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svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.db / org.gvsig.fmap.dal.db.jdbc / src / main / java / org / gvsig / fmap / dal / store / jdbc2 / spi / operations / PerformChangesOperation.java @ 45065

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/**
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 * gvSIG. Desktop Geographic Information System.
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 *
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 * Copyright (C) 2007-2020 gvSIG Association.
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 *
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 * This program is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU General Public License
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 * as published by the Free Software Foundation; either version 3
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 * of the License, or (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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 * MA  02110-1301, USA.
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 *
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 * For any additional information, do not hesitate to contact us
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 * at info AT gvsig.com, or visit our website www.gvsig.com.
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 */
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package org.gvsig.fmap.dal.store.jdbc2.spi.operations;
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import java.sql.Connection;
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import java.sql.PreparedStatement;
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import java.sql.SQLException;
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import java.sql.Statement;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.List;
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import org.apache.commons.collections.CollectionUtils;
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import org.apache.commons.lang3.StringUtils;
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import org.gvsig.expressionevaluator.ExpressionBuilder;
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import org.gvsig.expressionevaluator.ExpressionBuilder.Variable;
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import org.gvsig.expressionevaluator.GeometryExpressionBuilder;
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import org.gvsig.fmap.dal.DataTypes;
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import org.gvsig.fmap.dal.exception.DataException;
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import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor;
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import org.gvsig.fmap.dal.feature.FeatureReference;
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import org.gvsig.fmap.dal.feature.FeatureType;
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import org.gvsig.fmap.dal.feature.FeatureType.FeatureTypeChanged;
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import org.gvsig.fmap.dal.feature.spi.FeatureProvider;
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import org.gvsig.fmap.dal.feature.spi.FeatureReferenceProviderServices;
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import org.gvsig.fmap.dal.feature.spi.FeatureStoreProvider;
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import org.gvsig.fmap.dal.store.jdbc2.JDBCHelper;
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import org.gvsig.fmap.dal.store.jdbc.exception.JDBCExecuteSQLException;
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import org.gvsig.fmap.dal.store.jdbc.exception.JDBCSQLException;
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import org.gvsig.fmap.dal.store.jdbc.exception.JDBCUpdateWithoutChangesException;
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import org.gvsig.fmap.dal.store.jdbc2.spi.JDBCSQLBuilderBase;
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import org.gvsig.fmap.dal.store.jdbc2.JDBCUtils;
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import org.gvsig.fmap.dal.store.jdbc2.OperationsFactory.TableReference;
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import static org.gvsig.fmap.dal.store.jdbc2.spi.JDBCSQLBuilderBase.PROP_FEATURE_TYPE;
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import static org.gvsig.fmap.dal.store.jdbc2.spi.JDBCSQLBuilderBase.PROP_TABLE;
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import org.gvsig.tools.dispose.Disposable;
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import org.gvsig.tools.dispose.DisposeUtils;
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@SuppressWarnings("UseSpecificCatch")
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public class PerformChangesOperation extends AbstractConnectionWritableOperation {
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    protected TableReference table;
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    protected FeatureType featureType;
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    protected FeatureType featureTypeSource;
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    protected FeatureType featureTypeTarget;
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    protected Iterator<FeatureReferenceProviderServices> deleteds;
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    protected Iterator<FeatureProvider> updateds;
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    protected Iterator<FeatureProvider> inserteds;
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    protected boolean typeChanged = false;
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    public PerformChangesOperation(JDBCHelper helper) {
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        this(helper, null, null, null, null, null, null);
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    }
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    public PerformChangesOperation(JDBCHelper helper,
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            TableReference table,
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            FeatureType featureType,
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            Iterator<FeatureReferenceProviderServices> deleteds,
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            Iterator<FeatureProvider> inserteds,
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            Iterator<FeatureProvider> updateds,
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            Iterator<FeatureTypeChanged> featureTypesChanged) {
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        super(helper);
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        this.deleteds = deleteds;
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        this.inserteds = inserteds;
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        this.updateds = updateds;
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        this.table = table;
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        this.featureType = featureType;
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        if (featureTypesChanged.hasNext()) {
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            FeatureTypeChanged item = featureTypesChanged.next();
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            this.featureTypeSource = item.getSource();
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            this.featureTypeTarget = item.getTarget();
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            typeChanged = true;
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        } else {
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            this.featureTypeSource = null;
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            this.featureTypeTarget = null;
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            typeChanged = false;
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        }
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    }
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    public boolean isTypeChanged() {
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        return typeChanged;
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    }
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    @Override
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    public Object perform(Connection conn) throws DataException {
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        if (typeChanged) {
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            this.performUpdateTable(conn);
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        }
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        if (deleteds.hasNext()) {
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            performDeletes(conn);
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        }
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        if (updateds.hasNext()) {
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            performUpdates(conn);
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        }
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        if (inserteds.hasNext()) {
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            performInserts(conn);
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        }
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        return true;
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    }
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    public String getDeleteSQL() {
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        JDBCSQLBuilderBase sqlbuilder = createSQLBuilder();
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        return this.getDeleteSQL(sqlbuilder);
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    }
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    public String getDeleteSQL(JDBCSQLBuilderBase sqlbuilder) {
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        ExpressionBuilder expbuilder = sqlbuilder.expression();
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        sqlbuilder.delete().table()
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                .database(this.table.getDatabase())
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                .schema(this.table.getSchema())
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                .name(this.table.getTable());
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        for (FeatureAttributeDescriptor attr : this.featureType) {
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            if (attr.isPrimaryKey()) {
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                sqlbuilder.delete().where().and(
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                        expbuilder.eq(
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                                expbuilder.column(attr.getName()),
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                                expbuilder.parameter(attr.getName()).as_variable()
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                        )
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                );
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            }
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        }
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        if (!sqlbuilder.delete().has_where() ) {
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            throw new RuntimeException("Operation requires missing pk");
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        }
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        sqlbuilder.setProperties(
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                Variable.class, 
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                PROP_TABLE, table
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        );
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        String sql = sqlbuilder.delete().toString();
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        return sql;
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    }
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    public void performDeletes(Connection conn) throws DataException {
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        JDBCSQLBuilderBase sqlbuilder = createSQLBuilder();
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        String sql = getDeleteSQL(sqlbuilder);
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        PreparedStatement st = null;
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        Disposable paramsDisposer = null;
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        try {
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            st = conn.prepareStatement(sql);
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            while (deleteds.hasNext()) {
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                FeatureReference reference = (FeatureReference) deleteds.next();
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                paramsDisposer = sqlbuilder.setParameters(st, reference);
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                int nAffected = JDBCUtils.executeUpdate(st,sql);
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                if (nAffected == 0) {
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                    throw new JDBCUpdateWithoutChangesException(
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                            sqlbuilder.delete().toString(),
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                            null
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                    );
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                }
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                if (nAffected > 1) {
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                    LOGGER.warn("Remove statement affectst to {} rows ( {} )",
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                            nAffected, sql
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                    );
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                }
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            }
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        } catch (SQLException e) {
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            throw new JDBCSQLException(e);
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        } finally {
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            JDBCUtils.closeQuietly(st);
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            DisposeUtils.disposeQuietly(paramsDisposer);
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        }
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    }
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    public String getInsertSQL() {
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        JDBCSQLBuilderBase sqlbuilder = createSQLBuilder();
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        return this.getInsertSQL(sqlbuilder);
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    }
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    public String getInsertSQL(JDBCSQLBuilderBase sqlbuilder) {
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        GeometryExpressionBuilder expbuilder = sqlbuilder.expression();
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        sqlbuilder.insert().table()
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                .database(this.table.getDatabase())
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                .schema(this.table.getSchema())
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                .name(this.table.getTable());
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        for (FeatureAttributeDescriptor attr : this.featureType) {
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            if( attr.isAutomatic() || attr.isComputed() ) {
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                continue;
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            }
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            if (attr.getType() == DataTypes.GEOMETRY) {
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                sqlbuilder.insert().column().name(attr.getName()).with_value(
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                    expbuilder.parameter(attr.getName()).as_variable()
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                        .srs(
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                            expbuilder.parameter().value(
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                                attr.getSRS()).as_constant()
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                        )
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                );
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            } else {
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                sqlbuilder.insert().column().name(attr.getName()).with_value(
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                        expbuilder.parameter(attr.getName())
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                );
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            }
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        }
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        sqlbuilder.setProperties(
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                Variable.class, 
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                PROP_FEATURE_TYPE, featureType,
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                PROP_TABLE, table
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        );
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        String sql = sqlbuilder.insert().toString();
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        return sql;
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    }
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    public void performInserts(Connection conn) throws DataException {
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        JDBCSQLBuilderBase sqlbuilder = createSQLBuilder();
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        String sql = getInsertSQL(sqlbuilder);
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        PreparedStatement st;
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        Disposable paramsDisposer;
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        try {
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            st = conn.prepareStatement(sql);
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            while (inserteds.hasNext()) {
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                FeatureProvider feature = inserteds.next();
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                paramsDisposer = sqlbuilder.setParameters(st, feature);
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                try {
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                    if (JDBCUtils.executeUpdate(st,sql) == 0) {
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                        throw new JDBCExecuteSQLException(
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                                sqlbuilder.insert().toString(),
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                                null
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                        );
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                    }
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                } finally {
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                    DisposeUtils.disposeQuietly(paramsDisposer);
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                }
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            }
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        } catch (JDBCExecuteSQLException ex) {
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            throw ex;
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        } catch (Exception ex) {
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            throw new JDBCExecuteSQLException(sql,ex);
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        }
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    }
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    public String getUpdateSQL() {
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        JDBCSQLBuilderBase sqlbuilder = createSQLBuilder();
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        return this.getUpdateSQL(sqlbuilder);
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    }
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    public String getUpdateSQL(JDBCSQLBuilderBase sqlbuilder) {
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        GeometryExpressionBuilder expbuilder = sqlbuilder.expression();
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        sqlbuilder.update().table()
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                .database(this.table.getDatabase())
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                .schema(this.table.getSchema())
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                .name(this.table.getTable());
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        for (FeatureAttributeDescriptor attr : this.featureType) {
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            if (attr.isPrimaryKey()) {
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                sqlbuilder.update().where().and(
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                        expbuilder.eq(
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                                expbuilder.column(attr.getName()),
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                                expbuilder.parameter(attr.getName()).as_variable()
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                        )
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                );
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                continue;
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            } 
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            if ( attr.isAutomatic() || attr.isReadOnly() || attr.isComputed() ) {
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                continue;
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            }
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            if (attr.getType() == DataTypes.GEOMETRY) {
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                sqlbuilder.update().column().name(attr.getName()).with_value(
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                    expbuilder.parameter(attr.getName()).as_geometry_variable().srs(
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                        expbuilder.parameter().value(attr.getSRS()).as_constant()
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                    )
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                );
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            } else {
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                sqlbuilder.update().column().name(attr.getName()).with_value(
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                    expbuilder.parameter(attr.getName()).as_variable()
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                );
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            }
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        }
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        if (!sqlbuilder.update().has_where() ) {
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            throw new RuntimeException("Operation requires missing pk");
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        }
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        sqlbuilder.setProperties(
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                Variable.class, 
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                PROP_FEATURE_TYPE, this.featureType,
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                PROP_TABLE, table
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        );
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        String sql = sqlbuilder.update().toString();
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        return sql;
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    }
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    public void performUpdates(Connection conn) throws DataException {
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308
        JDBCSQLBuilderBase sqlbuilder = createSQLBuilder();
309
        String sql = getUpdateSQL(sqlbuilder);
310
        
311
        PreparedStatement st = null;
312
        Disposable paramsDisposer = null;
313
        try {
314
            st = conn.prepareStatement(sql);
315
            while (updateds.hasNext()) {
316
                FeatureProvider featureProvider = (FeatureProvider) updateds.next();
317
                paramsDisposer = sqlbuilder.setParameters(st, featureProvider);
318
                if (JDBCUtils.executeUpdate(st,sql) == 0) {
319
                    throw new JDBCUpdateWithoutChangesException(sql,null);
320
                }
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            }
322
        } catch (SQLException e) {
323
            throw new JDBCSQLException(e);
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        } finally {
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            JDBCUtils.closeQuietly(st);
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            DisposeUtils.disposeQuietly(paramsDisposer);
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        }
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    }
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    public List<String> getUpdateTableSQLs() {
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        JDBCSQLBuilderBase sqlbuilder = createSQLBuilder();
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        sqlbuilder.alter_table().table()
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                .database(this.table.getDatabase())
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                .schema(this.table.getSchema())
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                .name(this.table.getTable());
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337
        for (FeatureAttributeDescriptor attrOrgiginal : featureTypeSource) {
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            FeatureAttributeDescriptor attrTarget = featureTypeTarget.getAttributeDescriptor(
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                    attrOrgiginal.getName()
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            );
341
            if (attrTarget == null) {
342
                if( attrOrgiginal.isComputed() ) {
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                    continue;
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                }
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                sqlbuilder.alter_table().drop_column(attrOrgiginal.getName());
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            } else if( !this.areEquals(attrOrgiginal, attrTarget) ) {
347
                if( attrTarget.isComputed() ) {
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                    continue;
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                }
350
                if( attrTarget.getType()==DataTypes.GEOMETRY ) {
351
                    sqlbuilder.alter_table().alter_geometry_column(
352
                            attrTarget.getName(),
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                            attrTarget.getGeomType().getType(),
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                            attrTarget.getGeomType().getSubType(),
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                            attrTarget.getSRS(),
356
                            attrTarget.isIndexed(),
357
                            attrTarget.allowNull()
358
                    );
359
                } else {
360
                    sqlbuilder.alter_table().alter_column(
361
                            attrTarget.getName(),
362
                            attrTarget.getType(),
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                            attrTarget.getSize(),
364
                            attrTarget.getPrecision(),
365
                            attrTarget.getScale(),
366
                            attrTarget.isPrimaryKey(),
367
                            attrTarget.isIndexed(),
368
                            attrTarget.allowNull(),
369
                            attrTarget.isAutomatic(),
370
                            attrTarget.getDefaultValue()
371
                    );
372
                }
373
            }
374
        }
375
        for (FeatureAttributeDescriptor attrTarget : featureTypeTarget) {
376
            if( attrTarget.isComputed() ) {
377
                continue;
378
            }
379
            if (featureTypeSource.getAttributeDescriptor(attrTarget.getName()) == null) {
380
                if( attrTarget.getType()==DataTypes.GEOMETRY ) {
381
                    sqlbuilder.alter_table().add_geometry_column(
382
                            attrTarget.getName(),
383
                            attrTarget.getGeomType().getType(),
384
                            attrTarget.getGeomType().getSubType(),
385
                            attrTarget.getSRS(),
386
                            attrTarget.isIndexed(),
387
                            attrTarget.allowNull()
388
                    );
389
                } else {
390
                    sqlbuilder.alter_table().add_column(
391
                            attrTarget.getName(),
392
                            attrTarget.getType(),
393
                            attrTarget.getSize(),
394
                            attrTarget.getPrecision(),
395
                            attrTarget.getScale(),
396
                            attrTarget.isPrimaryKey(),
397
                            attrTarget.isIndexed(),
398
                            attrTarget.allowNull(),
399
                            attrTarget.isAutomatic(),
400
                            attrTarget.getDefaultValue()
401
                    );
402
                }
403
            }
404
        }
405
        sqlbuilder.setProperties(
406
                Variable.class, 
407
                PROP_TABLE, table
408
        );
409
        
410
        List<String> sqls = sqlbuilder.alter_table().toStrings();
411
        sqls.addAll(buildCreateIndexSQL());
412
        return sqls;
413
    }
414
    
415
    protected boolean areEquals(FeatureAttributeDescriptor attr1, FeatureAttributeDescriptor attr2) {
416
        // No interesa si son o no iguales en general, solo si son iguales en lo 
417
        // que a los atributos usados para crear la columna de la tabla se refiere.
418
        if( !StringUtils.equals(attr1.getName(), attr2.getName()) ) {
419
            return false;
420
        }
421
        if( attr1.getType() != attr2.getType() ) {
422
            return false;
423
        }
424
        if( attr1.getPrecision() != attr2.getPrecision() ) {
425
            return false;
426
        }
427
        if( attr1.getScale() != attr2.getScale() ) {
428
            return false;
429
        }
430
        if( attr1.getSize() != attr2.getSize() ) {
431
            return false;
432
        }
433
        if( attr1.isPrimaryKey() != attr2.isPrimaryKey() ) {
434
            return false;
435
        }        
436
//        if( attr1.isIndexed() != attr2.isIndexed() ) {
437
//            return false;
438
//        }
439
        if( attr1.allowNull() != attr2.allowNull() ) {
440
            return false;
441
        }
442
        if( attr1.isAutomatic() != attr2.isAutomatic() ) {
443
            return false;
444
        }
445
        if( attr1.getDefaultValue() != attr2.getDefaultValue() ) {
446
            if( attr1.getDefaultValue()==null || attr2.getDefaultValue()==null) {
447
                return false;
448
            }
449
            if( !attr1.getDefaultValue().equals(attr2.getDefaultValue()) ) {
450
                return false;
451
            }
452
        }
453
        return true;
454
    }
455

    
456
    protected List<String> buildCreateIndexSQL() {
457
        ArrayList<String> sqls = new ArrayList<>();
458
        
459
        for (FeatureAttributeDescriptor attrTarget : featureTypeTarget) {
460
            boolean createIndex = false;
461
            if( attrTarget.isIndexed() ) {
462
                FeatureAttributeDescriptor attrOriginal = featureTypeSource.getAttributeDescriptor(attrTarget.getName());
463
                if ( attrOriginal == null) {
464
                    createIndex = true;
465
                } else {
466
                    if( attrOriginal.isIndexed() ) {
467
                        createIndex = false;
468
                    } else {
469
                        createIndex = true;
470
                    }
471
                }
472
            }
473
            if( createIndex ) {
474
                JDBCSQLBuilderBase sqlbuilder = createSQLBuilder();
475
                if( attrTarget.getType()==DataTypes.GEOMETRY ) {
476
                    sqlbuilder.create_index().spatial();
477
                }
478
                sqlbuilder.create_index().if_not_exist();
479
                sqlbuilder.create_index().name("idx_" + table + "_" + attrTarget.getName());
480
                sqlbuilder.create_index().column(attrTarget.getName());
481
                sqlbuilder.create_index().table()
482
                    .database(this.table.getDatabase())
483
                    .schema(this.table.getSchema())
484
                    .name(this.table.getTable());
485
                sqlbuilder.setProperties(
486
                        Variable.class, 
487
                        PROP_TABLE, table
488
                );
489
                sqls.addAll(sqlbuilder.create_index().toStrings());
490
            }
491
        }
492
        return sqls;
493
    }
494
    
495
    public void performUpdateTable(Connection conn) throws DataException {
496
        
497
        List<String> sqls = this.getUpdateTableSQLs();
498

    
499
        if( !CollectionUtils.isEmpty(sqls) ) {
500
            Statement st = null;
501
            try {
502
                st = conn.createStatement();
503
                for (String sql : sqls) {
504
                    if( !StringUtils.isBlank(sql) ) {
505
                        JDBCUtils.execute(st, sql);
506
                    }
507
                }
508
            } catch (SQLException e) {
509
                throw new JDBCSQLException(e);
510
            } finally {
511
                JDBCUtils.closeQuietly(st);
512
            }
513
        }
514
    }
515
}