Package com.tonic.parser

Class ClassPool

java.lang.Object

com.tonic.parser.ClassPool

public class ClassPool
extends Object

A pool of parsed ClassFile objects, stored and retrieved by internal name.

Constructor Summary

Constructors

Constructor	Description
ClassPool()	Creates a pool preloaded with the JDK's built-in classes (from the jrt image or rt.jar).
ClassPool(boolean empty)	Creates empty pool without loading built-in classes.

Method Summary

Modifier and Type	Method	Description
ClassFile	createNewClass(String className, int accessFlags)	Creates new empty class with specified name and access flags.
ClassFile	get(String internalName)	Retrieves ClassFile by internal name.
List<ClassFile>	getClasses()
static ClassPool	getDefault()	Returns the shared default pool, lazily created with the JDK's classes loaded.
ClassFile	loadClass(byte[] classData)	Loads class from byte array.
ClassFile	loadClass(InputStream is)	Loads class from InputStream.
void	loadJar(JarFile jar)	Loads all .class files from JAR into pool.
ClassFile	loadPlatformClass(String clazz)	Loads class from platform class loader.
ClassFile	loadSystemClass(String clazz)	Loads class from system class loader.
void	put(ClassFile classFile)	Adds a ClassFile to the pool.
boolean	remove(String internalName)	Removes a ClassFile from the pool by internal name.

Methods inherited from class java.lang.Object

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

Constructor Detail

ClassPool

public ClassPool()
          throws IOException

Creates a pool preloaded with the JDK's built-in classes (from the jrt image or rt.jar).

Throws:

IOException - if reading the JDK class files fails

ClassPool

public ClassPool(boolean empty)

Creates empty pool without loading built-in classes.

Parameters:

empty - ignored parameter to differentiate from default constructor

Method Detail

getDefault

public static ClassPool getDefault()

Returns the shared default pool, lazily created with the JDK's classes loaded.

Returns:

the default ClassPool

getClasses

public List<ClassFile> getClasses()

Returns:

the classes

put

public void put(ClassFile classFile)

Adds a ClassFile to the pool.

Parameters:

classFile - ClassFile to add

remove

public boolean remove(String internalName)

Removes a ClassFile from the pool by internal name.

Parameters:

internalName - internal name (e.g., "java/lang/Object")

Returns:

true if a class was removed, false otherwise

get

public ClassFile get(String internalName)

Retrieves ClassFile by internal name.

Parameters:

internalName - internal name (e.g., "java/lang/Object")

Returns:

ClassFile if found, null otherwise

loadClass

public ClassFile loadClass(byte[] classData)

Loads class from byte array.

Parameters:

classData - complete .class file bytes

Returns:

loaded ClassFile

loadClass

public ClassFile loadClass(InputStream is)
                    throws IOException

Loads class from InputStream.

Parameters:

is - InputStream containing .class file

Returns:

loaded ClassFile

Throws:

IOException - if reading or parsing fails

loadSystemClass

public ClassFile loadSystemClass(String clazz)
                          throws IOException

Loads class from system class loader.

Parameters:

clazz - internal class name (e.g., "java/lang/Object")

Returns:

loaded ClassFile

Throws:

IOException - if loading fails

loadPlatformClass

public ClassFile loadPlatformClass(String clazz)
                            throws IOException

Loads class from platform class loader.

Parameters:

clazz - internal class name (e.g., "java/lang/Object")

Returns:

loaded ClassFile

Throws:

IOException - if loading fails

loadJar

public void loadJar(JarFile jar)
             throws IOException

Loads all .class files from JAR into pool.

Parameters:

jar - JarFile to read

Throws:

IOException - if reading fails

createNewClass

public ClassFile createNewClass(String className,
                                int accessFlags)
                         throws IOException

Creates new empty class with specified name and access flags.

Parameters:

className - internal class name (e.g., "com/tonic/NewClass")

accessFlags - access flags for the class

Returns:

newly created ClassFile

Throws:

IOException - if rebuilding fails

IllegalArgumentException - if name invalid or class exists