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FuncInvSep.java
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FuncInvSep.java
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/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package Calculus;
import static Calculus.MathsContxtLAv.NormalNotPareFlag;
import static Calculus.MathsContxtLAv.ParenthesisFlag;
import static Calculus.MathsContxtLAv.Str;
import static Calculus.MathsContxtLAv.StrIsAConstant;
import static Calculus.MathsContxtLAv.ch;
import static Calculus.MathsContxtLAv.pos;
import static Calculus.UsageCalculus.DiffWithRespTo;
import java.util.HashMap;
import java.util.Map;
import java.util.function.DoubleUnaryOperator;
import org.apache.log4j.Logger;
/**
*
* @author Administrator
*/
public class FuncInvSep {
public static Logger log = Logger.getLogger(FuncInvSep.class.getName());
//Important Mapping Variables
static Map<String, Double> variables = new HashMap<>();
private static Map<String, DoubleUnaryOperator> functions = new HashMap<>();
// Global Variables && Functions
// Simple Expression & Simple Term character Index and Character Variable
//private static int pos = -1, ch;
//private static int chNext, chTerm, posTerm = -1;
//private static String Str;
//private static String StrIsAConstant = "";
//private static boolean NormalNotPareFlag = true;
static boolean ZeroTermSignFlag = false;
//private static int ParenthesisOperator = 0;
//private static boolean ParenthesisFlag = false;
static boolean IsAConstant(String StrX1, String DiffWithRespTo) {
try {
StrIsAConstant = "Unknown";
String StrX = StrX1;
//log.info("IsAConstant:StrIsAConstant=" + StrIsAConstant);
log.info("IsAConstant:StrX=" + StrX);
log.info("IsAConstant:DiffWithRespTo=" + DiffWithRespTo);
// if ((StrX != null)
// && (!StrX.equalsIgnoreCase(""))
// && (!StrX.contains(DiffWithRespTo))
// && (StrX.matches("[-+]+"))) {
// StrIsAConstant = "Number";
// log.info("IsAConstant:StrIsAConstant=" + StrIsAConstant);
// return true;
// } else
if ((StrX != null)
&& (!StrX.equalsIgnoreCase(""))
&& (!StrX.contains(DiffWithRespTo))
&& (StrX.matches("[\\-\\+]*[0-9\\.]+"))
//&& (!StrX.matches("[\\-\\+]*[a-zA-Z0-9]+"))
&& (Double.isFinite(Double.valueOf(StrX)))) {
StrIsAConstant = "Number";
log.info("IsAConstant:StrIsAConstant=" + StrIsAConstant + " DiffWithRespTo=" + DiffWithRespTo);
return true;
} else if ((StrX != null)
&& (!StrX.equalsIgnoreCase(""))
&& (!StrX.contains(DiffWithRespTo))
&& (StrX.matches("[\\+\\-\\*/]*[a-zA-Z0-9]+"))) {
StrIsAConstant = "IndConstant";
log.info("IsAConstant:StrIsAConstant=" + StrIsAConstant + " DiffWithRespTo=" + DiffWithRespTo);
return false;
} else if ((StrX != null)
&& (!StrX.equalsIgnoreCase(""))
&& (!StrX.contains(DiffWithRespTo))
&& (StrX.matches("[\\-\\+\\*/]*[0-9\\.]+"))) {
StrIsAConstant = "NumberExpression";
log.info("IsAConstant:StrIsAConstant=" + StrIsAConstant + " DiffWithRespTo=" + DiffWithRespTo);
return true;
} else if ((StrX != null)
&& (!StrX.equalsIgnoreCase(""))
&& (!StrX.equalsIgnoreCase(DiffWithRespTo))
&& (!StrX.contains(DiffWithRespTo))
&& (StrX.matches("[\\+\\-\\*/]*[a-zA-Z0-9\\.]+[\\^]*[0-9\\.]+"))) {
StrIsAConstant = "IndConstantExpression";
log.info("IsAConstant:StrIsAConstant=" + StrIsAConstant + " DiffWithRespTo=" + DiffWithRespTo);
return false;
} else if ((StrX != null)
&& (!StrX.equalsIgnoreCase(""))
&& (StrX.equalsIgnoreCase(DiffWithRespTo))
&& (StrX.matches("[\\+\\-\\*\\^/]*[a-zA-Z0-9]+"))) {
StrIsAConstant = "Var";
log.info("IsAConstant:StrIsAConstant=" + StrIsAConstant + " DiffWithRespTo=" + DiffWithRespTo);
return false;
} else if ((StrX != null)
&& (!StrX.equalsIgnoreCase(""))
&& ((StrX.equalsIgnoreCase(DiffWithRespTo))
|| ((StrX.contains(DiffWithRespTo)) && ((!StrX.contains(DiffWithRespTo + "^")))))
&& (StrX.matches("[\\+\\-\\*\\^/]*[a-zA-Z0-9]+"))) {
StrIsAConstant = "Var";
log.info("IsAConstant:StrIsAConstant=" + StrIsAConstant + " DiffWithRespTo=" + DiffWithRespTo);
return false;
} else if ((StrX != null)
&& (!StrX.equalsIgnoreCase(""))
&& (StrX.contains(DiffWithRespTo))) {
StrIsAConstant = "VarExpression";
log.info("IsAConstant:StrIsAConstant=" + StrIsAConstant + " DiffWithRespTo=" + DiffWithRespTo);
return false;
} else if ((StrIsAConstant.equalsIgnoreCase("Unknown")) && (StrX != null)
&& (!StrX.equalsIgnoreCase(""))
&& (!StrX.contains(DiffWithRespTo))
&& ((StrX.contains("E-")) || (StrX.contains("E+")) || (StrX.contains("e+")) || (StrX.contains("e-")))
&& (Double.isFinite(Double.valueOf(StrX)))) {
StrIsAConstant = "Number";
log.info("IsAConstant:StrIsAConstant=" + StrIsAConstant + " DiffWithRespTo=" + DiffWithRespTo);
return true;
} else if (StrIsAConstant.equalsIgnoreCase("Unknown") && (StrX != null)
&& (!StrX.equalsIgnoreCase(""))
&& (StrX.matches("[\\+\\-]*[a-zA-Z0-9\\.]+"))
&& (StrX.matches(DiffWithRespTo))) {
StrIsAConstant = "VarExpression";
log.info("IsAConstant:StrIsAConstant=" + StrIsAConstant + " DiffWithRespTo=" + DiffWithRespTo);
return false;
} else if ((StrX != null)
&& (!StrX.equalsIgnoreCase(""))
&& (!StrX.contains(DiffWithRespTo))
&& ((StrX.matches("[\\+\\-]*[0-9\\.\\*\\^/]+[0-9\\.]*"))
|| (StrX.matches("[\\+\\-]*[0-9\\.\\*/]*\\^[0-9\\.\\*\\^/]+")))) {
StrIsAConstant = "NumberExpression";
log.info("IsAConstant:StrIsAConstant=" + StrIsAConstant + " DiffWithRespTo=" + DiffWithRespTo);
return true;
} else if ((StrIsAConstant.equalsIgnoreCase("Unknown") && (StrX != null)
&& (!StrX.equalsIgnoreCase(""))
&& ((StrX.matches("[\\+\\-]*[a-zA-Z0-9\\.\\*\\^/]+[\\+\\-]*[0-9\\.]*"))
|| (StrX.matches("[\\+\\-]*[0-9\\.\\*/]*\\^[a-zA-Z0-9\\.\\*\\^/]+"))))) {
StrIsAConstant = "IndConstantExpression";
log.info("IsAConstant:StrIsAConstant=" + StrIsAConstant + " DiffWithRespTo=" + DiffWithRespTo);
return false;
}
} catch (NumberFormatException ConstExp) {
log.info("IsAConstant:Exception:StrIsAConstant=" + StrIsAConstant + " DiffWithRespTo=" + DiffWithRespTo);
}
log.info("IsAConstant:StrIsAConstant=" + StrIsAConstant + " DiffWithRespTo=" + DiffWithRespTo);
return false;
}
public static boolean IsNumber(int Mych) {
return ((((Mych >= '0') && (Mych <= '9')) || (Mych == '.')));
}
public static boolean IsVariable(int Mych) {
return (((Mych >= 'a') && (Mych <= 'z')) || ((Mych >= 'A') && (Mych <= 'Z')));
}
public static boolean IsIndConstant(int Mych) {
return ((((Mych >= 'a') && (Mych <= 'z')) || ((Mych >= 'A') && (Mych <= 'Z'))) && (variables.containsKey(Mych)));
}
public static boolean IsNotAVariable(int Mych) {
return (((Mych < 'a') && (Mych > 'z')) && ((Mych < 'A') && (Mych > 'Z')));
}
public static boolean IsOperator(int Mych) {
return (((Mych == '+') || (Mych == '-') || (Mych == '*') || (Mych == '/') || (Mych == '^')));
}
public static boolean IsNotANumber(int Mych) {
return (((Mych < '0') && (Mych > '9')) && (Mych != '.'));
}
public static boolean IsNotAnOperator(int Mych) {
return (((Mych != '+') && (Mych != '-') && (Mych != '*') && (Mych != '/') && (Mych != '^')));
}
public static boolean IsLogicalOperator(int Mych) {
return (((Mych == '>') || (Mych == '<') || (Mych == '=') || (Mych == '&') || (Mych == '|') || (Mych == '!')));
}
public static boolean IsNullEmpty(String MyString) {
return ((MyString == null) || (MyString.equalsIgnoreCase("")) || (MyString.equalsIgnoreCase("0.0")) || (MyString.equalsIgnoreCase("+0.0")) || (MyString.equalsIgnoreCase("-0.0")));
}
public static boolean IsNullEmptyZero(String MyString) {
return ((MyString == null) || (MyString.equalsIgnoreCase("")) || (MyString.equalsIgnoreCase("0.0")) || (MyString.equalsIgnoreCase("+0.0")) || (MyString.equalsIgnoreCase("-0.0")));
}
public static boolean IsNotNullAndEmptyAndZero(String MyString) {
return ((MyString != null) && (!MyString.equalsIgnoreCase("")) && (!MyString.equalsIgnoreCase("0.0")) && (!MyString.equalsIgnoreCase("+0.0")) && (!MyString.equalsIgnoreCase("-0.0")));
}
public static boolean IsHighLvlNumberExprn(String MyString, String DiffWithRespTo) {
int startPos = 0;
int Mych = 0;
if (MyString.length() >= 1) {
Mych = MyString.charAt(startPos);
} else if ((MyString == null) || (MyString.isEmpty())) {
Mych = -1;
}
int i = 0;
double xx = 1.0;
boolean EnteredLoopFlag = false;
//numbers
while ((MyString != null) && (!MyString.equalsIgnoreCase("")) && (MyString.length() > 1) && (i < MyString.length()) && (Mych != -1) && (Mych != 0) && (IsNumber(Mych))) {
Mych = MyString.charAt(i);
i++;
EnteredLoopFlag = true;
}
if ((EnteredLoopFlag == true) && (MyString != null) && (!MyString.equalsIgnoreCase("")) && (!MyString.equalsIgnoreCase("NaN")) && (i == MyString.length())) {
//xx = Double.parseDouble(MyString);
if ((MyString.contains("-")) || (MyString.contains("+")) || (MyString.contains("*")) || (MyString.contains("/"))) {
return true;
}
} else if (IsAConstant(MyString, DiffWithRespTo)) {
return false;
}
return false;
}
static void nextChar() {
++pos;
ch = (pos < Str.length()) ? Str.charAt(pos) : -1;
if ((ch == -1) && (pos >= Str.length())) {
pos = Str.length();
} else if ((ch == -1) || ((ch == 0))) {
throw new RuntimeException("nextChar:nextChar:Unexpected: " + (char) ch + " int=" + (int) ch + " Cannot Format:" + Str.substring(pos, Str.length()));
}
}
static void prevChar() {
--pos;
ch = (pos >= 0) ? Str.charAt(pos) : -1;
if ((ch == -1) && (pos < 0))
; else if ((ch == -1) || ((ch == 0))) {
throw new RuntimeException("prevChar:prevChar:Unexpected: " + (char) ch + " int=" + (int) ch + " Cannot Format:" + Str.substring(pos, Str.length()));
}
}
static boolean eat(int CharToEat) {
while (ch == ' ') {
nextChar();
}
if (ch == CharToEat) {
nextChar();
return true;
}
return false;
}
public static String eatAll(String Temp, int CharToEat) {
String MyTempString = "";
//if (Temp.equalsIgnoreCase("")) {
// Temp = Str;
//}
for (int i = 0; (i < Temp.length());) {
if (CharToEat == Temp.charAt(i)) {
i++;
} else {
MyTempString = MyTempString + Temp.charAt(i);
i++;
}
}
return MyTempString;
}
void SyncChar() {
if ((pos < Str.length())
&& (Str.charAt(pos) != ch)) {
if (Str.charAt(pos + 1) == ch) {
pos++;
} else if (Str.charAt(pos - 1) == ch) {
pos--;
}
}
}
//Created by Rajesh Pai
// Converts Function Inverse to a Single Value
@FunctionalInterface
public interface FuncInv {
String evalStr();
}
public static FuncInv parseFInverse(String str, Map<String, Double> variables, String DiffWithRespTo, String OutputVar, String BernsteinChoices) {
return new Object() {
FuncInv parse() {
Str = str;
FuncInv x = (() -> "" + 0.0);
if (Str.length() >= 1) {
pos = 0;
ch = Str.charAt(0);
} else if (Str.length() <= 0) {
return x;
}
ParenthesisFlag = false;
NormalNotPareFlag = true;
ZeroTermSignFlag = false;
log.info("FuncInv:parseExpression:Initial:Str=" + Str);
if ((Str.length() > 0)
&& (Str.length() < 2)
&& ((ch == '*')
|| (ch == '/')
|| (ch == '^'))) {
return x;
} else {
x = parseExpression();
}
// if ((pos != -1)&&(str != null)&&(!str.equalsIgnoreCase(""))&&(str.substring(pos, str.length()).equalsIgnoreCase(""))&&(pos <= str.length())) {
// throw new RuntimeException("Expression:parse:Unexpected: " + (char) ch + " int=" + (int) ch + " pos=" + pos + " str=" + str.substring(pos, str.length()));
// }
return x;
}
//Grammar:
//expression = term | expression '+' term |expression '-' term
//term = factor | term '*' factor | term '/' factor
//factor = base | base ^ base
//base = '-' base | '+' base | number | identifier |function expression | '(' expression ')'
//
FuncInv parseExpression() {
FuncInv x = (() -> "" + 0.0);
int ExprStartPos = pos;
int ExprEndPos = -1;
if (pos < 0) {
ExprStartPos = 0;
}
x = parseTerm();
if ((IsAConstant(x.evalStr(), DiffWithRespTo)) && (StrIsAConstant.equalsIgnoreCase("Number"))) {
String Temp = x.evalStr();
x = (() -> "-" + Temp);
log.info("FuncInv:parseExpression:Number:x.evalStr=" + x.evalStr());
}
log.info("FuncInv:parseExpression:Initial:x.evalStr=" + x.evalStr());
for (;;) {
log.info("FuncInv:Expression:Top:Inside Loop: parseExpression:ParenthesisFlag=" + ParenthesisFlag + " NormalNotPareFlag=" + NormalNotPareFlag + " ch=" + (char) ch + " pos=" + pos);
if (eat(')')) {
return x;
} else if ((eat('+'))) {// addition
FuncInv a = x, b = parseTerm();
if (BernsteinChoices.equalsIgnoreCase("Bernstein")) {
// Benstein Laws Go Below Begin
//Rajesh Pai
//Rajesh Pai
// Benstein Laws Go Below End
} else if (BernsteinChoices.equalsIgnoreCase("Choices")) {
// Choices Laws Go Below Begin
//Rajesh Pai
//Rajesh Pai
// Choices Laws Go Below End
} else {
if (ZeroTermSignFlag == true) {
if ((IsAConstant(b.evalStr(), DiffWithRespTo)) && (StrIsAConstant.equalsIgnoreCase("Number"))) {
String Temp = x.evalStr().replace(OutputVar, OutputVar + "-" + b.evalStr());
x = (() -> Temp);
log.info("FuncInv:parseExpression:Number:x.evalStr=" + x.evalStr() + " a.evalStr()=" + a.evalStr() + "- b.evalStr()=" + b.evalStr());
} else if ((IsAConstant(a.evalStr(), DiffWithRespTo))
|| ((!IsAConstant(a.evalStr(), OutputVar)) && (StrIsAConstant.equalsIgnoreCase("Var")))
&& ((IsAConstant(b.evalStr(), DiffWithRespTo))
|| ((!IsAConstant(b.evalStr(), OutputVar)) && (StrIsAConstant.equalsIgnoreCase("Var"))))) {
x = (() -> "" + (-1.0 * Double.parseDouble(a.evalStr()) - Double.parseDouble(b.evalStr())));
log.info("FuncInv:parseExpression:Number:x.evalStr=" + x.evalStr() + " a.evalStr()=" + a.evalStr() + "- b.evalStr()=" + b.evalStr());
} else {
x = (() -> "" + Double.POSITIVE_INFINITY);
}
log.info("FuncInv:parseExpression:Number:x.evalStr=" + x.evalStr() + " a.evalStr()=" + a.evalStr() + "- b.evalStr()=" + b.evalStr());
ZeroTermSignFlag = false;
} else {
if ((IsAConstant(b.evalStr(), DiffWithRespTo)) && (StrIsAConstant.equalsIgnoreCase("Number"))) {
String Temp = x.evalStr().replace(OutputVar, OutputVar + "-" + b.evalStr());
x = (() -> Temp);
log.info("FuncInv:parseExpression:x.evalStr=" + x.evalStr() + " a.evalStr()=" + a.evalStr() + "- b.evalStr()=" + b.evalStr());
} else if ((IsAConstant(a.evalStr(), DiffWithRespTo))
|| ((!IsAConstant(a.evalStr(), OutputVar)) && (StrIsAConstant.equalsIgnoreCase("Var")))
&& ((IsAConstant(b.evalStr(), DiffWithRespTo))
|| ((!IsAConstant(b.evalStr(), OutputVar)) && (StrIsAConstant.equalsIgnoreCase("Var"))))) {
if (((!IsAConstant(b.evalStr(), OutputVar)) && (StrIsAConstant.equalsIgnoreCase("Var")))) {
x = (() -> "" + a.evalStr() + "+" + OutputVar);
log.info("FuncInv:parseExpression:x.evalStr=" + x.evalStr() + " a.evalStr()=" + a.evalStr() + "- b.evalStr()=" + b.evalStr());
} else {
x = (() -> "" + a.evalStr() + "-" + b.evalStr());
}
log.info("FuncInv:parseExpression:x.evalStr=" + x.evalStr() + " a.evalStr()=" + a.evalStr() + "- b.evalStr()=" + b.evalStr());
} else {
x = (() -> "" + Double.POSITIVE_INFINITY);
}
log.info("FuncInv:parseExpression:x.evalStr=" + x.evalStr() + " a.evalStr()=" + a.evalStr() + "- b.evalStr()=" + b.evalStr());
}
}
log.info("FuncInv:parseExpression:x.evalStr=" + x.evalStr() + " a.evalStr()=" + a.evalStr() + "- b.evalStr()=" + b.evalStr());
} else if ((eat('-'))) { // subtraction
FuncInv a = x, b = parseTerm();
if (BernsteinChoices.equalsIgnoreCase("Bernstein")) {
// Benstein Laws Go Below Begin
//Rajesh Pai
//Rajesh Pai
// Benstein Laws Go Below End
} else if (BernsteinChoices.equalsIgnoreCase("Choices")) {
// Choices Laws Go Below Begin
//Rajesh Pai
//Rajesh Pai
// Choices Laws Go Below End
} else {
if (ZeroTermSignFlag == true) {
if ((IsAConstant(b.evalStr(), DiffWithRespTo)) && (StrIsAConstant.equalsIgnoreCase("Number"))) {
String Temp = x.evalStr().replace(OutputVar, OutputVar + "+" + b.evalStr());
x = (() -> Temp);
log.info("FuncInv:parseExpression:Number:x.evalStr=" + x.evalStr() + " a.evalStr()=" + a.evalStr() + "+ b.evalStr()=" + b.evalStr());
} else if ((IsAConstant(a.evalStr(), DiffWithRespTo))
|| ((!IsAConstant(a.evalStr(), OutputVar)) && (StrIsAConstant.equalsIgnoreCase("Var")))
&& ((IsAConstant(b.evalStr(), DiffWithRespTo))
|| ((!IsAConstant(b.evalStr(), OutputVar)) && (StrIsAConstant.equalsIgnoreCase("Var"))))) {
x = (() -> "" + (-1.0 * Double.parseDouble(a.evalStr()) + Double.parseDouble(b.evalStr())));
log.info("FuncInv:parseExpression:Number:x.evalStr=" + x.evalStr() + " a.evalStr()=" + a.evalStr() + "+ b.evalStr()=" + b.evalStr());
} else {
x = (() -> "" + Double.POSITIVE_INFINITY);
}
ZeroTermSignFlag = false;
log.info("FuncInv:parseExpression:Number:x.evalStr=" + x.evalStr() + " a.evalStr()=" + a.evalStr() + "+ b.evalStr()=" + b.evalStr());
} else {
if ((IsAConstant(b.evalStr(), DiffWithRespTo)) && (StrIsAConstant.equalsIgnoreCase("Number"))) {
String Temp = x.evalStr().replace(OutputVar, OutputVar + "+" + b.evalStr());
x = (() -> Temp);
log.info("FuncInv:parseExpression:x.evalStr=" + x.evalStr() + " a.evalStr()=" + a.evalStr() + "+ b.evalStr()=" + b.evalStr());
} else if ((IsAConstant(a.evalStr(), DiffWithRespTo))
|| ((!IsAConstant(a.evalStr(), OutputVar)) && (StrIsAConstant.equalsIgnoreCase("Var")))
&& ((IsAConstant(b.evalStr(), DiffWithRespTo))
|| ((!IsAConstant(b.evalStr(), OutputVar)) && (StrIsAConstant.equalsIgnoreCase("Var"))))) {
if (((!IsAConstant(b.evalStr(), OutputVar)) && (StrIsAConstant.equalsIgnoreCase("Var")))) {
x = (() -> "" + a.evalStr() + "-" + OutputVar);
log.info("FuncInv:parseExpression:x.evalStr=" + x.evalStr() + " a.evalStr()=" + a.evalStr() + "+ b.evalStr()=" + b.evalStr());
} else {
x = (() -> "" + a.evalStr() + "+" + b.evalStr());
}
log.info("FuncInv:parseExpression:x.evalStr=" + x.evalStr() + " a.evalStr()=" + a.evalStr() + "+ b.evalStr()=" + b.evalStr());
} else {
x = (() -> "" + Double.POSITIVE_INFINITY);
}
log.info("FuncInv:parseExpression:x.evalStr=" + x.evalStr() + " a.evalStr()=" + a.evalStr() + "+ b.evalStr()=" + b.evalStr());
}
}
log.info("FuncInv:parseExpression:x.evalStr=" + x.evalStr() + " a.evalStr()=" + a.evalStr() + "- b.evalStr()=" + b.evalStr());
} else {
if ((pos >= 0) && (pos < Str.length())) {
ExprEndPos = pos;
} else {
ExprEndPos = Str.length();
}
if ((ExprStartPos > ExprEndPos)) {
ExprEndPos = Str.length();
}
log.info("FuncInv:parseExpression:Return Value:x.evalStr=" + x.evalStr() + " Expr=" + Str.substring(ExprStartPos, ExprEndPos));
log.warn("FuncInv:parseExpression:Return Value:x.evalStr=" + x.evalStr() + " Expr=" + Str.substring(ExprStartPos, ExprEndPos));
return x;
}
}
}
FuncInv parseTerm() {
int TermStartPos = pos;
int TermEndPos = -1;
if (pos < 0) {
TermStartPos = 0;
}
FuncInv x = parseFactor();
log.info("FuncInv:parseTerm:Initial:x.evalStr=" + x.evalStr());
for (;;) {
FuncInv a = x;
if (eat('*')) { // multiplication
FuncInv b = parseFactor();
if (BernsteinChoices.equalsIgnoreCase("Bernstein")) {
// Benstein Laws Go Below Begin
//Rajesh Pai
//Rajesh Pai
// Benstein Laws Go Below End
} else if (BernsteinChoices.equalsIgnoreCase("Choices")) {
// Choices Laws Go Below Begin
//Rajesh Pai
//Rajesh Pai
// Choices Laws Go Below End
} else {
if ((IsAConstant(a.evalStr(), DiffWithRespTo))
|| ((!IsAConstant(a.evalStr(), OutputVar)) && (StrIsAConstant.equalsIgnoreCase("Var")))
&& ((IsAConstant(b.evalStr(), DiffWithRespTo))
|| ((!IsAConstant(b.evalStr(), OutputVar)) && (StrIsAConstant.equalsIgnoreCase("Var"))))) {
if ((IsAConstant(a.evalStr(), DiffWithRespTo)) && (StrIsAConstant.equalsIgnoreCase("Number"))
&& (!IsAConstant(b.evalStr(), OutputVar)) && (StrIsAConstant.equalsIgnoreCase("Var"))) {
x = (() -> "(" + b.evalStr() + ")" + "/" + a.evalStr());
log.info("FuncInv:parseTerm:*:x.evalStr=" + x.evalStr() + " a.evalStr()=" + a.evalStr() + "* b.evalStr()=" + b.evalStr());
} else {
x = (() -> "(" + a.evalStr() + ")" + "/" + b.evalStr());
log.info("FuncInv:parseTerm:*:x.evalStr=" + x.evalStr() + " a.evalStr()=" + a.evalStr() + "* b.evalStr()=" + b.evalStr());
}
} else {
x = (() -> "" + Double.POSITIVE_INFINITY);
}
}
log.info("FuncInv:parseTerm:*:a.evalStr=" + a.evalStr());
log.info("FuncInv:parseTerm:*:b.evalStr=" + b.evalStr());
log.info("FuncInv:parseTerm:*:x.evalStr=" + x.evalStr() + " a.evalStr()=" + a.evalStr() + "* b.evalStr()=" + b.evalStr());
int temp = ch;
nextChar();
if (((ch == '+') || (ch == '-')) && (temp != '*') && (temp != '/')) {
pos--;
ch = temp;
return x;
} else if ((ch != -1) && (ch != 0)) {
pos--;
ch = temp;
}
} else if (eat('/')) { // division
FuncInv b = parseFactor();
if (BernsteinChoices.equalsIgnoreCase("Bernstein")) {
// Benstein Laws Go Below Begin
//Rajesh Pai
//Rajesh Pai
// Benstein Laws Go Below End
} else if (BernsteinChoices.equalsIgnoreCase("Choices")) {
// Choices Laws Go Below Begin
//Rajesh Pai
//Rajesh Pai
// Choices Laws Go Below End
} else {
if ((IsAConstant(a.evalStr(), DiffWithRespTo))
|| ((!IsAConstant(a.evalStr(), OutputVar)) && (StrIsAConstant.equalsIgnoreCase("Var")))
&& ((IsAConstant(b.evalStr(), DiffWithRespTo))
|| ((!IsAConstant(b.evalStr(), OutputVar)) && (StrIsAConstant.equalsIgnoreCase("Var"))))) {
if ((!IsAConstant(b.evalStr(), OutputVar)) && (StrIsAConstant.equalsIgnoreCase("Var"))) {
x = (() -> a.evalStr() + "/" + b.evalStr());
log.info("FuncInv:parseTerm:/:x.evalStr=" + x.evalStr() + " a.evalStr()=" + a.evalStr() + "/ b.evalStr()=" + b.evalStr());
} else {
x = (() -> "(" + a.evalStr() + ")" + "*" + b.evalStr());
log.info("FuncInv:parseTerm:/:x.evalStr=" + x.evalStr() + " a.evalStr()=" + a.evalStr() + "/ b.evalStr()=" + b.evalStr());
}
} else {
x = (() -> "" + Double.POSITIVE_INFINITY);
}
}
log.info("FuncInv:parseTerm:/:a.evalStr=" + a.evalStr());
log.info("FuncInv:parseTerm:/:b.evalStr=" + b.evalStr());
log.info("FuncInv:parseTerm:/:x.evalStr=" + x.evalStr() + " a.evalStr()=" + a.evalStr() + "/ b.evalStr()=" + b.evalStr());
int temp = ch;
nextChar();
if (((ch == '+') || (ch == '-')) && (temp != '*') && (temp != '/')) {
pos--;
ch = temp;
return x;
} else if ((ch != -1) && (ch != 0)) {
pos--;
ch = temp;
}
} else {
if ((pos >= 0) && (pos < Str.length())) {
TermEndPos = pos;
} else {
TermEndPos = Str.length();
}
if ((TermStartPos > TermEndPos)) {
TermEndPos = Str.length();
}
log.info("FuncInv:parseTerm:Return Value:x.evalStr=" + x.evalStr() + " Term=" + Str.substring(TermStartPos, TermEndPos));
log.warn("FuncInv:parseTerm:Return Value:x.evalStr=" + x.evalStr() + " Term=" + Str.substring(TermStartPos, TermEndPos));
return x;
}
}
}
FuncInv parseFactor() {
int FactorStartPos = pos;
int FactorEndPos = -1;
if (pos < 0) {
FactorStartPos = 0;
}
FuncInv x = parseBase();
for (;;) {
if (eat('^')) { // exponentiation
//nextChar();
FuncInv a = x, b = parseBase();
if (BernsteinChoices.equalsIgnoreCase("Bernstein")) {
// Benstein Laws Go Below Begin
//Rajesh Pai
//Rajesh Pai
// Benstein Laws Go Below End
} else if (BernsteinChoices.equalsIgnoreCase("Choices")) {
// Choices Laws Go Below Begin
//Rajesh Pai
//Rajesh Pai
// Choices Laws Go Below End
} else {
if ((IsAConstant(a.evalStr(), DiffWithRespTo))
|| ((!IsAConstant(a.evalStr(), OutputVar)) && (StrIsAConstant.equalsIgnoreCase("Var")))
&& ((IsAConstant(b.evalStr(), DiffWithRespTo))
|| ((!IsAConstant(b.evalStr(), OutputVar)) && (StrIsAConstant.equalsIgnoreCase("Var"))))) {
x = (() -> "" + Math.pow(Double.parseDouble(b.evalStr()), Double.parseDouble(a.evalStr())));
} else {
x = (() -> "" + Double.POSITIVE_INFINITY);
}
}
log.info("FuncInv:parseFactor:x.evalStr=" + x.evalStr() + " Math.pow(a.evalStr()=" + a.evalStr() + "^ b.evalStr()=" + b.evalStr() + ")");
} else {
if ((pos >= 0) && (pos < Str.length())) {
FactorEndPos = pos;
} else {
FactorEndPos = Str.length();
}
if ((FactorStartPos > FactorEndPos)) {
FactorEndPos = Str.length();
}
log.info("FuncInv:parseFactor:FactorStartPos=" + FactorStartPos + " FactorEndPos=" + FactorEndPos);
log.info("FuncInv:parseFactor:Return Value:x.evalStr=" + x.evalStr() + " Factor=" + Str.substring(FactorStartPos, FactorEndPos));
log.warn("FuncInv:parseFactor:Return Value:x.evalStr=" + x.evalStr() + " Factor=" + Str.substring(FactorStartPos, FactorEndPos));
return x;
}
}
}
FuncInv parseBase() {
int startPos = pos;
FuncInv x = (() -> "" + 0.0);
if (pos >= str.length()) {
pos = -1;
ch = -1;
return x;
}
if ((eat('-')) && (startPos != 0)) { // unary minus
FuncInv b = parseBase();
x = (() -> "-" + b.evalStr());
log.info("FuncInv:parseBase:-:Return Value:x.evalStr=" + x.evalStr() + " startPos=" + startPos);
return x;
} else if (eat('+')) { // unary plus
x = parseBase();
log.info("FuncInv:parseBase:+:Return Value:x.evalStr=" + x.evalStr());
return x;
}
if (eat('(')) { //parentheses
//Code to handle Expressions:
int POpos = pos;
do {
pos--;
} while ((pos >= 0) && (pos < str.length()) && (!IsOperator(str.charAt(pos))));
pos = POpos;
ParenthesisFlag = true;
NormalNotPareFlag = false;
x = parseExpression();
eat(')');
ParenthesisFlag = false;
NormalNotPareFlag = true;
log.info("FuncInv:parseBase:(:Return Value:x.evalStr=" + x.evalStr());
return x;
} else if (IsNumber(ch)) { //numbers
while (IsNumber(ch)) {
nextChar();
if ((ch == 'E') || (ch == 'e')) {
nextChar();
if ((ch == '-') || (ch == '+')) {
nextChar();
}
}
}
double xx = 1.0;
if ((Str != null) && (!Str.equalsIgnoreCase("")) && (!Str.equalsIgnoreCase("NaN")) && (pos <= Str.length()) && (startPos <= (Str.length() - 1))) {
log.info("FuncInv:parseBase: Number=" + Str.substring(startPos, pos));
xx = Double.parseDouble(Str.substring(startPos, pos));
} else {
log.info("FuncInv:parseBase:NaN:Exp Form: Number=" + Str.substring(startPos, pos));
//xx=Double.parseDouble(String.format("%.12f"+StrRemoveEDbl(Str.substring(startPos, pos)) ) );
xx = Double.NaN;
pos = -1;
ch = -1;
}
final Double XX = xx;
x = () -> "" + XX;
log.info("FuncInv:parseBase:Number:Return Value:x.evalStr=" + x.evalStr());
return x;
} else if (IsVariable(ch)) {//functions & variables
while ((IsVariable(ch)) || (IsNumber(ch))) {
nextChar();
}
if ((startPos == 0) && (str.charAt(startPos) == '-')) {
startPos++;
ZeroTermSignFlag = true;
}
String name = str.substring(startPos, pos).trim();
if (functions.containsKey(name)) {
DoubleUnaryOperator func = functions.get(name);
FuncInv arg = parseExpression();
//x = () -> func.applyAsDouble(arg.eval());
} else {
if ((name != null) && (!name.equalsIgnoreCase("")) && (!name.equalsIgnoreCase("NaN")) && (variables.get(name) != null)) {
if (name.equalsIgnoreCase(DiffWithRespTo)) {
x = () -> OutputVar;
} else //Handling Independent Constants in FInverse
{
x = () -> name;
}
}
}
log.info("FuncInv:parseBase: Variable: name=" + name + " x.evalStr()=" + x.evalStr() + " startPos=" + startPos);
return x;
} else if (ch == ')') {
nextChar();
log.info("FuncInv:parseBase:):Return Value:x.evalStr=" + x.evalStr());
return x;
} else {
if ((str != null) && (startPos < str.length()) && (startPos < pos) && (ch != -1) && (ch != 0)) {
throw new RuntimeException("FuncInv:parseBase:Unexpected: " + (char) ch + " int=" + (int) ch + " Cannot Format:" + str.substring(pos, str.length()));
} else if ((ch != -1) && (ch != 0) && (pos >= 1) && (pos < Str.length()) && (IsNumber(ch))) {
throw new RuntimeException("FuncInv:parseBase:Please Check Code:Should not reach Here:Unexpected: " + (char) ch + " int=" + (int) ch + " Cannot Format:" + str.substring(pos, str.length()));
} else if ((ch != -1) && (ch != 0) && (pos >= 1) && (pos < Str.length()) && (IsOperator(ch))) {
throw new RuntimeException("FuncInv:parseBase:Please Check Equation Operators / Code:Should not reach Here:Unexpected: " + (char) ch + " int=" + (int) ch + " Cannot Format:" + str.substring(pos, str.length()));
} else if ((ch != -1) && (ch != 0) && (pos >= 1) && (pos < Str.length())) {
throw new RuntimeException("FuncInv:parseBase:Unexpected: " + (char) ch + " int=" + (int) ch + " Cannot Format:" + str.substring(pos, str.length()));
}
log.info("FuncInv:parseBase:Exception:Return Value:x.evalStr=" + x.evalStr());
return x;
}
}
}.parse();
}
public static void main(String... args){
Map<String, Double> variables = new HashMap<>();
String FuncF = "x^2+25";
FuncF = eatAll(FuncF, ' ');
FuncInvSep.FuncInv F;
variables.put(DiffWithRespTo, 1.0);
FuncInvSep MyObject=new FuncInvSep();
System.out.println("Hello World");
System.out.println("FuncF=" + FuncF );
F = MyObject.parseFInverse( FuncF, variables, DiffWithRespTo, "y","Bernstein");
System.out.println("Inverse String=" + F.evalStr() );
}
}