buckelieg.simpletools.db.ProcedureCallQuery Maven / Gradle / Ivy

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/*
* Copyright 2016 Anatoly Kutyakov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*    http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package buckelieg.simpletools.db;

import org.apache.log4j.Logger;

import javax.annotation.Nonnull;
import javax.annotation.ParametersAreNonnullByDefault;
import java.sql.CallableStatement;
import java.sql.SQLException;
import java.util.Objects;
import java.util.function.Consumer;

@ParametersAreNonnullByDefault
final class ProcedureCallQuery extends SelectQuery implements ProcedureCall {

    private static final Logger LOG = Logger.getLogger(ProcedureCallQuery.class);

    private Try._1 storedProcedureResultsHandler;
    private Consumer callback;

    ProcedureCallQuery(CallableStatement statement) {
        super(statement);
    }

    @Nonnull
    @Override
    public  Select setResultHandler(Try._1 mapper, Consumer consumer) {
        this.storedProcedureResultsHandler = Objects.requireNonNull(mapper, "Mapper must be provided");
        this.callback = Objects.requireNonNull(consumer, "Callback must be provided");
        return this;
    }

    @Override
    protected void doExecute() throws SQLException {
        if (statement.execute()) {
            this.rs = statement.getResultSet();
        }
    }

    @SuppressWarnings("unchecked")
    protected boolean doHasNext() throws SQLException {
        boolean moved = super.doHasNext();
        if (!moved) {
            if (statement.getMoreResults()) {
                if (rs != null && !rs.isClosed()) {
                    rs.close();
                }
                rs = statement.getResultSet();
                return super.doHasNext();
            }
            try {
                if (storedProcedureResultsHandler != null && callback != null) {
                    callback.accept(storedProcedureResultsHandler.doTry((CallableStatement) statement));
                }
            } finally {
                close();
            }
        }
        return moved;
    }

}