eu.esdihumboldt.hale.common.align.migrate.impl.DefaultCellMigrator.java Source code

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Here is the source code for eu.esdihumboldt.hale.common.align.migrate.impl.DefaultCellMigrator.java

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/*
 * Copyright (c) 2016 wetransform GmbH
 * 
 * All rights reserved. This program and the accompanying materials are made
 * available under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the License,
 * or (at your option) any later version.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution. If not, see <http://www.gnu.org/licenses/>.
 * 
 * Contributors:
 *     wetransform GmbH <http://www.wetransform.to>
 */

package eu.esdihumboldt.hale.common.align.migrate.impl;

import java.util.Optional;
import java.util.concurrent.atomic.AtomicBoolean;

import com.google.common.base.Objects;
import com.google.common.collect.ArrayListMultimap;
import com.google.common.collect.Maps.EntryTransformer;
import com.google.common.collect.Multimaps;

import eu.esdihumboldt.hale.common.align.migrate.AlignmentMigration;
import eu.esdihumboldt.hale.common.align.migrate.CellMigrator;
import eu.esdihumboldt.hale.common.align.migrate.MigrationOptions;
import eu.esdihumboldt.hale.common.align.model.Cell;
import eu.esdihumboldt.hale.common.align.model.Entity;
import eu.esdihumboldt.hale.common.align.model.EntityDefinition;
import eu.esdihumboldt.hale.common.align.model.MutableCell;
import eu.esdihumboldt.hale.common.align.model.annotations.messages.CellLog;
import eu.esdihumboldt.hale.common.align.model.impl.DefaultCell;
import eu.esdihumboldt.hale.common.align.model.impl.DefaultProperty;
import eu.esdihumboldt.hale.common.align.model.impl.DefaultType;
import eu.esdihumboldt.hale.common.align.model.impl.PropertyEntityDefinition;
import eu.esdihumboldt.hale.common.align.model.impl.TypeEntityDefinition;
import eu.esdihumboldt.hale.common.core.report.SimpleLog;

/**
 * Default implementation of migrator for single cells.
 * 
 * @author Simon Templer
 */
public class DefaultCellMigrator implements CellMigrator {

    @Override
    public MutableCell updateCell(final Cell originalCell, final AlignmentMigration migration,
            final MigrationOptions options, SimpleLog log) {
        MutableCell result = new DefaultCell(originalCell);

        SimpleLog cellLog = SimpleLog.all(log, new CellLog(result, CELL_LOG_CATEGORY));

        final AtomicBoolean replacedEntities = new AtomicBoolean(false);

        EntryTransformer<String, Entity, Entity> entityTransformer = new EntryTransformer<String, Entity, Entity>() {

            @Override
            public Entity transformEntry(String key, Entity value) {
                EntityDefinition org = value.getDefinition();

                Optional<EntityDefinition> replace = migration.entityReplacement(org, cellLog);

                EntityDefinition entity = replace.orElse(org);
                // FIXME what about null replacements / removals?

                if (!Objects.equal(entity, org)) {
                    replacedEntities.set(true);
                }

                if (entity instanceof PropertyEntityDefinition) {
                    return new DefaultProperty((PropertyEntityDefinition) entity);
                } else if (entity instanceof TypeEntityDefinition) {
                    return new DefaultType((TypeEntityDefinition) entity);
                } else {
                    throw new IllegalStateException("Invalid entity definition for creating entity");
                }
            }
        };

        // update source entities
        if (options.updateSource() && result.getSource() != null && !result.getSource().isEmpty()) {
            result.setSource(
                    ArrayListMultimap.create(Multimaps.transformEntries(result.getSource(), entityTransformer)));
        }

        // update target entities
        if (options.updateTarget() && result.getTarget() != null && !result.getTarget().isEmpty()) {
            result.setTarget(
                    ArrayListMultimap.create(Multimaps.transformEntries(result.getTarget(), entityTransformer)));
        }

        // TODO anything else?

        postUpdateCell(result, options, replacedEntities.get(), cellLog);

        return result;
    }

    /**
     * Called after updating a cell to migrate.
     * 
     * @param result the result cell
     * @param options the migration options
     * @param entitiesReplaced if any entities were replaced
     * @param log the cell log
     */
    protected void postUpdateCell(MutableCell result, MigrationOptions options, boolean entitiesReplaced,
            SimpleLog log) {
        // override me
    }

}