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Java example source code file (BoundFieldModuleTest.java)

This example Java source code file (BoundFieldModuleTest.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

annotation, bind, boundfieldmodule, creationexception, fieldbindableclass, injector, integer, integerprovider, lazyclass, named, nullable, object, override, parameterizedobject, provider, util

The BoundFieldModuleTest.java Java example source code

/*
 * Copyright (C) 2014 Google Inc.
 *
 * 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.inject.testing.fieldbinder;

import static com.google.inject.Asserts.assertContains;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

import com.google.inject.BindingAnnotation;
import com.google.inject.ConfigurationException;
import com.google.inject.CreationException;
import com.google.inject.Guice;
import com.google.inject.Inject;
import com.google.inject.Injector;
import com.google.inject.Key;
import com.google.inject.Provider;
import com.google.inject.ProvisionException;
import com.google.inject.name.Named;
import com.google.inject.name.Names;
import com.google.inject.util.Providers;

import junit.framework.TestCase;

import java.lang.annotation.Retention;
import java.util.Arrays;
import java.util.List;

import javax.inject.Qualifier;

/** Unit tests for {@link BoundFieldModule}. */
public class BoundFieldModuleTest extends TestCase {
  public void testBindingNothing() {
    Object instance = new Object() {};

    BoundFieldModule module = BoundFieldModule.of(instance);
    Guice.createInjector(module);

    // If we didn't throw an exception, we succeeded.
  }

  public void testBindingOnePrivate() {
    final Integer testValue = 1024;
    Object instance = new Object() {
      @Bind private Integer anInt = testValue;
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertEquals(testValue, injector.getInstance(Integer.class));
  }

  public void testBindingOnePublic() {
    final Integer testValue = 1024;
    Object instance = new Object() {
      @Bind public Integer anInt = testValue;
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertEquals(testValue, injector.getInstance(Integer.class));
  }

  private static class FieldBindableClass {
    @Bind Integer anInt;

    FieldBindableClass(Integer anInt) {
      this.anInt = anInt;
    }
  }

  private static class FieldBindableSubclass extends FieldBindableClass {
    FieldBindableSubclass(Integer anInt) {
      super(anInt);
    }
  }

  public void testSuperTypeBinding() {
    FieldBindableSubclass instance = new FieldBindableSubclass(1024);

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertEquals(instance.anInt, injector.getInstance(Integer.class));
  }

  public void testBindingTwo() {
    final Integer testValue = 1024;
    final String testString = "Hello World!";
    Object instance = new Object() {
      @Bind private Integer anInt = testValue;
      @Bind private String aString = testString;
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertEquals(testValue, injector.getInstance(Integer.class));
    assertEquals(testString, injector.getInstance(String.class));
  }

  public void testBindingSuperType() {
    final Integer testValue = 1024;
    Object instance = new Object() {
      @Bind(to = Number.class) private Integer anInt = testValue;
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertEquals(testValue, injector.getInstance(Number.class));
  }

  public void testBindingSuperTypeAccessSubType() {
    final Integer testValue = 1024;
    Object instance = new Object() {
      @Bind(to = Number.class) private Integer anInt = testValue;
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    try {
      injector.getInstance(Integer.class);
      fail();
    } catch (ConfigurationException e) {
      assertContains(
          e.getMessage(),
          "Could not find a suitable constructor in java.lang.Integer");
    }
  }

  public void testBindingIncorrectTypeProviderFails() {
    final Integer testValue = 1024;
    Object instance = new Object() {
      @Bind(to = String.class) private Provider<Integer> anIntProvider = new Provider() {
        @Override public Integer get() {
          return testValue;
        }
      };
    };

    BoundFieldModule module = BoundFieldModule.of(instance);

    try {
      Guice.createInjector(module);
      fail();
    } catch (CreationException e) {
      assertContains(
          e.getMessage(),
          "Requested binding type \"java.lang.String\" is not "
          + "assignable from field binding type \"java.lang.Integer\"");
    }
  }

  @BindingAnnotation
  @Retention(RUNTIME)
  private static @interface SomeBindingAnnotation {}

  public void testBindingWithBindingAnnotation() {
    final Integer testValue1 = 1024, testValue2 = 2048;
    Object instance = new Object() {
      @Bind private Integer anInt = testValue1;

      @Bind
      @SomeBindingAnnotation
      private Integer anotherInt = testValue2;
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertEquals(testValue1, injector.getInstance(Integer.class));
    assertEquals(
        testValue2,
        injector.getInstance(Key.get(Integer.class, SomeBindingAnnotation.class)));
  }

  @Qualifier
  @Retention(RUNTIME)
  private static @interface SomeQualifier {}

  public void testBindingWithQualifier() {
    final Integer testValue1 = 1024, testValue2 = 2048;
    Object instance = new Object() {
      @Bind private Integer anInt = testValue1;

      @Bind
      @SomeQualifier
      private Integer anotherInt = testValue2;
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertEquals(testValue1, injector.getInstance(Integer.class));
    assertEquals(
        testValue2,
        injector.getInstance(Key.get(Integer.class, SomeQualifier.class)));
  }

  public void testCanReuseBindingAnnotationsWithDifferentValues() {
    final Integer testValue1 = 1024, testValue2 = 2048;
    final String name1 = "foo", name2 = "bar";
    Object instance = new Object() {
      @Bind
      @Named(name1)
      private Integer anInt = testValue1;

      @Bind
      @Named(name2)
      private Integer anotherInt = testValue2;
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertEquals(
        testValue1,
        injector.getInstance(Key.get(Integer.class, Names.named(name1))));
    assertEquals(
        testValue2,
        injector.getInstance(Key.get(Integer.class, Names.named(name2))));
  }

  public void testBindingWithValuedBindingAnnotation() {
    final Integer testValue1 = 1024, testValue2 = 2048;
    final String name = "foo";
    Object instance = new Object() {
      @Bind private Integer anInt = testValue1;

      @Bind
      @Named(name)
      private Integer anotherInt = testValue2;
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertEquals(testValue1, injector.getInstance(Integer.class));
    assertEquals(
        testValue2,
        injector.getInstance(Key.get(Integer.class, Names.named(name))));
  }

  public void testBindingWithGenerics() {
    final List<Integer> testIntList = Arrays.asList(new Integer[] {1, 2, 3});
    final List<Boolean> testBoolList = Arrays.asList(new Boolean[] {true, true, false});
    Object instance = new Object() {
      @Bind private List<Integer> anIntList = testIntList;
      @Bind private List<Boolean> aBoolList = testBoolList;
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertEquals(testIntList, injector.getInstance(new Key<List() {}));
    assertEquals(testBoolList, injector.getInstance(new Key<List() {}));
  }

  public void testBoundValueDoesntChange() {
    Integer testValue = 1024;
    FieldBindableClass instance = new FieldBindableClass(testValue);

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertEquals(testValue, injector.getInstance(Integer.class));
    instance.anInt++;
    assertEquals(testValue, injector.getInstance(Integer.class));
  }

  public void testIncompatibleBindingType() {
    final Integer testInt = 1024;
    Object instance = new Object() {
      @Bind(to = String.class) private Integer anInt = testInt;
    };

    BoundFieldModule module = BoundFieldModule.of(instance);

    try {
      Guice.createInjector(module);
      fail();
    } catch (CreationException e) {
      assertContains(e.getMessage(),
          "Requested binding type \"java.lang.String\" is not assignable from field binding type "
          + "\"java.lang.Integer\"");
    }
  }

  public void testFailureOnMultipleBindingAnnotations() {
    final Integer testInt = 1024;
    Object instance = new Object() {
      @Bind
      @Named("a")
      @SomeBindingAnnotation
      private Integer anInt = testInt;
    };

    BoundFieldModule module = BoundFieldModule.of(instance);

    try {
      Guice.createInjector(module);
      fail();
    } catch (CreationException e) {
      assertContains(e.getMessage(), "More than one annotation is specified for this binding.");
    }
  }

  public void testBindingSuperTypeAndBindingAnnotation() {
    final Integer testValue = 1024;
    Object instance = new Object() {
      @Bind(to = Number.class)
      @Named("foo")
      private Integer anInt = testValue;
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertEquals(testValue, injector.getInstance(Key.get(Number.class, Names.named("foo"))));
  }

  public void testBindingProvider() {
    final Integer testValue = 1024;
    Object instance = new Object() {
      @Bind private Provider<Integer> anInt = new Provider() {
        @Override public Integer get() {
          return testValue;
        }
      };
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertEquals(testValue, injector.getInstance(Integer.class));
  }

  public void testBindingJavaxProvider() {
    final Integer testValue = 1024;
    Object instance = new Object() {
      @Bind private javax.inject.Provider<Integer> anInt = new javax.inject.Provider() {
        @Override public Integer get() {
          return testValue;
        }
      };
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertEquals(testValue, injector.getInstance(Integer.class));
  }

  public void testBindingNonNullableNullField() {
    Object instance = new Object() {
      @Bind private Integer anInt = null;
    };

    BoundFieldModule module = BoundFieldModule.of(instance);

    try {
      Guice.createInjector(module);
      fail();
    } catch (CreationException e) {
      assertContains(e.getMessage(),
          "Binding to null values is only allowed for fields that are annotated @Nullable.");
    }
  }

  @Retention(RUNTIME)
  private @interface Nullable {}

  public void testBindingNullableNullField() {
    Object instance = new Object() {
      @Bind @Nullable private Integer anInt = null;
    };

    Injector injector = Guice.createInjector(BoundFieldModule.of(instance));
    assertNull(injector.getInstance(Integer.class));
  }

  public void testBindingNullProvider() {
    Object instance = new Object() {
      @Bind private Provider<Integer> anIntProvider = null;
    };

    BoundFieldModule module = BoundFieldModule.of(instance);

    try {
      Guice.createInjector(module);
      fail();
    } catch (CreationException e) {
      assertContains(e.getMessage(),
          "Binding to null is not allowed. Use Providers.of(null) if this is your intended "
              + "behavior.");
    }
  }

  public void testBindingNullableNullProvider() {
    Object instance = new Object() {
      @Bind @Nullable private Provider<Integer> anIntProvider = null;
    };

    BoundFieldModule module = BoundFieldModule.of(instance);

    try {
      Guice.createInjector(module);
      fail();
    } catch (CreationException e) {
      assertContains(e.getMessage(),
          "Binding to null is not allowed. Use Providers.of(null) if this is your intended "
              + "behavior.");
    }
  }

  private static class IntegerProvider implements Provider<Integer> {
    private final Integer value;

    IntegerProvider(Integer value) {
      this.value = value;
    }

    @Override public Integer get() {
      return value;
    }
  }

  public void testProviderSubclassesBindToTheProviderItself() {
    final IntegerProvider integerProvider = new IntegerProvider(1024);
    Object instance = new Object() {
      @Bind private IntegerProvider anIntProvider = integerProvider;
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertEquals(integerProvider, injector.getInstance(IntegerProvider.class));
  }

  public void testProviderSubclassesDoNotBindParameterizedType() {
    final Integer testValue = 1024;
    Object instance = new Object() {
      @Bind private IntegerProvider anIntProvider = new IntegerProvider(testValue);
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    try {
      injector.getInstance(Integer.class);
      fail();
    } catch (ConfigurationException e) {
      assertContains(e.getMessage(), "Could not find a suitable constructor in java.lang.Integer.");
    }
  }

  public void testNullableProviderSubclassesAllowNull() {
    Object instance = new Object() {
      @Bind @Nullable private IntegerProvider anIntProvider = null;
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertNull(injector.getInstance(IntegerProvider.class));
  }

  private static class ParameterizedObject<T> {
    ParameterizedObject(T instance) {
      this.instance = instance;
    }

    @Bind private T instance;
  }

  public void testBindParameterizedTypeFails() {
    ParameterizedObject<Integer> instance = new ParameterizedObject(0);

    BoundFieldModule module = BoundFieldModule.of(instance);

    try {
      Guice.createInjector(module);
      fail();
    } catch (CreationException e) {
      assertContains(e.getMessage(), "T cannot be used as a key; It is not fully specified.");
    }
  }

  public void testBindSubclassOfParameterizedTypeSucceeds() {
    final Integer testValue = 1024;
    ParameterizedObject<Integer> instance = new ParameterizedObject(testValue) {};

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertEquals(testValue, injector.getInstance(Integer.class));
  }

  public void testBindArray() {
    final Integer[] testArray = new Integer[] { 1024, 2048 };
    Object instance = new Object() {
      @Bind private Integer[] anIntArray = testArray;
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertEquals(testArray, injector.getInstance(Integer[].class));
  }

  public void testRawProviderCannotBeBound() {
    final Integer testValue = 1024;
    Object instance = new Object() {
      @Bind private Provider anIntProvider = new Provider() {
        @Override public Object get() {
          return testValue;
        }
      };
    };

    BoundFieldModule module = BoundFieldModule.of(instance);

    try {
      Guice.createInjector(module);
      fail();
    } catch (CreationException e) {
      assertContains(e.getMessage(),
          "Non parameterized Provider fields must have an "
          + "explicit binding class via @Bind(to = Foo.class)");
    }
  }

  public void testExplicitlyBoundRawProviderCanBeBound() {
    final Integer testValue = 1024;
    Object instance = new Object() {
      @Bind(to = Integer.class) private Provider anIntProvider = new Provider() {
        @Override public Object get() {
          return testValue;
        }
      };
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertEquals(testValue, injector.getInstance(Integer.class));
  }

  public void testRawProviderCanBindToIncorrectType() {
    final Integer testValue = 1024;
    Object instance = new Object() {
      @Bind(to = String.class) private Provider anIntProvider = new Provider() {
        @Override public Object get() {
          return testValue;
        }
      };
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertEquals(testValue, injector.getInstance(String.class));
  }

  public void testMultipleErrorsAreAggregated() {
    Object instance = new Object() {
      @Bind private Provider aProvider;
      @Bind(to = String.class) private Integer anInt;
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    try {
      Guice.createInjector(module);
      fail();
    } catch (CreationException e) {
      assertEquals(2, e.getErrorMessages().size());
    }
  }

  public void testBindingProviderWithProviderSubclassValue() {
    final Integer testValue = 1024;
    Object instance = new Object() {
      @Bind private Provider<Integer> anIntProvider = new IntegerProvider(testValue);
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertEquals(testValue, injector.getInstance(Integer.class));
  }

  public void testBoundFieldsCannotBeInjected() {
    Object instance = new Object() {
      @Bind
      @Inject
      Integer anInt = 0;
    };

    BoundFieldModule module = BoundFieldModule.of(instance);

    try {
      Guice.createInjector(module);
      fail();
    } catch (CreationException e) {
      assertContains(
          e.getMessage(),
          "Fields annotated with both @Bind and @Inject are illegal.");
    }
  }

  public void testIncrementingProvider() {
    final Integer testBaseValue = 1024;
    Object instance = new Object() {
      @Bind private Provider<Integer> anIntProvider = new Provider() {
        private int value = testBaseValue;

        @Override public Integer get() {
          return value++;
        }
      };
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertEquals(testBaseValue, injector.getInstance(Integer.class));
    assertEquals((Integer) (testBaseValue + 1), injector.getInstance(Integer.class));
    assertEquals((Integer) (testBaseValue + 2), injector.getInstance(Integer.class));
  }

  public void testProviderDoesNotProvideDuringInjectorConstruction() {
    Object instance = new Object() {
      @Bind private Provider<Integer> myIntProvider = new Provider() {
        @Override public Integer get() {
          throw new UnsupportedOperationException();
        }
      };
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    Guice.createInjector(module);

    // If we don't throw an exception, we succeeded.
  }

  private static class InvalidBindableClass {
    @Bind(to = String.class) Integer anInt;
  }

  public void testIncompatibleBindingTypeStackTraceHasUserFrame() {
    Object instance = new InvalidBindableClass();

    BoundFieldModule module = BoundFieldModule.of(instance);

    try {
      Guice.createInjector(module);
      fail();
    } catch (CreationException e) {
      assertContains(e.getMessage(), "at " + InvalidBindableClass.class.getName() + " field anInt");
    }
  }

  private static class InjectedNumberProvider implements Provider<Number> {
    @Inject Integer anInt;

    @Override public Number get() {
      return anInt;
    }
  }

  public void testBoundProvidersAreInjected() {
    final Integer testValue = 1024;
    Object instance = new Object() {
      @Bind private Integer anInt = testValue;
      @Bind private Provider<Number> aNumberProvider = new InjectedNumberProvider();
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertEquals(testValue, injector.getInstance(Number.class));
  }

  public void testBoundInstancesAreInjected() {
    final Integer testValue = 1024;
    final InjectedNumberProvider testNumberProvider = new InjectedNumberProvider();
    Object instance = new Object() {
      @Bind private Integer anInt = testValue;
      @Bind private InjectedNumberProvider aNumberProvider = testNumberProvider;
    };

    BoundFieldModule module = BoundFieldModule.of(instance);
    Guice.createInjector(module);

    assertEquals(testValue, testNumberProvider.anInt);
  }

  private static class InvalidBindableSubclass extends InvalidBindableClass {}

  public void testClassIsPrintedInErrorsWhenCauseIsSuperclass() {
    Object instance = new InvalidBindableSubclass();

    BoundFieldModule module = BoundFieldModule.of(instance);

    try {
      Guice.createInjector(module);
      fail();
    } catch (CreationException e) {
      assertContains(
          e.getMessage(),
          "Requested binding type \"java.lang.String\" is not assignable from field binding type "
          + "\"java.lang.Integer\"");
    }
  }

  private static class FieldBindableSubclass2 extends FieldBindableClass {
    @Bind Number aNumber;

    FieldBindableSubclass2(Integer anInt, Number aNumber) {
      super(anInt);
      this.aNumber = aNumber;
    }
  }

  public void testFieldsAreBoundFromFullClassHierarchy() {
    final Integer testValue1 = 1024, testValue2 = 2048;
    FieldBindableSubclass2 instance = new FieldBindableSubclass2(testValue1, testValue2);

    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertEquals(testValue1, injector.getInstance(Integer.class));
    assertEquals(testValue2, injector.getInstance(Number.class));
  }

  static final class LazyClass {
    @Bind(lazy = true) Integer foo = 1;
  }

  public void testFieldBound_lazy() {
    LazyClass asProvider = new LazyClass();
    Injector injector = Guice.createInjector(BoundFieldModule.of(asProvider));
    assertEquals(1, injector.getInstance(Integer.class).intValue());
    asProvider.foo++;
    assertEquals(2, injector.getInstance(Integer.class).intValue());
  }

  public void testNonNullableFieldBound_lazy_rejectNull() {
    LazyClass asProvider = new LazyClass();
    Injector injector = Guice.createInjector(BoundFieldModule.of(asProvider));
    assertEquals(1, injector.getInstance(Integer.class).intValue());
    asProvider.foo = null;
    try {
      injector.getInstance(Integer.class);
      fail();
    } catch (ProvisionException e) {
      assertContains(e.getMessage(),
          "Binding to null values is only allowed for fields that are annotated @Nullable.");
    }
  }

  static final class LazyClassNullable {
    @Bind(lazy = true) @Nullable Integer foo = 1;
  }

  public void testNullableFieldBound_lazy_allowNull() {
    LazyClassNullable asProvider = new LazyClassNullable();
    Injector injector = Guice.createInjector(BoundFieldModule.of(asProvider));
    assertEquals(1, injector.getInstance(Integer.class).intValue());
    asProvider.foo = null;
    assertNull(injector.getInstance(Integer.class));
  }

  static final class LazyProviderClass {
    @Bind(lazy = true) Provider<Integer> foo = Providers.of(null);
  }

  public void testFieldBoundAsProvider_lazy() {
    LazyProviderClass asProvider = new LazyProviderClass();
    Provider<Integer> provider =
        Guice.createInjector(BoundFieldModule.of(asProvider)).getProvider(Integer.class);
    assertNull(provider.get());
    asProvider.foo = Providers.of(1);
    assertEquals(1, provider.get().intValue());
    asProvider.foo =
        new Provider<Integer>() {
          @Override
          public Integer get() {
            throw new RuntimeException("boom");
          }
        };
    try {
      provider.get();
      fail();
    } catch (ProvisionException e) {
      assertContains(e.getMessage(), "boom");
    }
  }

  private static final class LazyNonTransparentProvider {
    @Bind(lazy = true)
    @Nullable
    private IntegerProvider anIntProvider = null;
  }

  public void testFieldBoundAsNonTransparentProvider_lazy() {
    LazyNonTransparentProvider instance = new LazyNonTransparentProvider();
    BoundFieldModule module = BoundFieldModule.of(instance);
    Injector injector = Guice.createInjector(module);

    assertNull(injector.getInstance(IntegerProvider.class));
    instance.anIntProvider = new IntegerProvider(3);
    assertEquals(3, injector.getInstance(IntegerProvider.class).get().intValue());
    try {
      injector.getInstance(Integer.class);
      fail();
    } catch (ConfigurationException expected) {
      // expected because we don't interpret IntegerProvider as a Provider<Integer>
    }
  }
}

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