com.googelcode.jpractices.common.SalaryHighPredicate.java Source code

Introduction

Here is the source code for com.googelcode.jpractices.common.SalaryHighPredicate.java

Source

    package com.googelcode.jpractices;

    import java.io.Serializable;

    import org.apache.commons.collections.Predicate;

/**
 * Copyright 2009 @ jPractices v 1.0
 * @SVN URL : http://jpractices.googlecode.com
 * @author Ganesh Gowtham
 * @Homepage : http://ganesh.gowtham.googlepages.com
 * @description This Predicate is responsible in selecting the salary greater than iValue
 */

public class SalaryHighPredicate implements Predicate, Serializable {

   /** Serial version UID */
   private static final long serialVersionUID = 5633766978029907089L;

   /** The value to compare to */
   private final int iValue;

   public SalaryHighPredicate(int salary) {
      super();
      iValue = salary;
   }

   /**
    * returns true when the salary is >= iValue
    */
   public boolean evaluate(Object object) {
      if (object instanceof Integer) {
         //System.err.println("oops");
         int value = Integer.parseInt(object.toString());
         return iValue <= value ? true : false;

      } else {
         // worst case wont happend :-)
         System.err.println("pls check whether passed attribute type");
         return false;
      }
   }

}--------------------------------------------------------------------------------------------------------------------------------------------------------------

    package com.googelcode.jpractices;

    import java.util.ArrayList;
    import java.util.Collection;
    import java.util.List;

    import org.apache.commons.beanutils.BeanPredicate;
    import org.apache.commons.collections.CollectionUtils;

    import com.googelcode.jpractices.common.Person;

/**
 * Copyright 2009 @ jPractices v 1.0
 * @SVN URL : http://jpractices.googlecode.com
 * @author Ganesh Gowtham
 * @Homepage : http://ganesh.gowtham.googlepages.com
 * @Description : Writing the own predicate to filter the person objects whose salary is
 *             greater than 26000
 */
public class CustomPredicateExample {
   List<Person> personList = new ArrayList<Person>();

   /**
    * Basic method which creates the list of person object's
    */
   void setUpData() {
      personList.add(new Person("ganesh", "gowtham", 25000));
      personList.add(new Person("britney", "spears", 45000));
      personList.add(new Person("ganesh", "tom", 35000));
      personList.add(new Person("sunny", "dummy", 45000));
   }

   void filterCollection(int salary)
   {
      SalaryHighPredicate nameEqlPredicate = new SalaryHighPredicate(salary);
      BeanPredicate beanPredicate = new BeanPredicate("salary", nameEqlPredicate);
      Collection<Person> filteredCollection = CollectionUtils
               .select(personList, beanPredicate);
      System.out.println("Shows the person object whose salary is >= 26,000 ");
      for (Person person : filteredCollection) {
         System.out.println(person);
      }
   }
   public static void main(String[] args) {

      CustomPredicateExample example = new CustomPredicateExample();
      example.setUpData();
      example.filterCollection(26000);
   }
}---------------------------------------------------------------------------------------------------------------------------------------------------------

package com.googelcode.jpractices.common;

import org.apache.commons.lang.builder.ToStringBuilder;

/**
 * Copyright 2009 @ jPractices v 1.0
 * @SVN URL : http://jpractices.googlecode.com
 * @author Ganesh Gowtham
 * @Homepage : http://ganesh.gowtham.googlepages.com
 */

public class Person {
   private String firstName;

   private String lastName;

   private int salary;

   public Person(String firstName, String lastName, int salary) {
      super();
      this.firstName = firstName;
      this.lastName = lastName;
      this.salary = salary;
   }

   public String getFirstName() {
      return firstName;
   }

   public void setFirstName(String firstName) {
      this.firstName = firstName;
   }

   public String getLastName() {
      return lastName;
   }

   public void setLastName(String lastName) {
      this.lastName = lastName;
   }

   public int getSalary() {
      return salary;
   }

   public void setSalary(int salary) {
      this.salary = salary;
   }

   @Override
   public String toString() {
      return ToStringBuilder.reflectionToString(this);
   }
}