-package be.nikiroo.utils;
-
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
-
-/**
- * This class describe a program {@link Version}.
- *
- * @author niki
- */
-public class Version implements Comparable<Version> {
- private String version;
- private int major;
- private int minor;
- private int patch;
-
- /**
- * Create a new, empty {@link Version}.
- *
- */
- public Version() {
- }
-
- /**
- * Create a new {@link Version} with the given values.
- *
- * @param major
- * the major version
- * @param minor
- * the minor version
- * @param patch
- * the patch version
- */
- public Version(int major, int minor, int patch) {
- this.major = major;
- this.minor = minor;
- this.patch = patch;
- this.version = String.format("%d.%d.%d", major, minor, patch);
- }
-
- /**
- * Create a new {@link Version} with the given value, which must be in the
- * form <tt>MAJOR.MINOR.PATCH</tt>.
- *
- * @param version
- * the version (<tt>MAJOR.MINOR.PATCH</tt>)
- */
- public Version(String version) {
- try {
- String[] tab = version.split("\\.");
- this.major = Integer.parseInt(tab[0]);
- this.minor = Integer.parseInt(tab[1]);
- this.patch = Integer.parseInt(tab[2]);
- this.version = version;
- } catch (Exception e) {
- this.major = 0;
- this.minor = 0;
- this.patch = 0;
- this.version = null;
- }
- }
-
- /**
- * The 'major' version.
- * <p>
- * This version should only change when API-incompatible changes are made to
- * the program.
- *
- * @return the major version
- */
- public int getMajor() {
- return major;
- }
-
- /**
- * The 'minor' version.
- * <p>
- * This version should only change when new, backwards-compatible
- * functionality has been added to the program.
- *
- * @return the minor version
- */
- public int getMinor() {
- return minor;
- }
-
- /**
- * The 'patch' version.
- * <p>
- * This version should change when backwards-compatible bugfixes have been
- * added to the program.
- *
- * @return the patch version
- */
- public int getPatch() {
- return patch;
- }
-
- /**
- * Check if this {@link Version} is "empty" (i.e., the version was not
- * parse-able or not given).
- * <p>
- * An empty {@link Version} is always <tt>0.0.0</tt>.
- *
- * @return TRUE if it is empty
- */
- public boolean isEmpty() {
- return major == 0 && minor == 0 && patch == 0;
- }
-
- /**
- * Check if we are more recent than the given {@link Version}.
- *
- * @param o
- * the other {@link Version}
- * @return TRUE if this {@link Version} is more recent than the given one
- */
- public boolean isNewerThan(Version o) {
- if (major > o.major) {
- return true;
- }
-
- if (major == o.major && minor > o.minor) {
- return true;
- }
-
- if (major == o.major && minor == o.minor && patch > o.patch) {
- return true;
- }
-
- return false;
- }
-
- /**
- * Check if we are older than the given {@link Version}.
- *
- * @param o
- * the other {@link Version}
- * @return TRUE if this {@link Version} is older than the given one
- */
- public boolean isOlderThan(Version o) {
- return !equals(o) && !isNewerThan(o);
- }
-
- /**
- * Return the version of the running program if it follows the VERSION
- * convention (i.e., if it has a file called VERSION containing the version
- * as a {@link String} in its binary root, and if this {@link String}
- * follows the Major/Minor/Patch convention).
- * <p>
- * If it does not, return an empty {@link Version} object.
- *
- * @return the {@link Version} of the program, or an empty {@link Version}
- * (does not return NULL)
- */
- public static Version getCurrentVersion() {
- String version = null;
-
- InputStream in = IOUtils.openResource("VERSION");
- if (in != null) {
- try {
- ByteArrayOutputStream ba = new ByteArrayOutputStream();
- IOUtils.write(in, ba);
- in.close();
-
- version = ba.toString("UTF-8").trim();
- } catch (IOException e) {
- }
- }
-
- return new Version(version);
- }
-
- public int compareTo(Version o) {
- if (equals(o)) {
- return 0;
- } else if (isNewerThan(o)) {
- return 1;
- } else {
- return -1;
- }
- }
-
- @Override
- public boolean equals(Object obj) {
- if (obj instanceof Version) {
- Version o = (Version) obj;
- return o.major == major && o.minor == minor && o.patch == patch;
- }
-
- return false;
- }
-
- @Override
- public int hashCode() {
- return version == null ? 0 : version.hashCode();
- }
-
- /**
- * Return a user-readable form of this {@link Version}.
- */
- @Override
- public String toString() {
- return version == null ? "[unknown]" : version;
- }
-}