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Merge pull request #1390 from ashitsalesforce/master
refactor common code in CSV and Database readers
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src/main/java/com/salesforce/dataloader/dao/AbstractDataReaderImpl.java
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| /* | ||
| * Copyright (c) 2015, salesforce.com, inc. | ||
| * All rights reserved. | ||
| * | ||
| * Redistribution and use in source and binary forms, with or without modification, are permitted provided | ||
| * that the following conditions are met: | ||
| * | ||
| * Redistributions of source code must retain the above copyright notice, this list of conditions and the | ||
| * following disclaimer. | ||
| * | ||
| * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and | ||
| * the following disclaimer in the documentation and/or other materials provided with the distribution. | ||
| * | ||
| * Neither the name of salesforce.com, inc. nor the names of its contributors may be used to endorse or | ||
| * promote products derived from this software without specific prior written permission. | ||
| * | ||
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED | ||
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A | ||
| * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR | ||
| * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED | ||
| * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | ||
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | ||
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | ||
| * POSSIBILITY OF SUCH DAMAGE. | ||
| */ | ||
|
|
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| package com.salesforce.dataloader.dao; | ||
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| import java.util.List; | ||
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| import com.salesforce.dataloader.config.AppConfig; | ||
| import com.salesforce.dataloader.exception.DataAccessObjectException; | ||
| import com.salesforce.dataloader.exception.DataAccessObjectInitializationException; | ||
| import com.salesforce.dataloader.model.TableRow; | ||
| import com.salesforce.dataloader.util.DAORowUtil; | ||
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| public abstract class AbstractDataReaderImpl implements DataReader { | ||
| private AppConfig appConfig; | ||
| private DAORowCache rowCache = new DAORowCache(); | ||
| private int currentRowNumber; | ||
| private int totalRows = 0; | ||
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| public AbstractDataReaderImpl(AppConfig appConfig) { | ||
| this.appConfig = appConfig; | ||
| } | ||
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| public List<TableRow> readTableRowList(int maxRows) throws DataAccessObjectException { | ||
| List<TableRow> rowList = null; | ||
| if (this.rowCache.size() >= this.currentRowNumber + maxRows) { | ||
| rowList = this.rowCache.getRows(currentRowNumber, maxRows); | ||
| currentRowNumber = currentRowNumber + rowList.size(); | ||
| return rowList; | ||
| } else { | ||
| return readTableRowListFromDAO(maxRows); | ||
| } | ||
| } | ||
|
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| public void open() throws DataAccessObjectInitializationException{ | ||
| if (isOpenFlag()) { | ||
| close(); | ||
| } | ||
| if (!appConfig.getBoolean(AppConfig.PROP_PROCESS_BULK_CACHE_DATA_FROM_DAO) | ||
| || rowCache.size() == 0) { | ||
| openDAO(); | ||
| } | ||
| currentRowNumber = 0; | ||
| rowCache.resetCurrentRowIndex(); | ||
| setOpenFlag(true); | ||
| } | ||
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| public TableRow readTableRow() throws DataAccessObjectException { | ||
| if (!isOpenFlag()) { | ||
| open(); | ||
| } | ||
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| // look in the cache first | ||
| TableRow trow = rowCache.getCurrentRow(); | ||
| if (trow != null) { | ||
| currentRowNumber++; | ||
| return trow; | ||
| } | ||
| // not found in cache. Try from DAO. | ||
| trow = readTableRowFromDAO(); | ||
| if (trow == null) { | ||
| this.totalRows = currentRowNumber; | ||
| return null; | ||
| } | ||
| currentRowNumber++; | ||
| if (appConfig.getBoolean(AppConfig.PROP_PROCESS_BULK_CACHE_DATA_FROM_DAO)) { | ||
| rowCache.addRow(trow); | ||
| } | ||
| return trow; | ||
| } | ||
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| public int getCurrentRowNumber() { | ||
| return this.currentRowNumber; | ||
| } | ||
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| public int getTotalRows() throws DataAccessObjectException { | ||
| if (totalRows == 0) { | ||
| if (!isOpenFlag()) { | ||
| open(); | ||
| } | ||
| totalRows = DAORowUtil.calculateTotalRows(this); | ||
| } | ||
| return totalRows; | ||
| } | ||
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| protected AppConfig getAppConfig() { | ||
| return this.appConfig; | ||
| } | ||
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| abstract protected void setOpenFlag(boolean open); | ||
| abstract protected boolean isOpenFlag(); | ||
| abstract protected void openDAO() throws DataAccessObjectInitializationException; | ||
| abstract protected List<TableRow> readTableRowListFromDAO(int maxRows) throws DataAccessObjectException; | ||
| abstract protected TableRow readTableRowFromDAO() throws DataAccessObjectException; | ||
| } |
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