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Groovy example source code file (BatchingPreparedStatementWrapper.java)

This example Groovy source code file (BatchingPreparedStatementWrapper.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

batchingpreparedstatementwrapper, batchingpreparedstatementwrapper, batchingstatementwrapper, jdbc, list, list, log, logger, logging, preparedstatement, sql, sql, sqlexception, sqlexception, util

The Groovy BatchingPreparedStatementWrapper.java source code

/*
 * Copyright 2003-2011 the original author or authors.
 *
 * 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 groovy.sql;

import groovy.lang.Tuple;

import java.sql.PreparedStatement;
import java.sql.SQLException;

import java.util.Arrays;
import java.util.List;
import java.util.logging.Logger;

/**
 * Class which delegates to a PreparedStatement but keeps track of
 * a batch count size. If the batch count reaches the predefined number,
 * this Statement does an executeBatch() automatically. If batchSize is
 * zero, then no batching is performed.
 *
 * @author Daniel Henrique Alves Lima
 * @author Paul King
 */
public class BatchingPreparedStatementWrapper extends BatchingStatementWrapper {

    private PreparedStatement delegate;
    private List<Tuple> indexPropList;
    private Sql sql;

    public BatchingPreparedStatementWrapper(PreparedStatement delegate, List<Tuple> indexPropList, int batchSize, Logger log, Sql sql) {
        super(delegate, batchSize, log);
        this.delegate = delegate;
        this.indexPropList = indexPropList;
        this.sql = sql;
    }

    public void addBatch(Object[] parameters) throws SQLException {
        addBatch(Arrays.asList(parameters));
    }

    public void addBatch(List<Object> parameters) throws SQLException {
        if (indexPropList != null) {
            sql.setParameters(sql.getUpdatedParams(parameters, indexPropList), delegate);
        } else {
            sql.setParameters(parameters, delegate);
        }
        delegate.addBatch();
        batchCount++;
        if (batchCount == batchSize /* never true for batchSize of 0 */) {
            int[] result = delegate.executeBatch();
            processResult(result);
            batchCount = 0;
        }
    }
}

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