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// $Id$
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/**
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* Copyright (C) 2009 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.cdm.database.update;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import java.util.ArrayList;
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import java.util.List;
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import org.apache.log4j.Logger;
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import eu.etaxonomy.cdm.common.monitor.IProgressMonitor;
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import eu.etaxonomy.cdm.database.ICdmDataSource;
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/**
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* Removes a given term if it is not in use.
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* TODO does not yet check all DefinedTermBase_XXX tables except for representations.
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* Does also not handle AUD tables
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*
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* @author a.mueller
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* @date 06.09.2013
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*
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*/
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public class SingleTermRemover extends SchemaUpdaterStepBase<SingleTermRemover> implements ITermUpdaterStep{
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@SuppressWarnings("unused")
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private static final Logger logger = Logger.getLogger(SingleTermRemover.class);
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public static final SingleTermRemover NewInstance(String stepName, String uuidTerm, List<String> checkUsedQueries, int adapt){
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return new SingleTermRemover(stepName, uuidTerm, checkUsedQueries);
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}
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/**
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* @param firstCheckUsedQuery The first query to check if this term is used. Must return a single int value > 0
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* if this term is used at the given place.
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* @return
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*/
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public static final SingleTermRemover NewInstance(String stepName, String uuidTerm, String firstCheckUsedQuery, int adapt){
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List<String> checkUsedQueries = new ArrayList<String>();
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checkUsedQueries.add(firstCheckUsedQuery);
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return new SingleTermRemover(stepName, uuidTerm, checkUsedQueries);
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}
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private String uuidTerm ;
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private List<String> checkUsedQueries = new ArrayList<String>();
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private SingleTermRemover(String stepName, String uuidTerm, List<String> checkUsedQueries) {
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super(stepName);
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this.uuidTerm = uuidTerm;
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this.checkUsedQueries = checkUsedQueries;
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}
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@Override
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public Integer invoke(ICdmDataSource datasource, IProgressMonitor monitor, CaseType caseType) throws SQLException{
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//get term id
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String sql = " SELECT id FROM %s WHERE uuid = '%s'";
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Integer id = (Integer)datasource.getSingleValue(String.format(sql,
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caseType.transformTo("DefinedTermBase"), this.uuidTerm));
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if (id == null || id == 0){
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return 0;
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}
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//check if in use
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if (checkTermInUse(datasource, monitor, id, caseType)){
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return 0;
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}
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//if not ... remove
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removeTerm(datasource, monitor, id, caseType);
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return 0;
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}
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private void removeTerm(ICdmDataSource datasource, IProgressMonitor monitor, int id, CaseType caseType) throws SQLException {
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//get representation ids
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List<Integer> repIDs = new ArrayList<Integer>();
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getRepIds(datasource, id, repIDs, "representations_id", "DefinedTermBase_Representation", caseType );
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getRepIds(datasource, id, repIDs, "inverserepresentations_id", "RelationshipTermBase_inverseRepresentation", caseType);
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//remove MN table
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String sql = " DELETE FROM %s WHERE DefinedTermBase_id = %d";
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sql = String.format(sql, caseType.transformTo("DefinedTermBase_Representation"), id);
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datasource.executeUpdate(sql);
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sql = " DELETE FROM %s WHERE DefinedTermBase_id = %d";
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sql = String.format(sql, caseType.transformTo("RelationshipTermBase_inverseRepresentation"), id);
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datasource.executeUpdate(sql);
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//remove representations
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for (Integer repId : repIDs){
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sql = " DELETE FROM %s WHERE id = %d ";
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sql = String.format(sql,
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caseType.transformTo("Representation"),
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repId);
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datasource.executeUpdate(sql);
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}
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//remove term
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sql = " DELETE FROM %s WHERE id = %d";
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sql = String.format(sql,
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caseType.transformTo("DefinedTermBase"),
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id);
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datasource.executeUpdate(sql);
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}
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private void getRepIds(ICdmDataSource datasource, int id,
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List<Integer> repIDs, String mnRepresentationIdAttr, String mnTableName, CaseType caseType) throws SQLException {
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String sql = " SELECT DISTINCT %s as repId FROM %s WHERE DefinedTermBase_id = %d";
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sql = String.format(sql, mnRepresentationIdAttr, caseType.transformTo(mnTableName), id);
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ResultSet rs = datasource.executeQuery(sql);
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while (rs.next()){
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Integer repId = rs.getInt("repId"); //TODO nullSafe, but should not happen
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if (repId != null){
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repIDs.add(repId);
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}
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}
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}
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private boolean checkTermInUse(ICdmDataSource datasource, IProgressMonitor monitor, int id, CaseType caseType) throws SQLException {
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for (String query : checkUsedQueries){
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query = String.format(caseType.replaceTableNames(query), id);
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Number i = (Number)datasource.getSingleValue(query);
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if (i != null && (Long)i > 0.0){
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return true;
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}
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}
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return false;
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}
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public SingleTermRemover addCheckUsedQuery(String query, int adapt){
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this.checkUsedQueries.add(query);
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return this;
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}
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}
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