Java example source code file (SynchronizedBiMapTest.java)

This example Java source code file (SynchronizedBiMapTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

bimap, integer, object, override, set, string, synchronizedbimap, synchronizedhashbimapgenerator, synchronizedset, testbimap, teststringbimapgenerator, testsuite, util

The SynchronizedBiMapTest.java Java example source code

/*
 * Copyright (C) 2007 The Guava Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.collect;

import static com.google.common.base.Preconditions.checkArgument;

import com.google.common.collect.Synchronized.SynchronizedBiMap;
import com.google.common.collect.Synchronized.SynchronizedSet;
import com.google.common.collect.testing.features.CollectionFeature;
import com.google.common.collect.testing.features.CollectionSize;
import com.google.common.collect.testing.features.MapFeature;
import com.google.common.collect.testing.google.BiMapInverseTester;
import com.google.common.collect.testing.google.BiMapTestSuiteBuilder;
import com.google.common.collect.testing.google.TestStringBiMapGenerator;

import junit.framework.TestSuite;

import java.util.Map.Entry;
import java.util.Set;

/**
 * Tests for {@code Synchronized#biMap}.
 *
 * @author Mike Bostock
 */
public class SynchronizedBiMapTest extends SynchronizedMapTest {

  public static TestSuite suite() {
    TestSuite suite = new TestSuite(SynchronizedBiMapTest.class);
    suite.addTest(BiMapTestSuiteBuilder.using(new SynchTestingBiMapGenerator())
        .named("Synchronized.biMap[TestBiMap]")
        .withFeatures(CollectionSize.ANY,
            CollectionFeature.SUPPORTS_ITERATOR_REMOVE,
            MapFeature.ALLOWS_NULL_KEYS,
            MapFeature.ALLOWS_NULL_VALUES,
            MapFeature.ALLOWS_ANY_NULL_QUERIES,
            MapFeature.GENERAL_PURPOSE,
            MapFeature.REJECTS_DUPLICATES_AT_CREATION)
        .createTestSuite());
    suite.addTest(BiMapTestSuiteBuilder.using(new SynchronizedHashBiMapGenerator())
        .named("synchronizedBiMap[HashBiMap]")
        .withFeatures(CollectionSize.ANY,
            CollectionFeature.SUPPORTS_ITERATOR_REMOVE,
            MapFeature.ALLOWS_NULL_KEYS,
            MapFeature.ALLOWS_NULL_VALUES,
            MapFeature.ALLOWS_ANY_NULL_QUERIES,
            MapFeature.GENERAL_PURPOSE,
            MapFeature.REJECTS_DUPLICATES_AT_CREATION,
            CollectionFeature.SERIALIZABLE)
        .suppressing(BiMapInverseTester.getInverseSameAfterSerializingMethods())
        .createTestSuite());
    return suite;
  }

  @Override protected <K, V> BiMap create() {
    TestBiMap<K, V> inner =
        new TestBiMap<K, V>(HashBiMap.create(), mutex);
    BiMap<K, V> outer = Synchronized.biMap(inner, mutex);
    return outer;
  }

  public static final class SynchronizedHashBiMapGenerator extends TestStringBiMapGenerator {
    @Override
    protected BiMap<String, String> create(Entry[] entries) {
      Object mutex = new Object();
      BiMap<String, String> result = HashBiMap.create();
      for (Entry<String, String> entry : entries) {
        checkArgument(!result.containsKey(entry.getKey()));
        result.put(entry.getKey(), entry.getValue());
      }
      return Maps.synchronizedBiMap(result);
    }
  }

  public static final class SynchTestingBiMapGenerator extends TestStringBiMapGenerator {
    @Override
    protected BiMap<String, String> create(Entry[] entries) {
      Object mutex = new Object();
      BiMap<String, String> backing =
          new TestBiMap<String, String>(HashBiMap.create(), mutex);
      BiMap<String, String> result = Synchronized.biMap(backing, mutex);
      for (Entry<String, String> entry : entries) {
        checkArgument(!result.containsKey(entry.getKey()));
        result.put(entry.getKey(), entry.getValue());
      }
      return result;
    }
  }

  static class TestBiMap<K, V> extends TestMap implements BiMap {
    private final BiMap<K, V> delegate;

    public TestBiMap(BiMap<K, V> delegate, Object mutex) {
      super(delegate, mutex);
      this.delegate = delegate;
    }

    @Override
    public V forcePut(K key, V value) {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.forcePut(key, value);
    }

    @Override
    public BiMap<V, K> inverse() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.inverse();
    }

    @Override public Set<V> values() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.values();
    }

    private static final long serialVersionUID = 0;
  }

  public void testForcePut() {
    create().forcePut(null, null);
  }

  public void testInverse() {
    BiMap<String, Integer> bimap = create();
    BiMap<Integer, String> inverse = bimap.inverse();
    assertSame(bimap, inverse.inverse());
    assertTrue(inverse instanceof SynchronizedBiMap);
    assertSame(mutex, ((SynchronizedBiMap<?, ?>) inverse).mutex);
  }

  @Override public void testValues() {
    BiMap<String, Integer> map = create();
    Set<Integer> values = map.values();
    assertTrue(values instanceof SynchronizedSet);
    assertSame(mutex, ((SynchronizedSet<?>) values).mutex);
  }
}