Package org.openxava.util

Class Factory

  • public class Factory
extends java.lang.Object
    Generic class to implement object factories.

    The classes are in a properties file with name=class formate. Where nombre is a identifier and class the class of object to create, which must to have a default constructor.

    If the class implements IInit then the method IInit.init(java.lang.String) is called after creation.
    Exists a entry that is assumed as default entry. This entry is used when you call to create() without arguments.
    The default entry can be defined on create the factory or if not the entry _default/_defecto is assumed.
    A example of properties file is: 

     _defecto=rapido
 rapido=miempresa.miapp.paquete1.MiClaseRapida
 lento=miempresa.miapp.paquete1.MiClaseLenta
    Or in english _default=fast fast=mycorp.myapp.package1.MyFastClass slow=mycorp.myapp.package1.MySlowClass
    Author:
    Javier Paniza

    • Constructor Summary

      Constructors 
      Constructor Description
      Factory​(java.net.URL propertiesFile)
      Creates a objects factory from a properties files.
      Factory​(java.net.URL propertiesFile, java.lang.String defaultEntry)
      Creates a object factory from a properties file, sending the entry that indicate the default entry.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.lang.Object create()
      Create a default object.
      java.lang.Object create​(java.lang.String name)
      Create the indicate object.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • Factory

        public Factory​(java.net.URL propertiesFile)
        Creates a objects factory from a properties files.

        The entry that indicate the default entry is _defecto or _default.
        Preconditions:

        • propertiesFile != null
        Parameters:
        propertiesFile - File URL withn pairs names/classes

      • Factory

        public Factory​(java.net.URL propertiesFile,
               java.lang.String defaultEntry)
        Creates a object factory from a properties file, sending the entry that indicate the default entry.

        Preconditions:

        • propertiesFile != null
        Parameters:
        propertiesFile - File URL with pairs names/classes
        defaultEntry - Indicante what entry will be used as default entry, si if is null _defecto/_default is used.

    • Method Detail

      • create

        public java.lang.Object create()
                        throws InitException
        Create a default object.

        Postcondition:

        • return != null
        does it as indicate in the entry default in properties file.
        Throws:
        InitException - Some problem on init

      • create

        public java.lang.Object create​(java.lang.String name)
                        throws InitException
        Create the indicate object.

        Postcondition:

        • return != null
        Parameters:
        name - Identifier name, which is registered in properties
        Throws:
        InitException - Si hay algún problema el iniciar.