Component Filter Assignable : ApplicationContext « Spring « Java Tutorial

1. Java Tutorial
2. Spring
3. ApplicationContext

File: context.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       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">

    <context:component-scan base-package="bean">
        <context:include-filter type="annotation" expression="bean.Magic"/>
        <context:include-filter type="assignable" expression="bean.ComponentMarker"/>
        <context:include-filter type="aspectj" expression="* void bean.*Service*(..)"/>
    </context:component-scan>

</beans>

File: Main.java

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Main {
  public static void main(String[] args) throws Exception {
    ApplicationContext ac = new ClassPathXmlApplicationContext(
        "context.xml");
    String[] beanNames = ac.getBeanDefinitionNames();
    for (String beanName : beanNames) {
      System.out.println(beanName + ": " + ac.getBean(beanName));
    }
  }
}

File: ComponentMarker.java

package bean;


public interface ComponentMarker {
}

File: Magic.java

package bean;


public @interface Magic {
}

File: MarkedBean.java

package bean;


public class MarkedBean implements ComponentMarker {

    @Override
    public String toString() {
        final StringBuilder sb = new StringBuilder();
        sb.append("MarkedBean");
        sb.append("{}");
        return sb.toString();
    }
}

File: SimpleBean.java

package bean;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.util.ObjectUtils;

/**
 * @author janm
 */
@Magic
class SimpleBean {
    private Dependency dependency;

    @Autowired(required = true)
    public void setDependency(Dependency dependency) {
        this.dependency = dependency;
    }

    @Override
    public String toString() {
        final StringBuilder sb = new StringBuilder();
        sb.append("SimpleBean");
        sb.append(ObjectUtils.identityToString(this));
        sb.append("{dependency=").append(dependency);
        sb.append('}');
        return sb.toString();
    }
}
@Component
class Dependency {

    @Override
    public String toString() {
        final StringBuilder sb = new StringBuilder();
        sb.append("Dependency");
        sb.append(ObjectUtils.identityToString(this));
        sb.append("{}");
        return sb.toString();
    }
}

28.2.ApplicationContext
	28.2.1.	ApplicationContext component scan
	28.2.2.	Component Filter Assignable
	28.2.3.	Search By Base Package
	28.2.4.	Implements ApplicationListener
	28.2.5.	Implements ApplicationEvent Publisher Aware
	28.2.6.	Filter By Annotation
	28.2.7.	ApplicationContext Aware
	28.2.8.	ApplicationContext And BeanFactory PostProcessor