| /* |
| * 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.util.guava; |
| |
| import javax.annotation.Nullable; |
| |
| import com.google.common.reflect.TypeToken; |
| |
| public class TypeTokens { |
| |
| /** returns raw type, if it's raw, else null; |
| * used e.g. to set only one of the raw type or the type token, |
| * for instance to make serialized output nicer */ |
| @Nullable |
| public static <T> Class<? super T> getRawTypeIfRaw(@Nullable TypeToken<T> type) { |
| if (type==null || !type.equals(TypeToken.of(type.getRawType()))) { |
| return null; |
| } else { |
| return type.getRawType(); |
| } |
| } |
| |
| /** returns null if it's raw, else the type token */ |
| @Nullable |
| public static <T> TypeToken<T> getTypeTokenIfNotRaw(@Nullable TypeToken<T> type) { |
| if (type==null || type.equals(TypeToken.of(type.getRawType()))) { |
| return null; |
| } else { |
| return type; |
| } |
| } |
| |
| /** given either a token or a raw type, returns the raw type */ |
| public static <T> Class<? super T> getRawType(TypeToken<T> token, Class<? super T> raw) { |
| if (raw!=null) return raw; |
| if (token!=null) return token.getRawType(); |
| throw new IllegalStateException("Both indicators of type are null"); |
| } |
| |
| |
| /** given either a token or a raw type, returns the token */ |
| @SuppressWarnings("unchecked") |
| public static <T> TypeToken<T> getTypeToken(TypeToken<T> token, Class<? super T> raw) { |
| if (token!=null) return token; |
| if (raw!=null) return TypeToken.of((Class<T>)raw); |
| throw new IllegalStateException("Both indicators of type are null"); |
| } |
| |
| /** gets the Class<T> object from a token; normal methods return Class<? super T> which may technically be correct |
| * with generics but this sloppily but handily gives you Class<T> which is usually what you have anyway */ |
| @SuppressWarnings({ "rawtypes", "unchecked" }) |
| public static <T> Class<T> getRawRawType(TypeToken<T> token) { |
| return (Class)token.getRawType(); |
| } |
| |
| } |