com.feilong.excel.reader.BlockReaderLoopBreaker Maven / Gradle / Ivy
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feilong is a suite of core and expanded libraries that include utility classes, http, excel,cvs, io classes, and much much more.
/*
* Copyright (C) 2008 feilong
*
* 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 com.feilong.excel.reader;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellType;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import com.feilong.excel.definition.LoopBreakCondition;
class BlockReaderLoopBreaker{
/** Don't let anyone instantiate this class. */
private BlockReaderLoopBreaker(){
//AssertionError不是必须的. 但它可以避免不小心在类的内部调用构造器. 保证该类在任何情况下都不会被实例化.
//see 《Effective Java》 2nd
throw new AssertionError("No " + getClass().getName() + " instances for you!");
}
//---------------------------------------------------------------
/**
* Check break.
*
* @param sheet
* the sheet
* @param rowIndex
* the row
* @param columnIndex
* the col
* @param loopBreakCondition
* the condition
* @return true, if successful
*/
static boolean checkBreak(Sheet sheet,int rowIndex,int columnIndex,LoopBreakCondition loopBreakCondition){
//no break condition defined
if (sheet.getLastRowNum() < rowIndex){
return true;
}
//---------------------------------------------------------------
if (loopBreakCondition != null){
Row row = sheet.getRow(rowIndex + loopBreakCondition.getRowOffset());
if (row == null){
return false;
}
//---------------------------------------------------------------
Cell cell = row.getCell(columnIndex + loopBreakCondition.getColOffset());
if (cell == null || cell.getCellType() != CellType.STRING){
return false;
}
if (loopBreakCondition.getFlagString().equals(cell.getRichStringCellValue().getString())){
return true;
}
}
return false;
}
}