cleanup / abuse system fix / prepping for a release

[mir.git] / source / mir / entity / adapter / EntityAdapter.java

diff --git a/source/mir/entity/adapter/EntityAdapter.java b/source/mir/entity/adapter/EntityAdapter.java
index e223981..e0ab7be 100755 (executable)
--- a/source/mir/entity/adapter/EntityAdapter.java
+++ b/source/mir/entity/adapter/EntityAdapter.java
@@ -29,17 +29,23 @@
  */
 package mir.entity.adapter;
 
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.Iterator;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-
 import mir.entity.Entity;
 import mir.util.CachingRewindableIterator;
-
-public class EntityAdapter implements Map {
+import mir.util.RewindableIterator;
+
+import java.util.*;
+
+/** An EntityAdapter is a wrapper around an Entity meant to add
+ * missing functionality. It provides "calculated fields" 
+ * which mir installations can extend reasonably easilly.
+ * "calculated fields" compute values that are not directly present
+ * in the db table. For example:  
+ * a field to have the number of comments associated with an article;
+ * a field to get the list of hidden comments associated with an article;
+ * etc.
+ * <p>This whole framework is meant to be replaced by hibernate</p>
+ */
+public class EntityAdapter {
   private Entity entity;
   private EntityAdapterDefinition definition;
   private Map calculatedFieldsCache;
@@ -52,25 +58,18 @@ public class EntityAdapter implements Map {
     model = aModel;
   }
 
-  public boolean containsKey(Object aKey) {
-    try {
-      if (aKey instanceof String)
-        return     entity.hasField((String) aKey)
-                || definition.hasCalculatedField((String) aKey);
-    }
-    catch (Throwable t) {
-    }
-
-    return false;
-  }
-
   public boolean equals(Object anObject) {
     return        anObject instanceof EntityAdapter
            && ((EntityAdapter) anObject).entity.equals(entity);
   }
 
   public int hashCode() {
-    return entity.hashCode();
+    if (entity!=null) {
+      return entity.hashCode();
+    }
+    else {
+      return 0;
+    }
   }
 
   public Entity getEntity() {
@@ -81,7 +80,7 @@ public class EntityAdapter implements Map {
     return model;
   }
 
-  public Object get(Object aKey) {
+  public Object get(String aKey) {
     Object result;
 
     if (calculatedFieldsCache.containsKey(aKey)) {
@@ -93,52 +92,30 @@ public class EntityAdapter implements Map {
 
       return result;
     }
-    else if (aKey instanceof String) {
-      return entity.getFieldValue((String) aKey);
-    }
     else {
-      return null;
+      return entity.getFieldValue((String) aKey);
     }
   }
 
-  public boolean isEmpty() {
-    return false;
-  }
-
-  public Set keySet() {
-    throw new UnsupportedOperationException("EntityAdapter.keySet()");
-  }
-
-  public Object put(Object aKey, Object value) {
-    throw new UnsupportedOperationException("EntityAdapter.put()");
-  }
-
-  public void putAll(Map t) {
-    throw new UnsupportedOperationException("EntityAdapter.putAll()");
-  }
-
-  public Object remove(Object aKey) {
-    throw new UnsupportedOperationException("EntityAdapter.remove()");
-  }
-
-  public int size() {
-    throw new UnsupportedOperationException("EntityAdapter.size()");
-  }
-
-  public Collection values() {
-    throw new UnsupportedOperationException("EntityAdapter.values()");
-  }
-
-  public void clear() {
-    throw new UnsupportedOperationException("EntityAdapter.clear()");
-  }
-
-  public boolean containsValue(Object value) {
-    throw new UnsupportedOperationException("EntityAdapter.containsValue()");
-  }
+  public Iterator getIterator(String aKey) {
+    Object result = get(aKey);
 
-  public Set entrySet() {
-    throw new UnsupportedOperationException("EntityAdapter.entrySet()");
+    if (result instanceof RewindableIterator) {
+      ((RewindableIterator) result).rewind();
+      return (RewindableIterator) result;
+    }
+    else if (result instanceof Iterator) {
+      return (Iterator) result;
+    }
+    else if (result instanceof Collection) {
+      return ((Collection) result).iterator();
+    }
+    else if (result!=null) {
+      return Collections.singletonList(result).iterator();
+    }
+    else {
+      return null;
+    }
   }
 
   public Object getComplexRelation(String aMainTablePrefix, List someExtraTables,
@@ -157,12 +134,9 @@ public class EntityAdapter implements Map {
   }
 
 
-  public Object getRelation(String aWhereClause, String anOrderByClause, String aDefinition) {
+  public List getRelation(String aWhereClause, String anOrderByClause, String aDefinition) {
     try {
-      return
-          new CachingRewindableIterator(
-            new EntityIteratorAdapter(
-                aWhereClause, anOrderByClause, -1, getModel(), aDefinition));
+      return EntityAdapterEngine.retrieveAdapterList(model, aDefinition, aWhereClause, anOrderByClause, -1, 0);
     }
     catch (Throwable t) {
       throw new RuntimeException(t.getMessage());
@@ -171,15 +145,30 @@ public class EntityAdapter implements Map {
 
   public EntityAdapter getToOneRelation(String aWhereClause, String anOrderByClause, String aDefinition) {
     try {
-      Iterator i = new EntityIteratorAdapter(aWhereClause, anOrderByClause, -1, getModel(), aDefinition);
+      Iterator i = new EntityIteratorAdapter(aWhereClause, anOrderByClause, 1, getModel(), aDefinition, 1, 0);
 
       if (i.hasNext())
         return (EntityAdapter) i.next();
-      else
-        return null;
+                       return null;
     }
     catch (Throwable t) {
       throw new RuntimeException(t.getMessage());
     }
   }
+
+  public EntityAdapter getComplexToOneRelation(String aMainTablePrefix, List someExtraTables,
+                                               String aWhereClause, String anOrderByClause, String aDefinition) {
+    try {
+      Iterator i = new EntityIteratorAdapter(aMainTablePrefix, someExtraTables, aWhereClause, anOrderByClause, -1,
+          getModel(), aDefinition, 1, 0);
+
+      if (i.hasNext())
+        return (EntityAdapter) i.next();
+                       return null;
+    }
+    catch (Throwable t) {
+      throw new RuntimeException(t.getMessage());
+    }
+  }
+
 }
\ No newline at end of file