/*
* 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.facets.collections.modify;
import java.lang.reflect.Method;
import org.apache.isis.applib.services.i18n.TranslatableString;
import org.apache.isis.applib.services.i18n.TranslationService;
import org.apache.isis.core.commons.lang.StringExtensions;
import org.apache.isis.core.metamodel.exceptions.MetaModelException;
import org.apache.isis.core.metamodel.facetapi.FacetHolder;
import org.apache.isis.core.metamodel.facetapi.FacetUtil;
import org.apache.isis.core.metamodel.facetapi.FeatureType;
import org.apache.isis.core.metamodel.facetapi.IdentifiedHolder;
import org.apache.isis.core.metamodel.facets.FacetFactory;
import org.apache.isis.core.metamodel.facets.MethodFinderUtils;
import org.apache.isis.core.metamodel.facets.MethodPrefixBasedFacetFactoryAbstract;
import org.apache.isis.core.metamodel.facets.MethodPrefixConstants;
import org.apache.isis.core.metamodel.facets.collections.validate.CollectionValidateAddToFacetViaMethod;
import org.apache.isis.core.metamodel.facets.collections.validate.CollectionValidateRemoveFromFacetViaMethod;
import org.apache.isis.core.metamodel.methodutils.MethodScope;
/**
* TODO: should probably split out into two {@link FacetFactory}s, one for
* <tt>addTo()</tt>/<tt>removeFrom()</tt> and one for <tt>validateAddTo()</tt>/
* <tt>validateRemoveFrom()</tt>.
*/
public class CollectionAddToRemoveFromAndValidateFacetFactory extends MethodPrefixBasedFacetFactoryAbstract {
private static final String[] PREFIXES = {};
public CollectionAddToRemoveFromAndValidateFacetFactory() {
super(FeatureType.COLLECTIONS_ONLY, OrphanValidation.VALIDATE, PREFIXES);
}
@Override
public void process(final ProcessMethodContext processMethodContext) {
final Class<?> collectionType = attachAddToFacetAndRemoveFromFacet(processMethodContext);
attachValidateAddToAndRemoveFromFacetIfMethodsFound(processMethodContext, collectionType);
}
private Class<?> attachAddToFacetAndRemoveFromFacet(final ProcessMethodContext processMethodContext) {
final Method accessorMethod = processMethodContext.getMethod();
final String capitalizedName = StringExtensions.asJavaBaseName(accessorMethod.getName());
final Class<?> cls = processMethodContext.getCls();
// add
final Method addToMethod = MethodFinderUtils.findMethod(cls, MethodScope.OBJECT, MethodPrefixConstants.ADD_TO_PREFIX + capitalizedName, void.class);
processMethodContext.removeMethod(addToMethod);
// remove
final Method removeFromMethod = MethodFinderUtils.findMethod(cls, MethodScope.OBJECT, MethodPrefixConstants.REMOVE_FROM_PREFIX + capitalizedName, void.class);
processMethodContext.removeMethod(removeFromMethod);
// add facets
final FacetHolder collection = processMethodContext.getFacetHolder();
FacetUtil.addFacet(createAddToFacet(addToMethod, accessorMethod, collection));
FacetUtil.addFacet(createRemoveFromFacet(removeFromMethod, accessorMethod, collection));
// infer typ
final Class<?> addToType = ((addToMethod == null || addToMethod.getParameterTypes().length != 1) ? null : addToMethod.getParameterTypes()[0]);
final Class<?> removeFromType = ((removeFromMethod == null || removeFromMethod.getParameterTypes().length != 1) ? null : removeFromMethod.getParameterTypes()[0]);
return inferTypeOfIfPossible(accessorMethod, addToType, removeFromType, collection);
}
/**
* TODO need to distinguish between Java collections, arrays and other
* collections!
*/
private CollectionAddToFacet createAddToFacet(final Method addToMethodIfAny, final Method accessorMethod, final FacetHolder holder) {
if (addToMethodIfAny != null) {
return new CollectionAddToFacetViaMethod(addToMethodIfAny, holder);
} else {
return new CollectionAddToFacetViaAccessor(accessorMethod, holder);
}
}
/**
* TODO need to distinguish between Java collections, arrays and other
* collections!
*/
private CollectionRemoveFromFacet createRemoveFromFacet(final Method removeFromMethodIfAny, final Method accessorMethod, final FacetHolder holder) {
if (removeFromMethodIfAny != null) {
return new CollectionRemoveFromFacetViaMethod(removeFromMethodIfAny, holder);
} else {
return new CollectionRemoveFromFacetViaAccessor(accessorMethod, holder);
}
}
private Class<?> inferTypeOfIfPossible(final Method getMethod, final Class<?> addType, final Class<?> removeType, final FacetHolder collection) {
if (addType != null && removeType != null && addType != removeType) {
throw new MetaModelException("The addTo/removeFrom methods for " + getMethod.getDeclaringClass() + " must " + "both deal with same type of object: " + addType + "; " + removeType);
}
final Class<?> type = addType != null ? addType : removeType;
if (type != null) {
FacetUtil.addFacet(new TypeOfFacetInferredFromSupportingMethods(type, collection, getSpecificationLoader()));
}
return type;
}
private void attachValidateAddToAndRemoveFromFacetIfMethodsFound(final ProcessMethodContext processMethodContext, final Class<?> collectionType) {
attachValidateAddToFacetIfValidateAddToMethodIsFound(processMethodContext, collectionType);
attachValidateRemoveFacetIfValidateRemoveFromMethodIsFound(processMethodContext, collectionType);
}
private void attachValidateAddToFacetIfValidateAddToMethodIsFound(final ProcessMethodContext processMethodContext, final Class<?> collectionType) {
final Method getMethod = processMethodContext.getMethod();
final String capitalizedName = StringExtensions.asJavaBaseName(getMethod.getName());
final Class<?> cls = processMethodContext.getCls();
final Class<?>[] paramTypes = MethodFinderUtils.paramTypesOrNull(collectionType);
Method validateAddToMethod = MethodFinderUtils.findMethod(
cls, MethodScope.OBJECT,
MethodPrefixConstants.VALIDATE_ADD_TO_PREFIX + capitalizedName,
new Class<?>[]{String.class, TranslatableString.class},
paramTypes);
if (validateAddToMethod == null) {
validateAddToMethod = MethodFinderUtils.findMethod(
cls, MethodScope.OBJECT,
MethodPrefixConstants.VALIDATE_ADD_TO_PREFIX_2 + capitalizedName,
new Class<?>[]{String.class, TranslatableString.class},
MethodFinderUtils.paramTypesOrNull(collectionType));
}
if (validateAddToMethod == null) {
return;
}
processMethodContext.removeMethod(validateAddToMethod);
final IdentifiedHolder facetHolder = processMethodContext.getFacetHolder();
final TranslationService translationService = servicesInjector.lookupService(TranslationService.class);
// sadness: same as in TranslationFactory
final String translationContext = facetHolder.getIdentifier().toClassAndNameIdentityString();
final CollectionValidateAddToFacetViaMethod facet = new CollectionValidateAddToFacetViaMethod(validateAddToMethod, translationService, translationContext, facetHolder);
FacetUtil.addFacet(facet);
}
private void attachValidateRemoveFacetIfValidateRemoveFromMethodIsFound(final ProcessMethodContext processMethodContext, final Class<?> collectionType) {
final Method getMethod = processMethodContext.getMethod();
final String capitalizedName = StringExtensions.asJavaBaseName(getMethod.getName());
final Class<?> cls = processMethodContext.getCls();
final Class<?>[] paramTypes = MethodFinderUtils.paramTypesOrNull(collectionType);
Method validateRemoveFromMethod = MethodFinderUtils.findMethod(
cls, MethodScope.OBJECT,
MethodPrefixConstants.VALIDATE_REMOVE_FROM_PREFIX + capitalizedName,
new Class<?>[]{String.class, TranslatableString.class},
paramTypes);
if (validateRemoveFromMethod == null) {
validateRemoveFromMethod = MethodFinderUtils.findMethod(
cls, MethodScope.OBJECT,
MethodPrefixConstants.VALIDATE_REMOVE_FROM_PREFIX_2 + capitalizedName,
new Class<?>[]{String.class, TranslatableString.class},
MethodFinderUtils.paramTypesOrNull(collectionType));
}
if (validateRemoveFromMethod == null) {
return;
}
processMethodContext.removeMethod(validateRemoveFromMethod);
final IdentifiedHolder facetHolder = processMethodContext.getFacetHolder();
final TranslationService translationService = servicesInjector.lookupService(TranslationService.class);
// sadness: same as in TranslationFactory
final String translationContext = facetHolder.getIdentifier().toClassAndNameIdentityString();
final CollectionValidateRemoveFromFacetViaMethod facet = new CollectionValidateRemoveFromFacetViaMethod(validateRemoveFromMethod, translationService, translationContext, facetHolder);
FacetUtil.addFacet(facet);
}
}