[jboss-svn-commits] JBoss Common SVN: r4039 - jbossxb/trunk/src/main/java/org/jboss/xb/util.

[jboss-svn-commits at lists.jboss.org]

Author: alex.loubyansky at jboss.com
Date: 2010-02-17 06:02:33 -0500 (Wed, 17 Feb 2010)
New Revision: 4039

Added:
   jbossxb/trunk/src/main/java/org/jboss/xb/util/CollectionFactory.java
Log:
missed in the previous commit

Added: jbossxb/trunk/src/main/java/org/jboss/xb/util/CollectionFactory.java
===================================================================
--- jbossxb/trunk/src/main/java/org/jboss/xb/util/CollectionFactory.java	                        (rev 0)
+++ jbossxb/trunk/src/main/java/org/jboss/xb/util/CollectionFactory.java	2010-02-17 11:02:33 UTC (rev 4039)
@@ -0,0 +1,105 @@
+/*
+* JBoss, Home of Professional Open Source
+* Copyright 2009, JBoss Inc., and individual contributors as indicated
+* by the @authors tag. See the copyright.txt in the distribution for a
+* full listing of individual contributors.
+*
+* This is free software; you can redistribute it and/or modify it
+* under the terms of the GNU Lesser General Public License as
+* published by the Free Software Foundation; either version 2.1 of
+* the License, or (at your option) any later version.
+*
+* This software is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+* Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public
+* License along with this software; if not, write to the Free
+* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
+*/
+package org.jboss.xb.util;
+
+import java.lang.reflect.Modifier;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Set;
+
+import org.jboss.reflect.spi.ClassInfo;
+import org.jboss.reflect.spi.ConstructorInfo;
+import org.jboss.reflect.spi.TypeInfo;
+import org.jboss.xb.binding.JBossXBRuntimeException;
+
+/**
+ * A CollectionFactory.
+ * 
+ * @author <a href="alex at jboss.com">Alexey Loubyansky</a>
+ * @version $Revision: 1.1 $
+ */
+public abstract class CollectionFactory
+{
+   private static TypeInfo SET_INFO;
+   
+   public abstract Collection<Object> createCollection() throws Throwable;
+   
+   public static CollectionFactory LIST = new CollectionFactory()
+   {
+      public Collection<Object> createCollection() throws Throwable
+      {
+         return new ArrayList<Object>();
+      }      
+   };
+
+   public static CollectionFactory SET = new CollectionFactory()
+   {
+      public Collection<Object> createCollection() throws Throwable
+      {
+         return new HashSet<Object>();
+      }      
+   };
+   
+   public static CollectionFactory getFactory(ClassInfo collectionType)
+   {
+      if (Modifier.isAbstract(collectionType.getModifiers()))
+      {
+         if(SET_INFO == null)
+            SET_INFO = collectionType.getTypeInfoFactory().getTypeInfo(Set.class);
+         if (SET_INFO.isAssignableFrom(collectionType))
+            return SET;
+         else
+            return LIST;
+      }
+
+      ConstructorInfo constructor = collectionType.getDeclaredConstructor(null);
+      if (constructor == null)
+      {
+         for (ConstructorInfo ctor : collectionType.getDeclaredConstructors())
+         {
+            if (ctor.getParameterTypes().length == 0)
+            {
+               // TODO for org.jboss.reflect
+//               log.warn("ClassInfo.getDeclaredConstructor(null) didn't work for " + collectionType.getName()
+//                     + ", found the default ctor in ClassInfo.getDeclaredConstructors()");
+               constructor = ctor;
+               break;
+            }
+         }
+
+         if (constructor == null)
+            throw new JBossXBRuntimeException("Default constructor not found for " + collectionType.getName());
+      }
+
+      final ConstructorInfo ctor = constructor;
+      return new CollectionFactory()
+      {
+         @SuppressWarnings("unchecked")
+         @Override
+         public Collection<Object> createCollection() throws Throwable
+         {
+            return (Collection<Object>) ctor.newInstance(null);
+         }
+      };
+   }
+}