# EntityTypeNotFoundException.java

    /*
     * Copyright (c) 2007, Rickard Öberg. All Rights Reserved.
     * Copyright (c) 2007-2008, Niclas Hedhman. All Rights Reserved.
     * Copyright (c) 2007, Alin Dreghiciu. 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.api.unitofwork;

    import org.qi4j.functional.Function;

    import static org.qi4j.functional.Iterables.fold;

    /**
     * Zest exception to be thrown in case that an entity composite
     * was not found during a lookup call.
     */
    public class EntityTypeNotFoundException
        extends UnitOfWorkException
    {
        private final String compositeType;

        public EntityTypeNotFoundException( String entityType, String moduleName, Iterable<String> visibility )
        {
            super( "Could not find an EntityComposite of type " + entityType + " in module [" + moduleName + "].\n" +
                   "\tThe following entity types are visible:\n" + join(visibility) );
            this.compositeType = entityType;
        }

        private static String join( Iterable<String> visibility )
        {
            return fold( new Function<String, String>()
            {
                StringBuilder result;
                {
                    result = new StringBuilder();
                }

                @Override
                public String map( String type )
                {
                    result.append( type );
                    result.append( "\n" );
                    return result.toString();
                }
            }, visibility );
        }

        public String compositeType()
        {
            return compositeType;
        }
    }