mercury-1.0.0-alpha-2/mercury-artifact/src/main/java/org/apache/maven/mercury/artifact/version/VersionRangeFactory.java

/**
 *  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.
 */
package org.apache.maven.mercury.artifact.version;

import java.util.Collection;

import org.apache.maven.mercury.artifact.Artifact;
import org.apache.maven.mercury.artifact.QualityRange;

/**
 * lack of IoC container makes me throw this class in.
 *
 * @author Oleg Gusakov
 * @version $Id$
 *
 */
public class VersionRangeFactory
{
  
  public static VersionRange create( final String version )
  throws VersionException
  {
    return new MavenVersionRange( version );
  }
  
  public static VersionRange create( final String version, final QualityRange qRange )
  throws VersionException
  {
    return new MavenVersionRange( version, qRange );
  }
  //--------------------------------------------------------------------------------------------
  /**
   * helpful latest version calculator
   * 
   * @param versions
   * @param noSnapshots
   * @return
   */
  public static final String findLatest( final Collection<String> versions, final boolean noSnapshots )
  {
    DefaultArtifactVersion tempDav = null;
    DefaultArtifactVersion tempDav2 = null;
    String version = null;

    // find latest
    for( String vn : versions )
    {
      // RELEASE?
      if( noSnapshots && vn.endsWith( Artifact.SNAPSHOT_VERSION ))
        continue;
      
      if( version == null )
      {
        version = vn;
        tempDav = new DefaultArtifactVersion( vn );
        continue;
      }
      
      tempDav2 = new DefaultArtifactVersion( vn );
      if( tempDav2.compareTo( tempDav ) > 0 )
      {
        version = vn;
        tempDav = tempDav2;
      }
    }
    return version;
  }

}