1 /* 2 * Copyright 2020 Google LLC 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package io.perfmark; 18 19 /** 20 * This interface is equivalent to {@code java.util.function.Function}. It is here as a 21 * compatibility shim to make PerfMark compatible with Java 6. This will likely be removed if 22 * PerfMark picks Java 8 as the minimum support version. See {@link PerfMark} for expected usage. 23 * 24 * @since 0.22.0 25 * @param <T> The type to turn into a String. 26 */ 27 public interface StringFunction<T> { 28 29 /** 30 * Takes the given argument and produces a String. 31 * 32 * @since 0.22.0 33 * @param t the subject to Stringify 34 * @return the String 35 */ apply(T t)36 String apply(T t); 37 } 38