| /* |
| * Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0, which is available at |
| * http://www.eclipse.org/legal/epl-2.0. |
| * |
| * This Source Code may also be made available under the following Secondary |
| * Licenses when the conditions for such availability set forth in the |
| * Eclipse Public License v. 2.0 are satisfied: GNU General Public License, |
| * version 2 with the GNU Classpath Exception, which is available at |
| * https://www.gnu.org/software/classpath/license.html. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 |
| */ |
| |
| package org.jvnet.tiger_types; |
| |
| import java.lang.reflect.Type; |
| import java.lang.reflect.ParameterizedType; |
| import java.lang.reflect.GenericArrayType; |
| import java.lang.reflect.WildcardType; |
| import java.lang.reflect.TypeVariable; |
| |
| /** |
| * @author Kohsuke Kawaguchi |
| */ |
| abstract class TypeVisitor<T,P> { |
| public final T visit( Type t, P param ) { |
| assert t!=null; |
| |
| if (t instanceof Class) |
| return onClass((Class)t,param); |
| if (t instanceof ParameterizedType) |
| return onParameterizdType( (ParameterizedType)t,param); |
| if(t instanceof GenericArrayType) |
| return onGenericArray((GenericArrayType)t,param); |
| if(t instanceof WildcardType) |
| return onWildcard((WildcardType)t,param); |
| if(t instanceof TypeVariable) |
| return onVariable((TypeVariable)t,param); |
| |
| // covered all the cases |
| assert false; |
| throw new IllegalArgumentException(); |
| } |
| |
| protected abstract T onClass(Class c, P param); |
| protected abstract T onParameterizdType(ParameterizedType p, P param); |
| protected abstract T onGenericArray(GenericArrayType g, P param); |
| protected abstract T onVariable(TypeVariable v, P param); |
| protected abstract T onWildcard(WildcardType w, P param); |
| } |