/*
* 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.param.defaults.methodnum;
import java.lang.reflect.Method;
import java.util.List;
import org.apache.isis.core.commons.lang.ListExtensions;
import org.apache.isis.core.commons.lang.StringExtensions;
import org.apache.isis.core.metamodel.exceptions.MetaModelException;
import org.apache.isis.core.metamodel.facetapi.Facet;
import org.apache.isis.core.metamodel.facetapi.FacetUtil;
import org.apache.isis.core.metamodel.facetapi.FeatureType;
import org.apache.isis.core.metamodel.facets.FacetedMethod;
import org.apache.isis.core.metamodel.facets.FacetedMethodParameter;
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.actions.defaults.ActionDefaultsFacet;
import org.apache.isis.core.metamodel.methodutils.MethodScope;
import org.apache.isis.core.metamodel.services.ServicesInjector;
import org.apache.isis.core.metamodel.services.persistsession.PersistenceSessionServiceInternal;
/**
* Sets up all the {@link Facet}s for an action in a single shot.
*/
public class ActionParameterDefaultsFacetViaMethodFactory extends MethodPrefixBasedFacetFactoryAbstract {
private static final String[] PREFIXES = {};
/**
* Note that the {@link Facet}s registered are the generic ones from
* noa-architecture (where they exist)
*/
public ActionParameterDefaultsFacetViaMethodFactory() {
super(FeatureType.ACTIONS_ONLY, OrphanValidation.VALIDATE, PREFIXES);
}
// ///////////////////////////////////////////////////////
// Actions
// ///////////////////////////////////////////////////////
@Override
public void process(final ProcessMethodContext processMethodContext) {
final FacetedMethod facetedMethod = processMethodContext.getFacetHolder();
final List<FacetedMethodParameter> holderList = facetedMethod.getParameters();
attachDefaultFacetForParametersIfDefaultsNumMethodIsFound(processMethodContext, holderList);
}
private void attachDefaultFacetForParametersIfDefaultsNumMethodIsFound(final ProcessMethodContext processMethodContext, final List<FacetedMethodParameter> parameters) {
if (parameters.isEmpty()) {
return;
}
final Method actionMethod = processMethodContext.getMethod();
final Class<?>[] paramTypes = actionMethod.getParameterTypes();
for (int i = 0; i < paramTypes.length; i++) {
// attempt to match method...
Method defaultMethod = findDefaultNumMethod(processMethodContext, i);
if (defaultMethod == null) {
continue;
}
processMethodContext.removeMethod(defaultMethod);
final FacetedMethod facetedMethod = processMethodContext.getFacetHolder();
if (facetedMethod.containsDoOpFacet(ActionDefaultsFacet.class)) {
final Class<?> cls2 = processMethodContext.getCls();
throw new MetaModelException(cls2 + " uses both old and new default syntax for " + actionMethod.getName() + "(...) - must use one or other");
}
// add facets directly to parameters, not to actions
final FacetedMethodParameter paramAsHolder = parameters.get(i);
FacetUtil.addFacet(new ActionParameterDefaultsFacetViaMethod(defaultMethod, paramAsHolder, adapterManager));
}
}
/**
* search successively for the default method, trimming number of param types each loop
*/
private static Method findDefaultNumMethod(ProcessMethodContext processMethodContext, int n) {
final Method actionMethod = processMethodContext.getMethod();
final List<Class<?>> paramTypes = ListExtensions.mutableCopy(actionMethod.getParameterTypes());
final int numParamTypes = paramTypes.size();
for(int i=0; i< numParamTypes+1; i++) {
final Method method = findDefaultNumMethod(processMethodContext, n, paramTypes.toArray(new Class<?>[]{}));
if(method != null) {
return method;
}
// remove last, and search again
if(!paramTypes.isEmpty()) {
paramTypes.remove(paramTypes.size()-1);
}
}
return null;
}
private static Method findDefaultNumMethod(final ProcessMethodContext processMethodContext, int n, Class<?>[] paramTypes) {
final Class<?> cls = processMethodContext.getCls();
final Method actionMethod = processMethodContext.getMethod();
final Class<?> returnType = actionMethod.getParameterTypes()[n];
final String capitalizedName = StringExtensions.asCapitalizedName(actionMethod.getName());
return MethodFinderUtils.findMethod(cls, MethodScope.OBJECT, MethodPrefixConstants.DEFAULT_PREFIX + n + capitalizedName, returnType, paramTypes);
}
// ///////////////////////////////////////////////////////////////
// Dependencies
// ///////////////////////////////////////////////////////////////
@Override
public void setServicesInjector(final ServicesInjector servicesInjector) {
super.setServicesInjector(servicesInjector);
adapterManager = servicesInjector.getPersistenceSessionServiceInternal();
}
PersistenceSessionServiceInternal adapterManager;
}