org.ops4j.pax.url.mvn.internal.StringVersionSegment Maven / Gradle / Ivy

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OPS4J Pax Url - mvn: protocol handler. Detailed information to be found at http://wiki.ops4j.org/confluence/x/CoA6.

There is a newer version: 1.3.7

/*
 * Copyright 2008 Alin Dreghiciu.
 *
 * Licensed  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.ops4j.pax.url.mvn.internal;

import org.ops4j.lang.NullArgumentException;

/**
 * A version segment backed up by a String.
 *
 * @author Alin Dreghiciu
 * @since 0.2.0, January 30, 2008
 */
class StringVersionSegment
    implements VersionSegment
{

    /**
     * Version segment.
     */
    private final String m_segment;

    /**
     * Creates a new string version segment.
     *
     * @param segment version segment. Cannot be null.
     */
    StringVersionSegment( final String segment )
    {
        NullArgumentException.validateNotNull( segment, "Segment" );

        m_segment = segment;
    }

    /**
     * @see Comparable#compareTo(Object)
     */
    public int compareTo( final VersionSegment versionSegment )
    {
        if( versionSegment == null )
        {
            return 1;
        }
        return m_segment.compareTo( ( (StringVersionSegment) versionSegment ).m_segment );
    }

    @Override
    public boolean equals( final Object o )
    {
        if( this == o )
        {
            return true;
        }
        if( !( o instanceof StringVersionSegment ) )
        {
            return false;
        }

        StringVersionSegment that = (StringVersionSegment) o;

        return m_segment.equals( that.m_segment );
    }

    @Override
    public int hashCode()
    {
        return m_segment.hashCode();
    }

    @Override
    public String toString()
    {
        return m_segment;
    }

}