/*
 *  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
 *
 *    https://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.grails.orm.hibernate.cfg;

import java.util.HashMap;
import java.util.Map;

import org.grails.orm.hibernate.cfg.domainbinding.hibernate.GrailsHibernatePersistentEntity;

/** Holder for the GORM mapping cache. */
public class MappingCacheHolder {

    private final Map<Class<?>, Mapping> MAPPING_CACHE = new HashMap<>();

    public MappingCacheHolder() {}

    /**
     * Obtains a mapping object for the given domain class nam
     *
     * @param theClass The domain class in question
     * @return A Mapping object or null
     */
    public Mapping getMapping(Class<?> theClass) {
        return theClass == null ? null : MAPPING_CACHE.get(theClass);
    }

    /**
     * Obtains a mapping object for the given domain class nam
     *
     * @param entity The domain class in question
     */
    public void cacheMapping(GrailsHibernatePersistentEntity entity) {
        if (entity != null) {
            MAPPING_CACHE.put(entity.getJavaClass(), entity.getHibernateMappedForm());
        }
    }

    /**
     * Testing method
     *
     * @param theClass The domain class
     * @param mapping The mapping
     */
    public void cacheMapping(Class<?> theClass, Mapping mapping) {
        if (theClass != null && mapping != null) {
            MAPPING_CACHE.put(theClass, mapping);
        }
    }

    public void clear() {
        MAPPING_CACHE.clear();
    }

    @SuppressWarnings("PMD.DataflowAnomalyAnalysis")
    public void clear(Class<?> theClass) {
        String className = theClass.getName();
        MAPPING_CACHE.entrySet().removeIf(entry -> className.equals(entry.getKey().getName()));
    }
}
