GetIndicatorLinksHandler.java example

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activityinfo-master
package org.activityinfo.legacy.shared.impl;

/*
 * #%L
 * ActivityInfo Server
 * %%
 * Copyright (C) 2009 - 2013 UNICEF
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of the 
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public 
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/gpl-3.0.html>.
 * #L%
 */

import com.bedatadriven.rebar.sql.client.SqlResultCallback;
import com.bedatadriven.rebar.sql.client.SqlResultSet;
import com.bedatadriven.rebar.sql.client.SqlResultSetRow;
import com.bedatadriven.rebar.sql.client.SqlTransaction;
import com.bedatadriven.rebar.sql.client.query.SqlQuery;
import com.google.common.collect.Lists;
import com.google.gwt.user.client.rpc.AsyncCallback;
import org.activityinfo.legacy.shared.command.GetIndicatorLinks;
import org.activityinfo.legacy.shared.command.result.IndicatorLink;
import org.activityinfo.legacy.shared.command.result.IndicatorLinkResult;

import java.util.List;

public class GetIndicatorLinksHandler implements CommandHandlerAsync<GetIndicatorLinks, IndicatorLinkResult> {

    @Override
    public void execute(GetIndicatorLinks command,
                        ExecutionContext context,
                        final AsyncCallback<IndicatorLinkResult> callback) {

        SqlQuery.select()
                .appendColumn("L.SourceIndicatorId", "SourceIndicatorId")
                .appendColumn("SDB.DatabaseId", "SourceDatabaseId")
                .appendColumn("L.DestinationIndicatorId", "DestinationIndicatorId")
                .appendColumn("DDB.DatabaseId", "DestinationDatabaseId")
                .from(Tables.INDICATOR_LINK, "L")
                .innerJoin(Tables.INDICATOR, "SI")
                .on("SI.IndicatorId=L.SourceIndicatorId")
                .innerJoin(Tables.ACTIVITY, "SA")
                .on("SA.ActivityId=SI.ActivityId")
                .innerJoin(Tables.USER_DATABASE, "SDB")
                .on("SDB.DatabaseId=SA.DatabaseId")
                .innerJoin(Tables.INDICATOR, "DI")
                .on("DI.IndicatorId=L.DestinationIndicatorId")
                .innerJoin(Tables.ACTIVITY, "DA")
                .on("DA.ActivityId=DI.ActivityId")
                .innerJoin(Tables.USER_DATABASE, "DDB")
                .on("DDB.DatabaseId=DA.DatabaseId")
                .execute(context.getTransaction(), new SqlResultCallback() {

                    @Override
                    public void onSuccess(SqlTransaction tx, SqlResultSet results) {
                        List<IndicatorLink> links = Lists.newArrayList();
                        for (SqlResultSetRow row : results.getRows()) {
                            IndicatorLink link = new IndicatorLink();
                            link.setSourceDatabaseId(row.getInt("SourceDatabaseId"));
                            link.setSourceIndicatorId(row.getInt("SourceIndicatorId"));
                            link.setDestinationDatabaseId(row.getInt("DestinationDatabaseId"));
                            link.setDestinationIndicatorId(row.getInt("DestinationIndicatorId"));
                            links.add(link);
                        }
                        callback.onSuccess(new IndicatorLinkResult(links));
                    }
                });

    }

}