Package org.codehaus.groovy.classgen.asm
Class BytecodeHelper
java.lang.Object
org.codehaus.groovy.classgen.asm.BytecodeHelper
- All Implemented Interfaces:
org.objectweb.asm.Opcodes
public class BytecodeHelper extends Object implements org.objectweb.asm.Opcodes
A helper class for bytecode generation with AsmClassGenerator.
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Field Summary
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_MODULE, ACC_NATIVE, ACC_OPEN, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC, ACC_RECORD, ACC_STATIC, ACC_STATIC_PHASE, ACC_STRICT, ACC_SUPER, ACC_SYNCHRONIZED, ACC_SYNTHETIC, ACC_TRANSIENT, ACC_TRANSITIVE, ACC_VARARGS, ACC_VOLATILE, ACONST_NULL, ALOAD, ANEWARRAY, ARETURN, ARRAYLENGTH, ASM10_EXPERIMENTAL, ASM4, ASM5, ASM6, ASM7, ASM8, ASM9, 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, SOURCE_DEPRECATED, SOURCE_MASK, SWAP, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, TABLESWITCH, TOP, UNINITIALIZED_THIS, V_PREVIEW, V1_1, V1_2, V1_3, V1_4, V1_5, V1_6, V1_7, V1_8, V10, V11, V12, V13, V14, V15, V16, V17, V18, V19, V9 -
Constructor Summary
Constructors Constructor Description BytecodeHelper() -
Method Summary
Modifier and Type Method Description static booleanbox(org.objectweb.asm.MethodVisitor mv, Class type)Deprecated.static booleanbox(org.objectweb.asm.MethodVisitor mv, ClassNode type)Deprecated.static voidconvertPrimitiveToBoolean(org.objectweb.asm.MethodVisitor mv, ClassNode type)Converts a primitive type to boolean.static voiddoCast(org.objectweb.asm.MethodVisitor mv, Class type)static voiddoCast(org.objectweb.asm.MethodVisitor mv, ClassNode type)static voiddoCastToPrimitive(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.[targetType]Value()static voiddoCastToWrappedType(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].valueOfstatic voiddoReturn(org.objectweb.asm.MethodVisitor mv, ClassNode type)static StringformatNameForClassLoading(String name)returns a name that Class.forName() can take.static StringgetClassInternalName(Class t)static StringgetClassInternalName(String name)static StringgetClassInternalName(ClassNode t)static String[]getClassInternalNames(ClassNode[] names)static StringgetClassLoadingTypeDescription(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 StringgetGenericsBounds(ClassNode type)static StringgetGenericsMethodSignature(MethodNode node)static StringgetGenericsSignature(ClassNode node)static StringgetMethodDescriptor(Class returnType, Class[] paramTypes)static StringgetMethodDescriptor(ClassNode returnType, ClassNode[] parameterTypes)static StringgetMethodDescriptor(ClassNode returnType, Parameter[] parameters)static StringgetMethodDescriptor(MethodNode methodNode)Returns a method descriptor for the givenMethodNode.static StringgetTypeDescription(Class c)static StringgetTypeDescription(ClassNode c)array types are special: eg.: String[]: classname: [Ljava/lang/String; int[]: [Istatic inthashCode(String str)Computes a hash code for a string.static booleanisClassLiteralPossible(ClassNode classNode)Tells if a class node is candidate for class literal bytecode optimization.static booleanisSameCompilationUnit(ClassNode a, ClassNode b)Returns true if the two classes share the same compilation unit.static voidload(org.objectweb.asm.MethodVisitor mv, ClassNode type, int idx)static voidnegateBoolean(org.objectweb.asm.MethodVisitor mv)Negate a boolean on stack.static voidpushConstant(org.objectweb.asm.MethodVisitor mv, int value)static voidstore(org.objectweb.asm.MethodVisitor mv, ClassNode type, int idx)static voidunbox(org.objectweb.asm.MethodVisitor mv, Class type)Generates the bytecode to unbox the current value on the stack.static voidunbox(org.objectweb.asm.MethodVisitor mv, ClassNode type)Generates the bytecode to unbox the current value on the stack.static voidvisitClassLiteral(org.objectweb.asm.MethodVisitor mv, ClassNode classNode)Visits a class literal.
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Constructor Details
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BytecodeHelper
public BytecodeHelper()
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Method Details
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getClassInternalName
- Returns:
- the ASM internal name of the type
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getClassInternalName
- Returns:
- the ASM internal name of the type
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getClassInternalName
- Returns:
- the ASM internal name of the type
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getMethodDescriptor
Returns a method descriptor for the givenMethodNode.- Parameters:
methodNode- the method node for which to create the descriptor- Returns:
- a method descriptor as defined in section JVMS section 4.3.3
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getMethodDescriptor
- Returns:
- the ASM method type descriptor
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getMethodDescriptor
- Returns:
- the ASM method type descriptor
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getMethodDescriptor
- Returns:
- the ASM method type descriptor
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getClassLoadingTypeDescription
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:
- the ASM type description for class loading
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getTypeDescription
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getTypeDescription
array types are special: eg.: String[]: classname: [Ljava/lang/String; int[]: [I- Returns:
- the ASM type description
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getClassInternalNames
- Returns:
- an array of ASM internal names of the type
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pushConstant
public static void pushConstant(org.objectweb.asm.MethodVisitor mv, int value) -
negateBoolean
public static void negateBoolean(org.objectweb.asm.MethodVisitor mv)Negate a boolean on stack. -
formatNameForClassLoading
returns a name that Class.forName() can take. Notably for arrays: [I, [Ljava.lang.String; etc Regular object type: java.lang.String -
getGenericsMethodSignature
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getGenericsSignature
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getGenericsBounds
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doCast
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doCastToPrimitive
public 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.[targetType]Value()- Parameters:
mv- method visitorsourceType- the wrapped number typetargetType- the primitive target type
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doCastToWrappedType
public 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- Parameters:
mv- method visitorsourceType- the primitive number typetargetType- the wrapped target type
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doCast
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box
Deprecated.Generates the bytecode to autobox the current value on the stack. -
box
Deprecated.Generates the bytecode to autobox the current value on the stack. -
unbox
Generates the bytecode to unbox the current value on the stack. -
unbox
Generates the bytecode to unbox the current value on the stack. -
visitClassLiteral
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. -
isClassLiteralPossible
Tells 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.- Parameters:
classNode- the classnode for which we want to know if bytecode optimization is possible- Returns:
- true if the bytecode can be optimized
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isSameCompilationUnit
Returns true if the two classes share the same compilation unit.- Parameters:
a- class ab- class b- Returns:
- true if both classes share the same compilation unit
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hashCode
Computes a hash code for a string. The purpose of this hashcode is to be constant independently of the JDK being used.- Parameters:
str- the string for which to compute the hashcode- Returns:
- hashcode of the string
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convertPrimitiveToBoolean
Converts a primitive type to boolean.- Parameters:
mv- method visitortype- primitive type to convert
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doReturn
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load
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store
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