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lazy loading with hibernate
Lazy load is an implementation of design pattern proxy. Here it is used to reduce memory consumation when we load collection of object. For example when we have two relational class Impiegato and...
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many to many with hibernate
In this article i want show how persist a many to many relationship, whith hibernate and jpa annotation. Leggi tutto... (http://blog.intelly-net.com/java/Hibernate/many-to-many-with-hibernate.html)
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Design pattern decorator and java implementation
what is the problem The design pattern decorator is used in this case: i have some object and i want to add responsability. what is the solution of decorator To solve this problem i can use...
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Design pattern mediator and java implementation
what is the problem I have some object and they need to communitate each other and i want a software that do it the soluzion of mediator The first, not best solution, is programming the objects...
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Design pattern visitor with java reflection
What is the problem I have a collection of object of different type and i want add some behaviour without modify existing classes. More specific i want add different behaviour based on object's type....
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Concurrency pattern: Producer-consumer
What is the problem Basically this pattern solve the problem of a buffer, in which one or more Producer can push a data and one or more Consumer can pull a data. There are a couple of problems that...
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Architectural pattern: publisher-subscriber
Introduction This pattern is also know as ’Observer’ (GoF). The mainly difference is that in architectural patterns there is a distinction for what is a components and what is a connectors. Here i...
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JAXB: binding java with xml
JAXB allow binding between java objects and xml instance. Basically with JAXB you can do 'marshall' and 'unmarshall' operations. Marshall means the process of conversion from java objects to xml...
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SAX xml parser and Java
Summary In this article i want to show - an introduction to sax - a simple use case that dimostrate the basic functionality of SAX - how to validate an xml document with SAX - how to use the filters...
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Quick Sort algorithm with Java and R
Algorithm description Quick description Quick sort is an algorithm to sort elements (we will use a vector) In short, the procedure for sorting is done in this way: i take a vector's element (the...
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