org.codehaus.mojo.versions.ordering.AbstractVersionComparator Maven / Gradle / Ivy
package org.codehaus.mojo.versions.ordering;
import org.apache.maven.artifact.versioning.ArtifactVersion;
/**
* Base class for version comparators.
*
* @since 1.0-beta-1
*/
public abstract class AbstractVersionComparator
implements VersionComparator
{
/**
* {@inheritDoc}
*/
public abstract int compare( ArtifactVersion o1, ArtifactVersion o2 );
/**
* {@inheritDoc}
*/
public final int getSegmentCount( ArtifactVersion v )
{
if ( v == null )
{
return 0;
}
if ( VersionComparators.isSnapshot( v ) )
{
return innerGetSegmentCount( VersionComparators.stripSnapshot( v ) );
}
return innerGetSegmentCount( v );
}
protected abstract int innerGetSegmentCount( ArtifactVersion v );
/**
* {@inheritDoc}
*/
public final ArtifactVersion incrementSegment( ArtifactVersion v, int segment )
{
if ( VersionComparators.isSnapshot( v ) )
{
return VersionComparators.copySnapshot( v, innerIncrementSegment( VersionComparators.stripSnapshot( v ),
segment ) );
}
return innerIncrementSegment( v, segment );
}
protected abstract ArtifactVersion innerIncrementSegment( ArtifactVersion v, int segment );
/**
* Returns a hash code value for the comparator class.
*
* @return the hash code.
*/
public int hashCode()
{
return getClass().hashCode();
}
/**
* Returns true if this object is the same type of comparator as the parameter.
*
* @param obj the reference object with which to compare.
* @return true if this object is the same as the obj
* argument; false otherwise.
* @see #hashCode()
* @see java.util.Hashtable
*/
public boolean equals( Object obj )
{
return obj == this || ( obj != null && getClass().equals( obj.getClass() ) );
}
}