# MatchesSpecification.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.api.query.grammar;

    import org.qi4j.api.composite.Composite;
    import org.qi4j.api.property.Property;

    /**
     * Regular expression match Specification.
     */
    public class MatchesSpecification
        extends ExpressionSpecification
    {
        private PropertyFunction<String> property;
        private Object value;

        public MatchesSpecification( PropertyFunction<String> property, String regexp )
        {
            this.property = property;
            this.value = regexp;
        }

        public MatchesSpecification( PropertyFunction<String> property, Variable variable )
        {
            this.property = property;
            this.value = variable;
        }

        public PropertyFunction<String> property()
        {
            return property;
        }

        public Object value()
        {
            return value;
        }

        public String regexp()
        {
            return ( String ) value;
        }

        @Override
        public boolean satisfiedBy( Composite item )
        {
            Property<String> prop = property.map( item );

            if( prop == null )
            {
                return false;
            }

            String val = prop.get();

            if( val == null )
            {
                return false;
            }

            return val.matches( ( String ) value );
        }

        @Override
        public String toString()
        {
            return new StringBuilder()
                .append( "( " )
                .append( property )
                .append( " matches " )
                .append( "\"" )
                .append( value )
                .append( "\"" )
                .append( " )" )
                .toString();
        }
    }