org.glassfish.jaxb.runtime.v2.util.TypeCast Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2022 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0, which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package org.glassfish.jaxb.runtime.v2.util;
import java.util.Map;
/**
* @author Kohsuke Kawaguchi
*/
public class TypeCast {
/**
* Private constructor.
*/
private TypeCast() {}
/**
* Makes sure that a map contains the right type, and returns it to the desirable type.
*/
@SuppressWarnings({"unchecked"})
public static Map checkedCast( Map m, Class keyType, Class 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)m;
}
}