com.github.mustachejava.indy

Class IndyWrapper

java.lang.Object

com.github.mustachejava.reflect.GuardedWrapper

com.github.mustachejava.reflect.ReflectionWrapper

com.github.mustachejava.codegen.CodegenReflectionWrapper

com.github.mustachejava.indy.IndyWrapper

All Implemented Interfaces:

Wrapper, org.objectweb.asm.Opcodes

public abstract class IndyWrapper
extends CodegenReflectionWrapper
implements org.objectweb.asm.Opcodes

Creates wrappers using ASM and Invokedynamic.

Field Summary

Fields

Modifier and Type	Field and Description
static org.objectweb.asm.Handle	BOOTSTRAP_METHOD

Fields inherited from class com.github.mustachejava.reflect.ReflectionWrapper

arguments, field, method, oh, scopeIndex, wrappers

Fields inherited from class com.github.mustachejava.reflect.GuardedWrapper

guardException, guards

Fields inherited from interface org.objectweb.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

Modifier	Constructor and Description
protected	IndyWrapper(ReflectionWrapper rw)

Method Summary

Modifier and Type	Method and Description
static CallSite	bootstrap(MethodHandles.Lookup caller, String name, MethodType type) This bootstrap method simply points to the lookup method so we can see what is on the stack at runtime since we need the parameters in order to make a decision.
abstract Object	call(Object[] scopes)
static IndyWrapper	create(CodegenReflectionWrapper rw)
static IndyWrapper	create(CodegenReflectionWrapper rw, boolean guard) We replace a codegenerated reflection based wrapper with one that uses invoke dynamic.
static Class<?>	defineClass(String name, byte[] b)
static String	encodeClassName(String pkgName, String name)
static Object	lookup(MutableCallSite callSite, IndyWrapper iw, Object scope) This bootstrap method does the actual work of tracking down the CallSite at runtime.

Methods inherited from class com.github.mustachejava.codegen.CodegenReflectionWrapper

guardCall

Methods inherited from class com.github.mustachejava.reflect.ReflectionWrapper

call, getArguments, getField, getMethod, getWrappers, toString, unwrap

Methods inherited from class com.github.mustachejava.reflect.GuardedWrapper

equals, getGuards, hashCode

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

BOOTSTRAP_METHOD

public static final org.objectweb.asm.Handle BOOTSTRAP_METHOD

Constructor Detail

IndyWrapper

protected IndyWrapper(ReflectionWrapper rw)

Method Detail

bootstrap

public static CallSite bootstrap(MethodHandles.Lookup caller,
                                 String name,
                                 MethodType type)
                          throws NoSuchMethodException,
                                 IllegalAccessException

This bootstrap method simply points to the lookup method so we can see what is on the stack at runtime since we need the parameters in order to make a decision.

Parameters:

caller - the factory for creating method handles

name - the name of the method to call

type - the type of the method

Returns:

the callsite to use, initially the lookup site that then finds the real site

Throws:

NoSuchMethodException

IllegalAccessException

call

public abstract Object call(Object[] scopes)
                     throws GuardException

Throws:

GuardException

create

public static IndyWrapper create(CodegenReflectionWrapper rw)

create

public static IndyWrapper create(CodegenReflectionWrapper rw,
                                 boolean guard)

We replace a codegenerated reflection based wrapper with one that uses invoke dynamic.

Parameters:

rw - the original code generated wrapper

guard - whether to guard the wrapper

Returns:

a invokedyanmic based wrapper

encodeClassName

public static String encodeClassName(String pkgName,
                                     String name)

defineClass

public static Class<?> defineClass(String name,
                                   byte[] b)

lookup

public static Object lookup(MutableCallSite callSite,
                            IndyWrapper iw,
                            Object scope)
                     throws IllegalAccessException,
                            InvocationTargetException

This bootstrap method does the actual work of tracking down the CallSite at runtime.

Parameters:

callSite - the callsite that called lookup, this is redirected to the actual field or method

iw - the wrapper around the real call site

scope - the current object scope

Returns:

the result of executing the method against the scope

Throws:

IllegalAccessException

InvocationTargetException