/*
* Copyright (C) 2007 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.assistedinject;
import static com.google.inject.Asserts.assertContains;
import com.google.common.collect.ImmutableSet;
import com.google.inject.AbstractModule;
import com.google.inject.Binding;
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.TypeLiteral;
import com.google.inject.assistedinject.FactoryProviderTest.Equals.ComparisonMethod;
import com.google.inject.assistedinject.FactoryProviderTest.Equals.Impl;
import com.google.inject.name.Named;
import com.google.inject.name.Names;
import com.google.inject.spi.Dependency;
import com.google.inject.spi.HasDependencies;
import java.util.Collection;
import java.util.Collections;
import java.util.Set;
import junit.framework.TestCase;
/**
* @author jmourits@google.com (Jerome Mourits)
* @author jessewilson@google.com (Jesse Wilson)
*/
@SuppressWarnings("deprecation")
public class FactoryProviderTest extends TestCase {
private enum Color {
BLUE,
GREEN,
RED,
GRAY,
BLACK,
ORANGE,
PINK
}
public void testAssistedFactory() {
Injector injector =
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(Double.class).toInstance(5.0d);
bind(ColoredCarFactory.class)
.toProvider(FactoryProvider.newFactory(ColoredCarFactory.class, Mustang.class));
}
});
ColoredCarFactory carFactory = injector.getInstance(ColoredCarFactory.class);
Mustang blueMustang = (Mustang) carFactory.create(Color.BLUE);
assertEquals(Color.BLUE, blueMustang.color);
assertEquals(5.0d, blueMustang.engineSize, 0.0);
Mustang redMustang = (Mustang) carFactory.create(Color.RED);
assertEquals(Color.RED, redMustang.color);
assertEquals(5.0d, redMustang.engineSize, 0.0);
}
public void testFactoryBindingDependencies() {
Injector injector =
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(Double.class).toInstance(5.0d);
bind(ColoredCarFactory.class)
.toProvider(FactoryProvider.newFactory(ColoredCarFactory.class, Mustang.class));
}
});
Binding<?> binding = injector.getBinding(ColoredCarFactory.class);
HasDependencies hasDependencies = (HasDependencies) binding;
assertEquals(
ImmutableSet.<Dependency<?>>of(Dependency.get(Key.get(double.class))),
hasDependencies.getDependencies());
}
public void testAssistedFactoryWithAnnotations() {
Injector injector =
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(int.class).annotatedWith(Names.named("horsePower")).toInstance(250);
bind(int.class).annotatedWith(Names.named("modelYear")).toInstance(1984);
bind(ColoredCarFactory.class)
.toProvider(FactoryProvider.newFactory(ColoredCarFactory.class, Camaro.class));
}
});
ColoredCarFactory carFactory = injector.getInstance(ColoredCarFactory.class);
Camaro blueCamaro = (Camaro) carFactory.create(Color.BLUE);
assertEquals(Color.BLUE, blueCamaro.color);
assertEquals(1984, blueCamaro.modelYear);
assertEquals(250, blueCamaro.horsePower);
Camaro redCamaro = (Camaro) carFactory.create(Color.RED);
assertEquals(Color.RED, redCamaro.color);
assertEquals(1984, redCamaro.modelYear);
assertEquals(250, redCamaro.horsePower);
}
interface Car {}
interface ColoredCarFactory {
Car create(Color color);
}
public static class Mustang implements Car {
private final double engineSize;
private final Color color;
@AssistedInject
public Mustang(double engineSize, @Assisted Color color) {
this.engineSize = engineSize;
this.color = color;
}
}
public static class Camaro implements Car {
private final int horsePower;
private final int modelYear;
private final Color color;
@AssistedInject
public Camaro(
@Named("horsePower") int horsePower,
@Named("modelYear") int modelYear,
@Assisted Color color) {
this.horsePower = horsePower;
this.modelYear = modelYear;
this.color = color;
}
}
interface SummerCarFactory {
Car create(Color color, boolean convertable);
Car createConvertible(Color color);
}
public void testFactoryWithMultipleMethods() {
Injector injector =
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(float.class).toInstance(140f);
bind(SummerCarFactory.class)
.toProvider(FactoryProvider.newFactory(SummerCarFactory.class, Corvette.class));
}
});
SummerCarFactory carFactory = injector.getInstance(SummerCarFactory.class);
Corvette blueCorvette = (Corvette) carFactory.createConvertible(Color.BLUE);
assertEquals(Color.BLUE, blueCorvette.color);
assertEquals(100f, blueCorvette.maxMph, 0.0f);
assertTrue(blueCorvette.isConvertable);
Corvette redCorvette = (Corvette) carFactory.create(Color.RED, false);
assertEquals(Color.RED, redCorvette.color);
assertEquals(140f, redCorvette.maxMph, 0.0f);
assertFalse(redCorvette.isConvertable);
}
public static class Corvette implements Car {
private boolean isConvertable;
private Color color;
private float maxMph;
@AssistedInject
public Corvette(@Assisted Color color) {
this(color, 100f, true);
}
@SuppressWarnings("unused")
public Corvette(@Assisted Color color, @Assisted boolean isConvertable) {
throw new IllegalStateException("Not an @AssistedInject constructor");
}
@AssistedInject
public Corvette(@Assisted Color color, Float maxMph, @Assisted boolean isConvertable) {
this.isConvertable = isConvertable;
this.color = color;
this.maxMph = maxMph;
}
}
public void testFactoryMethodsMismatch() {
try {
FactoryProvider.newFactory(SummerCarFactory.class, Beetle.class);
fail();
} catch (ConfigurationException e) {
assertContains(e.getMessage(), "Constructor mismatch");
}
}
public static class Beetle implements Car {
@AssistedInject
@SuppressWarnings("unused")
public Beetle(@Assisted Color color) {
throw new IllegalStateException("Conflicting constructors");
}
@AssistedInject
@SuppressWarnings("unused")
public Beetle(@Assisted Color color, @Assisted boolean isConvertable) {
throw new IllegalStateException("Conflicting constructors");
}
@AssistedInject
@SuppressWarnings("unused")
public Beetle(@Assisted Color color, @Assisted boolean isConvertable, float maxMph) {
throw new IllegalStateException("Conflicting constructors");
}
}
public void testMethodsAndFieldsGetInjected() {
Injector injector =
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(String.class).toInstance("turbo");
bind(int.class).toInstance(911);
bind(double.class).toInstance(50000d);
bind(ColoredCarFactory.class)
.toProvider(FactoryProvider.newFactory(ColoredCarFactory.class, Porshe.class));
}
});
ColoredCarFactory carFactory = injector.getInstance(ColoredCarFactory.class);
Porshe grayPorshe = (Porshe) carFactory.create(Color.GRAY);
assertEquals(Color.GRAY, grayPorshe.color);
assertEquals(50000d, grayPorshe.price, 0.0);
assertEquals(911, grayPorshe.model);
assertEquals("turbo", grayPorshe.name);
}
public static class Porshe implements Car {
private final Color color;
private final double price;
private @Inject String name;
private int model;
@AssistedInject
public Porshe(@Assisted Color color, double price) {
this.color = color;
this.price = price;
}
@Inject
void setModel(int model) {
this.model = model;
}
}
public void testProviderInjection() {
Injector injector =
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(String.class).toInstance("trans am");
bind(ColoredCarFactory.class)
.toProvider(
FactoryProvider.newFactory(ColoredCarFactory.class, Firebird.class));
}
});
ColoredCarFactory carFactory = injector.getInstance(ColoredCarFactory.class);
Firebird blackFirebird = (Firebird) carFactory.create(Color.BLACK);
assertEquals(Color.BLACK, blackFirebird.color);
assertEquals("trans am", blackFirebird.modifiersProvider.get());
}
public static class Firebird implements Car {
private final Provider<String> modifiersProvider;
private final Color color;
@AssistedInject
public Firebird(Provider<String> modifiersProvider, @Assisted Color color) {
this.modifiersProvider = modifiersProvider;
this.color = color;
}
}
public void testTypeTokenInjection() {
Injector injector =
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(new TypeLiteral<Set<String>>() {})
.toInstance(Collections.singleton("Flux Capacitor"));
bind(new TypeLiteral<Set<Integer>>() {}).toInstance(Collections.singleton(88));
bind(ColoredCarFactory.class)
.toProvider(
FactoryProvider.newFactory(ColoredCarFactory.class, DeLorean.class));
}
});
ColoredCarFactory carFactory = injector.getInstance(ColoredCarFactory.class);
DeLorean deLorean = (DeLorean) carFactory.create(Color.GRAY);
assertEquals(Color.GRAY, deLorean.color);
assertEquals("Flux Capacitor", deLorean.features.iterator().next());
assertEquals(Integer.valueOf(88), deLorean.featureActivationSpeeds.iterator().next());
}
public static class DeLorean implements Car {
private final Set<String> features;
private final Set<Integer> featureActivationSpeeds;
private final Color color;
@AssistedInject
public DeLorean(
Set<String> extraFeatures, Set<Integer> featureActivationSpeeds, @Assisted Color color) {
this.features = extraFeatures;
this.featureActivationSpeeds = featureActivationSpeeds;
this.color = color;
}
}
public void testTypeTokenProviderInjection() {
Injector injector =
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(new TypeLiteral<Set<String>>() {}).toInstance(Collections.singleton("Datsun"));
bind(ColoredCarFactory.class)
.toProvider(FactoryProvider.newFactory(ColoredCarFactory.class, Z.class));
}
});
ColoredCarFactory carFactory = injector.getInstance(ColoredCarFactory.class);
Z orangeZ = (Z) carFactory.create(Color.ORANGE);
assertEquals(Color.ORANGE, orangeZ.color);
assertEquals("Datsun", orangeZ.manufacturersProvider.get().iterator().next());
}
public static class Z implements Car {
private final Provider<Set<String>> manufacturersProvider;
private final Color color;
@AssistedInject
public Z(Provider<Set<String>> manufacturersProvider, @Assisted Color color) {
this.manufacturersProvider = manufacturersProvider;
this.color = color;
}
}
public static class Prius implements Car {
@SuppressWarnings("unused")
private final Color color;
@AssistedInject
private Prius(@Assisted Color color) {
this.color = color;
}
}
public void testAssistInjectionInNonPublicConstructor() {
Injector injector =
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(ColoredCarFactory.class)
.toProvider(FactoryProvider.newFactory(ColoredCarFactory.class, Prius.class));
}
});
injector.getInstance(ColoredCarFactory.class).create(Color.ORANGE);
}
public static class ExplodingCar implements Car {
@AssistedInject
public ExplodingCar(@SuppressWarnings("unused") @Assisted Color color) {
throw new IllegalStateException("kaboom!");
}
}
public void testExceptionDuringConstruction() {
Injector injector =
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(ColoredCarFactory.class)
.toProvider(
FactoryProvider.newFactory(ColoredCarFactory.class, ExplodingCar.class));
}
});
try {
injector.getInstance(ColoredCarFactory.class).create(Color.ORANGE);
fail();
} catch (IllegalStateException e) {
assertEquals("kaboom!", e.getMessage());
}
}
public static class DefectiveCar implements Car {
@AssistedInject
public DefectiveCar() throws ExplosionException {
throw new ExplosionException();
}
}
public static class ExplosionException extends Exception {}
public static class FireException extends Exception {}
public interface DefectiveCarFactoryWithNoExceptions {
Car createCar();
}
public interface DefectiveCarFactory {
Car createCar() throws FireException;
}
public void testFactoryMethodMustDeclareAllConstructorExceptions() {
try {
FactoryProvider.newFactory(DefectiveCarFactoryWithNoExceptions.class, DefectiveCar.class);
fail();
} catch (ConfigurationException expected) {
assertContains(expected.getMessage(), "no compatible exception is thrown");
}
}
public interface CorrectDefectiveCarFactory {
Car createCar() throws FireException, ExplosionException;
}
public void testConstructorExceptionsAreThrownByFactory() {
Injector injector =
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(CorrectDefectiveCarFactory.class)
.toProvider(
FactoryProvider.newFactory(
CorrectDefectiveCarFactory.class, DefectiveCar.class));
}
});
try {
injector.getInstance(CorrectDefectiveCarFactory.class).createCar();
fail();
} catch (FireException e) {
fail();
} catch (ExplosionException expected) {
}
}
public static class MultipleConstructorDefectiveCar implements Car {
@AssistedInject
public MultipleConstructorDefectiveCar() throws ExplosionException {
throw new ExplosionException();
}
@AssistedInject
public MultipleConstructorDefectiveCar(@SuppressWarnings("unused") @Assisted Color c)
throws FireException {
throw new FireException();
}
}
public interface MultipleConstructorDefectiveCarFactory {
Car createCar() throws ExplosionException;
Car createCar(Color r) throws FireException;
}
public void testMultipleConstructorExceptionMatching() {
Injector injector =
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(MultipleConstructorDefectiveCarFactory.class)
.toProvider(
FactoryProvider.newFactory(
MultipleConstructorDefectiveCarFactory.class,
MultipleConstructorDefectiveCar.class));
}
});
MultipleConstructorDefectiveCarFactory factory =
injector.getInstance(MultipleConstructorDefectiveCarFactory.class);
try {
factory.createCar();
fail();
} catch (ExplosionException expected) {
}
try {
factory.createCar(Color.RED);
fail();
} catch (FireException expected) {
}
}
public static class WildcardCollection {
public interface Factory {
WildcardCollection create(Collection<?> items);
}
@AssistedInject
public WildcardCollection(@SuppressWarnings("unused") @Assisted Collection<?> items) {}
}
public void testWildcardGenerics() {
Injector injector =
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(WildcardCollection.Factory.class)
.toProvider(
FactoryProvider.newFactory(
WildcardCollection.Factory.class, WildcardCollection.class));
}
});
WildcardCollection.Factory factory = injector.getInstance(WildcardCollection.Factory.class);
factory.create(Collections.emptyList());
}
public static class SteeringWheel {}
public static class Fiat implements Car {
@SuppressWarnings("unused")
private final SteeringWheel steeringWheel;
@SuppressWarnings("unused")
private final Color color;
@AssistedInject
public Fiat(SteeringWheel steeringWheel, @Assisted Color color) {
this.steeringWheel = steeringWheel;
this.color = color;
}
}
public void testFactoryWithImplicitBindings() {
Injector injector =
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(ColoredCarFactory.class)
.toProvider(FactoryProvider.newFactory(ColoredCarFactory.class, Fiat.class));
}
});
ColoredCarFactory coloredCarFactory = injector.getInstance(ColoredCarFactory.class);
Fiat fiat = (Fiat) coloredCarFactory.create(Color.GREEN);
assertEquals(Color.GREEN, fiat.color);
assertNotNull(fiat.steeringWheel);
}
public void testFactoryFailsWithMissingBinding() {
try {
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(ColoredCarFactory.class)
.toProvider(FactoryProvider.newFactory(ColoredCarFactory.class, Mustang.class));
}
});
fail();
} catch (CreationException expected) {
assertContains(
expected.getMessage(),
"1) Parameter of type 'double' is not injectable or annotated with @Assisted");
}
}
@SuppressWarnings("SelfEquals")
public void testMethodsDeclaredInObject() {
Injector injector =
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(Double.class).toInstance(5.0d);
bind(ColoredCarFactory.class)
.toProvider(FactoryProvider.newFactory(ColoredCarFactory.class, Mustang.class));
}
});
ColoredCarFactory carFactory = injector.getInstance(ColoredCarFactory.class);
carFactory.equals(carFactory);
carFactory.hashCode();
carFactory.toString();
}
public void testAssistedInjectConstructorAndAssistedFactoryParameterMustNotMix() {
try {
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(Double.class).toInstance(5.0d);
bind(AssistedParamsFactory.class)
.toProvider(
FactoryProvider.newFactory(AssistedParamsFactory.class, Mustang.class));
}
});
fail();
} catch (CreationException expected) {
assertContains(
expected.getMessage(),
"Factory method "
+ AssistedParamsFactory.class.getName()
+ ".create() has an @Assisted parameter, which "
+ "is incompatible with the deprecated @AssistedInject annotation.");
}
}
interface AssistedParamsFactory {
Car create(@Assisted Color color);
}
interface GenericColoredCarFactory<T extends Car> {
T create(Color color);
}
public void testGenericAssistedFactory() {
final TypeLiteral<GenericColoredCarFactory<Mustang>> mustangTypeLiteral =
new TypeLiteral<GenericColoredCarFactory<Mustang>>() {};
final TypeLiteral<GenericColoredCarFactory<Camaro>> camaroTypeLiteral =
new TypeLiteral<GenericColoredCarFactory<Camaro>>() {};
Injector injector =
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(Double.class).toInstance(5.0d);
bind(int.class).annotatedWith(Names.named("horsePower")).toInstance(250);
bind(int.class).annotatedWith(Names.named("modelYear")).toInstance(1984);
bind(mustangTypeLiteral)
.toProvider(
FactoryProvider.newFactory(
mustangTypeLiteral, TypeLiteral.get(Mustang.class)));
bind(camaroTypeLiteral)
.toProvider(
FactoryProvider.newFactory(
camaroTypeLiteral, TypeLiteral.get(Camaro.class)));
}
});
GenericColoredCarFactory<Mustang> mustangFactory =
injector.getInstance(Key.get(mustangTypeLiteral));
GenericColoredCarFactory<Camaro> camaroFactory =
injector.getInstance(Key.get(camaroTypeLiteral));
Mustang blueMustang = mustangFactory.create(Color.BLUE);
assertEquals(Color.BLUE, blueMustang.color);
assertEquals(5.0d, blueMustang.engineSize, 0.0);
Camaro redCamaro = camaroFactory.create(Color.RED);
assertEquals(Color.RED, redCamaro.color);
assertEquals(1984, redCamaro.modelYear);
assertEquals(250, redCamaro.horsePower);
}
@SuppressWarnings("unused")
public interface Insurance<T extends Car> {}
public static class MustangInsurance implements Insurance<Mustang> {
private final double premium;
private final double limit;
@SuppressWarnings("unused")
private Mustang car;
@AssistedInject
public MustangInsurance(
@Named("lowLimit") double limit, @Assisted Mustang car, @Assisted double premium) {
this.premium = premium;
this.limit = limit;
this.car = car;
}
public void sell() {}
}
public static class CamaroInsurance implements Insurance<Camaro> {
private final double premium;
private final double limit;
@SuppressWarnings("unused")
private Camaro car;
@AssistedInject
public CamaroInsurance(
@Named("highLimit") double limit, @Assisted Camaro car, @Assisted double premium) {
this.premium = premium;
this.limit = limit;
this.car = car;
}
public void sell() {}
}
public interface MustangInsuranceFactory {
public Insurance<Mustang> create(Mustang car, double premium);
}
public interface CamaroInsuranceFactory {
public Insurance<Camaro> create(Camaro car, double premium);
}
public void testAssistedFactoryForConcreteType() {
Injector injector =
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(Double.class).annotatedWith(Names.named("lowLimit")).toInstance(50000.0d);
bind(Double.class).annotatedWith(Names.named("highLimit")).toInstance(100000.0d);
bind(MustangInsuranceFactory.class)
.toProvider(
FactoryProvider.newFactory(
MustangInsuranceFactory.class, MustangInsurance.class));
bind(CamaroInsuranceFactory.class)
.toProvider(
FactoryProvider.newFactory(
CamaroInsuranceFactory.class, CamaroInsurance.class));
}
});
MustangInsuranceFactory mustangInsuranceFactory =
injector.getInstance(MustangInsuranceFactory.class);
CamaroInsuranceFactory camaroInsuranceFactory =
injector.getInstance(CamaroInsuranceFactory.class);
Mustang mustang = new Mustang(5000d, Color.BLACK);
MustangInsurance mustangPolicy =
(MustangInsurance) mustangInsuranceFactory.create(mustang, 800.0d);
assertEquals(800.0d, mustangPolicy.premium, 0.0);
assertEquals(50000.0d, mustangPolicy.limit, 0.0);
Camaro camaro = new Camaro(3000, 1967, Color.BLUE);
CamaroInsurance camaroPolicy = (CamaroInsurance) camaroInsuranceFactory.create(camaro, 800.0d);
assertEquals(800.0d, camaroPolicy.premium, 0.0);
assertEquals(100000.0d, camaroPolicy.limit, 0.0);
}
public interface InsuranceFactory<T extends Car> {
public Insurance<T> create(T car, double premium);
}
public void testAssistedFactoryForParameterizedType() {
final TypeLiteral<InsuranceFactory<Mustang>> mustangInsuranceFactoryType =
new TypeLiteral<InsuranceFactory<Mustang>>() {};
final TypeLiteral<InsuranceFactory<Camaro>> camaroInsuranceFactoryType =
new TypeLiteral<InsuranceFactory<Camaro>>() {};
Injector injector =
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(Double.class).annotatedWith(Names.named("lowLimit")).toInstance(50000.0d);
bind(Double.class).annotatedWith(Names.named("highLimit")).toInstance(100000.0d);
bind(mustangInsuranceFactoryType)
.toProvider(
FactoryProvider.newFactory(
mustangInsuranceFactoryType, TypeLiteral.get(MustangInsurance.class)));
bind(camaroInsuranceFactoryType)
.toProvider(
FactoryProvider.newFactory(
camaroInsuranceFactoryType, TypeLiteral.get(CamaroInsurance.class)));
}
});
InsuranceFactory<Mustang> mustangInsuranceFactory =
injector.getInstance(Key.get(mustangInsuranceFactoryType));
InsuranceFactory<Camaro> camaroInsuranceFactory =
injector.getInstance(Key.get(camaroInsuranceFactoryType));
Mustang mustang = new Mustang(5000d, Color.BLACK);
MustangInsurance mustangPolicy =
(MustangInsurance) mustangInsuranceFactory.create(mustang, 800.0d);
assertEquals(800.0d, mustangPolicy.premium, 0.0);
assertEquals(50000.0d, mustangPolicy.limit, 0.0);
Camaro camaro = new Camaro(3000, 1967, Color.BLUE);
CamaroInsurance camaroPolicy = (CamaroInsurance) camaroInsuranceFactory.create(camaro, 800.0d);
assertEquals(800.0d, camaroPolicy.premium, 0.0);
assertEquals(100000.0d, camaroPolicy.limit, 0.0);
}
public static class AutoInsurance<T extends Car> implements Insurance<T> {
private final double premium;
private final double limit;
private final T car;
@AssistedInject
public AutoInsurance(double limit, @Assisted T car, @Assisted double premium) {
this.limit = limit;
this.car = car;
this.premium = premium;
}
public void sell() {}
}
public void testAssistedFactoryForTypeVariableParameters() {
final TypeLiteral<InsuranceFactory<Camaro>> camaroInsuranceFactoryType =
new TypeLiteral<InsuranceFactory<Camaro>>() {};
Injector injector =
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(Double.class).toInstance(50000.0d);
bind(camaroInsuranceFactoryType)
.toProvider(
FactoryProvider.newFactory(
camaroInsuranceFactoryType,
new TypeLiteral<AutoInsurance<Camaro>>() {}));
}
});
InsuranceFactory<Camaro> camaroInsuranceFactory =
injector.getInstance(Key.get(camaroInsuranceFactoryType));
Camaro camaro = new Camaro(3000, 1967, Color.BLUE);
AutoInsurance<?> camaroPolicy =
(AutoInsurance<?>) camaroInsuranceFactory.create(camaro, 800.0d);
assertEquals(800.0d, camaroPolicy.premium, 0.0);
assertEquals(50000.0d, camaroPolicy.limit, 0.0);
assertEquals(camaro, camaroPolicy.car);
}
public void testDuplicateAssistedFactoryBinding() {
Injector injector =
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(Double.class).toInstance(5.0d);
bind(ColoredCarFactory.class)
.toProvider(FactoryProvider.newFactory(ColoredCarFactory.class, Mustang.class));
bind(ColoredCarFactory.class)
.toProvider(FactoryProvider.newFactory(ColoredCarFactory.class, Mustang.class));
}
});
ColoredCarFactory carFactory = injector.getInstance(ColoredCarFactory.class);
Mustang blueMustang = (Mustang) carFactory.create(Color.BLUE);
assertEquals(Color.BLUE, blueMustang.color);
assertEquals(5.0d, blueMustang.engineSize, 0.0);
Mustang redMustang = (Mustang) carFactory.create(Color.RED);
assertEquals(Color.RED, redMustang.color);
assertEquals(5.0d, redMustang.engineSize, 0.0);
}
public interface Equals {
enum ComparisonMethod {
SHALLOW,
DEEP;
}
interface Factory {
Equals equals(Equals.ComparisonMethod comparisonMethod);
}
public static class Impl implements Equals {
private final double sigma;
private final ComparisonMethod comparisonMethod;
@Inject
public Impl(double sigma, @Assisted ComparisonMethod comparisonMethod) {
this.sigma = sigma;
this.comparisonMethod = comparisonMethod;
}
}
}
public void testFactoryMethodCalledEquals() {
Injector injector =
Guice.createInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(Double.class).toInstance(0.01d);
bind(Equals.Factory.class)
.toProvider(
FactoryProvider.newFactory(Equals.Factory.class, Equals.Impl.class));
}
});
Equals.Factory equalsFactory = injector.getInstance(Equals.Factory.class);
Equals.Impl shallowEquals = (Impl) equalsFactory.equals(ComparisonMethod.SHALLOW);
assertEquals(ComparisonMethod.SHALLOW, shallowEquals.comparisonMethod);
assertEquals(0.01d, shallowEquals.sigma, 0.0);
}
}