org.eclipse.ocl.examples.codegen.dynamic

Class ExplicitClassLoader

java.lang.Object

java.lang.ClassLoader

org.eclipse.ocl.examples.codegen.dynamic.ExplicitClassLoader

public class ExplicitClassLoader
extends java.lang.ClassLoader

ExplicitClassLoader supports loading all classes sharing a qualifiedClassNamePrefix from an explicitClassPath. This may be used to load classes not on the normal classpath or to reload classes that may have changed since previously loaded.

The technical approach of:
load *.class as byte[],
defineClass to transform byte[] to Class

is motivated by http://www.toptal.com/java/java-wizardry-101-a-guide-to-java-class-reloading.

Field Summary

Fields

Modifier and Type	Field and Description
protected java.io.File	explicitClassPath
protected java.lang.ClassLoader	fallBackClassLoader
protected java.lang.String	qualifiedClassNamePrefix

Constructor Summary

Constructors

Constructor and Description
ExplicitClassLoader(java.io.File explicitClassPath, java.lang.String qualifiedClassNamePrefix)
ExplicitClassLoader(java.io.File explicitClassPath, java.lang.String qualifiedClassNamePrefix, java.lang.ClassLoader fallBackClassLoader)

Method Summary

Modifier and Type	Method and Description
protected java.lang.Class<?>	loadClass(java.lang.String name, boolean resolve) Re-implement to load any class sharing qualifiedClassNamePrefix from the explicitClassPath.

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findClass, findLibrary, findLoadedClass, findResource, findResources, findSystemClass, getClassLoadingLock, getPackage, getPackages, getParent, getResource, getResourceAsStream, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, loadClass, registerAsParallelCapable, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

Methods inherited from class java.lang.Object

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

Field Detail

explicitClassPath

@NonNull
protected final java.io.File explicitClassPath

qualifiedClassNamePrefix

@NonNull
protected final java.lang.String qualifiedClassNamePrefix

fallBackClassLoader

@Nullable
protected final java.lang.ClassLoader fallBackClassLoader

Constructor Detail

ExplicitClassLoader

public ExplicitClassLoader(@NonNull
                           java.io.File explicitClassPath,
                           @NonNull
                           java.lang.String qualifiedClassNamePrefix)

ExplicitClassLoader

public ExplicitClassLoader(@NonNull
                           java.io.File explicitClassPath,
                           @NonNull
                           java.lang.String qualifiedClassNamePrefix,
                           @Nullable
                           java.lang.ClassLoader fallBackClassLoader)

Method Detail

loadClass

protected java.lang.Class<?> loadClass(java.lang.String name,
                                       boolean resolve)
                                throws java.lang.ClassNotFoundException

Re-implement to load any class sharing qualifiedClassNamePrefix from the explicitClassPath. Other classes are loaded normally.

Overrides:

loadClass in class java.lang.ClassLoader

Throws:

java.lang.ClassNotFoundException