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package org.apache.maven.artifact.versioning;
/*
* 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.util.StringTokenizer;
import java.util.regex.Pattern;
import java.util.NoSuchElementException;
/**
* Default implementation of artifact versioning.
*
* @author <a href="mailto:brett@apache.org">Brett Porter</a>
*/
public class DefaultArtifactVersion
implements ArtifactVersion
{
private Integer majorVersion;
private Integer minorVersion;
private Integer incrementalVersion;
private Integer buildNumber;
private String qualifier;
private ComparableVersion comparable;
public DefaultArtifactVersion( String version )
{
parseVersion( version );
}
@Override
public int hashCode()
{
return 11 + comparable.hashCode();
}
@Override
public boolean equals( Object other )
{
if ( this == other )
{
return true;
}
if ( !( other instanceof ArtifactVersion ) )
{
return false;
}
return compareTo( (ArtifactVersion) other ) == 0;
}
public int compareTo( ArtifactVersion otherVersion )
{
if ( otherVersion instanceof DefaultArtifactVersion )
{
return this.comparable.compareTo( ( (DefaultArtifactVersion) otherVersion ).comparable );
}
else
{
return compareTo( new DefaultArtifactVersion( otherVersion.toString() ) );
}
}
public int getMajorVersion()
{
return majorVersion != null ? majorVersion : 0;
}
public int getMinorVersion()
{
return minorVersion != null ? minorVersion : 0;
}
public int getIncrementalVersion()
{
return incrementalVersion != null ? incrementalVersion : 0;
}
public int getBuildNumber()
{
return buildNumber != null ? buildNumber : 0;
}
public String getQualifier()
{
return qualifier;
}
public final void parseVersion( String version )
{
comparable = new ComparableVersion( version );
int index = version.indexOf( "-" );
String part1;
String part2 = null;
if ( index < 0 )
{
part1 = version;
}
else
{
part1 = version.substring( 0, index );
part2 = version.substring( index + 1 );
}
if ( part2 != null )
{
try
{
if ( ( part2.length() == 1 ) || !part2.startsWith( "0" ) )
{
buildNumber = Integer.valueOf( part2 );
}
else
{
qualifier = part2;
}
}
catch ( NumberFormatException e )
{
qualifier = part2;
}
}
if ( ( !part1.contains( "." ) ) && !part1.startsWith( "0" ) )
{
try
{
majorVersion = Integer.valueOf( part1 );
}
catch ( NumberFormatException e )
{
// qualifier is the whole version, including "-"
qualifier = version;
buildNumber = null;
}
}
else
{
boolean fallback = false;
StringTokenizer tok = new StringTokenizer( part1, "." );
try
{
majorVersion = getNextIntegerToken( tok );
if ( tok.hasMoreTokens() )
{
minorVersion = getNextIntegerToken( tok );
}
if ( tok.hasMoreTokens() )
{
incrementalVersion = getNextIntegerToken( tok );
}
if ( tok.hasMoreTokens() )
{
qualifier = tok.nextToken();
fallback = Pattern.compile( "\\d+" ).matcher( qualifier ).matches();
}
// string tokenzier won't detect these and ignores them
if ( part1.contains( ".." ) || part1.startsWith( "." ) || part1.endsWith( "." ) )
{
fallback = true;
}
}
catch ( NumberFormatException e )
{
fallback = true;
}
if ( fallback )
{
// qualifier is the whole version, including "-"
qualifier = version;
majorVersion = null;
minorVersion = null;
incrementalVersion = null;
buildNumber = null;
}
}
}
private static Integer getNextIntegerToken( StringTokenizer tok )
{
try
{
String s = tok.nextToken();
if ( ( s.length() > 1 ) && s.startsWith( "0" ) )
{
throw new NumberFormatException( "Number part has a leading 0: '" + s + "'" );
}
return Integer.valueOf( s );
}
catch ( NoSuchElementException e )
{
throw new NumberFormatException( "Number is invalid" );
}
}
@Override
public String toString()
{
return comparable.toString();
}
}
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