/**
* Copyright (C) 2014 JBoss Inc
*
* 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 org.dashbuilder.dataset;
import java.text.DateFormat;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.text.SimpleDateFormat;
import java.util.List;
import javax.enterprise.context.ApplicationScoped;
import org.dashbuilder.dataset.ColumnType;
import org.dashbuilder.dataset.DataColumn;
import org.dashbuilder.dataset.DataSet;
public class DataSetFormatter {
protected String numberPattern = "#,##0.00";
protected String datePattern = "MM/dd/yy HH:mm";
protected transient DateFormat dateFormat;
protected transient DecimalFormat numberFormat;
public DataSetFormatter() {
DecimalFormatSymbols numberSymbols = new DecimalFormatSymbols();
numberSymbols.setGroupingSeparator(getNumberGroupSeparator());
numberSymbols.setDecimalSeparator(getNumberDecimalSeparator());
this.numberFormat = new DecimalFormat(numberPattern, numberSymbols);
this.dateFormat = new SimpleDateFormat(datePattern);
}
public char getNumberGroupSeparator() {
if (numberPattern.length() < 2) return ',';
else return numberPattern.charAt(1);
}
public char getNumberDecimalSeparator() {
if (numberPattern.length() < 6) return '.';
else return numberPattern.charAt(5);
}
public String formatValueAt(DataSet dataSet, int row, int col) {
Object val = dataSet.getValueAt(row, col);
DataColumn column = dataSet.getColumnByIndex(col);
if (ColumnType.DATE.equals(column.getColumnType())) {
return dateFormat.format(val);
}
if (ColumnType.NUMBER.equals(column.getColumnType())) {
return numberFormat.format(val);
}
return val.toString();
}
/**
* Get a string representation of this data set.
*/
public String formatDataSet(DataSet dataSet,
String rowBegin, String rowEnd, String rowSep,
String columnBegin, String columnEnd, String columnSep) {
StringBuilder sb = new StringBuilder();
List<DataColumn> columns = dataSet.getColumns();
for (int i=0; i<dataSet.getRowCount(); i++) {
if (i > 0) sb.append(rowSep);
sb.append(rowBegin);
for (int j=0; j<columns.size(); j++) {
if (j > 0) sb.append(columnSep);
sb.append(columnBegin);
sb.append(formatValueAt(dataSet, i, j));
sb.append(columnEnd);
}
sb.append(rowEnd);
}
return sb.toString();
}
}