com.altair.hwm.beans.utils
Class HWMClassLoader

java.lang.Object
  com.altair.hwm.beans.utils.HWMClassLoader

public class HWMClassLoader
extends java.lang.Object

Title: HWMClassLoader

Description: This class will be the util class to load the beans. This is required because the bean class may not be in the classpath. It will use the URL Class loader to load it from a jar file.

Company: Altair Engineering, Inc.

Constructor Summary

HWMClassLoader()
This default constructor will add all the jars to the CP from the system CP and from the lib dir

HWMClassLoader(HWMClassLoader hwmClassLoader)
This constructor will take a previously created class loader and set it as the parent class loader

Method Summary

void	AddJarsFromCP(java.lang.String strClassPath) Extracts the jars from the classpath and adds it to the URL class loader
java.net.URLClassLoader	AddToClassPath(java.lang.String strClassPath) Adds the given path to the class loader
java.net.URLClassLoader	AddToClassPath(java.lang.String[] arrstrClassPath) Adds the given path to the class loader
java.lang.String	GetClasspath() Returns the claspath to use while compiling the adapter classes
com.altair.hwm.beans.utils.HWMURLClassLoader	GetURLClassLoader() Returns the URL class loader
java.lang.Class	LoadClass(java.lang.String strBeanClassName) Loads the given class name by using a url class loader and searching in the jar files set until now
java.lang.Class	LoadClass(java.lang.String strBeanClassName, java.lang.String strFileName) Loads the given class name by using a url class loader and searching in the jar file given
java.lang.Class	LoadClassFromFile(java.lang.String strBeanClassName, java.lang.String strFileName) Loads the class using the HWMURLClassLoader.
void	PrintURLSHandled() Prints out the URLs handled by this URL class loader

Methods inherited from class java.lang.Object

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

Constructor Detail

HWMClassLoader

public HWMClassLoader(HWMClassLoader hwmClassLoader)

This constructor will take a previously created class loader and set it as the parent class loader

Parameters:

hwmClassLoader - The parent class loader

HWMClassLoader

public HWMClassLoader()

This default constructor will add all the jars to the CP from the system CP and from the lib dir

Method Detail

AddJarsFromCP

public void AddJarsFromCP(java.lang.String strClassPath)

Extracts the jars from the classpath and adds it to the URL class loader

Parameters:

strClassPath - The system class path

AddToClassPath

public java.net.URLClassLoader AddToClassPath(java.lang.String strClassPath)
                                       throws java.net.MalformedURLException,
                                              java.lang.SecurityException

Adds the given path to the class loader

Parameters:

strClassPath - The jar file name or a class path to a java class

Returns:

URLClassLoader The URL class loader with updated classpath

Throws:

MalformedURLException, - SecurityException

java.net.MalformedURLException

java.lang.SecurityException

AddToClassPath

public java.net.URLClassLoader AddToClassPath(java.lang.String[] arrstrClassPath)
                                       throws java.net.MalformedURLException,
                                              java.lang.SecurityException

Adds the given path to the class loader

Parameters:

arrStrClassPath - The array of jar file names or class paths to a java class

Returns:

URLClassLoader The URL class loader with updated classpath

Throws:

MalformedURLException, - SecurityException

java.net.MalformedURLException

java.lang.SecurityException

LoadClassFromFile

public java.lang.Class LoadClassFromFile(java.lang.String strBeanClassName,
                                         java.lang.String strFileName)
                                  throws java.lang.ClassNotFoundException,
                                         java.net.MalformedURLException,
                                         java.lang.SecurityException

Loads the class using the HWMURLClassLoader. This is needed because we need to read the byte code and define the class.

Parameters:

strBeanClassName - The class name to be loaded

strFileName - The absolute file name of the java class

Returns:

Class The required "Class" object

Throws:

java.lang.ClassNotFoundException - MalformedURLException, SecurityException

java.net.MalformedURLException

java.lang.SecurityException

GetClasspath

public java.lang.String GetClasspath()

Returns the claspath to use while compiling the adapter classes

Returns:

String Classpath

LoadClass

public java.lang.Class LoadClass(java.lang.String strBeanClassName,
                                 java.lang.String strFileName)
                          throws java.lang.ClassNotFoundException,
                                 java.net.MalformedURLException,
                                 java.lang.SecurityException

Loads the given class name by using a url class loader and searching in the jar file given

Parameters:

strBeanClassName - The class name of the bean

strFileName - The jar file name or path where the given class may be found

Returns:

Class The required "Class" object

Throws:

java.lang.ClassNotFoundException - MalformedURLException, SecurityException

java.net.MalformedURLException

java.lang.SecurityException

LoadClass

public java.lang.Class LoadClass(java.lang.String strBeanClassName)
                          throws java.lang.ClassNotFoundException,
                                 java.net.MalformedURLException,
                                 java.lang.SecurityException

Loads the given class name by using a url class loader and searching in the jar files set until now

Parameters:

strBeanClassName - The class name of the bean

Returns:

Class The required "Class" object

Throws:

java.lang.ClassNotFoundException - MalformedURLException, SecurityException

java.net.MalformedURLException

java.lang.SecurityException

PrintURLSHandled

public void PrintURLSHandled()

Prints out the URLs handled by this URL class loader

GetURLClassLoader

public com.altair.hwm.beans.utils.HWMURLClassLoader GetURLClassLoader()

Returns the URL class loader

Returns:

HWMURLClassLoader The URL class loader