001/* 002 * Licensed to DuraSpace under one or more contributor license agreements. 003 * See the NOTICE file distributed with this work for additional information 004 * regarding copyright ownership. 005 * 006 * DuraSpace licenses this file to you under the Apache License, 007 * Version 2.0 (the "License"); you may not use this file except in 008 * compliance with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018package org.fcrepo.kernel.modeshape.utils; 019 020import java.util.function.Predicate; 021 022import javax.jcr.RepositoryException; 023 024import org.fcrepo.kernel.api.exception.RepositoryRuntimeException; 025 026/** 027 * Operations that throw {@link RepositoryException} cannot be used as lambdas without "unchecking" those exceptions. 028 * 029 * @author ajs6f 030 * @param <T> the type of the input to the predicate 031 */ 032@FunctionalInterface 033public interface UncheckedPredicate<T> extends Predicate<T> { 034 035 @Override 036 default boolean test(final T elem) { 037 try { 038 return testThrows(elem); 039 } catch (final RepositoryException e) { 040 throw new RepositoryRuntimeException(e); 041 } 042 } 043 044 /** 045 * The same semantic as {@link #test(Object)}, but allowed to throw a {@link RepositoryException} 046 * 047 * @param elem the input argument 048 * @return true if the input matches the predicate, otherwise false 049 * @throws RepositoryException a repository-related exception 050 */ 051 boolean testThrows(T elem) throws RepositoryException; 052 053 /** 054 * @param <T> the type of the input to the predicate 055 * @param p a lambda expression 056 * @return an unchecked version of that lambda 057 */ 058 static <T> UncheckedPredicate<T> uncheck(final UncheckedPredicate<T> p) { 059 return p; 060 } 061}