AbstractCellRangeResolver.java

/**
 * Copyright (C) 2012 alanhay <alanhay99@hotmail.com>
 *
 * 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 uk.co.certait.htmlexporter.ss;

import org.apache.commons.lang.StringUtils;
import org.apache.poi.ss.util.CellReference;

public abstract class AbstractCellRangeResolver implements CellRangeResolver {
	public String getRangeString(CellRange range) {
		String rangeString;

		if (range.isContiguous()) {
			rangeString = buildContiguousString(range);
		} else {
			rangeString = buildNonContigousString(range);
		}

		return rangeString;
	}

	private String buildContiguousString(CellRange range) {
		TableCellReference firstCell = range.getFirstCell();
		CellReference first = new CellReference(firstCell.getRowIndex(), firstCell.getColumnIndex());

		TableCellReference lastCell = range.getLastCell();
		CellReference last = new CellReference(lastCell.getRowIndex(), lastCell.getColumnIndex());

		return first.formatAsString() + ":" + last.formatAsString();
	}

	private String buildNonContigousString(CellRange range) {
		StringBuilder builder = new StringBuilder();

		for (CellRangeRow row : range.getRows()) {
			for (TableCellReference cell : row.getCells()) {
				if (cell != null) {
					builder.append(new CellReference(cell.getRowIndex(), cell.getColumnIndex()).formatAsString())
							.append(getCellSeparator());
				}
			}
		}

		return StringUtils.removeEnd(builder.toString(), getCellSeparator());
	}

	public abstract String getCellSeparator();
}