/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.brooklyn.core.typereg;
import org.apache.brooklyn.api.typereg.BrooklynTypeRegistry.RegisteredTypeKind;
/** Visitor adapter which can be used to ensure all kinds are supported
* <p>
* By design this class may have abstract methods added without notification,
* and subclasses will be responsible for providing the implementation in order to ensure compatibility. */
public abstract class RegisteredTypeKindVisitor<T> {
public T visit(RegisteredTypeKind kind) {
if (kind==null) return visitNull();
switch (kind) {
case SPEC: return visitSpec();
case BEAN: return visitBean();
default:
throw new IllegalStateException("Unexpected registered type kind: "+kind);
}
}
protected T visitNull() {
throw new NullPointerException("Registered type kind must not be null");
}
protected abstract T visitSpec();
protected abstract T visitBean();
}