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DynamicReports is an open source Java reporting library based on JasperReports. It allows to create dynamic report designs and it doesn't need a visual report designer.
You can very quickly create reports and produce documents that can be displayed, printed or exported into many popular formats such as PDF, Excel, Word and others.
/**
* DynamicReports - Free Java reporting library for creating reports dynamically
*
* Copyright (C) 2010 - 2016 Ricardo Mariaca
* http://www.dynamicreports.org
*
* This file is part of DynamicReports.
*
* DynamicReports is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* DynamicReports is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with DynamicReports. If not, see .
*/
package net.sf.dynamicreports.report;
import java.lang.reflect.ParameterizedType;
import net.sf.dynamicreports.report.constant.Calculation;
/**
* @author Ricardo Mariaca ([email protected])
*/
public class ReportUtils {
private static int counter = 0;
public static String generateUniqueName(String name) {
if (counter == Integer.MAX_VALUE) {
counter = 0;
}
return name + "_" + counter++ + "_";
}
public static Class getVariableValueClass(Calculation calculation, Class valueClass) {
if (calculation.equals(Calculation.COUNT) || calculation.equals(Calculation.DISTINCT_COUNT)) {
return Long.class;
}
if (calculation.equals(Calculation.AVERAGE) || calculation.equals(Calculation.STANDARD_DEVIATION) ||
calculation.equals(Calculation.VARIANCE)) {
return Number.class;
}
return valueClass;
}
public static Class getGenericClass(Object object, int index) {
ParameterizedType genericSuperclass = getParameterizedType(object.getClass());
if (genericSuperclass == null) {
return String.class;
}
Class rawType = getRawType(genericSuperclass.getActualTypeArguments()[index]);
if (rawType == null) {
return String.class;
}
return rawType;
}
private static ParameterizedType getParameterizedType(Class classs) {
if (classs == null) {
return null;
}
if (classs.getGenericSuperclass() instanceof ParameterizedType) {
return (ParameterizedType) classs.getGenericSuperclass();
}
return getParameterizedType((Class) classs.getGenericSuperclass());
}
private static Class getRawType(Object typeArgument) {
if (typeArgument instanceof ParameterizedType) {
return getRawType(((ParameterizedType) typeArgument).getRawType());
} else {
if (typeArgument instanceof Class) {
return (Class) typeArgument;
}
else {
return null;
}
}
}
}