/*
* Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.xml.internal.bind.v2.util;
import java.util.Map;
/**
* @author Kohsuke Kawaguchi
*/
public class TypeCast {
/**
* Makes sure that a map contains the right type, and returns it to the desirable type.
*/
public static <K,V> Map<K,V> checkedCast( Map<?,?> m, Class<K> keyType, Class<V> valueType ) {
if(m==null)
return null;
for (Map.Entry e : m.entrySet()) {
if(!keyType.isInstance(e.getKey()))
throw new ClassCastException(e.getKey().getClass().toString());
if(!valueType.isInstance(e.getValue()))
throw new ClassCastException(e.getValue().getClass().toString());
}
return (Map<K,V>)m;
}
}