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BAEL-3965: Created examples for instance and static factory methods.

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This commit is contained in:
Justin Albano 2020-04-18 11:48:26 -04:00
parent ca443a08a3
commit 374905467e
14 changed files with 228 additions and 0 deletions
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18
spring-core-3/src/main/java/com/baeldung/factorymethod/Bar.java Normal file
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package com.baeldung.factorymethod;
public class Bar {
private String name;
public Bar(String name) {
this.name = name;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}

5
spring-core-3/src/main/java/com/baeldung/factorymethod/Foo.java Normal file
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package com.baeldung.factorymethod;
public class Foo {
}

8
spring-core-3/src/main/java/com/baeldung/factorymethod/InstanceBarFactory.java Normal file
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package com.baeldung.factorymethod;
public class InstanceBarFactory {
public Bar createInstance(String name) {
return new Bar(name);
}
}

8
spring-core-3/src/main/java/com/baeldung/factorymethod/InstanceFooFactory.java Normal file
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package com.baeldung.factorymethod;
public class InstanceFooFactory {
public Foo createInstance() {
return new Foo();
}
}

11
spring-core-3/src/main/java/com/baeldung/factorymethod/SingletonBarFactory.java Normal file
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package com.baeldung.factorymethod;
public class SingletonBarFactory {
private static final Bar INSTANCE = new Bar("unnamed");
public static Bar createInstance(String name) {
INSTANCE.setName(name);
return INSTANCE;
}
}

10
spring-core-3/src/main/java/com/baeldung/factorymethod/SingletonFooFactory.java Normal file
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package com.baeldung.factorymethod;
public class SingletonFooFactory {
private static final Foo INSTANCE = new Foo();
public static Foo createInstance() {
return INSTANCE;
}
}

24
spring-core-3/src/test/java/com/baeldung/factorymethod/InstanceBarFactoryIntegrationTest.java Normal file
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package com.baeldung.factorymethod;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("/factorymethod/instance-bar-config.xml")
public class InstanceBarFactoryIntegrationTest {
@Autowired
private Bar instance;
@Test
public void givenValidInstanceFactoryConfig_whenCreateInstance_thenNameIsCorrect() {
assertNotNull(instance);
assertEquals("someName", instance.getName());
}
}

22
spring-core-3/src/test/java/com/baeldung/factorymethod/InstanceFooFactoryIntegrationTest.java Normal file
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package com.baeldung.factorymethod;
import static org.junit.Assert.assertNotNull;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("/factorymethod/instance-foo-config.xml")
public class InstanceFooFactoryIntegrationTest {
@Autowired
private Foo foo;
@Test
public void givenValidInstanceFactoryConfig_whenCreateFooInstance_thenInstanceIsNotNull() {
assertNotNull(foo);
}
}

24
spring-core-3/src/test/java/com/baeldung/factorymethod/SingletonBarFactoryIntegrationTest.java Normal file
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package com.baeldung.factorymethod;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("/factorymethod/static-bar-config.xml")
public class SingletonBarFactoryIntegrationTest {
@Autowired
private Bar instance;
@Test
public void givenValidStaticFactoryConfig_whenCreateInstance_thenNameIsCorrect() {
assertNotNull(instance);
assertEquals("someName", instance.getName());
}
}

22
spring-core-3/src/test/java/com/baeldung/factorymethod/SingletonFooFactoryIntegrationTest.java Normal file
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package com.baeldung.factorymethod;
import static org.junit.Assert.assertNotNull;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("/factorymethod/static-foo-config.xml")
public class SingletonFooFactoryIntegrationTest {
@Autowired
private Foo singleton;
@Test
public void givenValidStaticFactoryConfig_whenCreateInstance_thenInstanceIsNotNull() {
assertNotNull(singleton);
}
}

20
spring-core-3/src/test/resources/factorymethod/instance-bar-config.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util.xsd">
<bean id="instanceBarFactory"
class="com.baeldung.factorymethod.InstanceBarFactory" />
<bean id="bar"
factory-bean="instanceBarFactory"
factory-method="createInstance">
<constructor-arg value="someName" />
</bean>
</beans>

18
spring-core-3/src/test/resources/factorymethod/instance-foo-config.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util.xsd">
<bean id="instanceFooFactory"
class="com.baeldung.factorymethod.InstanceFooFactory" />
<bean id="foo"
factory-bean="instanceFooFactory"
factory-method="createInstance" />
</beans>

20
spring-core-3/src/test/resources/factorymethod/static-bar-config.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util.xsd">
<bean id="bar"
class="com.baeldung.factorymethod.SingletonBarFactory"
factory-method="createInstance">
<constructor-arg value="someName" />
</bean>
</beans>

18
spring-core-3/src/test/resources/factorymethod/static-foo-config.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util.xsd">
<bean id="foo"
class="com.baeldung.factorymethod.SingletonFooFactory"
factory-method="createInstance" />
</beans>