cherry.parser.worksheet.SheetBasedParser.java Source code

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Here is the source code for cherry.parser.worksheet.SheetBasedParser.java

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/*
 * Copyright 2014 agwlvssainokuni
 *
 * 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 cherry.parser.worksheet;

import static cherry.parser.worksheet.CellUtil.getCellValueAsString;

import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;

import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;

public class SheetBasedParser implements WorkbookParser {

    @Override
    public List<TypeDef> parse(Workbook workbook) {
        List<TypeDef> list = new LinkedList<TypeDef>();
        int numOfSheets = workbook.getNumberOfSheets();
        for (int i = 0; i < numOfSheets; i++) {
            Sheet sheet = workbook.getSheetAt(i);
            TypeDef typeDef = parseSheet(sheet);
            if (typeDef != null) {
                list.add(typeDef);
            }
        }
        return list;
    }

    private enum State {
        HEAD, ITEM
    }

    private TypeDef parseSheet(Sheet sheet) {

        State state = State.HEAD;
        int coldefFirstCellNum = -1;
        Map<Integer, String> coldef = new TreeMap<Integer, String>();

        TypeDef typeDef = new TypeDef();
        typeDef.setSheetName(sheet.getSheetName());
        for (Row row : sheet) {

            int firstCellNum = row.getFirstCellNum();
            if (firstCellNum < 0) {
                continue;
            }

            if (state == State.HEAD) {

                String directive = getCellValueAsString(row.getCell(firstCellNum));
                if ("##FQCN".equals(directive)) {

                    String fqcn = getCellValueAsString(row.getCell(firstCellNum + 1));
                    typeDef.setFullyQualifiedClassName(fqcn);
                } else if ("##ATTR".equals(directive)) {

                    String key = getCellValueAsString(row.getCell(firstCellNum + 1));
                    String value = getCellValueAsString(row.getCell(firstCellNum + 2));
                    typeDef.put(key, value);
                } else if ("##COLDEF".equals(directive)) {

                    for (Cell cell : row) {
                        if (cell.getColumnIndex() == firstCellNum) {
                            continue;
                        }
                        if (cell.getCellType() != Cell.CELL_TYPE_STRING) {
                            continue;
                        }
                        coldef.put(cell.getColumnIndex(), getCellValueAsString(cell));
                    }

                    coldefFirstCellNum = firstCellNum;
                    state = State.ITEM;
                } else {
                    // IGNORE UNKNOWN DIRECTIVES
                }
            } else if (state == State.ITEM) {

                ItemDef item = null;
                for (Cell cell : row) {

                    if (cell.getColumnIndex() == coldefFirstCellNum) {
                        item = new ItemDef();
                        continue;
                    }
                    if (item == null) {
                        continue;
                    }
                    String key = coldef.get(cell.getColumnIndex());
                    if (key == null) {
                        continue;
                    }

                    String value = getCellValueAsString(cell);
                    if (value != null) {
                        item.put(key, value);
                    }
                }

                if (item != null) {
                    typeDef.getItemDef().add(item);
                }
            } else {
                // IGNORE UNKNOWN STATE
            }
        }

        return typeDef;
    }

}