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package bjc.utils.parserutils;
import static bjc.utils.PropertyDB.applyFormat;
import static bjc.utils.PropertyDB.getRegex;
import java.util.regex.Pattern;
/*
* Checks if a string would pass Double.parseDouble.
*
* Uses a regex from the javadoc for Double.valueOf()
*/
class DoubleMatcher {
/*
* Unit pieces.
*/
private static final String rDecDigits = getRegex("fpDigits");
private static final String rHexDigits = getRegex("fpHexDigits");
private static final String rExponent = applyFormat("fpExponent", getRegex("fpExponent"), rDecDigits);
/*
* Decimal floating point numbers.
*/
private static final String rSimpleDec = applyFormat("fpDecimalDecimal", rDecDigits, rExponent);
private static final String rSimpleIntDec = applyFormat("fpDecimalInteger", rDecDigits, rExponent);
/*
* Hex floating point numbers.
*/
private static final String rHexInt = applyFormat("fpHexInteger", rHexDigits);
private static final String rHexDec = applyFormat("fpHexDecimal", rHexDigits);
private static final String rHexLead = applyFormat("fpHexLeader", rHexInt, rHexDec);
private static final String rHexString = applyFormat("fpHexString", rHexLead, rDecDigits);
/*
* Floating point components.
*/
private static final String rFPLeader = getRegex("fpLeader");
private static final String rFPNum = applyFormat("fpNumber", rSimpleIntDec, rSimpleDec, rHexString);
/*
* Full double.
*/
private static final String rDouble = applyFormat("fpDouble", rFPLeader, rFPNum);
public static final Pattern doubleLiteral = Pattern.compile("\\A" + rDouble + "\\Z");
}
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