more internal changes and refactorings

Signed-off-by: Ceki Gulcu <[email protected]>

Author: ceki

logback-core/src/main/java/ch/qos/logback/core/model/ModelConstants.java

@@ -24,4 +24,5 @@ public class ModelConstants {
     public static final String INVALID_ATTRIBUTES = "In <property> element, either the \"file\" attribute alone, or "
             + "the \"resource\" element alone, or both the \"name\" and \"value\" attributes must be set.";
 
-}   
+    public static final String PARENT_PROPPERTY_KEY = "parent";
+}

logback-core/src/main/java/ch/qos/logback/core/model/processor/ImplicitModelHandler.java

@@ -23,6 +23,7 @@
 import ch.qos.logback.core.model.ComponentModel;
 import ch.qos.logback.core.model.ImplicitModel;
 import ch.qos.logback.core.model.Model;
+import ch.qos.logback.core.model.ModelConstants;
 import ch.qos.logback.core.spi.ContextAware;
 import ch.qos.logback.core.spi.LifeCycle;
 import ch.qos.logback.core.util.AggregationType;
@@ -33,8 +34,7 @@ public class ImplicitModelHandler extends ModelHandlerBase {
 
     private final BeanDescriptionCache beanDescriptionCache;
     private ImplicitModelData implicitModelData;
-    
-    static final String PARENT_PROPPERTY_KEY = "parent";
+
     static public final String IGNORING_UNKNOWN_PROP = "Ignoring unknown property";
 
     boolean inError = false;
@@ -196,8 +196,8 @@ private void postHandleComplex(ModelInterpretationContext mic, Model model,
         nestedBean.setContext(context);
 
         // have the nested element point to its parent if possible
-        if (nestedBean.computeAggregationType(PARENT_PROPPERTY_KEY) == AggregationType.AS_COMPLEX_PROPERTY) {
-            nestedBean.setComplexProperty(PARENT_PROPPERTY_KEY, imdComplex.parentBean.getObj());
+        if (nestedBean.computeAggregationType(ModelConstants.PARENT_PROPPERTY_KEY) == AggregationType.AS_COMPLEX_PROPERTY) {
+            nestedBean.setComplexProperty(ModelConstants.PARENT_PROPPERTY_KEY, imdComplex.parentBean.getObj());
         }
 
         // start the nested complex property if it implements LifeCycle and is not