/* * Copyright (C) 2013 The Guava Authors * * Licensed 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.jdbi.v3.core.generic.internal; import javax.annotation.concurrent.NotThreadSafe; import java.lang.reflect.GenericArrayType; import java.lang.reflect.ParameterizedType; import java.lang.reflect.Type; import java.lang.reflect.TypeVariable; import java.lang.reflect.WildcardType; import java.util.HashSet; import java.util.Set; @NotThreadSafe abstract class TypeVisitor { private final Set<Type> visited = new HashSet<>(); public final void visit(Type... types) { for (Type type : types) { if (type == null || !visited.add(type)) { // null owner type, or already visited; continue; } boolean succeeded = false; try { if (type instanceof TypeVariable) { visitTypeVariable((TypeVariable<?>) type); } else if (type instanceof WildcardType) { visitWildcardType((WildcardType) type); } else if (type instanceof ParameterizedType) { visitParameterizedType((ParameterizedType) type); } else if (type instanceof Class) { visitClass((Class<?>) type); } else if (type instanceof GenericArrayType) { visitGenericArrayType((GenericArrayType) type); } else { throw new AssertionError("Unknown type: " + type); } succeeded = true; } finally { if (!succeeded) { // When the visitation failed, we don't want to ignore the second. visited.remove(type); } } } } void visitClass(Class<?> t) {} void visitGenericArrayType(GenericArrayType t) {} void visitParameterizedType(ParameterizedType t) {} void visitTypeVariable(TypeVariable<?> t) {} void visitWildcardType(WildcardType t) {} }