public class BytecodeHelper extends Object
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| Type | Name and description |
|---|---|
static boolean |
box(org.objectweb.asm.MethodVisitor mv, ClassNode type)box top level operand |
static boolean |
box(org.objectweb.asm.MethodVisitor mv, Class type)Generates the bytecode to autobox the current value on the stack |
static void |
doCast(org.objectweb.asm.MethodVisitor mv, ClassNode type) |
static void |
doCast(org.objectweb.asm.MethodVisitor mv, Class type) |
static void |
doCastToPrimitive(org.objectweb.asm.MethodVisitor mv, ClassNode sourceType, ClassNode targetType)Given a wrapped number type (Byte, Integer, Short, ...), generates bytecode to convert it to a primitive number (int, long, double) using calls to wrapped. |
static void |
doCastToWrappedType(org.objectweb.asm.MethodVisitor mv, ClassNode sourceType, ClassNode targetType)Given a primitive number type (byte, integer, short, ...), generates bytecode to convert it to a wrapped number (Integer, Long, Double) using calls to [WrappedType].valueOf |
static void |
doReturn(org.objectweb.asm.MethodVisitor mv, ClassNode returnType) |
static String |
formatNameForClassLoading(String name)load a message on the stack and remove it right away. |
static String |
getClassInternalName(ClassNode t) |
static String |
getClassInternalName(Class t) |
static String |
getClassInternalName(String name)@return the ASM internal name of the type |
static String[] |
getClassInternalNames(ClassNode[] names)@return an array of ASM internal names of the type |
static String |
getClassLoadingTypeDescription(ClassNode c)array types are special: eg.: String[]: classname: [Ljava.lang.String; Object: classname: java.lang.Object int[] : classname: [I unlike getTypeDescription '.' is not replaced by '/'. |
static String |
getGenericsBounds(ClassNode type) |
static String |
getGenericsMethodSignature(MethodNode node) |
static String |
getGenericsSignature(ClassNode node) |
static String |
getMethodDescriptor(ClassNode returnType, Parameter[] parameters) |
static String |
getMethodDescriptor(MethodNode methodNode)Returns a method descriptor for the given MethodNode. |
static String |
getMethodDescriptor(Class returnType, Class[] paramTypes)@return the ASM method type descriptor |
static String |
getTypeDescription(Class c) |
static String |
getTypeDescription(ClassNode c)array types are special: eg.: String[]: classname: [Ljava/lang/String; int[]: [I |
static int |
hashCode(String str)Computes a hash code for a string. |
static boolean |
isClassLiteralPossible(ClassNode classNode)Tells if a class node is candidate for class literal bytecode optimization. |
static boolean |
isSameCompilationUnit(ClassNode a, ClassNode b)Returns true if the two classes share the same compilation unit. |
static void |
load(org.objectweb.asm.MethodVisitor mv, ClassNode type, int idx) |
static void |
negateBoolean(org.objectweb.asm.MethodVisitor mv)negate a boolean on stack. true->false, false->true |
static void |
pushConstant(org.objectweb.asm.MethodVisitor mv, int value) |
static void |
unbox(org.objectweb.asm.MethodVisitor mv, Class type)Generates the bytecode to unbox the current value on the stack |
static void |
unbox(org.objectweb.asm.MethodVisitor mv, ClassNode type) |
static void |
visitClassLiteral(org.objectweb.asm.MethodVisitor mv, ClassNode classNode)Visits a class literal. |
box top level operand
Generates the bytecode to autobox the current value on the stack
Given a wrapped number type (Byte, Integer, Short, ...), generates bytecode to convert it to a primitive number (int, long, double) using calls to wrapped.[targetType]Value()
mv - method visitorsourceType - the wrapped number typetargetType - the primitive target typeGiven a primitive number type (byte, integer, short, ...), generates bytecode to convert it to a wrapped number (Integer, Long, Double) using calls to [WrappedType].valueOf
mv - method visitorsourceType - the primitive number typetargetType - the wrapped target typeload a message on the stack and remove it right away. Good for put a mark in the generated bytecode for debugging purpose.
array types are special: eg.: String[]: classname: [Ljava.lang.String; Object: classname: java.lang.Object int[] : classname: [I unlike getTypeDescription '.' is not replaced by '/'. it seems that makes problems for the class loading if '.' is replaced by '/'
Returns a method descriptor for the given MethodNode.
methodNode - the method node for which to create the descriptor
array types are special: eg.: String[]: classname: [Ljava/lang/String; int[]: [I
Computes a hash code for a string. The purpose of this hashcode is to be constant independently of the JDK being used.
str - the string for which to compute the hashcodeTells if a class node is candidate for class literal bytecode optimization. If so, bytecode may use LDC instructions instead of static constant Class fields to retrieve class literals.
classNode - the classnode for which we want to know if bytecode optimization is possibleReturns true if the two classes share the same compilation unit.
a - class ab - class bnegate a boolean on stack. true->false, false->true
Generates the bytecode to unbox the current value on the stack
Visits a class literal. If the type of the classnode is a primitive type, the generated bytecode will be a GETSTATIC Integer.TYPE. If the classnode is not a primitive type, we will generate a LDC instruction.