Package org.apache.log4j.helpers
Class Loader
- java.lang.Object
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- org.apache.log4j.helpers.Loader
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public class Loader extends java.lang.Object
Load resources (or images) from various sources.
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Constructor Summary
Constructors Constructor Description Loader()
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Method Summary
All Methods Static Methods Concrete Methods Deprecated Methods Modifier and Type Method Description static java.net.URL
getResource(java.lang.String resource)
This method will search forresource
in different places.static java.net.URL
getResource(java.lang.String resource, java.lang.Class clazz)
Deprecated.as of 1.2.private static java.lang.ClassLoader
getTCL()
Get the Thread Context Loader which is a JDK 1.2 feature.static boolean
isJava1()
Are we running under JDK 1.x?static java.lang.Class
loadClass(java.lang.String clazz)
If running under JDK 1.2 load the specified class using theThread
contextClassLoader
if that fails try Class.forname.
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Field Detail
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TSTR
static final java.lang.String TSTR
- See Also:
- Constant Field Values
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java1
private static boolean java1
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ignoreTCL
private static boolean ignoreTCL
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Method Detail
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getResource
public static java.net.URL getResource(java.lang.String resource, java.lang.Class clazz)
Deprecated.as of 1.2.Get a resource by delegating to getResource(String).- Parameters:
resource
- resource nameclazz
- class, ignored.- Returns:
- URL to resource or null.
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getResource
public static java.net.URL getResource(java.lang.String resource)
This method will search forresource
in different places. The search order is as follows:- Search for
resource
using the thread context class loader under Java2. If that fails, search forresource
using the class loader that loaded this class (Loader
). Under JDK 1.1, only the the class loader that loaded this class (Loader
) is used. - Try one last time with
ClassLoader.getSystemResource(resource)
, that is is using the system class loader in JDK 1.2 and virtual machine's built-in class loader in JDK 1.1.
- Search for
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isJava1
public static boolean isJava1()
Are we running under JDK 1.x?
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getTCL
private static java.lang.ClassLoader getTCL() throws java.lang.IllegalAccessException, java.lang.reflect.InvocationTargetException
Get the Thread Context Loader which is a JDK 1.2 feature. If we are running under JDK 1.1 or anything else goes wrong the method returnsnull
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- Throws:
java.lang.IllegalAccessException
java.lang.reflect.InvocationTargetException
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loadClass
public static java.lang.Class loadClass(java.lang.String clazz) throws java.lang.ClassNotFoundException
If running under JDK 1.2 load the specified class using theThread
contextClassLoader
if that fails try Class.forname. Under JDK 1.1 only Class.forName is used.- Throws:
java.lang.ClassNotFoundException
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