package org.codehaus.mojo.versions.change;

/*
 * 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.
 */

/**
 * Represents a change of an artifact's version.
 *
 * @author Stephen Connolly
 * @since 15-Sep-2010 14:48:10
 */
public final class VersionChange
{
    private final String groupId;

    private final String artifactId;

    private final String oldVersion;

    private final String newVersion;

    public VersionChange( String groupId, String artifactId, String oldVersion, String newVersion )
    {
        this.groupId = groupId;
        this.artifactId = artifactId;
        this.oldVersion = oldVersion;
        this.newVersion = newVersion;
    }

    public String getGroupId()
    {
        return groupId;
    }

    public String getArtifactId()
    {
        return artifactId;
    }

    public String getOldVersion()
    {
        return oldVersion;
    }

    public String getNewVersion()
    {
        return newVersion;
    }

    public boolean equals( Object o )
    {
        if ( this == o )
        {
            return true;
        }
        if ( o == null || getClass() != o.getClass() )
        {
            return false;
        }

        VersionChange versionChange = (VersionChange) o;

        if ( artifactId != null ? !artifactId.equals( versionChange.artifactId ) : versionChange.artifactId != null )
        {
            return false;
        }
        if ( groupId != null ? !groupId.equals( versionChange.groupId ) : versionChange.groupId != null )
        {
            return false;
        }
        if ( newVersion != null ? !newVersion.equals( versionChange.newVersion ) : versionChange.newVersion != null )
        {
            return false;
        }
        if ( oldVersion != null ? !oldVersion.equals( versionChange.oldVersion ) : versionChange.oldVersion != null )
        {
            return false;
        }

        return true;
    }

    public int hashCode()
    {
        int result = groupId != null ? groupId.hashCode() : 0;
        result = 31 * result + ( artifactId != null ? artifactId.hashCode() : 0 );
        result = 31 * result + ( oldVersion != null ? oldVersion.hashCode() : 0 );
        result = 31 * result + ( newVersion != null ? newVersion.hashCode() : 0 );
        return result;
    }

    public String toString()
    {
        return "VersionChange(" + groupId + ':' + artifactId + ":" + oldVersion + "-->" + newVersion + ')';
    }
}
