libraries/constraints/src/main/java/org/qi4j/library/constraints/MatchesConstraint.java

/*
 * 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.qi4j.library.constraints;

import java.util.regex.Pattern;
import org.qi4j.api.constraint.Constraint;
import org.qi4j.library.constraints.annotation.Matches;

/**
 * Implement @Matches constraint.
 */
public class MatchesConstraint
    implements Constraint<Matches, String>
{

    private static final long serialVersionUID = 1L;

    @Override
    public boolean isValid( Matches annotation, String argument )
    {
        if( argument != null )
        {
            Pattern pattern = Pattern.compile( annotation.value() );
            return pattern.matcher( argument ).matches();
        }

        return false;
    }

}