--- /dev/null
+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;
+ private String tag;
+ private int tagVersion;
+
+ /**
+ * 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, minor, patch, null, -1);
+ }
+
+ /**
+ * Create a new {@link Version} with the given values.
+ *
+ * @param major
+ * the major version
+ * @param minor
+ * the minor version
+ * @param patch
+ * the patch version
+ * @param tag
+ * a tag name for this version
+ */
+ public Version(int major, int minor, int patch, String tag) {
+ this(major, minor, patch, tag, -1);
+ }
+
+ /**
+ * Create a new {@link Version} with the given values.
+ *
+ * @param major
+ * the major version
+ * @param minor
+ * the minor version
+ * @param patch
+ * the patch version the patch version
+ * @param tag
+ * a tag name for this version
+ * @param tagVersion
+ * the version of the tagged version
+ */
+ public Version(int major, int minor, int patch, String tag, int tagVersion) {
+ if (tagVersion >= 0 && tag == null) {
+ throw new java.lang.IllegalArgumentException(
+ "A tag version cannot be used without a tag");
+ }
+
+ this.major = major;
+ this.minor = minor;
+ this.patch = patch;
+ this.tag = tag;
+ this.tagVersion = tagVersion;
+
+ this.version = generateVersion();
+ }
+
+ /**
+ * Create a new {@link Version} with the given value, which must be in the
+ * form <tt>MAJOR.MINOR.PATCH(-TAG(TAG_VERSION))</tt>.
+ *
+ * @param version
+ * the version (<tt>MAJOR.MINOR.PATCH</tt>,
+ * <tt>MAJOR.MINOR.PATCH-TAG</tt> or
+ * <tt>MAJOR.MINOR.PATCH-TAGVERSIONTAG</tt>)
+ */
+ public Version(String version) {
+ try {
+ String[] tab = version.split("\\.");
+ this.major = Integer.parseInt(tab[0].trim());
+ this.minor = Integer.parseInt(tab[1].trim());
+ if (tab[2].contains("-")) {
+ int posInVersion = version.indexOf('.');
+ posInVersion = version.indexOf('.', posInVersion + 1);
+ String rest = version.substring(posInVersion + 1);
+
+ int posInRest = rest.indexOf('-');
+ this.patch = Integer.parseInt(rest.substring(0, posInRest)
+ .trim());
+
+ posInVersion = version.indexOf('-');
+ this.tag = version.substring(posInVersion + 1).trim();
+ this.tagVersion = -1;
+
+ StringBuilder str = new StringBuilder();
+ while (!tag.isEmpty() && tag.charAt(tag.length() - 1) >= '0'
+ && tag.charAt(tag.length() - 1) <= '9') {
+ str.insert(0, tag.charAt(tag.length() - 1));
+ tag = tag.substring(0, tag.length() - 1);
+ }
+
+ if (str.length() > 0) {
+ this.tagVersion = Integer.parseInt(str.toString());
+ }
+ } else {
+ this.patch = Integer.parseInt(tab[2].trim());
+ this.tag = null;
+ this.tagVersion = -1;
+ }
+
+ this.version = generateVersion();
+ } catch (Exception e) {
+ this.major = 0;
+ this.minor = 0;
+ this.patch = 0;
+ this.tag = null;
+ this.tagVersion = -1;
+ 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;
+ }
+
+ /**
+ * A tag name for this version.
+ *
+ * @return the tag
+ */
+ public String getTag() {
+ return tag;
+ }
+
+ /**
+ * The version of the tag, or -1 for no version.
+ *
+ * @return the tag version
+ */
+ public int getTagVersion() {
+ return tagVersion;
+ }
+
+ /**
+ * Check if this {@link Version} is "empty" (i.e., the version was not
+ * parse-able or not given).
+ *
+ * @return TRUE if it is empty
+ */
+ public boolean isEmpty() {
+ return version == null;
+ }
+
+ /**
+ * Check if we are more recent than the given {@link Version}.
+ * <p>
+ * Note that a tagged version is considered newer than a non-tagged version,
+ * but two tagged versions with different tags are not comparable.
+ * <p>
+ * Also, an empty version is always considered older.
+ *
+ * @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 (isEmpty()) {
+ return false;
+ } else if (o.isEmpty()) {
+ return true;
+ }
+
+ 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;
+ }
+
+ // a tagged version is considered newer than a non-tagged one
+ if (major == o.major && minor == o.minor && patch == o.patch
+ && tag != null && o.tag == null) {
+ return true;
+ }
+
+ // 2 <> tagged versions are not comparable
+ boolean sameTag = (tag == null && o.tag == null)
+ || (tag != null && tag.equals(o.tag));
+ if (major == o.major && minor == o.minor && patch == o.patch && sameTag
+ && tagVersion > o.tagVersion) {
+ return true;
+ }
+
+ return false;
+ }
+
+ /**
+ * Check if we are older than the given {@link Version}.
+ * <p>
+ * Note that a tagged version is considered newer than a non-tagged version,
+ * but two tagged versions with different tags are not comparable.
+ * <p>
+ * Also, an empty version is always considered older.
+ *
+ * @param o
+ * the other {@link Version}
+ * @return TRUE if this {@link Version} is older than the given one
+ */
+ public boolean isOlderThan(Version o) {
+ if (o.isEmpty()) {
+ return false;
+ } else if (isEmpty()) {
+ return true;
+ }
+
+ // 2 <> tagged versions are not comparable
+ boolean sameTag = (tag == null && o.tag == null)
+ || (tag != null && tag.equals(o.tag));
+ if (major == o.major && minor == o.minor && patch == o.patch
+ && !sameTag) {
+ return false;
+ }
+
+ 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);
+ }
+
+ @Override
+ 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;
+ if (isEmpty()) {
+ return o.isEmpty();
+ }
+
+ boolean sameTag = (tag == null && o.tag == null)
+ || (tag != null && tag.equals(o.tag));
+ return o.major == major && o.minor == minor && o.patch == patch
+ && sameTag && o.tagVersion == tagVersion;
+ }
+
+ 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;
+ }
+
+ /**
+ * Generate the clean version {@link String} from the current values.
+ *
+ * @return the clean version string
+ */
+ private String generateVersion() {
+ String tagSuffix = "";
+ if (tag != null) {
+ tagSuffix = "-" + tag
+ + (tagVersion >= 0 ? Integer.toString(tagVersion) : "");
+ }
+
+ return String.format("%d.%d.%d%s", major, minor, patch, tagSuffix);
+ }
+}
git://git.nikiroo.be / fanfix.git / blobdiff