--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/gov/nasa/jpf/vm/DefaultFieldsFactory.java	Fri Jan 23 10:14:01 2015 -0800
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2014, United States Government, as represented by the
+ * Administrator of the National Aeronautics and Space Administration.
+ * All rights reserved.
+ *
+ * The Java Pathfinder core (jpf-core) platform is licensed under the
+ * Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ * 
+ *        http://www.apache.org/licenses/LICENSE-2.0. 
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and 
+ * limitations under the License.
+ */
+package gov.nasa.jpf.vm;
+
+import gov.nasa.jpf.JPFException;
+
+/**
+ * our concrete Fields factory (representing the default JPF object model)
+ */
+public class DefaultFieldsFactory implements FieldsFactory {
+
+  @Override
+  public Fields createInstanceFields (ClassInfo ci) {
+    return new NamedFields(ci.getInstanceDataSize());
+  }
+
+  @Override
+  public Fields createStaticFields (ClassInfo ci) {
+    return new NamedFields(ci.getStaticDataSize());
+  }
+
+  @Override
+  public Fields createArrayFields (String type, ClassInfo ci, int nElements, int typeSize, boolean isReferenceArray) {
+    char t = type.charAt(1);
+    switch (t){
+      case 'Z': return new BooleanArrayFields(nElements);
+      case 'B': return new ByteArrayFields(nElements);
+      case 'C': return new CharArrayFields(nElements);
+      case 'S': return new ShortArrayFields(nElements);
+      case 'I': return new IntArrayFields(nElements);
+      case 'J': return new LongArrayFields(nElements);
+      case 'F': return new FloatArrayFields(nElements);
+      case 'D': return new DoubleArrayFields(nElements);
+      case 'L':
+      case '[':
+        return new ReferenceArrayFields(nElements);
+      default:
+        throw new JPFException("unknown array type: " + type);
+    }
+  }
+}