*/
import java.math.BigInteger;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Iterator;
-import java.util.List;
-import java.util.ListIterator;
-import java.util.Locale;
-import java.util.Properties;
-import java.util.Stack;
+import java.util.*;
/**
* Generic implementation of version comparison.
* @author <a href="mailto:hboutemy@apache.org">Hervé Boutemy</a>
*/
public class ComparableVersion implements Comparable<ComparableVersion> {
- private String value;
+ private String value;
- private String canonical;
+ private String canonical;
- private ListItem items;
+ private ListItem items;
- private interface Item {
- int INTEGER_ITEM = 0;
- int STRING_ITEM = 1;
- int LIST_ITEM = 2;
+ private interface Item {
+ int INTEGER_ITEM = 0;
+ int STRING_ITEM = 1;
+ int LIST_ITEM = 2;
- int compareTo(Item item);
+ int compareTo(Item item);
- int getType();
+ int getType();
- boolean isNull();
- }
+ boolean isNull();
+ }
- /**
- * Represents a numeric item in the version item list.
- */
- private static class IntegerItem implements Item {
+ /**
+ * Represents a numeric item in the version item list.
+ */
+ private static class IntegerItem implements Item {
+ private static final String INVALID_ITEM = "invalid item: ";
private static final BigInteger BIG_INTEGER_ZERO = new BigInteger("0");
-
- private final BigInteger value;
-
- public static final IntegerItem ZERO = new IntegerItem();
-
- private IntegerItem() {
- this.value = BIG_INTEGER_ZERO;
- }
-
- public IntegerItem(String str) {
- this.value = new BigInteger(str);
- }
-
- @Override
- public int getType() {
- return INTEGER_ITEM;
- }
-
- @Override
- public boolean isNull() {
- return BIG_INTEGER_ZERO.equals(value);
- }
-
- @Override
- public int compareTo(Item item) {
- if (item == null) {
- return BIG_INTEGER_ZERO.equals(value) ? 0 : 1; // 1.0 == 1, 1.1
- // > 1
- }
-
- switch (item.getType()) {
- case INTEGER_ITEM:
- return value.compareTo(((IntegerItem) item).value);
-
- case STRING_ITEM:
- return 1; // 1.1 > 1-sp
-
- case LIST_ITEM:
- return 1; // 1.1 > 1-1
-
- default:
- throw new RuntimeException("invalid item: " + item.getClass());
- }
- }
-
- @Override
- public String toString() {
- return value.toString();
- }
- }
-
- /**
- * Represents a string in the version item list, usually a qualifier.
- */
- private static class StringItem implements Item {
- private static final String[] QUALIFIERS = { "alpha", "beta", "milestone", "rc", "snapshot", "", "sp" };
-
- private static final List<String> _QUALIFIERS = Arrays.asList(QUALIFIERS);
-
- private static final Properties ALIASES = new Properties();
- static {
- ALIASES.put("ga", "");
- ALIASES.put("final", "");
- ALIASES.put("cr", "rc");
- }
-
- /**
- * A comparable value for the empty-string qualifier. This one is used
- * to determine if a given qualifier makes the version older than one
- * without a qualifier, or more recent.
- */
- private static final String RELEASE_VERSION_INDEX = String.valueOf(_QUALIFIERS.indexOf(""));
-
- private String value;
-
- public StringItem(String value, boolean followedByDigit) {
- if (followedByDigit && value.length() == 1) {
- // a1 = alpha-1, b1 = beta-1, m1 = milestone-1
- switch (value.charAt(0)) {
- case 'a':
- value = "alpha";
- break;
- case 'b':
- value = "beta";
- break;
- case 'm':
- value = "milestone";
- break;
- }
- }
- this.value = ALIASES.getProperty(value, value);
- }
-
- @Override
- public int getType() {
- return STRING_ITEM;
- }
-
- @Override
- public boolean isNull() {
- return (comparableQualifier(value).compareTo(RELEASE_VERSION_INDEX) == 0);
- }
-
- /**
- * Returns a comparable value for a qualifier.
- *
- * This method takes into account the ordering of known qualifiers then
- * unknown qualifiers with lexical ordering.
- *
- * just returning an Integer with the index here is faster, but requires
- * a lot of if/then/else to check for -1 or QUALIFIERS.size and then
- * resort to lexical ordering. Most comparisons are decided by the first
- * character, so this is still fast. If more characters are needed then
- * it requires a lexical sort anyway.
- *
- * @param qualifier
- * @return an equivalent value that can be used with lexical comparison
- */
- public static String comparableQualifier(String qualifier) {
- int i = _QUALIFIERS.indexOf(qualifier);
-
- return i == -1 ? (_QUALIFIERS.size() + "-" + qualifier) : String.valueOf(i);
- }
-
- // @Override
- public int compareTo(Item item) {
- if (item == null) {
- // 1-rc < 1, 1-ga > 1
- return comparableQualifier(value).compareTo(RELEASE_VERSION_INDEX);
- }
- switch (item.getType()) {
- case INTEGER_ITEM:
- return -1; // 1.any < 1.1 ?
-
- case STRING_ITEM:
- return comparableQualifier(value).compareTo(comparableQualifier(((StringItem) item).value));
-
- case LIST_ITEM:
- return -1; // 1.any < 1-1
-
- default:
- throw new RuntimeException("invalid item: " + item.getClass());
- }
- }
-
- @Override
- public String toString() {
- return value;
- }
- }
-
- /**
- * Represents a version list item. This class is used both for the global
- * item list and for sub-lists (which start with '-(number)' in the version
- * specification).
- */
- private static class ListItem extends ArrayList<Item> implements Item {
-
- private static final long serialVersionUID = -4740226741001149657L;
-
- @Override
- public int getType() {
- return LIST_ITEM;
- }
-
- @Override
- public boolean isNull() {
- return (size() == 0);
- }
-
- void normalize() {
- for (ListIterator<Item> iterator = listIterator(size()); iterator.hasPrevious();) {
- Item item = iterator.previous();
- if (item.isNull()) {
- iterator.remove(); // remove null trailing items: 0, "",
- // empty list
- } else {
- break;
- }
- }
- }
-
- @Override
- public int compareTo(Item item) {
- if (item == null) {
- if (size() == 0) {
- return 0; // 1-0 = 1- (normalize) = 1
- }
- Item first = get(0);
- return first.compareTo(null);
- }
- switch (item.getType()) {
- case INTEGER_ITEM:
- return -1; // 1-1 < 1.0.x
-
- case STRING_ITEM:
- return 1; // 1-1 > 1-sp
-
- case LIST_ITEM:
- Iterator<Item> left = iterator();
- Iterator<Item> right = ((ListItem) item).iterator();
-
- while (left.hasNext() || right.hasNext()) {
- Item l = left.hasNext() ? left.next() : null;
- Item r = right.hasNext() ? right.next() : null;
-
- int result = 0;
- if (r != null && l != null) {
- result = l.compareTo(r);
- } else if (r == null && l == null) {
- result = 0;
- } else if (l == null) {
- result = -1;
- } else {
- result = 1;
- }
-
- // if this is shorter, then invert the compare and mul with
- // -1
- // int result = (l == null ? (r == null ? 0 : -1 *
- // r.compareTo(l)) : l.compareTo(r));
-
- if (result != 0) {
- return result;
- }
- }
-
- return 0;
-
- default:
- throw new RuntimeException("invalid item: " + item.getClass());
- }
- }
-
- @Override
- public String toString() {
- StringBuilder buffer = new StringBuilder("(");
- for (Iterator<Item> iter = iterator(); iter.hasNext();) {
- buffer.append(iter.next());
- if (iter.hasNext()) {
- buffer.append(',');
- }
- }
- buffer.append(')');
- return buffer.toString();
- }
- }
-
- public ComparableVersion(String version) {
- parseVersion(version);
- }
-
- public final void parseVersion(String version) {
- this.value = version;
-
- items = new ListItem();
-
- version = version.toLowerCase(Locale.ENGLISH);
-
- ListItem list = items;
-
- Stack<Item> stack = new Stack<Item>();
- stack.push(list);
-
- boolean isDigit = false;
-
- int startIndex = 0;
-
- for (int i = 0; i < version.length(); i++) {
- char c = version.charAt(i);
-
- if (c == '.') {
- if (i == startIndex) {
- list.add(IntegerItem.ZERO);
- } else {
- list.add(parseItem(isDigit, version.substring(startIndex, i)));
- }
- startIndex = i + 1;
- } else if (c == '-') {
- if (i == startIndex) {
- list.add(IntegerItem.ZERO);
- } else {
- list.add(parseItem(isDigit, version.substring(startIndex, i)));
- }
- startIndex = i + 1;
-
- if (isDigit) {
- list.normalize(); // 1.0-* = 1-*
-
- if ((i + 1 < version.length()) && Character.isDigit(version.charAt(i + 1))) {
- // new ListItem only if previous were digits and new
- // char is a digit,
- // ie need to differentiate only 1.1 from 1-1
- list.add(list = new ListItem());
-
- stack.push(list);
- }
- }
- } else if (Character.isDigit(c)) {
- if (!isDigit && i > startIndex) {
- list.add(new StringItem(version.substring(startIndex, i), true));
- startIndex = i;
- }
-
- isDigit = true;
- } else {
- if (isDigit && i > startIndex) {
- list.add(parseItem(true, version.substring(startIndex, i)));
- startIndex = i;
- }
-
- isDigit = false;
- }
- }
-
- if (version.length() > startIndex) {
- list.add(parseItem(isDigit, version.substring(startIndex)));
- }
-
- while (!stack.isEmpty()) {
- list = (ListItem) stack.pop();
- list.normalize();
- }
-
- canonical = items.toString();
- }
-
- private static Item parseItem(boolean isDigit, String buf) {
- return isDigit ? new IntegerItem(buf) : new StringItem(buf, false);
- }
-
- @Override
- public int compareTo(ComparableVersion o) {
- return items.compareTo(o.items);
- }
-
- @Override
- public String toString() {
- return value;
- }
-
- @Override
- public boolean equals(Object o) {
- return (o instanceof ComparableVersion) && canonical.equals(((ComparableVersion) o).canonical);
- }
-
- @Override
- public int hashCode() {
- return canonical.hashCode();
- }
+ private final BigInteger value;
+ public static final IntegerItem ZERO = new IntegerItem();
+
+ private IntegerItem() {
+ this.value = BIG_INTEGER_ZERO;
+ }
+
+ public IntegerItem(String str) {
+ this.value = new BigInteger(str);
+ }
+
+ @Override
+ public int getType() {
+ return INTEGER_ITEM;
+ }
+
+ @Override
+ public boolean isNull() {
+ return BIG_INTEGER_ZERO.equals(value);
+ }
+
+ @Override
+ public int compareTo(Item item) {
+ if (item == null) {
+ return BIG_INTEGER_ZERO.equals(value) ? 0 : 1; // 1.0 == 1, 1.1
+ // > 1
+ }
+
+ switch (item.getType()) {
+ case INTEGER_ITEM:
+ return value.compareTo(((IntegerItem) item).value);
+
+ case STRING_ITEM:
+ return 1; // 1.1 > 1-sp
+
+ case LIST_ITEM:
+ return 1; // 1.1 > 1-1
+
+ default:
+ throw new RuntimeException(INVALID_ITEM + item.getClass());
+ }
+ }
+
+ @Override
+ public String toString() {
+ return value.toString();
+ }
+ }
+
+ /**
+ * Represents a string in the version item list, usually a qualifier.
+ */
+ private static class StringItem implements Item {
+ private static final String[] QUALIFIERS = { "alpha", "beta", "milestone", "rc", "snapshot", "", "sp" };
+
+ private static final List<String> _QUALIFIERS = Arrays.asList(QUALIFIERS);
+
+ private static final Properties ALIASES = new Properties();
+ static {
+ ALIASES.put("ga", "");
+ ALIASES.put("final", "");
+ ALIASES.put("cr", "rc");
+ }
+
+ /**
+ * A comparable value for the empty-string qualifier. This one is used
+ * to determine if a given qualifier makes the version older than one
+ * without a qualifier, or more recent.
+ */
+ private static final String RELEASE_VERSION_INDEX = String.valueOf(_QUALIFIERS.indexOf(""));
+
+ private String value;
+
+ public StringItem(String value, boolean followedByDigit) {
+ if (followedByDigit && value.length() == 1) {
+ // a1 = alpha-1, b1 = beta-1, m1 = milestone-1
+ switch (value.charAt(0)) {
+ case 'a':
+ value = "alpha";
+ break;
+ case 'b':
+ value = "beta";
+ break;
+ case 'm':
+ value = "milestone";
+ break;
+ }
+ }
+ this.value = ALIASES.getProperty(value, value);
+ }
+
+ @Override
+ public int getType() {
+ return STRING_ITEM;
+ }
+
+ @Override
+ public boolean isNull() {
+ return (comparableQualifier(value).compareTo(RELEASE_VERSION_INDEX) == 0);
+ }
+
+ /**
+ * Returns a comparable value for a qualifier.
+ *
+ * This method takes into account the ordering of known qualifiers then
+ * unknown qualifiers with lexical ordering.
+ *
+ * just returning an Integer with the index here is faster, but requires
+ * a lot of if/then/else to check for -1 or QUALIFIERS.size and then
+ * resort to lexical ordering. Most comparisons are decided by the first
+ * character, so this is still fast. If more characters are needed then
+ * it requires a lexical sort anyway.
+ *
+ * @param qualifier
+ * @return an equivalent value that can be used with lexical comparison
+ */
+ public static String comparableQualifier(String qualifier) {
+ int i = _QUALIFIERS.indexOf(qualifier);
+
+ return i == -1 ? (_QUALIFIERS.size() + "-" + qualifier) : String.valueOf(i);
+ }
+
+ // @Override
+ public int compareTo(Item item) {
+ if (item == null) {
+ // 1-rc < 1, 1-ga > 1
+ return comparableQualifier(value).compareTo(RELEASE_VERSION_INDEX);
+ }
+ switch (item.getType()) {
+ case INTEGER_ITEM:
+ return -1; // 1.any < 1.1 ?
+
+ case STRING_ITEM:
+ return comparableQualifier(value).compareTo(comparableQualifier(((StringItem) item).value));
+
+ case LIST_ITEM:
+ return -1; // 1.any < 1-1
+
+ default:
+ throw new RuntimeException("invalid item: " + item.getClass());
+ }
+ }
+
+ @Override
+ public String toString() {
+ return value;
+ }
+ }
+
+ /**
+ * Represents a version list item. This class is used both for the global
+ * item list and for sub-lists (which start with '-(number)' in the version
+ * specification).
+ */
+ private static class ListItem extends ArrayList<Item> implements Item {
+
+ @Override
+ public int getType() {
+ return LIST_ITEM;
+ }
+
+ @Override
+ public boolean isNull() {
+ return (size() == 0);
+ }
+
+ void normalize() {
+ for (ListIterator<Item> iterator = listIterator(size()); iterator.hasPrevious();) {
+ Item item = iterator.previous();
+ if (item.isNull()) {
+ iterator.remove(); // remove null trailing items: 0, "",
+ // empty list
+ } else {
+ break;
+ }
+ }
+ }
+
+ @Override
+ public int compareTo(Item item) {
+ if (item == null) {
+ if (size() == 0) {
+ return 0; // 1-0 = 1- (normalize) = 1
+ }
+ Item first = get(0);
+ return first.compareTo(null);
+ }
+ switch (item.getType()) {
+ case INTEGER_ITEM:
+ return -1; // 1-1 < 1.0.x
+
+ case STRING_ITEM:
+ return 1; // 1-1 > 1-sp
+
+ case LIST_ITEM:
+ Iterator<Item> left = iterator();
+ Iterator<Item> right = ((ListItem) item).iterator();
+
+ while (left.hasNext() || right.hasNext()) {
+ Item l = left.hasNext() ? left.next() : null;
+ Item r = right.hasNext() ? right.next() : null;
+
+ int result = 0;
+ if (r != null && l != null) {
+ result = l.compareTo(r);
+ } else if (r == null && l == null) {
+ result = 0;
+ } else if (l == null) {
+ result = -1;
+ } else {
+ result = 1;
+ }
+
+ // if this is shorter, then invert the compare and mul with
+ // -1
+ // int result = (l == null ? (r == null ? 0 : -1 *
+ // r.compareTo(l)) : l.compareTo(r));
+
+ if (result != 0) {
+ return result;
+ }
+ }
+
+ return 0;
+
+ default:
+ throw new RuntimeException("invalid item: " + item.getClass());
+ }
+ }
+
+ @Override
+ public String toString() {
+ StringBuilder buffer = new StringBuilder("(");
+ for (Iterator<Item> iter = iterator(); iter.hasNext();) {
+ buffer.append(iter.next());
+ if (iter.hasNext()) {
+ buffer.append(',');
+ }
+ }
+ buffer.append(')');
+ return buffer.toString();
+ }
+ }
+
+ public ComparableVersion(String version) {
+ parseVersion(version);
+ }
+
+ public final void parseVersion(String version) {
+ this.value = version;
+
+ items = new ListItem();
+
+ version = version.toLowerCase(Locale.ENGLISH);
+
+ ListItem list = items;
+
+ Stack<Item> stack = new Stack<>();
+ stack.push(list);
+
+ boolean isDigit = false;
+
+ int startIndex = 0;
+
+ for (int i = 0; i < version.length(); i++) {
+ char c = version.charAt(i);
+
+ if (c == '.') {
+ if (i == startIndex) {
+ list.add(IntegerItem.ZERO);
+ } else {
+ list.add(parseItem(isDigit, version.substring(startIndex, i)));
+ }
+ startIndex = i + 1;
+ } else if (c == '-') {
+ if (i == startIndex) {
+ list.add(IntegerItem.ZERO);
+ } else {
+ list.add(parseItem(isDigit, version.substring(startIndex, i)));
+ }
+ startIndex = i + 1;
+
+ if (isDigit) {
+ list.normalize(); // 1.0-* = 1-*
+
+ if ((i + 1 < version.length()) && Character.isDigit(version.charAt(i + 1))) {
+ // new ListItem only if previous were digits and new
+ // char is a digit,
+ // ie need to differentiate only 1.1 from 1-1
+ list.add(list = new ListItem());
+
+ stack.push(list);
+ }
+ }
+ } else if (Character.isDigit(c)) {
+ if (!isDigit && i > startIndex) {
+ list.add(new StringItem(version.substring(startIndex, i), true));
+ startIndex = i;
+ }
+
+ isDigit = true;
+ } else {
+ if (isDigit && i > startIndex) {
+ list.add(parseItem(true, version.substring(startIndex, i)));
+ startIndex = i;
+ }
+
+ isDigit = false;
+ }
+ }
+
+ if (version.length() > startIndex) {
+ list.add(parseItem(isDigit, version.substring(startIndex)));
+ }
+
+ while (!stack.isEmpty()) {
+ list = (ListItem) stack.pop();
+ list.normalize();
+ }
+
+ canonical = items.toString();
+ }
+
+ private static Item parseItem(boolean isDigit, String buf) {
+ return isDigit ? new IntegerItem(buf) : new StringItem(buf, false);
+ }
+
+ @Override
+ public int compareTo(ComparableVersion o) {
+ return items.compareTo(o.items);
+ }
+
+ @Override
+ public String toString() {
+ return value;
+ }
+
+ @Override
+ public boolean equals(Object o) {
+ return (o instanceof ComparableVersion) && canonical.equals(((ComparableVersion) o).canonical);
+ }
+
+ @Override
+ public int hashCode() {
+ return canonical.hashCode();
+ }
}
Code Review / sdc.git / blobdiff