Alachisoft.NCache.Common.Util.WildcardEnabledRegex Maven / Gradle / Ivy

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package Alachisoft.NCache.Common.Util;

import java.util.ArrayList;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class WildcardEnabledRegex {

    private final Pattern pattern;

    public WildcardEnabledRegex(String pattern) {
        this.pattern = Pattern.compile(ConvertWildCard(pattern));
    }

    public static String WildcardToRegex(String pattern) {
        return "^" + pattern.replace("\\*", ".*").replace("\\?", ".") + "$";
    }

    public static String ConvertWildCard(String pattern) {

        StringBuilder myPattern = new StringBuilder(pattern);
        String newPattern = pattern;
        boolean esSeq = false;
        boolean change = false;
        ArrayList esChar = new ArrayList();
        int pos, newPos = -1;
        if (pattern.contains("\\")) {
            for (int i = 0; i < pattern.length(); i++) {
                pos = myPattern.indexOf("\\", newPos + 1);
                if (pos > newPos) {
                    esChar.add(myPattern.charAt(pos + 1));
                    myPattern.deleteCharAt(pos + 1);
                    newPos = pos;
                }
                esSeq = true;
            }
            pattern = myPattern.toString();
        }
        if (pattern.contains("%")) {
            newPattern = pattern.replaceAll("%", ".*");
            change = true;
        }
        if (pattern.contains("_")) {
            if (!change) {
                newPattern = pattern.replaceAll("_", ".?");
            } else {
                newPattern = newPattern.replaceAll("_", ".?");

            }
        }
        if (esSeq) {
            newPos = -1;
            myPattern = new StringBuilder(newPattern);
            for (int i = 0; i < esChar.size(); i++) {
                int pos1 = myPattern.indexOf("\\", newPos + 1);
                if (pos1 > newPos) {
                    myPattern.insert(pos1 + 1, esChar.get(i).toString());
                    newPos = pos1;
                }
            }
            newPattern = myPattern.toString();
        }
        return newPattern;
    }

    public final boolean IsMatch(String text) {
        Matcher matcher = pattern.matcher(text);
        return matcher.find();
    }
}