org.mvel2.asm.tree.analysis
Class SourceInterpreter

java.lang.Object
  org.mvel2.asm.tree.analysis.Interpreter<SourceValue>
      org.mvel2.asm.tree.analysis.SourceInterpreter

All Implemented Interfaces:

Opcodes

public class SourceInterpreter
extends Interpreter<SourceValue>
implements Opcodes

An Interpreter for SourceValue values.

Author:

Eric Bruneton

Field Summary

Fields inherited from class org.mvel2.asm.tree.analysis.Interpreter

api

Fields inherited from interface org.mvel2.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

	SourceInterpreter()
protected	SourceInterpreter(int api)

Method Summary

SourceValue	binaryOperation(AbstractInsnNode insn, SourceValue value1, SourceValue value2) Interprets a bytecode instruction with two arguments.
SourceValue	copyOperation(AbstractInsnNode insn, SourceValue value) Interprets a bytecode instruction that moves a value on the stack or to or from local variables.
SourceValue	merge(SourceValue d, SourceValue w) Merges two values.
SourceValue	naryOperation(AbstractInsnNode insn, List<? extends SourceValue> values) Interprets a bytecode instruction with a variable number of arguments.
SourceValue	newOperation(AbstractInsnNode insn) Interprets a bytecode instruction without arguments.
SourceValue	newValue(Type type) Creates a new value that represents the given type.
void	returnOperation(AbstractInsnNode insn, SourceValue value, SourceValue expected) Interprets a bytecode return instruction.
SourceValue	ternaryOperation(AbstractInsnNode insn, SourceValue value1, SourceValue value2, SourceValue value3) Interprets a bytecode instruction with three arguments.
SourceValue	unaryOperation(AbstractInsnNode insn, SourceValue value) Interprets a bytecode instruction with a single argument.

Methods inherited from class java.lang.Object

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

Constructor Detail

SourceInterpreter

public SourceInterpreter()

SourceInterpreter

protected SourceInterpreter(int api)

Method Detail

newValue

public SourceValue newValue(Type type)

Description copied from class: Interpreter

Creates a new value that represents the given type. Called for method parameters (including this), exception handler variable and with null type for variables reserved by long and double types.

Specified by:

newValue in class Interpreter<SourceValue>

Parameters:

type - a primitive or reference type, or null to represent an uninitialized value.

Returns:

a value that represents the given type. The size of the returned value must be equal to the size of the given type.

newOperation

public SourceValue newOperation(AbstractInsnNode insn)

Description copied from class: Interpreter

Interprets a bytecode instruction without arguments. This method is called for the following opcodes: ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, LCONST_0, LCONST_1, FCONST_0, FCONST_1, FCONST_2, DCONST_0, DCONST_1, BIPUSH, SIPUSH, LDC, JSR, GETSTATIC, NEW

Specified by:

newOperation in class Interpreter<SourceValue>

Parameters:

insn - the bytecode instruction to be interpreted.

Returns:

the result of the interpretation of the given instruction.

copyOperation

public SourceValue copyOperation(AbstractInsnNode insn,
                                 SourceValue value)

Description copied from class: Interpreter

Interprets a bytecode instruction that moves a value on the stack or to or from local variables. This method is called for the following opcodes: ILOAD, LLOAD, FLOAD, DLOAD, ALOAD, ISTORE, LSTORE, FSTORE, DSTORE, ASTORE, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, SWAP

Specified by:

copyOperation in class Interpreter<SourceValue>

Parameters:

insn - the bytecode instruction to be interpreted.

value - the value that must be moved by the instruction.

Returns:

the result of the interpretation of the given instruction. The returned value must be equal to the given value.

unaryOperation

public SourceValue unaryOperation(AbstractInsnNode insn,
                                  SourceValue value)

Description copied from class: Interpreter

Interprets a bytecode instruction with a single argument. This method is called for the following opcodes: INEG, LNEG, FNEG, DNEG, IINC, I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L, F2D, D2I, D2L, D2F, I2B, I2C, I2S, IFEQ, IFNE, IFLT, IFGE, IFGT, IFLE, TABLESWITCH, LOOKUPSWITCH, IRETURN, LRETURN, FRETURN, DRETURN, ARETURN, PUTSTATIC, GETFIELD, NEWARRAY, ANEWARRAY, ARRAYLENGTH, ATHROW, CHECKCAST, INSTANCEOF, MONITORENTER, MONITOREXIT, IFNULL, IFNONNULL

Specified by:

unaryOperation in class Interpreter<SourceValue>

Parameters:

insn - the bytecode instruction to be interpreted.

value - the argument of the instruction to be interpreted.

Returns:

the result of the interpretation of the given instruction.

binaryOperation

public SourceValue binaryOperation(AbstractInsnNode insn,
                                   SourceValue value1,
                                   SourceValue value2)

Description copied from class: Interpreter

Interprets a bytecode instruction with two arguments. This method is called for the following opcodes: IALOAD, LALOAD, FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD, IADD, LADD, FADD, DADD, ISUB, LSUB, FSUB, DSUB, IMUL, LMUL, FMUL, DMUL, IDIV, LDIV, FDIV, DDIV, IREM, LREM, FREM, DREM, ISHL, LSHL, ISHR, LSHR, IUSHR, LUSHR, IAND, LAND, IOR, LOR, IXOR, LXOR, LCMP, FCMPL, FCMPG, DCMPL, DCMPG, IF_ICMPEQ, IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ACMPEQ, IF_ACMPNE, PUTFIELD

Specified by:

binaryOperation in class Interpreter<SourceValue>

Parameters:

insn - the bytecode instruction to be interpreted.

value1 - the first argument of the instruction to be interpreted.

value2 - the second argument of the instruction to be interpreted.

Returns:

the result of the interpretation of the given instruction.

ternaryOperation

public SourceValue ternaryOperation(AbstractInsnNode insn,
                                    SourceValue value1,
                                    SourceValue value2,
                                    SourceValue value3)

Description copied from class: Interpreter

Interprets a bytecode instruction with three arguments. This method is called for the following opcodes: IASTORE, LASTORE, FASTORE, DASTORE, AASTORE, BASTORE, CASTORE, SASTORE

Specified by:

ternaryOperation in class Interpreter<SourceValue>

Parameters:

insn - the bytecode instruction to be interpreted.

value1 - the first argument of the instruction to be interpreted.

value2 - the second argument of the instruction to be interpreted.

value3 - the third argument of the instruction to be interpreted.

Returns:

the result of the interpretation of the given instruction.

naryOperation

public SourceValue naryOperation(AbstractInsnNode insn,
                                 List<? extends SourceValue> values)

Description copied from class: Interpreter

Interprets a bytecode instruction with a variable number of arguments. This method is called for the following opcodes: INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC, INVOKEINTERFACE, MULTIANEWARRAY and INVOKEDYNAMIC

Specified by:

naryOperation in class Interpreter<SourceValue>

Parameters:

insn - the bytecode instruction to be interpreted.

values - the arguments of the instruction to be interpreted.

Returns:

the result of the interpretation of the given instruction.

returnOperation

public void returnOperation(AbstractInsnNode insn,
                            SourceValue value,
                            SourceValue expected)

Description copied from class: Interpreter

Interprets a bytecode return instruction. This method is called for the following opcodes: IRETURN, LRETURN, FRETURN, DRETURN, ARETURN

Specified by:

returnOperation in class Interpreter<SourceValue>

Parameters:

insn - the bytecode instruction to be interpreted.

value - the argument of the instruction to be interpreted.

expected - the expected return type of the analyzed method.

merge

public SourceValue merge(SourceValue d,
                         SourceValue w)

Description copied from class: Interpreter

Merges two values. The merge operation must return a value that represents both values (for instance, if the two values are two types, the merged value must be a common super type of the two types. If the two values are integer intervals, the merged value must be an interval that contains the previous ones. Likewise for other types of values).

Specified by:

merge in class Interpreter<SourceValue>

Parameters:

d - a value.

w - another value.

Returns:

the merged value. If the merged value is equal to v, this method must return v.