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      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 import com.google.gwt.user.client.rpc.core.java.util.Collection_CustomFieldSerializerBase;
     23 
     24 import java.util.List;
     25 
     26 /**
     27  * This class implements the GWT serialization of {@link RegularImmutableSet}.
     28  *
     29  * @author Hayward Chan
     30  */
     31 public class RegularImmutableSet_CustomFieldSerializer {
     32 
     33   public static void deserialize(SerializationStreamReader reader,
     34       RegularImmutableSet<?> instance) {
     35   }
     36 
     37   public static RegularImmutableSet<Object> instantiate(
     38       SerializationStreamReader reader) throws SerializationException {
     39     List<Object> elements = Lists.newArrayList();
     40     Collection_CustomFieldSerializerBase.deserialize(reader, elements);
     41     /*
     42      * For this custom field serializer to be invoked, the set must have been
     43      * RegularImmutableSet before it's serialized.  Since RegularImmutableSet
     44      * always have two or more elements, ImmutableSet.copyOf always return
     45      * a RegularImmutableSet back.
     46      */
     47     return (RegularImmutableSet<Object>) ImmutableSet.copyOf(elements);
     48   }
     49 
     50   public static void serialize(SerializationStreamWriter writer,
     51       RegularImmutableSet<?> instance) throws SerializationException {
     52     Collection_CustomFieldSerializerBase.serialize(writer, instance);
     53   }
     54 }
     55