程序包 cn.taketoday.expression.spel.ast

类 Operator

java.lang.Object

cn.taketoday.expression.spel.ast.SpelNodeImpl

cn.taketoday.expression.spel.ast.Operator

所有已实现的接口:

Opcodes, SpelNode

直接已知子类:

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.

从以下版本开始:

4.0

作者:

Andy Clement, Juergen Hoeller, Giovanni Dall'Oglio Risso, Sam Brannen

嵌套类概要

嵌套类

修饰符和类型	类	说明
protected static final class	Operator.DescriptorComparison	A descriptor comparison encapsulates the result of comparing descriptor for two operands and describes at what level they are compatible.

字段概要

字段

修饰符和类型	字段	说明
protected String	leftActualDescriptor
private final String	operatorName
protected String	rightActualDescriptor

从类继承的字段 cn.taketoday.expression.spel.ast.SpelNodeImpl

children, exitTypeDescriptor

从接口继承的字段 cn.taketoday.bytecode.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, 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, JAVA_VERSION, 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, PRIVATE_FINAL_STATIC, PUTFIELD, PUTSTATIC, RET, RETURN, SALOAD, SASTORE, SIPUSH, SOURCE_DEPRECATED, SOURCE_MASK, SWAP, SWITCH_STYLE_HASH, SWITCH_STYLE_HASHONLY, SWITCH_STYLE_TRIE, 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, V20, V21, V9

构造器概要

构造器

构造器	说明
Operator(String payload, int startPos, int endPos, SpelNodeImpl... operands)

方法概要

修饰符和类型	方法	说明
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()
final String	getOperatorName()
SpelNodeImpl	getRightOperand()
protected boolean	isCompilableOperatorUsingNumerics()
String	toStringAST()	String format for all operators is the same '(' [operand] [operator] [operand] ')'.

从类继承的方法 cn.taketoday.expression.spel.ast.SpelNodeImpl

generateCode, generateCodeForArgument, generateCodeForArguments, getChild, getChildCount, getEndPosition, getExitDescriptor, getObjectClass, getStartPosition, getTypedValue, getValue, getValue, getValueInternal, getValueRef, isCompilable, isWritable, nextChildIs, setValue, setValueInternal

从类继承的方法 java.lang.Object

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

字段详细资料

operatorName

private final String operatorName

leftActualDescriptor

@Nullable
protected String leftActualDescriptor

rightActualDescriptor

@Nullable
protected String rightActualDescriptor

构造器详细资料

Operator

public Operator(String payload,
 int startPos,
 int endPos,
 SpelNodeImpl... operands)

方法详细资料

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] ')'.

返回:

the string form

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,
 @Nullable
 Object left,
 @Nullable
 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.

参数:

context - the current evaluation context

left - the left-hand operand value

right - the right-hand operand value