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Spring Framework - DirectFieldAccessor Examples

Spring Framework 

DirectFieldAccessor can be used to read and write fields without setters and getters. 

package com.logicbig.example.directfieldAccessor;

import org.springframework.beans.DirectFieldAccessor;

public class DirectFieldAccessorExample {

    public static void main (String[] args) {
        DirectFieldAccessor a = new DirectFieldAccessor(new LocalBean());
        a.setPropertyValue("str", "setting a direct value");
        System.out.println(a.getWrappedInstance());
    }

    private static class LocalBean {
        private String str;

        @Override
        public String toString () {
            return "LocalBean{" +
                                "str='" + str + '\'' +
                                '}';
        }
    }
}

Output

LocalBean{str='setting a direct value'}




DirectFieldAccessor can be used to read and write fields without setters and getters. 

package com.logicbig.example;

import org.springframework.beans.DirectFieldAccessor;

public class DirectFieldAccessorExample {

    public static void main (String[] args) {
        DirectFieldAccessor fieldAccessor = new DirectFieldAccessor(new Person());
        fieldAccessor.setPropertyValue("name", "Mike");
        fieldAccessor.setPropertyValue("age", "32");
        Object person = fieldAccessor.getWrappedInstance();
        System.out.println(person);
    }

}

Output

Person{name='Mike', age=32}
Original Post




DirectFieldAccessor can be used to read and write fields without setters and getters. 

package com.logicbig.example;

import org.springframework.beans.DirectFieldAccessor;
import java.util.ArrayList;

public class DirectFieldAccessorNestedFieldsExample {

    public static void main (String[] args) {
        DirectFieldAccessor fieldAccessor = new DirectFieldAccessor(new PersonGroup());
        fieldAccessor.setPropertyValue("groupName", "BaseballTeam");
        fieldAccessor.setPropertyValue("personList", new ArrayList<>());

        fieldAccessor.setPropertyValue("personList[0]", new Person());
        fieldAccessor.setPropertyValue("personList[0].name", "Mike");
        fieldAccessor.setPropertyValue("personList[0].age", 24);

        fieldAccessor.setPropertyValue("personList[1]", new Person());
        fieldAccessor.setPropertyValue("personList[1].name", "Raj");
        fieldAccessor.setPropertyValue("personList[1].age", 26);

        Object personGroup = fieldAccessor.getWrappedInstance();
        System.out.println(personGroup);
    }

}

Output

PersonGroup{groupName='BaseballTeam', personList=[Person{name='Mike', age=24}, Person{name='Raj', age=26}]}
Original Post

See Also