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Free Java Reporting Library
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2019 TIBCO Software Inc. All rights reserved.
* http://www.jaspersoft.com
*
* Unless you have purchased a commercial license agreement from Jaspersoft,
* the following license terms apply:
*
* This program is part of JasperReports.
*
* JasperReports 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.
*
* JasperReports 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 JasperReports. If not, see .
*/
package net.sf.jasperreports.data.cache;
/**
* @author Lucian Chirita ([email protected])
*/
public class NumberValuesUtils
{
private static final NumberValuesUtils INSTANCE = new NumberValuesUtils();
public static NumberValuesUtils instance()
{
return INSTANCE;
}
// allow subclasses
protected NumberValuesUtils()
{
}
public ColumnValues toValues(int count, long[] values, ValueLength valueLength,
long linearFactor, long linearOffset)
{
ColumnValues colValues;
switch (valueLength) {
case BYTE:
// byte values
colValues = toByteValues(count, values, linearFactor, linearOffset);
break;
case SHORT:
// short values
colValues = toShortValues(count, values, linearFactor, linearOffset);
break;
case INT:
// int values
colValues = toIntValues(count, values, linearFactor, linearOffset);
break;
default:
colValues = toLongValues(count, values, linearFactor, linearOffset);
break;
}
return colValues;
}
protected ColumnValues toByteValues(int count, long[] values, long linearFactor, long linearOffset)
{
byte[] byteValues = new byte[count];
for (int i = 0; i < count; i++)
{
byteValues[i] = (byte) (values[i] & 0xFF);
}
return new ByteArrayValues(byteValues, linearFactor, linearOffset);
}
protected ColumnValues toShortValues(int count, long[] values, long linearFactor, long linearOffset)
{
short[] shortValues = new short[count];
for (int i = 0; i < count; i++)
{
shortValues[i] = (short) (values[i] & 0xFFFF);
}
return new ShortArrayValues(shortValues, linearFactor, linearOffset);
}
protected ColumnValues toIntValues(int count, long[] values, long linearFactor, long linearOffset)
{
int[] intValues = new int[count];
for (int i = 0; i < count; i++)
{
intValues[i] = (int) (values[i] & 0xFFFFFFFFL);
}
return new IntArrayValues(intValues, linearFactor, linearOffset);
}
protected ColumnValues toLongValues(int count, long[] values, long linearFactor, long linearOffset)
{
// always create a copy
long[] longValues = new long[count];
System.arraycopy(values, 0, longValues, 0, count);
return new LongArrayValues(longValues, linearFactor, linearOffset);
}
}