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Hints
Below is an example of "How to use @DeclareParents annotation in Spring Framework with Example"
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package com.springexample;
public class Student implements StudentImpl {
private int studentNo;
private String studentName;
public Student(){
this.studentNo = 1001;
this.studentName = "John";
}
public int getStudentNo() {
return studentNo;
}
public void setStudentNo(int studentNo) {
this.studentNo = studentNo;
}
public String getStudentName() {
return studentName;
}
public void setStudentName(String studentName) {
this.studentName = studentName;
}
public void showDetails(){
System.out.println(this.studentNo);
System.out.println(this.studentName);
}
}
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Output
1001
John
Newyork
America
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Download as Zip
Link to download
DeclareParentAnnotationOfAspectJInSpringExample
Hints.
Click on File menu. then click " Download"
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Step.1 Start a Java Project with required jars
- Open Eclipse
- Click on menu New -> Others
- In wizards type "Java Project" and Select "Java Project"
- Click Next
- Enter project name as "DeclareParentAnnotationOfAspectJInSpringExample", then click Next
- Goto Libraries tab, then click on Add External JARs, then select Spring's 21 Framework Jars aopalliance-1.0.jar, aspectjtools-1.6.6.jar and commons-logging-1.1.jar.
- Click Finish.
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Step.2 Project Explorer Preview
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StudentAdditionalDetails.java package com.springexample;
public class StudentAdditionalDetails implements StudentAdditionalDetailsImpl {
private String city;
private String country;
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
public void showAdditionalDetails(){
System.out.println(this.city);
System.out.println(this.country);
}
}
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package com.springexample;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class RunMyProgram {
public static void main(String[] args) {
ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
StudentAdditionalDetailsImpl studentAdditionalDetails = (StudentAdditionalDetailsImpl) context.getBean("studentAdditionalDetails");
((StudentImpl) studentAdditionalDetails).showDetails();
studentAdditionalDetails.showAdditionalDetails();
}
}
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package com.springexample;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.DeclareParents;
import org.springframework.stereotype.Component;
@Component
@Aspect
public class LinkAspects {
@DeclareParents(value="com.springexample.StudentAdditionalDetailsImpl+",defaultImpl=Student.class)
public static StudentImpl studentImpl;
}
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package com.springexample;
public interface StudentImpl {
public void showDetails();
}
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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:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<aop:aspectj-autoproxy />
<context:component-scan base-package="com.springexample" />
<bean id="student" class="com.springexample.Student">
<property name="studentNo" value="1001" />
<property name="studentName" value="John Peter" />
</bean>
<bean id="studentAdditionalDetails" class="com.springexample.StudentAdditionalDetails">
<property name="city" value="Newyork" />
<property name="country" value="America" />
</bean>
</beans>
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StudentAdditionalDetailsImpl.java package com.springexample;
public interface StudentAdditionalDetailsImpl {
public void showAdditionalDetails();
}
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