[Webinar] Streamline your web hosting managementRegister Today

x
?
Solved

prototype pattern

Posted on 2006-11-23
4
Medium Priority
?
238 Views
Last Modified: 2010-03-31
can any one explain whats prototype pattern in laymans terms (without pointing me to a website :)

a simple example would be appreciated.

also is this pattern  widely used/ rarely used/ never used.

thanks
J
0
Comment
Question by:jaggernat
  • 2
4 Comments
 
LVL 5

Expert Comment

by:gkishoreji
ID: 18005894
if u r familiar with java and the clone() method of an object, then
the object which u are going to clone is the prototype...
0
 
LVL 35

Expert Comment

by:girionis
ID: 18006784
The prototype patterns states that when the creation of an object is too expensive or complex, then you make copies of the original object instead of creating more objects.

For example, if you have a Person object that is created by querying the database several times and you want to create another Person object, instead of doing all the database stuff again, you just clone the first Person object and you get a copy. This is the prototype pattern.
0
 
LVL 10

Author Comment

by:jaggernat
ID: 18008109
is this pattern ever used in real life programming? Is it used in j2ee scenario?

thanks
0
 
LVL 35

Accepted Solution

by:
girionis earned 2000 total points
ID: 18017716
Yes, it is and I have used it personally in the exampel I mentioned above. We had a Customer object that was very complicated and we needed to return it to the caller. This Customer object had loads of information inside it, it had an Address object, a BillingAccount object, an Order object, a Visit object etc. Each one of them was taken from the database and we had different queries, for instance one query for the customer itself, another for the address, another for the billing account etc. As you could see it was very expensive and time consuming. Later in the flow of the application we needed to create a customer instance, which would be the same customer with only a couple of fields different. Instead of querying the database again for the information we just used the prototype pattern and cloned the original Customer object. Then we made the changes in the secon d object. This saved us tremendous effort in system resources and execution time.
0

Featured Post

Hire Technology Freelancers with Gigs

Work with freelancers specializing in everything from database administration to programming, who have proven themselves as experts in their field. Hire the best, collaborate easily, pay securely, and get projects done right.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Java had always been an easily readable and understandable language.  Some relatively recent changes in the language seem to be changing this pretty fast, and anyone that had not seen any Java code for the last 5 years will possibly have issues unde…
Basic understanding on "OO- Object Orientation" is needed for designing a logical solution to solve a problem. Basic OOAD is a prerequisite for a coder to ensure that they follow the basic design of OO. This would help developers to understand the b…
Video by: Michael
Viewers learn about how to reduce the potential repetitiveness of coding in main by developing methods to perform specific tasks for their program. Additionally, objects are introduced for the purpose of learning how to call methods in Java. Define …
This tutorial explains how to use the VisualVM tool for the Java platform application. This video goes into detail on the Threads, Sampler, and Profiler tabs.
Suggested Courses
Course of the Month10 days, 6 hours left to enroll

591 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question