org.springframework.expression.spel.ast

Class OpMultiply

  • All Implemented Interfaces:
    Opcodes, SpelNode


    public class OpMultiply
    extends Operator
    Implements the multiply operator.

    Conversions and promotions are handled as defined in Section 5.6.2 of the Java Language Specification, with the addiction of BigDecimal/BigInteger management:

    If any of the operands is of a reference type, unboxing conversion (Section 5.1.8) is performed. Then:
    If either operand is of type BigDecimal, the other is converted to BigDecimal.
    If either operand is of type double, the other is converted to double.
    Otherwise, if either operand is of type float, the other is converted to float.
    If either operand is of type BigInteger, the other is converted to BigInteger.
    Otherwise, if either operand is of type long, the other is converted to long.
    Otherwise, both operands are converted to type int.

    Since:
    3.0
    Author:
    Andy Clement, Juergen Hoeller, Sam Brannen, Giovanni Dall'Oglio Risso
    • Constructor Detail

      • OpMultiply

        public OpMultiply(int pos,
                          SpelNodeImpl... operands)
    • Method Detail

      • 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.
        Overrides:
        isCompilable in class SpelNodeImpl
        Returns:
        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. For example it will include information about the type of the object currently on the stack.
        Overrides:
        generateCode in class SpelNodeImpl
        Parameters:
        mv - the ASM MethodVisitor into which code should be generated
        cf - a context object with info about what is on the stack