Glassfish example source code file (ArrayConversion.java)

This example Glassfish source code file (ArrayConversion.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Glassfish tags/keywords

arrayconversion, boolean, byte, character, character, class, class, double, double, float, integer, object, object, reflection, short

The Glassfish ArrayConversion.java source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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 *
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 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.enterprise.admin.util;

import java.lang.reflect.Array;

/*
	Provides methods to convert arrays of primitive types to corresponding
	arrays of Object types.
 */
public final class ArrayConversion
{
		private
	ArrayConversion( )
	{
		// disallow instantiation
	}
	
		private static Object []
	convert( Object simpleArray )
	{
		final String className	= simpleArray.getClass().getName();
		
		//final String	memberClassName	= ClassUtil.getArrayMemberClassName( className );
		
		final Class		theClass = ClassUtil.getArrayElementClass( simpleArray.getClass() );
		
		final int numItems	= Array.getLength( simpleArray );
		
		final Class elementClass	= ClassUtil.PrimitiveClassToObjectClass( theClass );
		
		final Object []	result	= (Object [])Array.newInstance( elementClass, numItems );
		
		for( int i = 0; i < numItems; ++i )
		{
			result[ i ]	= Array.get( simpleArray, i );
		}
		
		return( result );
	}
	
		public static Object []
	toAppropriateType( Object array)
	{
		return( (Object [])convert( array ) );
	}
	
	
		public static Boolean []
	toBooleans( boolean [] array )
	{
		return( (Boolean [])convert( array ) );
	}
	
		public static Character []
	toCharacters( char [] array )
	{
		return( (Character [])convert( array ) );
	}
	
		public static Byte []
	toBytes( byte [] array )
	{
		return( (Byte [])convert( array ) );
	}
	
		public static Short []
	toShorts( short [] array )
	{
		return( (Short [])convert( array ) );
	}
	
		public static Integer []
	toIntegers( int [] array )
	{
		return( (Integer [])convert( array ) );
	}
	
		public static Long []
	toLongs( long [] array )
	{
		return( (Long [])convert( array ) );
	}
	
		public static Float []
	toFloats( float [] array )
	{
		return( (Float [])convert( array ) );
	}
	
		public static Double []
	toDoubles( double [] array )
	{
		return( (Double [])convert( array ) );
	}
	
	
		public static Object []
	createObjectArrayType( final Class elementType, final int size )
		throws Exception
	{
		final Object [] result	= (Object []) Array.newInstance( elementType, size );
		
		return( result );
	}
	
		
		public static java.util.Set
	toSet( Object []	array )
	{
		java.util.Set	theSet	= null;
		if ( array.length == 0 )
		{
			theSet	= java.util.Collections.EMPTY_SET;
		}
		else if ( array.length == 1 )
		{
			theSet	= java.util.Collections.singleton( array[ 0 ] );
		}
		else
		{
			theSet	= new java.util.HashSet();
			for( int i = 0; i < array.length; ++i )
			{
				theSet.add( array[ i ] );
			}
		}
		return( theSet );
	}
	
	
		public static Object []
	setToArray( final java.util.Set s )
	{
		final java.util.Iterator	iter	= s.iterator();
		
		final Object []	out	= new Object [ s.size() ];
		
		return( setToArray( s, out ) );
	}
	
		public static Object []
	setToArray( final java.util.Set s, Object []	out )
	{
		final java.util.Iterator	iter	= s.iterator();
		
		if ( out.length != s.size() )
		{
			throw new IllegalArgumentException();
		}
		
		int	i = 0;
		while ( iter.hasNext() )
		{
			out[ i ]	= iter.next();
			++i;
		}
		
		return( out );
	}
}