org.apache.tapestry5.internal.plastic

## Class PlasticClassPool

- java.lang.Object
- - org.apache.tapestry5.internal.plastic.PlasticClassPool

- All Implemented Interfaces:
    org.apache.tapestry5.internal.plastic.asm.Opcodes, ClassLoaderDelegate, PlasticClassListenerHub

      public class PlasticClassPool
      extends Object
      implements ClassLoaderDelegate, org.apache.tapestry5.internal.plastic.asm.Opcodes, PlasticClassListenerHub

  Responsible for managing a class loader that allows ASM `ClassNode`s to be instantiated as runtime classes.

- - ### Field Summary

    - ### Fields inherited from interface org.apache.tapestry5.internal.plastic.asm.Opcodes

      `AALOAD, AASTORE, ACC_ABSTRACT, ACC_ANNOTATION, ACC_BRIDGE, ACC_DEPRECATED, ACC_ENUM, ACC_FINAL, ACC_INTERFACE, ACC_MANDATED, ACC_NATIVE, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC, ACC_STATIC, ACC_STRICT, ACC_SUPER, ACC_SYNCHRONIZED, ACC_SYNTHETIC, ACC_TRANSIENT, ACC_VARARGS, ACC_VOLATILE, ACONST_NULL, ALOAD, ANEWARRAY, ARETURN, ARRAYLENGTH, ASM4, ASM5, ASTORE, ATHROW, BALOAD, BASTORE, BIPUSH, CALOAD, CASTORE, CHECKCAST, D2F, D2I, D2L, DADD, DALOAD, DASTORE, DCMPG, DCMPL, DCONST_0, DCONST_1, DDIV, DLOAD, DMUL, DNEG, DOUBLE, DREM, DRETURN, DSTORE, DSUB, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, F_APPEND, F_CHOP, F_FULL, F_NEW, F_SAME, F_SAME1, F2D, F2I, F2L, FADD, FALOAD, FASTORE, FCMPG, FCMPL, FCONST_0, FCONST_1, FCONST_2, FDIV, FLOAD, FLOAT, FMUL, FNEG, FREM, FRETURN, FSTORE, FSUB, GETFIELD, GETSTATIC, GOTO, H_GETFIELD, H_GETSTATIC, H_INVOKEINTERFACE, H_INVOKESPECIAL, H_INVOKESTATIC, H_INVOKEVIRTUAL, H_NEWINVOKESPECIAL, H_PUTFIELD, H_PUTSTATIC, I2B, I2C, I2D, I2F, I2L, I2S, IADD, IALOAD, IAND, IASTORE, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, ICONST_M1, IDIV, IF_ACMPEQ, IF_ACMPNE, IF_ICMPEQ, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ICMPLT, IF_ICMPNE, IFEQ, IFGE, IFGT, IFLE, IFLT, IFNE, IFNONNULL, IFNULL, IINC, ILOAD, IMUL, INEG, INSTANCEOF, INTEGER, INVOKEDYNAMIC, INVOKEINTERFACE, INVOKESPECIAL, INVOKESTATIC, INVOKEVIRTUAL, IOR, IREM, IRETURN, ISHL, ISHR, ISTORE, ISUB, IUSHR, IXOR, JSR, L2D, L2F, L2I, LADD, LALOAD, LAND, LASTORE, LCMP, LCONST_0, LCONST_1, LDC, LDIV, LLOAD, LMUL, LNEG, LONG, LOOKUPSWITCH, LOR, LREM, LRETURN, LSHL, LSHR, LSTORE, LSUB, LUSHR, LXOR, MONITORENTER, MONITOREXIT, MULTIANEWARRAY, NEW, NEWARRAY, NOP, NULL, POP, POP2, PUTFIELD, PUTSTATIC, RET, RETURN, SALOAD, SASTORE, SIPUSH, SWAP, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, TABLESWITCH, TOP, UNINITIALIZED_THIS, V1_1, V1_2, V1_3, V1_4, V1_5, V1_6, V1_7, V1_8`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `PlasticClassPool(ClassLoader parentLoader, PlasticManagerDelegate delegate, Set<String> controlledPackages, Set<TransformationOption> options)` Creates the pool with a set of controlled packages; all classes in the controlled packages are loaded by the pool's class loader, and all top-level classes in the controlled packages are transformed via the delegate.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `addPlasticClassListener(PlasticClassListener listener)`
    `org.apache.tapestry5.internal.plastic.asm.tree.ClassNode` | `constructClassNodeFromBytecode(String className)` Constructs a class node by reading the raw bytecode for a class and instantiating a ClassNode (via `ClassReader.accept(org.apache.tapestry5.internal.plastic.asm.ClassVisitor, int)`).
    `protected Object` | `createAnnotation(String className, org.apache.tapestry5.internal.plastic.asm.tree.AnnotationNode node)`
    `AnnotationAccess` | `createAnnotationAccess(List<org.apache.tapestry5.internal.plastic.asm.tree.AnnotationNode> annotationNodes)`
    `AnnotationAccess` | `createAnnotationAccess(String className)`
    `PlasticClassTransformation` | `createTransformation(String baseClassName, String newClassName)`
    `PlasticClassTransformation` | `createTransformation(String baseClassName, String newClassName, String implementationClassName)`
    `ClassInstantiator` | `getClassInstantiator(String className)`
    `ClassLoader` | `getClassLoader()`
    `InternalPlasticClassTransformation` | `getPlasticClassTransformation(String className)` For a fully-qualified class name of an existing class, loads the bytes for the class and returns a PlasticClass instance.
    `Class<?>` | `loadAndTransformClass(String className)` Load the class, transforming it as necessary.
    `Class` | `realize(String primaryClassName, ClassType classType, org.apache.tapestry5.internal.plastic.asm.tree.ClassNode classNode)`
    `Class` | `realizeTransformedClass(org.apache.tapestry5.internal.plastic.asm.tree.ClassNode classNode, InheritanceData inheritanceData, StaticContext staticContext)`
    `void` | `removePlasticClassListener(PlasticClassListener listener)`
    `boolean` | `shouldInterceptClassLoading(String className)` Identifies which classes are to be loaded.

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### PlasticClassPool

          public PlasticClassPool(ClassLoader parentLoader,
                          PlasticManagerDelegate delegate,
                          Set<String> controlledPackages,
                          Set<TransformationOption> options)

      Creates the pool with a set of controlled packages; all classes in the controlled packages are loaded by the pool's class loader, and all top-level classes in the controlled packages are transformed via the delegate.
      Parameters:
        `parentLoader` - typically, the Thread's context class loader
        `delegate` - responsible for end stages of transforming top-level classes
        `controlledPackages` - set of package names (note: retained, not copied)
        `options` - used when transforming classes

  - ### Method Detail

    - #### getClassLoader

          public ClassLoader getClassLoader()

    - #### realizeTransformedClass

          public Class realizeTransformedClass(org.apache.tapestry5.internal.plastic.asm.tree.ClassNode classNode,
                                      InheritanceData inheritanceData,
                                      StaticContext staticContext)

    - #### realize

          public Class realize(String primaryClassName,
                      ClassType classType,
                      org.apache.tapestry5.internal.plastic.asm.tree.ClassNode classNode)

    - #### createAnnotationAccess

          public AnnotationAccess createAnnotationAccess(String className)

    - #### createAnnotationAccess

          public AnnotationAccess createAnnotationAccess(List<org.apache.tapestry5.internal.plastic.asm.tree.AnnotationNode> annotationNodes)

    - #### createAnnotation

          protected Object createAnnotation(String className,
                                org.apache.tapestry5.internal.plastic.asm.tree.AnnotationNode node)

    - #### shouldInterceptClassLoading

          public boolean shouldInterceptClassLoading(String className)

      Description copied from interface: `ClassLoaderDelegate`
      Identifies which classes are to be loaded.
      Specified by:
        `shouldInterceptClassLoading` in interface `ClassLoaderDelegate`
      Parameters:
        `className` - fully qualified class name
      Returns:
        true if the class should be intercepted, false to let parent class loader load class

    - #### loadAndTransformClass

          public Class<?> loadAndTransformClass(String className)
                                         throws ClassNotFoundException

      Description copied from interface: `ClassLoaderDelegate`
      Load the class, transforming it as necessary.
      Specified by:
        `loadAndTransformClass` in interface `ClassLoaderDelegate`
      Parameters:
        `className` - binary class name
      Returns:
        loaded and (if not an inner class) transformed class
      Throws:
        `ClassNotFoundException`

    - #### getPlasticClassTransformation

          public InternalPlasticClassTransformation getPlasticClassTransformation(String className)
                                                                           throws ClassNotFoundException

      For a fully-qualified class name of an existing class, loads the bytes for the class and returns a PlasticClass instance.
      Throws:
        `ClassNotFoundException`

    - #### constructClassNodeFromBytecode

          public org.apache.tapestry5.internal.plastic.asm.tree.ClassNode constructClassNodeFromBytecode(String className)

      Constructs a class node by reading the raw bytecode for a class and instantiating a ClassNode (via `ClassReader.accept(org.apache.tapestry5.internal.plastic.asm.ClassVisitor, int)`).
      Parameters:
        `className` - fully qualified class name
      Returns:
        corresponding ClassNode

    - #### createTransformation

          public PlasticClassTransformation createTransformation(String baseClassName,
                                                        String newClassName)

    - #### createTransformation

          public PlasticClassTransformation createTransformation(String baseClassName,
                                                        String newClassName,
                                                        String implementationClassName)

    - #### getClassInstantiator

          public ClassInstantiator getClassInstantiator(String className)

    - #### addPlasticClassListener

          public void addPlasticClassListener(PlasticClassListener listener)

      Specified by:
        `addPlasticClassListener` in interface `PlasticClassListenerHub`

    - #### removePlasticClassListener

          public void removePlasticClassListener(PlasticClassListener listener)

      Specified by:
        `removePlasticClassListener` in interface `PlasticClassListenerHub`

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