All Implemented Interfaces:
Opcodes, SpelNode

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.

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

    • OpMinus

      public OpMinus(int startPos, int endPos, SpelNodeImpl... operands)
  • Method Details

    • getValueInternal

      public TypedValue getValueInternal(ExpressionState state) throws EvaluationException
      Specified by:
      getValueInternal in class SpelNodeImpl
    • toStringAST

      public String toStringAST()
      Description copied from class: Operator
      String format for all operators is the same '(' [operand] [operator] [operand] ')'.
      Specified by:
      toStringAST in interface SpelNode
      toStringAST in class Operator
      the string form
    • getRightOperand

      public SpelNodeImpl getRightOperand()
      getRightOperand in class Operator
    • isCompilable

      public boolean isCompilable()
      Description copied from class: SpelNodeImpl
      Check 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.
      isCompilable in class SpelNodeImpl
      true if this node can be compiled to bytecode
    • generateCode

      public void generateCode(MethodVisitor mv, CodeFlow cf)
      Description copied from class: SpelNodeImpl
      Generate the bytecode for this node into the supplied visitor. Context info about the current expression being compiled is available in the codeflow object, e.g. including information about the type of the object currently on the stack.
      generateCode in class SpelNodeImpl
      mv - the ASM MethodVisitor into which code should be generated
      cf - a context object with info about what is on the stack