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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. 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
* http://www.netbeans.org/cddl-gplv2.html
* or nbbuild/licenses/CDDL-GPL-2-CP. 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
* nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the
* License Header, with the fields enclosed by brackets [] replaced by
* your own identifying information:
* "Portions Copyrighted [year] [name of copyright owner]"
*
* Contributor(s):
*
* The Original Software is NetBeans. The Initial Developer of the Original
* Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
* Microsystems, Inc. All Rights Reserved.
*
* 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 do not 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.
*/
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
/**
* @since 4.37
* @author Jaroslav Tulach
*/
public class Utils {
/**
* Create a typesafe copy of a raw map.
* @param rawMap an unchecked map
* @param keyType the desired supertype of the keys
* @param valueType the desired supertype of the values
* @param strict true to throw a <code>ClassCastException</code> if the raw map has an invalid key or value,
* false to skip over such map entries (warnings may be logged)
* @return a typed map guaranteed to contain only keys and values assignable
* to the named types (or they may be null)
* @throws ClassCastException if some key or value in the raw map was not well-typed, and only if <code>strict</code> was true
*/
public static <K,V> Map<K,V> checkedMapByCopy(Map rawMap, Class<K> keyType, Class<V> valueType, boolean strict) throws ClassCastException {
Map<K,V> m2 = new HashMap<K,V>(rawMap.size() * 4 / 3 + 1);
Iterator it = rawMap.entrySet().iterator();
while (it.hasNext()) {
Map.Entry e = (Map.Entry) it.next();
try {
m2.put(keyType.cast(e.getKey()), valueType.cast(e.getValue()));
} catch (ClassCastException x) {
if (strict) {
throw x;
} else {
System.out.println("not assignable");
}
}
}
return m2;
}
}
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