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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.base;
     18 
     19 import com.google.common.annotations.GwtCompatible;
     20 
     21 import java.util.Set;
     22 
     23 import javax.annotation.Nullable;
     24 
     25 /**
     26  * Contains dummy collection implementations to convince GWT that part of
     27  * serializing a collection is serializing its elements.
     28  *
     29  * <p>See {@linkplain com.google.common.collect.GwtSerializationDependencies the
     30  * com.google.common.collect version} for more details.
     31  *
     32  * @author Chris Povirk
     33  */
     34 @GwtCompatible
     35 final class GwtSerializationDependencies {
     36   private GwtSerializationDependencies() {}
     37 
     38   static final class OptionalDependencies<T> extends Optional<T> {
     39     T value;
     40 
     41     OptionalDependencies() {
     42       super();
     43     }
     44 
     45     @Override public boolean isPresent() {
     46       throw new AssertionError();
     47     }
     48 
     49     @Override public T get() {
     50       throw new AssertionError();
     51     }
     52 
     53     @Override public T or(T defaultValue) {
     54       throw new AssertionError();
     55     }
     56 
     57     @Override public Optional<T> or(Optional<? extends T> secondChoice) {
     58       throw new AssertionError();
     59     }
     60 
     61     @Override public T or(Supplier<? extends T> supplier) {
     62       throw new AssertionError();
     63     }
     64 
     65     @Override public T orNull() {
     66       throw new AssertionError();
     67     }
     68 
     69     @Override public Set<T> asSet() {
     70       throw new AssertionError();
     71     }
     72 
     73     @Override public <V> Optional<V> transform(
     74         Function<? super T, V> function) {
     75       throw new AssertionError();
     76     }
     77 
     78     @Override public boolean equals(@Nullable Object object) {
     79       throw new AssertionError();
     80     }
     81 
     82     @Override public int hashCode() {
     83       throw new AssertionError();
     84     }
     85 
     86     @Override public String toString() {
     87       throw new AssertionError();
     88     }
     89   }
     90 }
     91