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.progmodel.facets.properties.validate.perspec;
021
022import java.util.List;
023
024import org.apache.isis.applib.events.ValidityEvent;
025import org.apache.isis.applib.spec.Specification;
026import org.apache.isis.applib.util.ReasonBuffer;
027import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
028import org.apache.isis.core.metamodel.facetapi.Facet;
029import org.apache.isis.core.metamodel.facetapi.FacetAbstract;
030import org.apache.isis.core.metamodel.facetapi.FacetHolder;
031import org.apache.isis.core.metamodel.interactions.ProposedHolder;
032import org.apache.isis.core.metamodel.interactions.ValidatingInteractionAdvisor;
033import org.apache.isis.core.metamodel.interactions.ValidityContext;
034
035public class MustSatisfySpecificationOnPropertyFacet extends FacetAbstract implements ValidatingInteractionAdvisor {
036
037    public static Class<? extends Facet> type() {
038        return MustSatisfySpecificationOnPropertyFacet.class;
039    }
040
041    private final List<Specification> specifications;
042
043    public MustSatisfySpecificationOnPropertyFacet(final List<Specification> specifications, final FacetHolder holder) {
044        super(type(), holder, Derivation.NOT_DERIVED);
045        this.specifications = specifications;
046    }
047
048    @Override
049    public String invalidates(final ValidityContext<? extends ValidityEvent> validityContext) {
050        if (!(validityContext instanceof ProposedHolder)) {
051            return null;
052        }
053        final ProposedHolder proposedHolder = (ProposedHolder) validityContext;
054        final ObjectAdapter targetNO = proposedHolder.getProposed();
055        final Object targetObject = targetNO.getObject();
056        final ReasonBuffer buf = new ReasonBuffer();
057        for (final Specification specification : specifications) {
058            buf.append(specification.satisfies(targetObject));
059        }
060        return buf.getReason();
061    }
062
063}