org.apache.maven.mercury.artifact.version.AttributeQuery Maven / Gradle / Ivy

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/**
 *  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;

/**
 * @author Oleg Gusakov
 * @version $Id: AttributeQuery.java 744245 2009-02-13 21:23:44Z hboutemy $
 */
public class AttributeQuery
{
    public static final char EXRP_START = '{';

    public static final char EXRP_STOP = '}';

    private String expr;

    public AttributeQuery( String query )
    {
        if ( query == null || query.indexOf( EXRP_START ) == -1 )
        {
            return;
        }
        int from = query.indexOf( EXRP_START );
        int to = query.indexOf( EXRP_STOP );
    }

    public static String stripExpression( String query )
    {
        if ( query == null || query.indexOf( EXRP_START ) == -1 )
        {
            return query;
        }

        int from = query.indexOf( EXRP_START );
        if ( from == 0 )
        {
            return null;
        }

        return query.substring( 0, from );
    }
}