Class OpMinus
- java.lang.Object
- org.springframework.expression.spel.ast.SpelNodeImpl
- org.springframework.expression.spel.ast.Operator
- org.springframework.expression.spel.ast.OpMinus
public class OpMinus extends Operator
The minus operator supports:- subtraction of numbers
- subtraction of an int from a string of one character (effectively decreasing that character), so 'd'-3='a'
It can be used as a unary operator for numbers. The standard promotions are performed when the operand types vary (double-int=double). For other options it defers to the registered overloader.
- Since:
- 3.0
- Author:
- Andy Clement, Juergen Hoeller, Giovanni Dall'Oglio Risso
Nested Class Summary
Nested classes/interfaces inherited from class org.springframework.expression.spel.ast.Operator
Operator.DescriptorComparison
Field Summary
Fields inherited from class org.springframework.expression.spel.ast.Operator
leftActualDescriptor, 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 OpMinus(int pos, SpelNodeImpl... operands)
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidgenerateCode(MethodVisitor mv, CodeFlow cf)Generate the bytecode for this node into the supplied visitor.SpelNodeImplgetRightOperand()TypedValuegetValueInternal(ExpressionState state)booleanisCompilable()Check whether a node can be compiled to bytecode.StringtoStringAST()String format for all operators is the same'(' [operand] [operator] [operand] ')'.Methods inherited from class org.springframework.expression.spel.ast.Operator
equalityCheck, generateComparisonCode, getLeftOperand, getOperatorName, isCompilableOperatorUsingNumerics
Methods inherited from class org.springframework.expression.spel.ast.SpelNodeImpl
generateCodeForArgument, generateCodeForArguments, getChild, getChildCount, getEndPosition, getExitDescriptor, getObjectClass, getPreviousChild, getStartPosition, getTypedValue, getValue, getValue, getValueRef, isWritable, nextChildIs, setValue
Constructor Detail
OpMinus
public OpMinus(int pos, SpelNodeImpl... operands)
Method Detail
getValueInternal
public TypedValue getValueInternal(ExpressionState state) throws EvaluationException
- Specified by:
getValueInternalin classSpelNodeImpl- Throws:
EvaluationException
toStringAST
public String toStringAST()
Description copied from class:OperatorString format for all operators is the same'(' [operand] [operator] [operand] ')'.- Specified by:
toStringASTin interfaceSpelNode- Overrides:
toStringASTin classOperator- Returns:
- the string form of this AST node
getRightOperand
public SpelNodeImpl getRightOperand()
- Overrides:
getRightOperandin classOperator
isCompilable
public boolean isCompilable()
Description copied from class:SpelNodeImplCheck whether a node can be compiled to bytecode. The reasoning in each node may be different but will typically involve checking whether the exit type descriptor of the node is known and any relevant child nodes are compilable.- Overrides:
isCompilablein classSpelNodeImpl- Returns:
trueif this node can be compiled to bytecode
generateCode
public void generateCode(MethodVisitor mv, CodeFlow cf)
Description copied from class:SpelNodeImplGenerate the bytecode for this node into the supplied visitor. Context info about the current expression being compiled is available in the codeflow object. For example it will include information about the type of the object currently on the stack.- Overrides:
generateCodein classSpelNodeImpl- Parameters:
mv- the ASM MethodVisitor into which code should be generatedcf- a context object with info about what is on the stack