Preventing a Bean Property from Being Serialized to XML - Java Object Oriented Design

Java examples for Object Oriented Design:Java Bean

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Description

Preventing a Bean Property from Being Serialized to XML

Demo Code


import java.beans.BeanInfo;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.beans.XMLEncoder;
import java.io.BufferedOutputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;

public class Main {
  public static void main(String[] args) {
    // Create an object and set properties
    MyClass2 o = new MyClass2();
    o.setProp(1);/* www  . jav a  2s. c o m*/
    o.setProps(new int[] { 1, 2, 3 });

    try {
      // Serialize object into XML.
      // props is transient so it will not be persisted.
      XMLEncoder encoder = new XMLEncoder(new BufferedOutputStream(
          new FileOutputStream("outfilename.xml")));
      encoder.writeObject(o);
      encoder.close();
    } catch (FileNotFoundException e) {
    }
  }

}

class MyClass2 {
  // The prop property
  int i;

  public int getProp() {
    return i;
  }

  public void setProp(int i) {
    this.i = i;
  }

  // The props property
  int[] iarray = new int[0];

  public int[] getProps() {
    return iarray;
  }

  public void setProps(int[] iarray) {
    this.iarray = iarray;
  }

  static {
    try {
      // Make the props property transient
      BeanInfo info = Introspector.getBeanInfo(MyClass2.class);
      PropertyDescriptor[] propertyDescriptors = info.getPropertyDescriptors();
      for (int i = 0; i < propertyDescriptors.length; ++i) {
        PropertyDescriptor pd = propertyDescriptors[i];
        if (pd.getName().equals("props")) {
          pd.setValue("transient", Boolean.TRUE);
        }
      }
    } catch (IntrospectionException e) {
    }
  }
}

Result


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