com.tibco.patterns.qbp

Class DfltLoaderMgr

java.lang.Object

com.tibco.patterns.qbp.DfltLoaderMgr

All Implemented Interfaces:

IQBPLoaderMgr

public class DfltLoaderMgr
extends java.lang.Object
implements IQBPLoaderMgr

Default implementation of the QBP loader manager interface. By Default this returns the standard loader for the current thread. Optionally it can be configured to provide a loader to load a specific class file as long as it is under a specific directory.

Constructor Summary

Constructors

Constructor and Description
DfltLoaderMgr() Default constructor: only loads from standard class path.
DfltLoaderMgr(java.io.File loader_dir) Load from standard class path, or from directories under a specified directory.

Method Summary

Modifier and Type	Method and Description
java.lang.ClassLoader	getLoaderFor(java.lang.String class_name, java.lang.String class_source) Get a class loader for a particular class and source.

Methods inherited from class java.lang.Object

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

Constructor Detail

DfltLoaderMgr

public DfltLoaderMgr()
              throws java.lang.SecurityException

Default constructor: only loads from standard class path. This creates a class loader manager that only loads classes from the default class path; i.e. from the default loader for the current thread.

Throws:

java.lang.SecurityException - if loading classes is not allowed for this thread.

DfltLoaderMgr

public DfltLoaderMgr(java.io.File loader_dir)
              throws java.lang.SecurityException,
                     java.lang.IllegalArgumentException

Load from standard class path, or from directories under a specified directory. This creates a class loader manager that loads classes from the default class path; i.e. from the default loader for the current thread, or from class files located under the specified directory.

Parameters:

loader_dir - the directory we can load from.

Throws:

java.lang.SecurityException - if loading classes is not allowed for this thread.

java.lang.IllegalArgumentException - if loader_dir is null, or not a valid path.

Method Detail

getLoaderFor

public java.lang.ClassLoader getLoaderFor(java.lang.String class_name,
                                          java.lang.String class_source)
                                   throws java.lang.UnsupportedOperationException,
                                          java.lang.IllegalArgumentException,
                                          java.lang.Exception

Get a class loader for a particular class and source.

Specified by:

getLoaderFor in interface IQBPLoaderMgr

Parameters:

class_name - the fully qualified class name

class_source - this identifies a source for the class. This may be left null, in which case this uses the default loader for this thread. If non-null this is a path to the class file.

Returns:

a QBPClasssLoader object to use to load the identified class.

Throws:

java.lang.UnsupportedOperationException - if class_source is non-null and loading from that source is not allowed.

java.lang.IllegalArgumentException - if class_name is null, or loading of that class is not allowed.

java.lang.Exception - on other errors.