Array Converter
/**
*
* LibFormula : a free Java formula library
*
*
* Project Info: http://reporting.pentaho.org/libformula/
*
* (C) Copyright 2006-2007, by Pentaho Corporation and Contributors.
*
* This library 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 library 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
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
*
* ------------
* $Id: ArrayConverter.java 3521 2007-10-16 10:55:14Z tmorgner $
* ------------
* (C) Copyright 2006-2007, by Pentaho Corporation.
*/
import java.util.ArrayList;
import java.util.List;
import java.lang.reflect.Array;
/**
* Creation-Date: 08.10.2006, 17:37:50
*
* @author Thomas Morgner
*/
public class ArrayConverter
{
private ArrayConverter()
{
}
public static Object[] getAsList(final Object maybeArray,
final Class arrayType)
{
if (maybeArray == null)
{
return null;
}
if (maybeArray.getClass().isArray() == false)
{
return new Object[]{maybeArray};
}
final ArrayList list = new ArrayList();
ArrayConverter.addToList(list, maybeArray);
final Object o = Array.newInstance(arrayType, list.size());
return list.toArray((Object[]) o);
}
private static void addToList (final List list, final Object array)
{
final int length = Array.getLength(array);
for (int i = 0; i < length; i++)
{
final Object value = Array.get(array, i);
if (value == null)
{
list.add(null);
continue;
}
if (value.getClass().isArray() == false)
{
list.add(value);
continue;
}
ArrayConverter.addToList(list, value);
}
}
/**
* @param maybeArray
* @param dimensions
* @return
*/
public static Object[] getArray(final Object maybeArray,
final Class arrayType,
final int dims)
{
if (maybeArray == null)
{
return null;
}
if (dims <= 0)
{
return null;
}
if (maybeArray.getClass().isArray() == false)
{
Object object = maybeArray;
for (int i = 0; i < dims; i++)
{
final Object[] array = (Object[]) Array.newInstance(arrayType, 1);
array[0] = object;
object = array;
}
return (Object[]) object;
}
if (ArrayConverter.getDimensionCount(maybeArray.getClass()) < dims)
{
return null;
}
return (Object[]) maybeArray;
}
public static int getDimensionCount(Class arrayClass)
{
int count = 0;
while (arrayClass != null && arrayClass.isArray())
{
count += 1;
arrayClass = arrayClass.getComponentType();
}
return count;
}
}
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