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.Collection; 24 import java.util.Map; 25 26 /** 27 * This class contains static utility methods for writing {@code Multimap} GWT 28 * field serializers. Serializers should delegate to 29 * {@link #serialize(SerializationStreamWriter, Multimap)} and to either 30 * {@link #instantiate(SerializationStreamReader, ImmutableMultimap.Builder)} or 31 * {@link #populate(SerializationStreamReader, Multimap)}. 32 * 33 * @author Chris Povirk 34 */ 35 public final class Multimap_CustomFieldSerializerBase { 36 37 static ImmutableMultimap<Object, Object> instantiate( 38 SerializationStreamReader reader, 39 ImmutableMultimap.Builder<Object, Object> builder) 40 throws SerializationException { 41 int keyCount = reader.readInt(); 42 for (int i = 0; i < keyCount; ++i) { 43 Object key = reader.readObject(); 44 int valueCount = reader.readInt(); 45 for (int j = 0; j < valueCount; ++j) { 46 Object value = reader.readObject(); 47 builder.put(key, value); 48 } 49 } 50 return builder.build(); 51 } 52 53 public static Multimap<Object, Object> populate( 54 SerializationStreamReader reader, Multimap<Object, Object> multimap) 55 throws SerializationException { 56 int keyCount = reader.readInt(); 57 for (int i = 0; i < keyCount; ++i) { 58 Object key = reader.readObject(); 59 int valueCount = reader.readInt(); 60 for (int j = 0; j < valueCount; ++j) { 61 Object value = reader.readObject(); 62 multimap.put(key, value); 63 } 64 } 65 return multimap; 66 } 67 68 public static void serialize( 69 SerializationStreamWriter writer, Multimap<?, ?> instance) 70 throws SerializationException { 71 writer.writeInt(instance.asMap().size()); 72 for (Map.Entry<?, ? extends Collection<?>> entry 73 : instance.asMap().entrySet()) { 74 writer.writeObject(entry.getKey()); 75 writer.writeInt(entry.getValue().size()); 76 for (Object value : entry.getValue()) { 77 writer.writeObject(value); 78 } 79 } 80 } 81 82 private Multimap_CustomFieldSerializerBase() {} 83 } 84
