com.mgnt.utils.textutils.Version Maven / Gradle / Ivy
package com.mgnt.utils.textutils;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* @author Michael Gantman
*/
public class Version implements Comparable {
private static final String SEPARATOR = ".";
private static final String SPLIT_SEPARATOR = "\\.";
private static final VersionComparator COMPARATOR = new VersionComparator();
private List versionNumbers = new ArrayList<>();
public Version(String verStr) throws InvalidVersionFormatException {
if (verStr == null || "".equals(verStr)) {
throw new InvalidVersionFormatException("Null or empty string may not represent a valid vrsion");
}
for (String numStr : verStr.trim().split(SPLIT_SEPARATOR, Integer.MAX_VALUE)) {
try {
Integer num = Integer.parseInt(numStr);
if (num < 0) {
throw new InvalidVersionFormatException("Version may not contain a negative number");
}
versionNumbers.add(num);
} catch (NumberFormatException nfe) {
throw new InvalidVersionFormatException("Version must contain valid numeric values separated by '" + SEPARATOR + "'", nfe);
}
}
if (versionNumbers.isEmpty()) {
/*
* This is not expected to ever occur, but just in case...
*/
throw new InvalidVersionFormatException("Blank version error");
}
}
public List getVersionNumbers() {
return Collections.unmodifiableList(versionNumbers);
}
@Override
public int compareTo(Version otherVersion) {
if (otherVersion == null) {
throw new NullPointerException("Version passed for comparison is null");
}
return COMPARATOR.compare(this, otherVersion);
}
@Override
public String toString() {
StringBuilder ver = new StringBuilder();
for (Integer i : versionNumbers) {
ver.append(i).append(SEPARATOR);
}
ver.deleteCharAt(ver.length() - 1);
return ver.toString();
}
@Override
public int hashCode() {
return versionNumbers.hashCode();
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
Version other = (Version) obj;
return versionNumbers.equals(other.versionNumbers);
}
}