RemoveDatanucleusPersistableTypesFacetFactory.java

/**
 *  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.object.ignore.datanucleus;

import java.lang.reflect.Method;
import java.util.List;

import com.google.common.collect.Lists;

import org.apache.isis.core.commons.factory.InstanceUtil;
import org.apache.isis.core.metamodel.facetapi.FeatureType;
import org.apache.isis.core.metamodel.facets.FacetFactoryAbstract;
import org.apache.isis.core.metamodel.facets.object.ignore.javalang.RemoveMethodsFacetFactory;
import org.apache.isis.core.metamodel.methodutils.MethodScope;

/**
 * Removes all methods inherited from <tt>org.datanucleus.enhancement.Persistable</tt> (if datanucleus 4.1.x is on the classpath).
 */
public class RemoveDatanucleusPersistableTypesFacetFactory extends FacetFactoryAbstract {

    private final List<RemoveMethodsFacetFactory.MethodAndParameterTypes> datanucleusPersistableMethodsToIgnore = Lists.newArrayList();

    public RemoveDatanucleusPersistableTypesFacetFactory() {
        super(FeatureType.OBJECTS_ONLY);

        final String typeToIgnoreIfOnClasspath = "org.datanucleus.enhancement.Persistable";
        try {
            Class<?> typeToIgnore = InstanceUtil.loadClass(typeToIgnoreIfOnClasspath);
            addMethodsToBeIgnored(typeToIgnore);
        } catch(Exception ex) {
            // ignore
        }
    }

    private void addMethodsToBeIgnored(Class<?> typeToIgnore) {
        final Method[] methods = typeToIgnore.getMethods();
        for (final Method method : methods) {
            datanucleusPersistableMethodsToIgnore
                    .add(new RemoveMethodsFacetFactory.MethodAndParameterTypes(method.getName(), method.getParameterTypes()));
        }
    }

    @Override
    public void process(final ProcessClassContext processClassContext) {
        for (final RemoveMethodsFacetFactory.MethodAndParameterTypes mapt : datanucleusPersistableMethodsToIgnore) {
            processClassContext.removeMethod(MethodScope.OBJECT, mapt.methodName, null, mapt.methodParameters);
        }
    }




}