001/*
002 *  Licensed to the Apache Software Foundation (ASF) under one
003 *  or more contributor license agreements.  See the NOTICE file
004 *  distributed with this work for additional information
005 *  regarding copyright ownership.  The ASF licenses this file
006 *  to you under the Apache License, Version 2.0 (the
007 *  "License"); you may not use this file except in compliance
008 *  with the License.  You may obtain a copy of the License at
009 *
010 *        http://www.apache.org/licenses/LICENSE-2.0
011 *
012 *  Unless required by applicable law or agreed to in writing,
013 *  software distributed under the License is distributed on an
014 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 *  KIND, either express or implied.  See the License for the
016 *  specific language governing permissions and limitations
017 *  under the License.
018 */
019
020package org.apache.isis.core.metamodel.specloader.validator;
021
022import java.util.Collection;
023
024import org.apache.isis.core.metamodel.spec.ObjectSpecification;
025
026public final class MetaModelValidatorVisiting extends MetaModelValidatorAbstract {
027
028    public static interface Visitor {
029        /**
030         * @return <tt>true</tt> continue visiting specs.
031         */
032        public boolean visit(ObjectSpecification objectSpec, ValidationFailures validationFailures);
033    }
034    public static interface SummarizingVisitor extends Visitor {
035        public void summarize(ValidationFailures validationFailures);
036    }
037    
038    private final Visitor visitor;
039    public MetaModelValidatorVisiting(final Visitor visitor) {
040        this.visitor = visitor;
041    }
042        
043    @Override
044    public final void validate(ValidationFailures validationFailures) {
045        final Collection<ObjectSpecification> objectSpecs = getSpecificationLoaderSpi().allSpecifications();
046        for (final ObjectSpecification objSpec : objectSpecs) {
047            if(!visitor.visit(objSpec, validationFailures)) {
048                break;
049            }
050        }
051        if(visitor instanceof SummarizingVisitor) {
052            SummarizingVisitor summarizingVisitor = (SummarizingVisitor) visitor;
053            summarizingVisitor.summarize(validationFailures);
054        }
055    }
056    
057}