类 Expression.Function

  • 封闭类:
    Expression

    public abstract class Expression.Function
    extends java.lang.Object
    Abstract definition of a supported expression function. A function is defined by a name, the number of parameters and the actual processing implementation.
    • 构造器概要

      构造器 
      构造器 说明
      Function​(java.lang.String name, int numParams)
      Creates a new function with given name and parameter count.
    • 方法概要

      所有方法 实例方法 抽象方法 具体方法 
      修饰符和类型 方法 说明
      abstract java.math.BigDecimal eval​(java.util.List<java.math.BigDecimal> parameters)
      Implementation for this function.
      java.math.BigDecimal eval​(java.util.Map<java.lang.String,​java.lang.Object> variables, java.util.List<java.lang.Object> parameters)  
      java.lang.String getName()  
      int getNumParams()  
      java.lang.String toString()  
      • 从类继承的方法 java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
    • 构造器详细资料

      • Function

        public Function​(java.lang.String name,
                        int numParams)
        Creates a new function with given name and parameter count.
        参数:
        name - The name of the function.
        numParams - The number of parameters for this function.
    • 方法详细资料

      • getName

        public java.lang.String getName()
      • getNumParams

        public int getNumParams()
      • eval

        public java.math.BigDecimal eval​(java.util.Map<java.lang.String,​java.lang.Object> variables,
                                         java.util.List<java.lang.Object> parameters)
      • eval

        public abstract java.math.BigDecimal eval​(java.util.List<java.math.BigDecimal> parameters)
        Implementation for this function.
        参数:
        parameters - Parameters will be passed by the expression evaluator as a List of BigDecimal values.
        返回:
        The function must return a new BigDecimal value as a computing result.
      • toString

        public java.lang.String toString()
        覆盖:
        toString 在类中 java.lang.Object