/*
* 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 java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.isis.applib.filter.Filter;
/**
* For base subclasses or, more likely, to help write tests.
*/
public class FacetHolderImpl implements FacetHolder {
private final Map<Class<? extends Facet>, Facet> facetsByClass = new HashMap<Class<? extends Facet>, Facet>();
@Override
public boolean containsFacet(final Class<? extends Facet> facetType) {
return getFacet(facetType) != null;
}
@Override
public boolean containsDoOpFacet(final Class<? extends Facet> facetType) {
final Facet facet = getFacet(facetType);
return facet != null && !facet.isNoop();
}
@Override
public boolean containsDoOpNotDerivedFacet(final Class<? extends Facet> facetType) {
final Facet facet = getFacet(facetType);
return facet != null && !facet.isNoop() && !facet.isDerived();
}
@Override
public void addFacet(final Facet facet) {
addFacet(facet.facetType(), facet);
}
@Override
public void addFacet(final MultiTypedFacet facet) {
final Class<? extends Facet>[] facetTypes = facet.facetTypes();
for (final Class<? extends Facet> facetType : facetTypes) {
addFacet(facetType, facet.getFacet(facetType));
}
}
private void addFacet(final Class<? extends Facet> facetType, final Facet facet) {
final Facet existingFacet = getFacet(facetType);
if (existingFacet == null || existingFacet.isNoop()) {
facetsByClass.put(facetType, facet);
return;
}
if (!facet.alwaysReplace()) {
return;
}
if (facet.isDerived() && !existingFacet.isDerived()) {
return;
}
facet.setUnderlyingFacet(existingFacet);
facetsByClass.put(facetType, facet);
}
@Override
public void removeFacet(final Facet facet) {
FacetUtil.removeFacet(facetsByClass, facet);
}
@Override
public void removeFacet(final Class<? extends Facet> facetType) {
FacetUtil.removeFacet(facetsByClass, facetType);
}
@Override
@SuppressWarnings("unchecked")
public <T extends Facet> T getFacet(final Class<T> facetType) {
return (T) facetsByClass.get(facetType);
}
@Override
public Class<? extends Facet>[] getFacetTypes() {
return FacetUtil.getFacetTypes(facetsByClass);
}
@Override
public List<Facet> getFacets(final Filter<Facet> filter) {
return FacetUtil.getFacets(facetsByClass, filter);
}
}