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.object.validate;
021
022import org.apache.isis.applib.events.ValidityEvent;
023import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
024import org.apache.isis.core.metamodel.facetapi.Facet;
025import org.apache.isis.core.metamodel.facetapi.FacetAbstract;
026import org.apache.isis.core.metamodel.facetapi.FacetHolder;
027import org.apache.isis.core.metamodel.interactions.ObjectValidityContext;
028import org.apache.isis.core.metamodel.interactions.ValidityContext;
029
030public abstract class ValidateObjectFacetAbstract extends FacetAbstract implements ValidateObjectFacet {
031
032    public static Class<? extends Facet> type() {
033        return ValidateObjectFacet.class;
034    }
035
036    public ValidateObjectFacetAbstract(final FacetHolder holder) {
037        super(type(), holder, Derivation.NOT_DERIVED);
038    }
039
040    @Override
041    public String invalidates(final ValidityContext<? extends ValidityEvent> vc) {
042        if (!(vc instanceof ObjectValidityContext)) {
043            return null;
044        }
045        final ObjectAdapter toValidate = vc.getTarget();
046        return toValidate != null ? invalidReason(toValidate) : null;
047    }
048
049}