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 Tools and Libs > SOJO > Get Complex Nested Property

Get Complex Nested Property 

SOJO (Simplified Old Java Objects) is a Java framework which converts object graph into a specific structure or representation. This requires the library sojo-1.0.0.jar to be in classpath. The following example shows using PathExecuter.getNestedProperty() API.

File Name  :  
com/bethecoder/tutorials/sojo/common/Student.java 
   
package com.bethecoder.tutorials.sojo.common;

public class Student {

  private String name;
  private int age;
  private String hobby;

  public Student() {
  }

  public Student(String name, int age, String hobby) {
    super();
    this.name = name;
    this.age = age;
    this.hobby = hobby;
  }

  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }
  public int getAge() {
    return age;
  }
  public void setAge(int age) {
    this.age = age;
  }
  public String getHobby() {
    return hobby;
  }
  public void setHobby(String hobby) {
    this.hobby = hobby;
  }
  
  public String toString() {
    return "Student[name = " + name + ", age = " + age + ", hobby = " + hobby + "]";
  }
}
   

File Name  :  
com/bethecoder/tutorials/sojo/common/ComplexBean.java 
   
package com.bethecoder.tutorials.sojo.common;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class ComplexBean {

  private List<Student> studentList = new ArrayList<Student>();
  private Map<String, List<Student>> subjectStudentMap = new HashMap<String, List<Student>>();
  
  public List<Student> getStudentList() {
    return studentList;
  }
  public void setStudentList(List<Student> studentList) {
    this.studentList = studentList;
  }
  public Map<String, List<Student>> getSubjectStudentMap() {
    return subjectStudentMap;
  }
  public void setSubjectStudentMap(Map<String, List<Student>> subjectStudentMap) {
    this.subjectStudentMap = subjectStudentMap;
  }
}
   

File Name  :  
com/bethecoder/tutorials/sojo/tests/GetComplexNestedOGN.java 
Author  :  Sudhakar KV
Email  :  [email protected]
   
package com.bethecoder.tutorials.sojo.tests;

import java.io.IOException;
import java.util.Arrays;

import net.sf.sojo.navigation.PathExecuter;

import com.bethecoder.tutorials.sojo.common.ComplexBean;
import com.bethecoder.tutorials.sojo.common.Student;

public class GetComplexNestedOGN {

  /**
   * @param args
   */
  public static void main(String[] args) throws IOException {
    
    Student student = new Student("Sriram", 2, "Chess");
    Student student2 = new Student("Sudhakar", 29, "Painting");
    Student student3 = new Student("Charan", 18, "Reading books");
    
    ComplexBean complexBean = new ComplexBean();
    complexBean.getStudentList().addAll(Arrays.asList(student, student2, student3));
    complexBean.getSubjectStudentMap().put("MATHS", 
        Arrays.asList(student, student2, student3));
    
    complexBean.getSubjectStudentMap().put("PHYSICS", 
        Arrays.asList(student, student2));
    
    System.out.println(PathExecuter.getNestedProperty(complexBean, "studentList"));
    System.out.println(PathExecuter.getNestedProperty(complexBean, "studentList[0].name"));
    
    System.out.println(PathExecuter.getNestedProperty(complexBean, "subjectStudentMap.MATHS"));
    System.out.println(PathExecuter.getNestedProperty(complexBean, "subjectStudentMap.MATHS[1]"));
    System.out.println(PathExecuter.getNestedProperty(complexBean, "subjectStudentMap.MATHS[2].name"));
    
    
    System.out.println(PathExecuter.getNestedProperty(complexBean, "subjectStudentMap(MATHS)"));
    System.out.println(PathExecuter.getNestedProperty(complexBean, "subjectStudentMap(MATHS).[0]"));
    System.out.println(PathExecuter.getNestedProperty(complexBean, "subjectStudentMap(MATHS).[1].name"));
  }
}
   

It gives the following output, 
[Student[name = Sriram, age = 2, hobby = Chess], 
	Student[name = Sudhakar, age = 29, hobby = Painting], 
	Student[name = Charan, age = 18, hobby = Reading books]]
Sriram

[Student[name = Sriram, age = 2, hobby = Chess], 
	Student[name = Sudhakar, age = 29, hobby = Painting], 
	Student[name = Charan, age = 18, hobby = Reading books]]
Student[name = Sudhakar, age = 29, hobby = Painting]
Charan

[Student[name = Sriram, age = 2, hobby = Chess], 
	Student[name = Sudhakar, age = 29, hobby = Painting], 
	Student[name = Charan, age = 18, hobby = Reading books]]
Student[name = Sriram, age = 2, hobby = Chess]
Sudhakar



 
  


  
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