aQute.libg.glob.AntGlob Maven / Gradle / Ivy
package aQute.libg.glob;
import java.util.regex.Pattern;
public class AntGlob extends Glob {
public static final AntGlob ALL = new AntGlob("**");
public AntGlob(String globString) {
this(globString, 0);
}
public AntGlob(String globString, int flags) {
super(globString, toPattern(globString, flags));
}
// match forward slash or back slash (windows)
private static final String SLASHY = "[\\\\/]";
private static final String NOT_SLASHY = "[^\\\\/]";
public static Pattern toPattern(String line) {
return toPattern(line, 0);
}
public static Pattern toPattern(String line, int flags) {
line = line.trim();
int strLen = line.length();
StringBuilder sb = new StringBuilder(strLen << 2);
char previousChar = 0;
for (int i = 0; i < strLen; i++) {
char currentChar = line.charAt(i);
switch (currentChar) {
case '*' :
int j, k;
if ((i == 0 || isSlashy(previousChar)) && //
((j = i + 1) < strLen && line.charAt(j) == '*') && //
((k = j + 1) == strLen || isSlashy(line.charAt(k)))) {
if (i == 0 && k < strLen) { // line starts with "**/"
sb.append("(?:.*" + SLASHY + "|)");
i = k;
} else if (i > 1) { // after "x/"
sb.setLength(sb.length() - SLASHY.length());
sb.append("(?:" + SLASHY + ".*|)");
i = j;
} else {
sb.append(".*");
i = j;
}
} else {
sb.append(NOT_SLASHY + "*");
}
break;
case '?' :
sb.append(NOT_SLASHY);
break;
case '/' :
case '\\' :
if (i + 1 == strLen) {
// ending with "/" is shorthand for ending with "/**"
sb.append("(?:" + SLASHY + ".*|)");
} else {
sb.append(SLASHY);
}
break;
case '.' :
case '(' :
case ')' :
case '[' :
case ']' :
case '{' :
case '}' :
case '+' :
case '|' :
case '^' :
case '$' :
sb.append('\\');
// FALL THROUGH
default :
sb.append(currentChar);
break;
}
previousChar = currentChar;
}
return Pattern.compile(sb.toString(), flags);
}
private static boolean isSlashy(char c) {
return c == '/' || c == '\\';
}
}