org.apache.maven.graph.common.version.VersionUtils Maven / Gradle / Ivy

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/*******************************************************************************
 * Copyright 2012 John Casey
 * 
 * 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.apache.maven.graph.common.version;

import org.apache.maven.graph.common.version.parse.ParseException;
import org.apache.maven.graph.common.version.parse.TokenMgrError;
import org.apache.maven.graph.common.version.parse.VersionParser;

public final class VersionUtils
{

    private VersionUtils()
    {
    }

    public static VersionSpec createFromSpec( final String version )
        throws InvalidVersionSpecificationException
    {
        checkEmpty( version );

        try
        {
            final VersionSpec spec = new VersionParser( version ).parse();
            if ( spec == null )
            {
                throw new InvalidVersionSpecificationException( version, "Parsed VersionSpec is null." );
            }

            return spec;
        }
        catch ( final ParseException e )
        {
            throw new InvalidVersionSpecificationException( version, "Failed to parse version: %s", e, e.getMessage() );
        }
        catch ( final TokenMgrError e )
        {
            throw new InvalidVersionSpecificationException( version, "Failed to parse version: %s", e, e.getMessage() );
        }
    }

    private static void checkEmpty( final String version )
        throws InvalidVersionSpecificationException
    {
        if ( version == null || version.trim()
                                       .length() < 1 )
        {
            throw new InvalidVersionSpecificationException( version, "Valid versions cannot be null or empty" );
        }

    }

    public static RangeVersionSpec createRange( final String version )
        throws InvalidVersionSpecificationException
    {
        checkEmpty( version );

        try
        {
            return new VersionParser( version ).range();
        }
        catch ( final ParseException e )
        {
            throw new InvalidVersionSpecificationException( version, "Failed to parse version range: %s", e,
                                                            e.getMessage() );
        }
    }

    public static SingleVersion createSingleVersion( final String version )
        throws InvalidVersionSpecificationException
    {
        checkEmpty( version );

        try
        {
            return new VersionParser( version ).single();
        }
        catch ( final ParseException e )
        {
            throw new InvalidVersionSpecificationException( version, "Failed to parse single version: %s", e,
                                                            e.getMessage() );
        }
    }

}