ContainsSpecification.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 java.util.Collection;
import org.qi4j.api.composite.Composite;

/**
 * Contains Specification.
 */
public class ContainsSpecification<T>
    extends ExpressionSpecification
{
    private PropertyFunction<? extends Collection<T>> collectionProperty;
    private T value;

    public ContainsSpecification( PropertyFunction<? extends Collection<T>> collectionProperty, T value )
    {
        this.collectionProperty = collectionProperty;
        this.value = value;
    }

    public PropertyFunction<? extends Collection<T>> collectionProperty()
    {
        return collectionProperty;
    }

    public T value()
    {
        return value;
    }

    @Override
    public boolean satisfiedBy( Composite item )
    {
        Collection<T> collection = collectionProperty.map( item ).get();

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

        return collection.contains( value );
    }

    @Override
    public String toString()
    {
        return collectionProperty + " contains " + value;
    }
}