# URLConstraint.java

    /*
     * Copyright (c) 2011, Paul Merlin. All Rights Reserved.
     *
     * 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.qi4j.library.constraints;

    import java.net.MalformedURLException;
    import org.qi4j.api.constraint.Constraint;
    import org.qi4j.library.constraints.annotation.URL;

    public class URLConstraint
        implements Constraint<URL, String>
    {

        private static final long serialVersionUID = 1L;

        @Override
        @SuppressWarnings( "ResultOfObjectAllocationIgnored" )
        public boolean isValid( URL annotation, String value )
        {
            try
            {
                new java.net.URL( value );
                return true;
            }
            catch( MalformedURLException ignored )
            {
                return false;
            }
        }

    }