001package ca.uhn.fhir.util;
002
003/*-
004 * #%L
005 * HAPI FHIR - Core Library
006 * %%
007 * Copyright (C) 2014 - 2022 Smile CDR, Inc.
008 * %%
009 * Licensed under the Apache License, Version 2.0 (the "License");
010 * you may not use this file except in compliance with the License.
011 * You may obtain a copy of the License at
012 *
013 *      http://www.apache.org/licenses/LICENSE-2.0
014 *
015 * Unless required by applicable law or agreed to in writing, software
016 * distributed under the License is distributed on an "AS IS" BASIS,
017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
018 * See the License for the specific language governing permissions and
019 * limitations under the License.
020 * #L%
021 */
022
023import java.util.function.Supplier;
024
025/**
026 * This is used to allow lazy parameter initialization for SLF4j - Hopefully
027 * a future version will allow lambda params
028 */
029public class MessageSupplier {
030    private Supplier<?> supplier;
031
032    public MessageSupplier(Supplier<?> supplier) {
033        this.supplier = supplier;
034    }
035
036    @Override
037    public String toString() {
038        return supplier.get().toString();
039    }
040
041    public static MessageSupplier msg(Supplier<?> supplier) {
042        return new MessageSupplier(supplier);
043    }
044}