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MercuryVersionComparator.java
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MercuryVersionComparator.java
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package org.codehaus.mojo.versions.ordering;
/*
* 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.StringTokenizer;
import org.apache.maven.artifact.versioning.ArtifactVersion;
import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
import org.codehaus.mojo.versions.api.Segment;
/**
* A comparator which uses Mercury's version rules.
*
* @author Stephen Connolly
* @since 1.0-alpha-3
* @deprecated
*/
public class MercuryVersionComparator extends AbstractVersionComparator {
private static final BigInteger BIG_INTEGER_ONE = new BigInteger("1");
/**
* {@inheritDoc}
*/
public int compare(ArtifactVersion o1, ArtifactVersion o2) {
return ComparableVersion.of(o1.toString()).compareTo(ComparableVersion.of(o2.toString()));
}
protected int innerGetSegmentCount(ArtifactVersion v) {
final String version = v.toString();
StringTokenizer tok = new StringTokenizer(version, ".-");
return tok.countTokens();
}
protected ArtifactVersion innerIncrementSegment(ArtifactVersion v, Segment segment) throws InvalidSegmentException {
final String version = v.toString();
StringBuilder result = new StringBuilder(version.length() + 10);
StringTokenizer tok = new StringTokenizer(version, ".-");
int index = 0;
while (tok.hasMoreTokens() && segment.value() > 0) {
String token = tok.nextToken();
result.append(token);
index += token.length();
if (tok.hasMoreTokens()) {
// grab the token separator
result.append(version.charAt(index));
index++;
}
segment = Segment.of(segment.value() - 1);
}
if (segment.value() == 0) {
if (tok.hasMoreTokens()) {
String token = tok.nextToken();
String newToken;
try {
BigInteger n = new BigInteger(token);
newToken = n.add(BIG_INTEGER_ONE).toString();
} catch (NumberFormatException e) {
// ok, let's try some common tricks
if ("alpha".equalsIgnoreCase(token)) {
newToken = "beta";
} else if ("beta".equalsIgnoreCase(token)) {
newToken = "milestone";
} else if ("milestone".equalsIgnoreCase(token)) {
newToken = "rc";
} else if ("rc".equalsIgnoreCase(token) || "cr".equalsIgnoreCase(token)) {
newToken = "ga";
} else if ("final".equalsIgnoreCase(token)
|| "ga".equalsIgnoreCase(token)
|| "".equalsIgnoreCase(token)) {
newToken = "sp";
} else {
newToken = VersionComparators.alphaNumIncrement(token);
}
}
result.append(newToken);
index += token.length();
if (tok.hasMoreTokens()) {
// grab the token separator
result.append(version.charAt(index));
index++;
}
} else {
// an empty part is equivalent to 0 for mercury version comparator
result.append("1");
}
}
while (tok.hasMoreTokens()) {
String token = tok.nextToken();
result.append("0");
index += token.length();
if (tok.hasMoreTokens()) {
// grab the token separator
result.append(version.charAt(index));
index++;
}
}
return new DefaultArtifactVersion(result.toString());
}
}