EDIT

// $Id$

/**

* Copyright (C) 2015 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.io.edaphobase;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.util.HashMap;

import java.util.HashSet;

import java.util.Map;

import java.util.Set;

import org.apache.log4j.Logger;

import org.springframework.stereotype.Component;

import eu.etaxonomy.cdm.io.common.IPartitionedIO;

import eu.etaxonomy.cdm.io.common.ResultSetPartitioner;

import eu.etaxonomy.cdm.model.common.CdmBase;

import eu.etaxonomy.cdm.model.reference.Reference;

/**

 * @author a.mueller

 * @date 18.12.2015

 *

 */

@Component

public class EdaphobaseInReferenceImport extends EdaphobaseImportBase {

    private static final long serialVersionUID = 6895687693249076160L;

    private static final Logger logger = Logger.getLogger(EdaphobaseInReferenceImport.class);

    private static final String tableName = "lit_document";

    private static final String pluralString = "documents";

    /**

     * @param tableName

     * @param pluralString

     */

    public EdaphobaseInReferenceImport() {

        super(tableName, pluralString);

    }

    @Override

    protected String getIdQuery(EdaphobaseImportState state) {

        return    " SELECT DISTINCT document_id "

                + " FROM lit_document ld INNER JOIN tax_taxon t ON t.tax_document = ld.document_id "

                + " WHERE ld.parent_document_fk_document_id IS NOT NULL "

                + " ORDER BY document_id ";

    }

    @Override

    protected String getRecordQuery(EdaphobaseImportConfigurator config) {

        String result = " SELECT document_id, parent_document_fk_document_id "

                + " FROM lit_document ld "

                + " WHERE ld.document_id IN (@IDSET)";

        result = result.replace("@IDSET", IPartitionedIO.ID_LIST_TOKEN);

        return result;

    }

    @Override

    public boolean doPartition(ResultSetPartitioner partitioner, EdaphobaseImportState state) {

        ResultSet rs = partitioner.getResultSet();

        Set<Reference> referencesToSave = new HashSet<>();

        try {

            while (rs.next()){

                handleSingleReference(state, rs, referencesToSave);

            }

        } catch (SQLException e) {

            e.printStackTrace();

        }

        getReferenceService().saveOrUpdate(referencesToSave);

        return true;

    }

    /**

     * @param state

     * @param rs

     * @param referencesToSave

     * @throws SQLException

     */

    private void handleSingleReference(EdaphobaseImportState state, ResultSet rs, Set<Reference> referencesToSave) throws SQLException {

        Integer id = rs.getInt("document_id");

        Integer parentId = rs.getInt("parent_document_fk_document_id");

//        Integer documentType = nullSafeInt(rs, "document_type");

        Reference<?> child = state.getRelatedObject(REFERENCE_NAMESPACE, String.valueOf(id), Reference.class);

        Reference<?> parent = state.getRelatedObject(REFERENCE_NAMESPACE, String.valueOf(parentId), Reference.class);

        if (child == null){

            logger.warn("Child reference for document_id " + id + " is NULL" );

        }else if (parent == null){

            logger.warn("Parent reference for document_type_fk_document_type_id " + parentId + " is NULL" );

        }else{

            child.setInReference(parent);

            referencesToSave.add(child);

        }

    }

    @Override

    public Map<Object, Map<String, ? extends CdmBase>> getRelatedObjectsForPartition(ResultSet rs,

            EdaphobaseImportState state) {

        Map<Object, Map<String, ? extends CdmBase>> result = new HashMap<>();

        Set<String> referenceIdSet = new HashSet<String>();

        try {

            while (rs.next()){

                handleForeignKey(rs, referenceIdSet, "document_id");

                handleForeignKey(rs, referenceIdSet, "parent_document_fk_document_id");

            }

        } catch (SQLException e) {

            e.printStackTrace();

        }

        //reference map

        String nameSpace = REFERENCE_NAMESPACE;

        Class<?> cdmClass = Reference.class;

        Set<String> idSet = referenceIdSet;

        Map<String, Reference> referenceMap = (Map<String, Reference>)getCommonService().getSourcedObjectsByIdInSource(cdmClass, idSet, nameSpace);

        result.put(nameSpace, referenceMap);

        return result;

    }

    @Override

    protected boolean doCheck(EdaphobaseImportState state) {

        return false;

    }

    @Override

    protected boolean isIgnore(EdaphobaseImportState state) {

        return ! state.getConfig().isDoReferences();

    }

}