Class Compiler.CompilerIClassLoader

java.lang.Object

org.codehaus.janino.IClassLoader

org.codehaus.janino.Compiler.CompilerIClassLoader

Enclosing class:

Compiler

private class Compiler.CompilerIClassLoader
extends IClassLoader

A specialized IClassLoader that loads IClasses from the following sources:

1. An already-parsed compilation unit
2. A class file in the output directory (if existent and younger than source file)
3. A source file in any of the source path directories
4. The parent class loader

Notice that the Compiler.CompilerIClassLoader is an inner class of Compiler and heavily uses Compiler's members.

Field Summary

Fields

Modifier and Type	Field	Description
private final ResourceFinder	classFileFinder
private final ResourceFinder	sourceFinder

Fields inherited from class IClassLoader

CTOR_java_lang_StringBuilder__java_lang_String, METH_java_lang_Enum__ordinal, METH_java_lang_Iterable__iterator, METH_java_lang_String__concat__java_lang_String, METH_java_lang_String__equals__java_lang_Object, METH_java_lang_String__hashCode, METH_java_lang_String__valueOf__boolean, METH_java_lang_String__valueOf__char, METH_java_lang_String__valueOf__double, METH_java_lang_String__valueOf__float, METH_java_lang_String__valueOf__int, METH_java_lang_String__valueOf__java_lang_Object, METH_java_lang_String__valueOf__long, METH_java_lang_StringBuilder__append__boolean, METH_java_lang_StringBuilder__append__char, METH_java_lang_StringBuilder__append__double, METH_java_lang_StringBuilder__append__float, METH_java_lang_StringBuilder__append__int, METH_java_lang_StringBuilder__append__java_lang_Object, METH_java_lang_StringBuilder__append__java_lang_String, METH_java_lang_StringBuilder__append__long, METH_java_lang_StringBuilder__toString, METH_java_lang_Throwable__addSuppressed, METH_java_util_Iterator__hasNext, METH_java_util_Iterator__next, TYPE_java_io_Serializable, TYPE_java_lang_annotation_Retention, TYPE_java_lang_AssertionError, TYPE_java_lang_Boolean, TYPE_java_lang_Byte, TYPE_java_lang_Character, TYPE_java_lang_Class, TYPE_java_lang_Cloneable, TYPE_java_lang_Double, TYPE_java_lang_Enum, TYPE_java_lang_Error, TYPE_java_lang_Exception, TYPE_java_lang_Float, TYPE_java_lang_Integer, TYPE_java_lang_Iterable, TYPE_java_lang_Long, TYPE_java_lang_Object, TYPE_java_lang_Override, TYPE_java_lang_RuntimeException, TYPE_java_lang_Short, TYPE_java_lang_String, TYPE_java_lang_StringBuilder, TYPE_java_lang_System, TYPE_java_lang_Throwable, TYPE_java_lang_Void, TYPE_java_util_Iterator

Constructor Summary

Constructors

Constructor	Description
CompilerIClassLoader(ResourceFinder sourceFinder, ResourceFinder classFileFinder, IClassLoader parentIClassLoader)

Method Summary

Modifier and Type	Method	Description
private IClass	defineIClassFromClassFileResource(Resource classFileResource)	Opens the given classFileResource, reads its contents, defines it in the IClassLoader, and resolves it (this step may involve loading more classes).
private IClass	defineIClassFromSourceResource(Resource sourceResource, String className)	Parses the compilation unit stored in the given sourceResource, remembers it in Compiler.this.parsedCompilationUnits (it may declare other classes that are needed later), finds the declaration of the type with the given className, and defines it in the IClassLoader.
protected IClass	findIClass(String type)	Finds a new IClass by descriptor and calls IClassLoader.defineIClass(IClass).

Methods inherited from class IClassLoader

createJavacLikePathIClassLoader, defineIClass, getArrayIClass, getArrayIClass, getParentIClassLoader, loadIClass, postConstruct

Methods inherited from class Object

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

Field Details

sourceFinder

private final ResourceFinder sourceFinder

classFileFinder

@Nullable
private final ResourceFinder classFileFinder

Constructor Details

CompilerIClassLoader

CompilerIClassLoader(ResourceFinder sourceFinder,
 @Nullable
 ResourceFinder classFileFinder,
 IClassLoader parentIClassLoader)

Parameters:

sourceFinder - Where to look for more source files

classFileFinder - Where to look for previously generated .class resources, or ICompiler.FIND_NEXT_TO_SOURCE_FILE

parentIClassLoader - IClassLoader through which IClasses are to be loaded

Method Details

findIClass

@Nullable
protected IClass findIClass(String type)
                     throws ClassNotFoundException

Description copied from class: IClassLoader

Finds a new IClass by descriptor and calls IClassLoader.defineIClass(IClass).

Similar ClassLoader.findClass(java.lang.String), this method must

• Get an IClass object from somewhere for the given type
• Call IClassLoader.defineIClass(IClass) with that IClass object as the argument
• Return the IClass object

The format of a descriptor is defined in JVMS 4.3.2. Typical descriptors are:

• I (Integer)
• Lpkg1/pkg2/Clazz; (Class declared in package)
• Lpkg1/pkg2/Outer$Inner; Member class

Notice that this method is never called for array types.

Notice that this method is never called from more than one thread at a time. In other words, implementations of this method need not be thread-safe.

Specified by:

findIClass in class IClassLoader

Parameters:

type - field descriptor of the IClass to load, e.g. "Lpkg1/pkg2/Outer$Inner;"

Returns:

null if a the type could not be found

Throws:

ClassNotFoundException - An exception was raised while loading the IClass

defineIClassFromSourceResource

private IClass defineIClassFromSourceResource(Resource sourceResource,
 String className)
                                       throws ClassNotFoundException

Parses the compilation unit stored in the given sourceResource, remembers it in Compiler.this.parsedCompilationUnits (it may declare other classes that are needed later), finds the declaration of the type with the given className, and defines it in the IClassLoader.

Notice that the compilation unit is not compiled here!

Throws:

ClassNotFoundException

defineIClassFromClassFileResource

private IClass defineIClassFromClassFileResource(Resource classFileResource)
                                          throws ClassNotFoundException

Opens the given classFileResource, reads its contents, defines it in the IClassLoader, and resolves it (this step may involve loading more classes).

Throws:

ClassNotFoundException