSerializerGWT.java

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+package com.sap.sse.gwt.settings;
+
+import java.util.ArrayList;
+
+import com.google.gwt.json.client.JSONArray;
+import com.google.gwt.json.client.JSONBoolean;
+import com.google.gwt.json.client.JSONNumber;
+import com.google.gwt.json.client.JSONObject;
+import com.google.gwt.json.client.JSONString;
+import com.google.gwt.json.client.JSONValue;
+import com.sap.sse.common.settings.serializer.AbstractSettingsToJsonSerializer;
+
+/**
+ * This is a GWT implementation of an {@link AbstractSettingsToJsonSerializer} that uses the json api library available
+ * on the client side.
+ *
+ */
+public class SettingsToJsonSerializerGWT extends AbstractSettingsToJsonSerializer<JSONObject, JSONArray> {
+    @Override
+    protected JSONObject newOBJECT() {
+        return new JSONObject();
+    }
+
+    @Override
+    protected void set(JSONObject jsonObject, String property, Object value) {
+
+        if (value instanceof String) {
+            jsonObject.put(property, new JSONString((String) value));
+        } else if (value instanceof Number) {
+            jsonObject.put(property, new JSONNumber(((Number) value).doubleValue()));
+        } else if (value instanceof Boolean) {
+            jsonObject.put(property, JSONBoolean.getInstance((Boolean) value));
+        }
+
+    }
+
+    @Override
+    protected Object get(JSONObject jsonObject, String property) {
+        return jsonObject.get(property);
+    }
+
+    @Override
+    protected boolean hasProperty(JSONObject jsonObject, String property) {
+        return jsonObject.containsKey(property);
+    }
+
+    @Override
+    protected JSONArray ToJsonArray(Iterable<Object> values) {
+        JSONArray jsonArray = new JSONArray();
+        for (Object value : values) {
+            JSONValue jsonValue = null;
+            if (value instanceof String) {
+                jsonValue = new JSONString((String) value);
+            } else if (value instanceof Number) {
+                jsonValue = new JSONNumber(((Number) value).doubleValue());
+            } else if (value instanceof Boolean) {
+                jsonValue = JSONBoolean.getInstance((Boolean) value);
+            }
+            if (jsonValue != null) {
+                jsonArray.set(jsonArray.size(), jsonValue);
+            }
+        }
+        return jsonArray;
+    }
+
+    @Override
+    protected Iterable<Object> fromJsonArray(JSONArray jsonArray) {
+        final ArrayList<Object> result = new ArrayList<Object>(jsonArray.size());
+        toLoop: for (int i = 0; i < jsonArray.size(); i++) {
+            JSONValue jsonValue = jsonArray.get(i);
+            JSONString jS;
+            if ((jS = jsonValue.isString()) != null) {
+                result.add(jS.stringValue());
+                continue toLoop;
+            }
+            JSONBoolean jB;
+            if ((jB = jsonValue.isBoolean()) != null) {
+                result.add(jB.booleanValue());
+                continue toLoop;
+            }
+            JSONNumber jN;
+            if ((jN = jsonValue.isNumber()) != null) {
+                result.add(jN.doubleValue());
+                continue toLoop;
+            }
+        }
+        return result;
+    }
+}