1 /* 2 * Copyright (C) 2009 The Guava Authors 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 com.google.common.collect; 18 19 import com.google.gwt.user.client.rpc.SerializationException; 20 import com.google.gwt.user.client.rpc.SerializationStreamReader; 21 import com.google.gwt.user.client.rpc.SerializationStreamWriter; 22 23 import java.util.Comparator; 24 25 /** 26 * This class implements the GWT serialization of 27 * {@link EmptyImmutableSortedSet}. 28 * 29 * @author Chris Povirk 30 */ 31 public class EmptyImmutableSortedSet_CustomFieldSerializer { 32 public static void deserialize(SerializationStreamReader reader, 33 EmptyImmutableSortedSet<?> instance) { 34 } 35 36 public static EmptyImmutableSortedSet<Object> instantiate( 37 SerializationStreamReader reader) throws SerializationException { 38 /* 39 * Nothing we can do, but we're already assuming the serialized form is 40 * correctly typed, anyway. 41 */ 42 @SuppressWarnings("unchecked") 43 Comparator<Object> comparator = (Comparator<Object>) reader.readObject(); 44 45 /* 46 * For this custom field serializer to be invoked, the set must have been 47 * EmptyImmutableSortedSet before it's serialized. Since 48 * EmptyImmutableSortedSet always has no elements, ImmutableSortedSet.copyOf 49 * always return an EmptyImmutableSortedSet back. 50 */ 51 return (EmptyImmutableSortedSet<Object>) 52 ImmutableSortedSet.orderedBy(comparator).build(); 53 } 54 55 public static void serialize(SerializationStreamWriter writer, 56 EmptyImmutableSortedSet<?> instance) throws SerializationException { 57 writer.writeObject(instance.comparator()); 58 } 59 } 60
