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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.engine.virtualization;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import net.sf.jasperreports.engine.JRRuntimeException;
/**
* @author Lucian Chirita ([email protected])
*/
public class SerializationUtils
{
public static final String EXCEPTION_MESSAGE_KEY_INVALID_INT_BYTE_READ = "engine.virtualization.utils.invalid.int.byte.read";
public static void writeIntCompressed(ObjectOutput out, int value)
throws IOException
{
if ((value & 0xFFFFFF80) == 0)
{
out.writeByte(value);
return;
}
if ((value & 0xFFFFC000) == 0)
{
out.writeByte((value >>> 8) | 0x80);
out.writeByte(value);
return;
}
if ((value & 0xFFE00000) == 0)
{
out.writeByte((value >>> 16) | 0xC0);
out.writeByte(value >>> 8);
out.writeByte(value);
return;
}
if ((value & 0xF0000000) == 0)
{
out.writeByte((value >>> 24) | 0xE0);
out.writeByte(value >>> 16);
out.writeByte(value >>> 8);
out.writeByte(value);
return;
}
out.writeByte(0xF0);
out.writeByte(value >>> 24);
out.writeByte(value >>> 16);
out.writeByte(value >>> 8);
out.writeByte(value);
}
public static int readIntCompressed(ObjectInput in) throws IOException
{
int b1 = in.readUnsignedByte();
if ((b1 & 0x80) == 0)
{
return b1;
}
if ((b1 & 0xC0) == 0x80)
{
int b2 = in.readUnsignedByte();
return ((b1 & 0x3F) << 8) | b2;
}
if ((b1 & 0xE0) == 0xC0)
{
int b2 = in.readUnsignedByte();
int b3 = in.readUnsignedByte();
return ((b1 & 0x1F) << 16) | (b2 << 8) | b3;
}
if ((b1 & 0xF0) == 0xE0)
{
int b2 = in.readUnsignedByte();
int b3 = in.readUnsignedByte();
int b4 = in.readUnsignedByte();
return ((b1 & 0x0F) << 24) | (b2 << 16) | (b3 << 8) | b4;
}
if (b1 != 0xF0)
{
// should not happen
throw
new JRRuntimeException(
EXCEPTION_MESSAGE_KEY_INVALID_INT_BYTE_READ,
new Object[]{Integer.toHexString(b1)});
}
int b2 = in.readUnsignedByte();
int b3 = in.readUnsignedByte();
int b4 = in.readUnsignedByte();
int b5 = in.readUnsignedByte();
return (b2 << 24) | (b3 << 16) | (b4 << 8) | b5;
}
}