10888a09821a98ac0680fad765217302858e70fa4Paul Duffin/*
20888a09821a98ac0680fad765217302858e70fa4Paul Duffin * Copyright (C) 2009 The Guava Authors
30888a09821a98ac0680fad765217302858e70fa4Paul Duffin *
40888a09821a98ac0680fad765217302858e70fa4Paul Duffin * Licensed under the Apache License, Version 2.0 (the "License");
50888a09821a98ac0680fad765217302858e70fa4Paul Duffin * you may not use this file except in compliance with the License.
60888a09821a98ac0680fad765217302858e70fa4Paul Duffin * You may obtain a copy of the License at
70888a09821a98ac0680fad765217302858e70fa4Paul Duffin *
80888a09821a98ac0680fad765217302858e70fa4Paul Duffin * http://www.apache.org/licenses/LICENSE-2.0
90888a09821a98ac0680fad765217302858e70fa4Paul Duffin *
100888a09821a98ac0680fad765217302858e70fa4Paul Duffin * Unless required by applicable law or agreed to in writing, software
110888a09821a98ac0680fad765217302858e70fa4Paul Duffin * distributed under the License is distributed on an "AS IS" BASIS,
120888a09821a98ac0680fad765217302858e70fa4Paul Duffin * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
130888a09821a98ac0680fad765217302858e70fa4Paul Duffin * See the License for the specific language governing permissions and
140888a09821a98ac0680fad765217302858e70fa4Paul Duffin * limitations under the License.
150888a09821a98ac0680fad765217302858e70fa4Paul Duffin */
160888a09821a98ac0680fad765217302858e70fa4Paul Duffin
170888a09821a98ac0680fad765217302858e70fa4Paul Duffinpackage com.google.common.collect;
180888a09821a98ac0680fad765217302858e70fa4Paul Duffin
190888a09821a98ac0680fad765217302858e70fa4Paul Duffinimport com.google.gwt.user.client.rpc.SerializationException;
200888a09821a98ac0680fad765217302858e70fa4Paul Duffinimport com.google.gwt.user.client.rpc.SerializationStreamReader;
210888a09821a98ac0680fad765217302858e70fa4Paul Duffinimport com.google.gwt.user.client.rpc.SerializationStreamWriter;
220888a09821a98ac0680fad765217302858e70fa4Paul Duffin
230888a09821a98ac0680fad765217302858e70fa4Paul Duffinimport java.util.Collection;
240888a09821a98ac0680fad765217302858e70fa4Paul Duffinimport java.util.Map;
250888a09821a98ac0680fad765217302858e70fa4Paul Duffin
260888a09821a98ac0680fad765217302858e70fa4Paul Duffin/**
270888a09821a98ac0680fad765217302858e70fa4Paul Duffin * This class contains static utility methods for writing {@code Multimap} GWT
280888a09821a98ac0680fad765217302858e70fa4Paul Duffin * field serializers. Serializers should delegate to
290888a09821a98ac0680fad765217302858e70fa4Paul Duffin * {@link #serialize(SerializationStreamWriter, Multimap)} and to either
300888a09821a98ac0680fad765217302858e70fa4Paul Duffin * {@link #instantiate(SerializationStreamReader, ImmutableMultimap.Builder)} or
310888a09821a98ac0680fad765217302858e70fa4Paul Duffin * {@link #populate(SerializationStreamReader, Multimap)}.
320888a09821a98ac0680fad765217302858e70fa4Paul Duffin *
330888a09821a98ac0680fad765217302858e70fa4Paul Duffin * @author Chris Povirk
340888a09821a98ac0680fad765217302858e70fa4Paul Duffin */
350888a09821a98ac0680fad765217302858e70fa4Paul Duffinpublic final class Multimap_CustomFieldSerializerBase {
360888a09821a98ac0680fad765217302858e70fa4Paul Duffin
370888a09821a98ac0680fad765217302858e70fa4Paul Duffin  static ImmutableMultimap<Object, Object> instantiate(
380888a09821a98ac0680fad765217302858e70fa4Paul Duffin      SerializationStreamReader reader,
390888a09821a98ac0680fad765217302858e70fa4Paul Duffin      ImmutableMultimap.Builder<Object, Object> builder)
400888a09821a98ac0680fad765217302858e70fa4Paul Duffin      throws SerializationException {
410888a09821a98ac0680fad765217302858e70fa4Paul Duffin    int keyCount = reader.readInt();
420888a09821a98ac0680fad765217302858e70fa4Paul Duffin    for (int i = 0; i < keyCount; ++i) {
430888a09821a98ac0680fad765217302858e70fa4Paul Duffin      Object key = reader.readObject();
440888a09821a98ac0680fad765217302858e70fa4Paul Duffin      int valueCount = reader.readInt();
450888a09821a98ac0680fad765217302858e70fa4Paul Duffin      for (int j = 0; j < valueCount; ++j) {
460888a09821a98ac0680fad765217302858e70fa4Paul Duffin        Object value = reader.readObject();
470888a09821a98ac0680fad765217302858e70fa4Paul Duffin        builder.put(key, value);
480888a09821a98ac0680fad765217302858e70fa4Paul Duffin      }
490888a09821a98ac0680fad765217302858e70fa4Paul Duffin    }
500888a09821a98ac0680fad765217302858e70fa4Paul Duffin    return builder.build();
510888a09821a98ac0680fad765217302858e70fa4Paul Duffin  }
520888a09821a98ac0680fad765217302858e70fa4Paul Duffin
530888a09821a98ac0680fad765217302858e70fa4Paul Duffin  public static Multimap<Object, Object> populate(
540888a09821a98ac0680fad765217302858e70fa4Paul Duffin      SerializationStreamReader reader, Multimap<Object, Object> multimap)
550888a09821a98ac0680fad765217302858e70fa4Paul Duffin      throws SerializationException {
560888a09821a98ac0680fad765217302858e70fa4Paul Duffin    int keyCount = reader.readInt();
570888a09821a98ac0680fad765217302858e70fa4Paul Duffin    for (int i = 0; i < keyCount; ++i) {
580888a09821a98ac0680fad765217302858e70fa4Paul Duffin      Object key = reader.readObject();
590888a09821a98ac0680fad765217302858e70fa4Paul Duffin      int valueCount = reader.readInt();
600888a09821a98ac0680fad765217302858e70fa4Paul Duffin      for (int j = 0; j < valueCount; ++j) {
610888a09821a98ac0680fad765217302858e70fa4Paul Duffin        Object value = reader.readObject();
620888a09821a98ac0680fad765217302858e70fa4Paul Duffin        multimap.put(key, value);
630888a09821a98ac0680fad765217302858e70fa4Paul Duffin      }
640888a09821a98ac0680fad765217302858e70fa4Paul Duffin    }
650888a09821a98ac0680fad765217302858e70fa4Paul Duffin    return multimap;
660888a09821a98ac0680fad765217302858e70fa4Paul Duffin  }
670888a09821a98ac0680fad765217302858e70fa4Paul Duffin
680888a09821a98ac0680fad765217302858e70fa4Paul Duffin  public static void serialize(
690888a09821a98ac0680fad765217302858e70fa4Paul Duffin      SerializationStreamWriter writer, Multimap<?, ?> instance)
700888a09821a98ac0680fad765217302858e70fa4Paul Duffin      throws SerializationException {
710888a09821a98ac0680fad765217302858e70fa4Paul Duffin    writer.writeInt(instance.asMap().size());
720888a09821a98ac0680fad765217302858e70fa4Paul Duffin    for (Map.Entry<?, ? extends Collection<?>> entry
730888a09821a98ac0680fad765217302858e70fa4Paul Duffin        : instance.asMap().entrySet()) {
740888a09821a98ac0680fad765217302858e70fa4Paul Duffin      writer.writeObject(entry.getKey());
750888a09821a98ac0680fad765217302858e70fa4Paul Duffin      writer.writeInt(entry.getValue().size());
760888a09821a98ac0680fad765217302858e70fa4Paul Duffin      for (Object value : entry.getValue()) {
770888a09821a98ac0680fad765217302858e70fa4Paul Duffin        writer.writeObject(value);
780888a09821a98ac0680fad765217302858e70fa4Paul Duffin      }
790888a09821a98ac0680fad765217302858e70fa4Paul Duffin    }
800888a09821a98ac0680fad765217302858e70fa4Paul Duffin  }
810888a09821a98ac0680fad765217302858e70fa4Paul Duffin
820888a09821a98ac0680fad765217302858e70fa4Paul Duffin  private Multimap_CustomFieldSerializerBase() {}
830888a09821a98ac0680fad765217302858e70fa4Paul Duffin}
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