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TypeVisitor.java
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TypeVisitor.java
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/*
* Copyright (c) 2023 Contributors to the Eclipse Foundation
* 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.hk2.config.tiger;
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);
}