org.hsqldb.cmdline.sqltool

Class Calculator

java.lang.Object

org.hsqldb.cmdline.sqltool.Calculator

public class Calculator
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
Calculator(java.lang.String[] sa, java.util.Map<java.lang.String,java.lang.String> vars)
Calculator(java.lang.String s, java.util.Map<java.lang.String,java.lang.String> vars) Every integer, var name, and single-math-op-character get their own tokens here.

Method Summary

Modifier and Type	Method and Description
static void	main(java.lang.String[] sa)
static long	reassignValue(java.lang.String assignee, java.util.Map<java.lang.String,java.lang.String> valMap, java.lang.String opStr, java.lang.String expr) Does not actually do the assigment, but validates the input variable and returns the value ready to be assigned to it.
long	reduce(int startAtomIndex, boolean stopAtParenClose) If atoms[startAtomIndex] == '(', then last visited atoms will be the next top-level (un-paired) ')'.
java.lang.String	toString()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Calculator

public Calculator(java.lang.String[] sa,
                  java.util.Map<java.lang.String,java.lang.String> vars)

Calculator

public Calculator(java.lang.String s,
                  java.util.Map<java.lang.String,java.lang.String> vars)

Every integer, var name, and single-math-op-character get their own tokens here. Special processesing is needed afterwards because negative signs get separated into separate tokens.

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

reduce

public long reduce(int startAtomIndex,
                   boolean stopAtParenClose)

If atoms[startAtomIndex] == '(', then last visited atoms will be the next top-level (un-paired) ')'. Otherwise, all remainign atoms will be visited. Every visited atom will be removed from 'atoms'.

main

public static void main(java.lang.String[] sa)

reassignValue

public static long reassignValue(java.lang.String assignee,
                                 java.util.Map<java.lang.String,java.lang.String> valMap,
                                 java.lang.String opStr,
                                 java.lang.String expr)

Does not actually do the assigment, but validates the input variable and returns the value ready to be assigned to it.