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.hidden.method;
021
022import java.lang.reflect.Method;
023
024import org.apache.isis.applib.events.VisibilityEvent;
025import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
026import org.apache.isis.core.metamodel.adapter.util.AdapterInvokeUtils;
027import org.apache.isis.core.metamodel.facetapi.FacetHolder;
028import org.apache.isis.core.metamodel.facetapi.FacetUtil;
029import org.apache.isis.core.metamodel.interactions.VisibilityContext;
030import org.apache.isis.core.progmodel.facets.object.hidden.HiddenObjectFacetAbstract;
031
032public class HiddenObjectFacetViaHiddenMethod extends HiddenObjectFacetAbstract {
033    private final Method method;
034
035    public HiddenObjectFacetViaHiddenMethod(final Method method, final FacetHolder holder) {
036        super(holder);
037        this.method = method;
038    }
039
040    @Override
041    public String hides(final VisibilityContext<? extends VisibilityEvent> ic) {
042        final ObjectAdapter toValidate = ic.getTarget();
043        return toValidate != null ? hiddenReason(toValidate) : null;
044    }
045
046    @Override
047    public String hiddenReason(final ObjectAdapter target) {
048        if (target == null) {
049            return null;
050        }
051        final Boolean isHidden = (Boolean) AdapterInvokeUtils.invoke(method, target);
052        return isHidden.booleanValue() ? "Hidden" : null;
053    }
054
055    @Override
056    public void copyOnto(final FacetHolder holder) {
057        final HiddenObjectFacetViaHiddenMethod clonedFacet = new HiddenObjectFacetViaHiddenMethod(this.method, holder);
058        FacetUtil.addFacet(clonedFacet);
059    }
060
061}