*  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

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*/

    public HomePageFacetAnnotationFactory() {

        super(FeatureType.ACTIONS_ONLY);

    }

    @Override

    public void process(ProcessMethodContext processMethodContext) {

        final HomePage annotation = Annotations.getAnnotation(processMethodContext.getMethod(), HomePage.class);

        if (annotation == null) {

            return;

        }

        final FacetedMethod facetHolder = processMethodContext.getFacetHolder();

        FacetUtil.addFacet(new HomePageFacetAnnotation(facetHolder));

    }

    /* (non-Javadoc)

     * @see org.apache.isis.core.metamodel.facetapi.MetaModelValidatorRefiner#refineMetaModelValidator(org.apache.isis.core.metamodel.specloader.validator.MetaModelValidatorComposite, org.apache.isis.core.commons.config.IsisConfiguration)

     */

    @Override

    public void refineMetaModelValidator(MetaModelValidatorComposite metaModelValidator, IsisConfiguration configuration) {

        metaModelValidator.add(new MetaModelValidatorVisiting(newValidatorVisitor()));

    }

    private Visitor newValidatorVisitor() {

        return new MetaModelValidatorVisiting.SummarizingVisitor() {

            private final List<String> annotated = Lists.newArrayList();

           

            @Override

            public boolean visit(ObjectSpecification objectSpec, ValidationFailures validationFailures) {

                final List<ObjectAction> objectActions = objectSpec.getObjectActions(Contributed.EXCLUDED);

                if(objectSpec.getCorrespondingClass() == AbstractHomePageDashboardService.class) {

                    // ignore this one

                    return true;

                }

                for (ObjectAction objectAction : objectActions) {

                    if(objectAction.containsFacet(HomePageFacet.class)) {

                        final String fullIdentifier = objectAction.getIdentifier().toClassAndNameIdentityString();

                       

                        // TODO: it would good to flag if the facet is found on any non-services, however

                        // ObjectSpecification.isService(...) can only be trusted once a PersistenceSession exists.

                        // this ought to be improved upon at some point...

                        annotated.add(fullIdentifier);

                       

                    }

                }

                return true; // keep searching

            }

            @Override

            public void summarize(ValidationFailures validationFailures) {

                if(annotated.size()>1) {

                    final String nonServiceNamesStr = Joiner.on(", ").join(annotated);

                    validationFailures.add(

                            "Only one service action can be specified as the dashboard; "

                            + "found HomePageFacet on these actions: %s", nonServiceNamesStr);

                }

            }

        };

    }

}