1b0383884fa44aa649cabb706325e922ee167c94aBen Gruver/* 2b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * Copyright 2012, Google Inc. 3b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * All rights reserved. 4b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * 5b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * Redistribution and use in source and binary forms, with or without 6b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * modification, are permitted provided that the following conditions are 7b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * met: 8b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * 9b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * * Redistributions of source code must retain the above copyright 10b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * notice, this list of conditions and the following disclaimer. 11b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * * Redistributions in binary form must reproduce the above 12b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * copyright notice, this list of conditions and the following disclaimer 13b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * in the documentation and/or other materials provided with the 14b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * distribution. 15b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * * Neither the name of Google Inc. nor the names of its 16b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * contributors may be used to endorse or promote products derived from 17b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * this software without specific prior written permission. 18b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * 19b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29b0383884fa44aa649cabb706325e922ee167c94aBen Gruver * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30b0383884fa44aa649cabb706325e922ee167c94aBen Gruver */ 31b0383884fa44aa649cabb706325e922ee167c94aBen Gruver 32b0383884fa44aa649cabb706325e922ee167c94aBen Gruverpackage org.jf.util; 33b0383884fa44aa649cabb706325e922ee167c94aBen Gruver 34b0383884fa44aa649cabb706325e922ee167c94aBen Gruverimport com.google.common.collect.ImmutableList; 3522c3185bb7c8618437eabe6c597549e0989ec4e6Ben Gruverimport com.google.common.collect.ImmutableSet; 362d7e1111358e2b8cc951a46dc8b0217a7fa0deadBen Gruverimport com.google.common.collect.ImmutableSortedSet; 37b0383884fa44aa649cabb706325e922ee167c94aBen Gruver 38b0383884fa44aa649cabb706325e922ee167c94aBen Gruverimport javax.annotation.Nonnull; 39b0383884fa44aa649cabb706325e922ee167c94aBen Gruverimport javax.annotation.Nullable; 40b0383884fa44aa649cabb706325e922ee167c94aBen Gruver 412d7e1111358e2b8cc951a46dc8b0217a7fa0deadBen Gruverpublic class ImmutableUtils { 42b0383884fa44aa649cabb706325e922ee167c94aBen Gruver @Nonnull public static <T> ImmutableList<T> nullToEmptyList(@Nullable ImmutableList<T> list) { 43b0383884fa44aa649cabb706325e922ee167c94aBen Gruver if (list == null) { 44b0383884fa44aa649cabb706325e922ee167c94aBen Gruver return ImmutableList.of(); 45b0383884fa44aa649cabb706325e922ee167c94aBen Gruver } 46b0383884fa44aa649cabb706325e922ee167c94aBen Gruver return list; 47b0383884fa44aa649cabb706325e922ee167c94aBen Gruver } 482d7e1111358e2b8cc951a46dc8b0217a7fa0deadBen Gruver 4922c3185bb7c8618437eabe6c597549e0989ec4e6Ben Gruver @Nonnull public static <T> ImmutableSet<T> nullToEmptySet(@Nullable ImmutableSet<T> set) { 5022c3185bb7c8618437eabe6c597549e0989ec4e6Ben Gruver if (set == null) { 5122c3185bb7c8618437eabe6c597549e0989ec4e6Ben Gruver return ImmutableSet.of(); 5222c3185bb7c8618437eabe6c597549e0989ec4e6Ben Gruver } 5322c3185bb7c8618437eabe6c597549e0989ec4e6Ben Gruver return set; 5422c3185bb7c8618437eabe6c597549e0989ec4e6Ben Gruver } 5522c3185bb7c8618437eabe6c597549e0989ec4e6Ben Gruver 562d7e1111358e2b8cc951a46dc8b0217a7fa0deadBen Gruver @Nonnull public static <T> ImmutableSortedSet<T> nullToEmptySortedSet(@Nullable ImmutableSortedSet<T> set) { 572d7e1111358e2b8cc951a46dc8b0217a7fa0deadBen Gruver if (set == null) { 582d7e1111358e2b8cc951a46dc8b0217a7fa0deadBen Gruver return ImmutableSortedSet.of(); 592d7e1111358e2b8cc951a46dc8b0217a7fa0deadBen Gruver } 602d7e1111358e2b8cc951a46dc8b0217a7fa0deadBen Gruver return set; 612d7e1111358e2b8cc951a46dc8b0217a7fa0deadBen Gruver } 62b0383884fa44aa649cabb706325e922ee167c94aBen Gruver} 63