bug5774: mainly fixed the implementation so that no exception occurs any more when using the new secured settings.

- Added a new documentation page under HowTo -> Development -> Secured Settings
- Cleaned up some RaceMapSetting initializations by using the newly introduced builder
- Added a PaywallResolverProxy
- Used the PaywallResolverProxy and SecuredDTOProxy to make it possible to add the underlying objects to a later time
- Refactored some field naming, especially the name of setting fields
- Changed the getValue() method of a setting to return the default value if value is null (background was the casting of NULL values to atomar return parameters like boolean or int, also a default value was set)
- Added a setValue method without permission check to be used for reset to default method, which will not be overwritten by other implementations of the AbstractValueSetting, which causes some exceptions before.
- Added log messages if a value of an secured value setting is used without paywall resolver or secured DTO

java/com.sap.sse.common/src/com/sap/sse/common/settings/generic/AbstractGenericSerializableSettings.java

@@ -140,13 +140,11 @@ public abstract class AbstractGenericSerializableSettings extends AbstractSettin
      * 
      */
     protected abstract void addChildSettings();
-    
-    // TODO make protected
+
     public Value getValue(String settingName) {
         return value.getValue(settingName);
     }
-    
-    // TODO make protected
+
     public void setValue(String settingName, Value value) {
         this.value.setValue(settingName, value);
     }

java/com.sap.sse.common/src/com/sap/sse/common/settings/generic/base/AbstractValueSetting.java

@@ -16,18 +16,26 @@ public abstract class AbstractValueSetting<T> extends AbstractHasValueSetting<T>
             resetToDefault();
         }
     }
-    
+
     @Override
     public T getValue() {
+        T result = null;
         Value value = settings.getValue(settingName);
-        if (value == null) {
-            return null;
+        if (value != null) {
+            result = getValueConverter().fromValue(value);
         }
-        return getValueConverter().fromValue(value);
+        if (result == null) {
+            result = defaultValue;
+        }
+        return result;
     }
 
     @Override
     public void setValue(T value) {
+        setValueWithoutPermittionCheck(value);
+    }
+
+    private void setValueWithoutPermittionCheck(T value) {
         settings.setValue(settingName, getValueConverter().toValue(value));
     }
 
@@ -46,7 +54,8 @@ public abstract class AbstractValueSetting<T> extends AbstractHasValueSetting<T>
     
     @Override
     public void resetToDefault() {
-        this.setValue(defaultValue);
+        //setValue(defaultValue);
+        setValueWithoutPermittionCheck(defaultValue);
     }
     
     @Override