eu.esdihumboldt.hale.common.align.model.functions.join.JoinMigrator.java Source code

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Here is the source code for eu.esdihumboldt.hale.common.align.model.functions.join.JoinMigrator.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.model.functions.join;

import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

import com.google.common.collect.ArrayListMultimap;
import com.google.common.collect.ListMultimap;

import eu.esdihumboldt.hale.common.align.migrate.AlignmentMigration;
import eu.esdihumboldt.hale.common.align.migrate.MigrationOptions;
import eu.esdihumboldt.hale.common.align.migrate.impl.DefaultCellMigrator;
import eu.esdihumboldt.hale.common.align.model.Cell;
import eu.esdihumboldt.hale.common.align.model.MutableCell;
import eu.esdihumboldt.hale.common.align.model.ParameterValue;
import eu.esdihumboldt.hale.common.align.model.annotations.messages.CellLog;
import eu.esdihumboldt.hale.common.align.model.functions.JoinFunction;
import eu.esdihumboldt.hale.common.align.model.functions.join.JoinParameter.JoinCondition;
import eu.esdihumboldt.hale.common.align.model.impl.PropertyEntityDefinition;
import eu.esdihumboldt.hale.common.align.model.impl.TypeEntityDefinition;
import eu.esdihumboldt.hale.common.core.io.Value;
import eu.esdihumboldt.hale.common.core.report.SimpleLog;

/**
 * Cell migrator for joins.
 * 
 * @author Simon Templer
 */
public class JoinMigrator extends DefaultCellMigrator {

    @Override
    public MutableCell updateCell(Cell originalCell, AlignmentMigration migration, MigrationOptions options,
            SimpleLog log) {
        MutableCell result = super.updateCell(originalCell, migration, options, log);
        SimpleLog cellLog = SimpleLog.all(log, new CellLog(result, CELL_LOG_CATEGORY));

        if (options.updateSource()) {
            ListMultimap<String, ParameterValue> modParams = ArrayListMultimap
                    .create(result.getTransformationParameters());
            List<ParameterValue> joinParams = modParams.get(JoinFunction.PARAMETER_JOIN);
            if (!joinParams.isEmpty()) {
                JoinParameter joinParam = joinParams.get(0).as(JoinParameter.class);
                if (joinParam != null) {
                    joinParams.clear();
                    joinParams.add(new ParameterValue(
                            Value.complex(convertJoinParameter(joinParam, migration, options, cellLog))));
                }
            }
            result.setTransformationParameters(modParams);
        }

        return result;
    }

    /**
     * Migrate a join parameter based on an {@link AlignmentMigration}.
     * 
     * @param joinParam the join parameter to migrate
     * @param migration the alignment migration
     * @param options the migration options
     * @param log the migration log
     * @return the migrated join parameter
     */
    private JoinParameter convertJoinParameter(JoinParameter joinParam, AlignmentMigration migration,
            MigrationOptions options, SimpleLog log) {

        List<TypeEntityDefinition> types = joinParam.getTypes().stream().map(type -> {
            return (TypeEntityDefinition) migration.entityReplacement(type, log).orElse(type);
        }).collect(Collectors.toList());

        Set<JoinCondition> conditions = joinParam.getConditions().stream().map(condition -> {
            PropertyEntityDefinition baseProperty = (PropertyEntityDefinition) migration
                    .entityReplacement(condition.baseProperty, log).orElse(condition.baseProperty);
            PropertyEntityDefinition joinProperty = (PropertyEntityDefinition) migration
                    .entityReplacement(condition.joinProperty, log).orElse(condition.joinProperty);
            JoinCondition result = new JoinCondition(baseProperty, joinProperty);
            return result;
        }).collect(Collectors.toSet());

        return new JoinParameter(types, conditions);
    }

}