[jenkins] 06/22: jenkins-version-number
James Downing Page
jamespage at alioth.debian.org
Tue Aug 13 11:47:01 UTC 2013
This is an automated email from the git hooks/post-receive script.
jamespage pushed a commit to branch patch-queue/master
in repository jenkins.
commit e85e3fff1d314b603bde97975494f144b651a3a7
Author: Debian Java Maintainers <pkg-java-maintainers at lists.alioth.debian.org>
Date: Sun Aug 11 10:41:38 2013 +0100
jenkins-version-number
Gbp-Pq-Topic: build
---
core/src/main/java/hudson/util/VersionNumber.java | 486 +++++++++++++++++++++
1 file changed, 486 insertions(+)
diff --git a/core/src/main/java/hudson/util/VersionNumber.java b/core/src/main/java/hudson/util/VersionNumber.java
new file mode 100644
index 0000000..afa8688
--- /dev/null
+++ b/core/src/main/java/hudson/util/VersionNumber.java
@@ -0,0 +1,486 @@
+package hudson.util;
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import java.math.BigInteger;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.Iterator;
+import java.util.List;
+import java.util.ListIterator;
+import java.util.Locale;
+import java.util.Properties;
+import java.util.Stack;
+
+/**
+ * Immutable representation of a version number based on the Mercury version numbering scheme.
+ *
+ * {@link VersionNumber}s are {@link Comparable}.
+ *
+ * <h2>Special tokens</h2>
+ * <p>
+ * We allow a component to be not just a number, but also "ea", "ea1", "ea2".
+ * "ea" is treated as "ea0", and eaN < M for any M > 0.
+ *
+ * <p>
+ * '*' is also allowed as a component, and '*' > M for any M > 0.
+ *
+ * <p>
+ * 'SNAPSHOT' is also allowed as a component, and "N.SNAPSHOT" is interpreted as "N-1.*"
+ *
+ * <pre>
+ * 2.0.* > 2.0.1 > 2.0.1-SNAPSHOT > 2.0.0.99 > 2.0.0 > 2.0.ea > 2.0
+ * </pre>
+ *
+ * This class is re-implemented in 1.415. The class was originally introduced in 1.139
+ *
+ * @since 1.139
+ * @author Stephen Connolly (stephenc at apache.org)
+ * @author Kenney Westerhof (kenney at apache.org)
+ * @author Hervé Boutemy (hboutemy at apache.org)
+ */
+public class VersionNumber implements Comparable<VersionNumber> {
+ private String value;
+
+ private String canonical;
+
+ private ListItem items;
+
+ private interface Item {
+ public static final int INTEGER_ITEM = 0;
+
+ public static final int STRING_ITEM = 1;
+
+ public static final int LIST_ITEM = 2;
+
+ public static final int WILDCARD_ITEM = 3;
+
+ public int compareTo(Item item);
+
+ public int getType();
+
+ public boolean isNull();
+ }
+
+ /**
+ * Represents a wild-card item in the version item list.
+ */
+ private static class WildCardItem implements Item {
+
+ public int compareTo(Item item) {
+ if (item==null) // 1.* ( > 1.99) > 1
+ return 1;
+ switch (item.getType()) {
+ case INTEGER_ITEM:
+ case LIST_ITEM:
+ case STRING_ITEM:
+ return 1;
+ case WILDCARD_ITEM:
+ return 0;
+ default:
+ return 1;
+ }
+ }
+
+ public int getType() {
+ return WILDCARD_ITEM;
+ }
+
+ public boolean isNull() {
+ return false;
+ }
+
+ @Override
+ public String toString() {
+ return "*";
+ }
+ }
+
+ /**
+ * Represents a numeric item in the version item list.
+ */
+ private static class IntegerItem
+ implements Item {
+ private static final BigInteger BigInteger_ZERO = new BigInteger("0");
+
+ private final BigInteger value;
+
+ public static final IntegerItem ZERO = new IntegerItem();
+
+ private IntegerItem() {
+ this.value = BigInteger_ZERO;
+ }
+
+ public IntegerItem(String str) {
+ this.value = new BigInteger(str);
+ }
+
+ public int getType() {
+ return INTEGER_ITEM;
+ }
+
+ public boolean isNull() {
+ return BigInteger_ZERO.equals(value);
+ }
+
+ public int compareTo(Item item) {
+ if (item == null) {
+ return BigInteger_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
+
+ case WILDCARD_ITEM:
+ return 0;
+
+ default:
+ throw new RuntimeException("invalid item: " + item.getClass());
+ }
+ }
+
+ public String toString() {
+ return value.toString();
+ }
+ }
+
+ /**
+ * Represents a string in the version item list, usually a qualifier.
+ */
+ private static class StringItem implements Item {
+ private final static String[] QUALIFIERS = {"snapshot", "alpha", "beta", "milestone", "rc", "", "sp"};
+
+ private final static List<String> _QUALIFIERS = Arrays.asList(QUALIFIERS);
+
+ private final static Properties ALIASES = new Properties();
+
+ static {
+ ALIASES.put("ga", "");
+ ALIASES.put("final", "");
+ ALIASES.put("cr", "rc");
+ ALIASES.put("ea", "rc");
+ }
+
+ /**
+ * A comparable 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 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);
+ }
+
+ public int getType() {
+ return STRING_ITEM;
+ }
+
+ public boolean isNull() {
+ return (comparableQualifier(value).compareTo(RELEASE_VERSION_INDEX) == 0);
+ }
+
+ /**
+ * Returns a comparable for a qualifier.
+ * <p/>
+ * This method both takes into account the ordering of known qualifiers as well as lexical ordering for unknown
+ * qualifiers.
+ * <p/>
+ * 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
+ */
+ public static String comparableQualifier(String qualifier) {
+ int i = _QUALIFIERS.indexOf(qualifier);
+
+ return i == -1 ? _QUALIFIERS.size() + "-" + qualifier : String.valueOf(i);
+ }
+
+ 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
+
+ case WILDCARD_ITEM:
+ return -1;
+
+ default:
+ throw new RuntimeException("invalid item: " + item.getClass());
+ }
+ }
+
+ 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 {
+ public int getType() {
+ return LIST_ITEM;
+ }
+
+ public boolean isNull() {
+ return (size() == 0);
+ }
+
+ void normalize() {
+ for (ListIterator iterator = listIterator(size()); iterator.hasPrevious(); ) {
+ Item item = (Item) iterator.previous();
+ if (item.isNull()) {
+ iterator.remove(); // remove null trailing items: 0, "", empty list
+ } else {
+ break;
+ }
+ }
+ }
+
+ public int compareTo(Item item) {
+ if (item == null) {
+ if (size() == 0) {
+ return 0; // 1-0 = 1- (normalize) = 1
+ }
+ Item first = (Item) 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 left = iterator();
+ Iterator right = ((ListItem) item).iterator();
+
+ while (left.hasNext() || right.hasNext()) {
+ Item l = left.hasNext() ? (Item) left.next() : null;
+ Item r = right.hasNext() ? (Item) right.next() : null;
+
+ // if this is shorter, then invert the compare and mul with -1
+ int result = l == null ? -1 * r.compareTo(l) : l.compareTo(r);
+
+ if (result != 0) {
+ return result;
+ }
+ }
+
+ return 0;
+
+ case WILDCARD_ITEM:
+ return -1;
+
+ default:
+ throw new RuntimeException("invalid item: " + item.getClass());
+ }
+ }
+
+ 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 VersionNumber(String version) {
+ parseVersion(version);
+ }
+
+ private 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 (c == '*') {
+ list.add(new WildCardItem());
+ startIndex = i + 1;
+ } else if (Character.isDigit(c)) {
+ if (!isDigit && i > startIndex) {
+ list.add(new StringItem(version.substring(startIndex, i), true));
+ startIndex = i;
+ }
+
+ isDigit = true;
+ } else if (Character.isWhitespace(c)) {
+ if (i > startIndex) {
+ if (isDigit) {
+ list.add(parseItem(true, version.substring(startIndex, i)));
+ } else {
+ list.add(new StringItem(version.substring(startIndex, i), true));
+ }
+ startIndex = i;
+ }
+
+ isDigit = false;
+ } 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 ? (Item) new IntegerItem(buf) : (Item) new StringItem(buf, false);
+ }
+
+ public int compareTo(VersionNumber o) {
+ return items.compareTo(o.items);
+ }
+
+ public String toString() {
+ return value;
+ }
+
+ public boolean equals(Object o) {
+ return (o instanceof VersionNumber) && canonical.equals(((VersionNumber) o).canonical);
+ }
+
+ public int hashCode() {
+ return canonical.hashCode();
+ }
+
+ public boolean isOlderThan(VersionNumber rhs) {
+ return compareTo(rhs) < 0;
+ }
+
+ public boolean isNewerThan(VersionNumber rhs) {
+ return compareTo(rhs) > 0;
+ }
+
+ public int digit(int idx) {
+ Iterator i = items.iterator();
+ Item item = (Item) i.next();
+ while (idx > 0 && i.hasNext()) {
+ if (item instanceof IntegerItem) {
+ idx--;
+ }
+ i.next();
+ }
+ return ((IntegerItem) item).value.intValue();
+ }
+
+ public static final Comparator<VersionNumber> DESCENDING = new Comparator<VersionNumber>() {
+ public int compare(VersionNumber o1, VersionNumber o2) {
+ return o2.compareTo(o1);
+ }
+ };
+}
--
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