How to disable Spring autowiring for a certain bean?

Question

There are some class in jar (external library), that uses Spring internally. So library class has structure like a:

Answer 1

It seems like it's impossible to disable autowiring for a specific bean.

So there is some workaround. We can make wrapper for a target bean and use it instead of original bean:

public class TestBeanWrapper {

    private final TestBean bean;

    public TestBeanWrapper(TestBean bean) {
        this.bean = bean;
    }

    public TestBean bean() {
        return bean;
    }
}

@Configuration
public class TestConfig {

    @Bean
    public TestBeanWrapper bean() {
        return new TestBeanWrapper(Library.createBean());
    }
}

@RestController
public class TestController {

    @Autowired
    private TestBeanWrapper bean;

    ...
}

Answer 2

Not exactly but you can add required=false (@Autowired(required=false)) in your autowired annotation. But be careful that might get you NullPointer exception

Answer 3

This worked for me:

import org.springframework.beans.factory.FactoryBean;  
...  
@Configuration
public class TestConfig {

    @Bean
    public FactoryBean<TestBean> bean() {
        TestBean bean = Library.createBean();

        return new FactoryBean<TestBean>()
        {
            @Override
            public TestBean getObject() throws Exception
            {
                return bean;
            }

            @Override
            public Class<?> getObjectType()
            {
                return TestBean.class;
            }

            @Override
            public boolean isSingleton()
            {
                return true;
            }
        };
    }
}

Answer 4

Based on @Juan's answer, created a helper to wrap a bean not to be autowired:

public static <T> FactoryBean<T> preventAutowire(T bean) {
    return new FactoryBean<T>() {
        public T getObject() throws Exception {
            return bean;
        }

        public Class<?> getObjectType() {
            return bean.getClass();
        }

        public boolean isSingleton() {
            return true;
        }
    };
}

...

@Bean
static FactoryBean<MyBean> myBean() {
    return preventAutowire(new MyBean());
}