com.pdd.pop.ext.glassfish.grizzly.PortRange Maven / Gradle / Ivy
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package com.pdd.pop.ext.glassfish.grizzly;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Immutable class representing a port range.
* @author Gerd Behrmann
* @author Tigran Mkrtchyan
*/
public class PortRange {
/** Pattern matching [:] */
private final static Pattern FORMAT =
Pattern.compile("(\\d+)(?:(?:,|:)(\\d+))?");
private final int lower;
private final int upper;
/**
* Creates a port range with the given bounds (both inclusive).
*
* @throws IllegalArgumentException is either bound is not between
* 1 and 65535, or if high is lower than
* low.
*/
public PortRange(final int low, final int high) {
if (low < 1 || high < low || 65535 < high) {
throw new IllegalArgumentException("Invalid range");
}
lower = low;
upper = high;
}
/**
* Creates a port range containing a single port.
*/
public PortRange(final int port) {
this(port, port);
}
/**
* Parse a port range. A port range consists of either a single
* integer, or two integers separated by either a comma or a
* colon.
*
* The bounds must be between 1 and 65535, both inclusive.
*
* @return The port range represented by s.
*/
public static PortRange valueOf(String s)
throws IllegalArgumentException {
Matcher m = FORMAT.matcher(s);
if (!m.matches()) {
throw new IllegalArgumentException("Invalid string format: " + s);
}
int low;
int high;
try {
low = Integer.parseInt(m.group(1));
high = (m.groupCount() == 1) ? low : Integer.parseInt(m.group(2));
} catch (NumberFormatException e) {
throw new IllegalArgumentException("Invalid string format: " + s);
}
return new PortRange(low, high);
}
public int getLower() {
return lower;
}
public int getUpper() {
return upper;
}
@Override
public String toString() {
return String.format("%d:%d", lower, upper);
}
}