Class Operator
- java.lang.Object
- org.springframework.expression.spel.ast.SpelNodeImpl
- org.springframework.expression.spel.ast.Operator
- Direct Known Subclasses:
OpAnd
,OpDec
,OpDivide
,OpEQ
,OperatorBetween
,OperatorInstanceof
,OperatorMatches
,OperatorPower
,OpGE
,OpGT
,OpInc
,OpLE
,OpLT
,OpMinus
,OpModulus
,OpMultiply
,OpNE
,OpOr
,OpPlus
public abstract class Operator extends SpelNodeImpl
Common supertype for operators that operate on either one or two operands. In the case of multiply or divide there would be two operands, but for unary plus or minus, there is only one.- Since:
- 3.0
- Author:
- Andy Clement, Juergen Hoeller, Giovanni Dall'Oglio Risso
Nested Class Summary
Nested Classes Modifier and Type Class Description protected static class
Operator.DescriptorComparison
A descriptor comparison encapsulates the result of comparing descriptor for two operands and describes at what level they are compatible.
Field Summary
Fields Modifier and Type Field Description protected String
leftActualDescriptor
protected String
rightActualDescriptor
Fields inherited from class org.springframework.expression.spel.ast.SpelNodeImpl
children, exitTypeDescriptor, pos
Fields inherited from interface org.springframework.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_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, ASM4, ASM5, ASM6, 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, V1_9
Constructor Summary
Constructors Constructor Description Operator(String payload, int pos, SpelNodeImpl... operands)
Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static boolean
equalityCheck(EvaluationContext context, Object left, Object right)
Perform an equality check for the given operand values.protected void
generateComparisonCode(MethodVisitor mv, CodeFlow cf, int compInstruction1, int compInstruction2)
Numeric comparison operators share very similar generated code, only differing in two comparison instructions.SpelNodeImpl
getLeftOperand()
String
getOperatorName()
SpelNodeImpl
getRightOperand()
protected boolean
isCompilableOperatorUsingNumerics()
String
toStringAST()
String format for all operators is the same'(' [operand] [operator] [operand] ')'
.Methods inherited from class org.springframework.expression.spel.ast.SpelNodeImpl
generateCode, generateCodeForArgument, generateCodeForArguments, getChild, getChildCount, getEndPosition, getExitDescriptor, getObjectClass, getPreviousChild, getStartPosition, getTypedValue, getValue, getValue, getValueInternal, getValueRef, isCompilable, isWritable, nextChildIs, setValue
Field Detail
leftActualDescriptor
protected String leftActualDescriptor
rightActualDescriptor
protected String rightActualDescriptor
Constructor Detail
Operator
public Operator(String payload, int pos, SpelNodeImpl... operands)
Method Detail
getLeftOperand
public SpelNodeImpl getLeftOperand()
getRightOperand
public SpelNodeImpl getRightOperand()
getOperatorName
public final String getOperatorName()
toStringAST
public String toStringAST()
String format for all operators is the same'(' [operand] [operator] [operand] ')'
.- Returns:
- the string form of this AST node
isCompilableOperatorUsingNumerics
protected boolean isCompilableOperatorUsingNumerics()
generateComparisonCode
protected void generateComparisonCode(MethodVisitor mv, CodeFlow cf, int compInstruction1, int compInstruction2)
Numeric comparison operators share very similar generated code, only differing in two comparison instructions.
equalityCheck
public static boolean equalityCheck(EvaluationContext context, Object left, Object right)
Perform an equality check for the given operand values.This method is not just used for reflective comparisons in subclasses but also from compiled expression code, which is why it needs to be declared as
public static
here.- Parameters:
context
- the current evaluation contextleft
- the left-hand operand valueright
- the right-hand operand value