类 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.
- 从以下版本开始:
- 3.0
- 作者:
- Andy Clement, Juergen Hoeller, Giovanni Dall'Oglio Risso
嵌套类概要
从类继承的嵌套类/接口 org.springframework.expression.spel.ast.Operator
Operator.DescriptorComparison
字段概要
从类继承的字段 org.springframework.expression.spel.ast.Operator
leftActualDescriptor, rightActualDescriptor
从类继承的字段 org.springframework.expression.spel.ast.SpelNodeImpl
children, exitTypeDescriptor, pos
从接口继承的字段 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
构造器概要
构造器 构造器 说明 OpMinus(int pos, SpelNodeImpl... operands)
方法概要
所有方法 实例方法 具体方法 修饰符和类型 方法 说明 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] ')'.从类继承的方法 org.springframework.expression.spel.ast.Operator
equalityCheck, generateComparisonCode, getLeftOperand, getOperatorName, isCompilableOperatorUsingNumerics
从类继承的方法 org.springframework.expression.spel.ast.SpelNodeImpl
generateCodeForArgument, generateCodeForArguments, getChild, getChildCount, getEndPosition, getExitDescriptor, getObjectClass, getPreviousChild, getStartPosition, getTypedValue, getValue, getValue, getValueRef, isWritable, nextChildIs, setValue
构造器详细资料
OpMinus
public OpMinus(int pos, SpelNodeImpl... operands)
方法详细资料
getValueInternal
public TypedValue getValueInternal(ExpressionState state) throws EvaluationException
- 指定者:
getValueInternal在类中SpelNodeImpl- 抛出:
EvaluationException
toStringAST
public String toStringAST()
从类复制的说明:OperatorString format for all operators is the same'(' [operand] [operator] [operand] ')'.- 指定者:
toStringAST在接口中SpelNode- 覆盖:
toStringAST在类中Operator- 返回:
- the string form of this AST node
getRightOperand
public SpelNodeImpl getRightOperand()
- 覆盖:
getRightOperand在类中Operator
isCompilable
public boolean isCompilable()
从类复制的说明: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.- 覆盖:
isCompilable在类中SpelNodeImpl- 返回:
trueif this node can be compiled to bytecode
generateCode
public void generateCode(MethodVisitor mv, CodeFlow cf)
从类复制的说明: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.- 覆盖:
generateCode在类中SpelNodeImpl- 参数:
mv- the ASM MethodVisitor into which code should be generatedcf- a context object with info about what is on the stack