org.apache.bcel.util
public class ClassLoader extends ClassLoader
Drop in replacement for the standard class loader of the JVM. You can use it in conjunction with the JavaWrapper to dynamically modify/create classes as they're requested.
This class loader recognizes special requests in a distinct format, i.e., when the name of the requested class contains with "$$BCEL$$" it calls the createClass() method with that name (everything bevor the $$BCEL$$ is considered to be the package name. You can subclass the class loader and override that method. "Normal" classes class can be modified by overriding the modifyClass() method which is called just before defineClass().
There may be a number of packages where you have to use the default class loader (which may also be faster). You can define the set of packages where to use the system class loader in the constructor. The default value contains "java.", "sun.", "javax."
See Also: JavaWrapper ClassPath
Field Summary | |
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static String[] | DEFAULT_IGNORED_PACKAGES |
Constructor Summary | |
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ClassLoader() Ignored packages are by default ( "java.", "sun.",
"javax."), i.e. loaded by system class loader | |
ClassLoader(ClassLoader deferTo) | |
ClassLoader(String[] ignored_packages) | |
ClassLoader(ClassLoader deferTo, String[] ignored_packages) |
Method Summary | |
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protected JavaClass | createClass(String class_name)
Override this method to create you own classes on the fly. |
protected Class | loadClass(String class_name, boolean resolve) |
protected JavaClass | modifyClass(JavaClass clazz) Override this method if you want to alter a class before it gets actually
loaded. |
Parameters: deferTo delegate class loader to use for ignored packages
Parameters: ignored_packages classes contained in these packages will be loaded with the system class loader
Parameters: ignored_packages classes contained in these packages will be loaded with the system class loader deferTo delegate class loader to use for ignored packages
Parameters: class_name compressed byte code with "$$BCEL$$" in it