com.intelligentsia.dowsers.entity.store.MetaEntityStoreSupport.java Source code

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Here is the source code for com.intelligentsia.dowsers.entity.store.MetaEntityStoreSupport.java

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/**
 *        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 com.intelligentsia.dowsers.entity.store;

import java.util.Collection;

import com.google.common.base.Preconditions;
import com.google.common.collect.Sets;
import com.intelligentsia.dowsers.entity.meta.MetaEntity;
import com.intelligentsia.dowsers.entity.reference.Reference;

/**
 * MetaEntityStoreSupport.
 * 
 * @author <a href="mailto:jguibert@intelligents-ia.com" >Jerome Guibert</a>
 * 
 */
public class MetaEntityStoreSupport implements MetaEntityStore {

    /**
     * Underlying {@link EntityStore}.
     */
    private final EntityStore entityStore;

    /**
     * Build a new instance of MetaEntityStoreSupport.java.
     * 
     * @param entityStore
     * @throws NullPointerException
     *             if entityStore is null
     */
    public MetaEntityStoreSupport(final EntityStore entityStore) throws NullPointerException {
        super();
        this.entityStore = Preconditions.checkNotNull(entityStore);
    }

    @Override
    public Collection<MetaEntity> find(final Reference reference) throws NullPointerException {
        final Collection<MetaEntity> result = Sets.newLinkedHashSet();
        // we are looking for MetaEntity with attribute 'name' equals to
        // EntityClassName in reference parameter.
        final Reference target = new Reference(MetaEntity.class, "name",
                Preconditions.checkNotNull(reference).getEntityClassName());
        try {
            for (final Reference ref : entityStore.find(target)) {
                result.add(entityStore.find(MetaEntity.class, ref));
            }
        } catch (final EntityNotFoundException entityNotFoundException) {
            // oups
        }
        return result;
    }

    @Override
    public void store(final MetaEntity entity)
            throws NullPointerException, ConcurrencyException, IllegalArgumentException {
        entityStore.store(entity);
    }

    @Override
    public void remove(final MetaEntity entity) throws NullPointerException, IllegalArgumentException {
        entityStore.remove(entity);
    }

    @Override
    public void remove(final Reference reference) throws NullPointerException, IllegalArgumentException {
        Preconditions.checkArgument(MetaEntity.class.getSimpleName()
                .equals(Preconditions.checkNotNull(reference).getEntityClassName()));
        entityStore.remove(reference);
    }

}