aoqi@0: /*
aoqi@0:  * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: package com.sun.xml.internal.bind.v2.util;
aoqi@0: 
aoqi@0: import java.util.Map;
aoqi@0: 
aoqi@0: /**
aoqi@0:  * @author Kohsuke Kawaguchi
aoqi@0:  */
aoqi@0: public class TypeCast {
aoqi@0:     /**
aoqi@0:      * Makes sure that a map contains the right type, and returns it to the desirable type.
aoqi@0:      */
aoqi@0:     public static <K,V> Map<K,V> checkedCast( Map<?,?> m, Class<K> keyType, Class<V> valueType ) {
aoqi@0:         if(m==null)
aoqi@0:             return null;
aoqi@0:         for (Map.Entry e : m.entrySet()) {
aoqi@0:             if(!keyType.isInstance(e.getKey()))
aoqi@0:                 throw new ClassCastException(e.getKey().getClass().toString());
aoqi@0:             if(!valueType.isInstance(e.getValue()))
aoqi@0:                 throw new ClassCastException(e.getValue().getClass().toString());
aoqi@0:         }
aoqi@0:         return (Map<K,V>)m;
aoqi@0:     }
aoqi@0: }