com.ds.common.expression.function.logical

类 Comparative

java.lang.Object

com.ds.common.expression.function.Function

com.ds.common.expression.function.logical.Comparative

所有已实现的接口:

FunctionI

public class Comparative
extends Function

Title: ETCL

Description: 数据更新工具（抽取，转换，清洗，装载）

比较函数。比较数值与数值，字符串与字符串的大小，返回true或false。 同时对参数为列表的情况也列表适用。

Copyright: Copyright spk (c) 2003

Company: spk

版本:

1.0

作者:

chenjie

字段概要

从类继承的字段 com.ds.common.expression.function.Function

curNumberOfParameters, numberOfParameters

构造器概要

构造器

构造器和说明
Comparative(int id_in)

方法概要

限定符和类型	方法和说明
protected Object	cmp(double x, double y)
protected List	cmp(double x, List y)
protected List	cmp(List x, double y)
protected List	cmp(List x, List y)
protected List	cmp(List x, String y)
protected Object	cmp(Object param1, Object param2)
protected List	cmp(String x, List y)
protected Object	cmp(String x, String y)
void	run(Stack stack) Throws an exception because this method should never be called under normal circumstances.

从类继承的方法 com.ds.common.expression.function.Function

checkStack, getNumberOfParameters, setCurNumberOfParameters

从类继承的方法 java.lang.Object

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

构造器详细资料

Comparative

public Comparative(int id_in)

方法详细资料

run

public void run(Stack stack)
         throws ParseException

从类复制的说明: Function

Throws an exception because this method should never be called under normal circumstances. Each function should use it's own run() method for evaluating the function. This includes popping off the parameters from the stack, and pushing the result back on the stack.

指定者:

run 在接口中 FunctionI

指定者:

run 在类中 Function

抛出:

ParseException

cmp

protected Object cmp(Object param1,
                     Object param2)
              throws ParseException

抛出:

ParseException

cmp

protected Object cmp(double x,
                     double y)
              throws ParseException

抛出:

ParseException

cmp

protected Object cmp(String x,
                     String y)
              throws ParseException

抛出:

ParseException

cmp

protected List cmp(List x,
                   String y)
            throws ParseException

抛出:

ParseException

cmp

protected List cmp(String x,
                   List y)
            throws ParseException

抛出:

ParseException

cmp

protected List cmp(List x,
                   double y)
            throws ParseException

抛出:

ParseException

cmp

protected List cmp(double x,
                   List y)
            throws ParseException

抛出:

ParseException

cmp

protected List cmp(List x,
                   List y)
            throws ParseException

抛出:

ParseException