/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.isis.core.metamodel.facetapi;
import org.apache.isis.applib.filter.Filter;
import org.apache.isis.applib.filter.Filters;
public final class FacetFilters {
private FacetFilters() {
}
/**
* {@link Filter<Facet>#accept(Facet) Accepts} everything.
*/
public static final Filter<Facet> ANY = Filters.anyOfType(Facet.class);
/**
* {@link Filter<Facet>#accept(Facet) Accepts} nothing.
*/
public static final Filter<Facet> NONE = new Filter<Facet>() {
@Override
public boolean accept(final Facet facet) {
return false;
}
};
public static Filter<Facet> isA(final Class<?> superClass) {
return new Filter<Facet>() {
@Override
public boolean accept(final Facet facet) {
if (facet instanceof DecoratingFacet) {
final DecoratingFacet<?> decoratingFacet = (DecoratingFacet<?>) facet;
return accept(decoratingFacet.getDecoratedFacet());
}
return superClass.isAssignableFrom(facet.getClass());
}
};
}
}