net.sf.jasperreports.engine.util.LocalVirtualizationSerializer Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jasperreports Show documentation
Show all versions of jasperreports Show documentation
Free Java Reporting Library
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2023 Cloud Software Group, 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.util;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectStreamClass;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import net.sf.jasperreports.engine.fill.JRAbstractLRUVirtualizer;
import net.sf.jasperreports.engine.fill.JRVirtualizationContext;
import net.sf.jasperreports.engine.virtualization.LocalVirtualizationInput;
import net.sf.jasperreports.engine.virtualization.LocalVirtualizationOutput;
import net.sf.jasperreports.engine.virtualization.VirtualizationInput;
import net.sf.jasperreports.engine.virtualization.VirtualizationOutput;
/**
* @author Lucian Chirita ([email protected])
*/
public class LocalVirtualizationSerializer extends VirtualizationSerializer
{
protected static final int CLASSLOADER_IDX_NOT_SET = -1;
protected static boolean isAncestorClassLoader(ClassLoader loader)
{
for (
ClassLoader ancestor = JRAbstractLRUVirtualizer.class.getClassLoader();
ancestor != null;
ancestor = ancestor.getParent())
{
if (ancestor.equals(loader))
{
return true;
}
}
return false;
}
protected final Map classLoadersIndexes = new HashMap<>();
protected final List classLoadersList = new ArrayList<>();
protected final Map, Integer> classIndexes = new HashMap<>();
protected final List> classes = new ArrayList<>();
public LocalVirtualizationSerializer()
{
}
public int getClassloaderIdx(Class clazz)
{
ClassLoader classLoader = clazz.getClassLoader();
int loaderIdx;
if (clazz.isPrimitive()
|| classLoader == null
|| isAncestorClassLoader(classLoader))
{
loaderIdx = CLASSLOADER_IDX_NOT_SET;
}
else
{
Integer idx = classLoadersIndexes.get(classLoader);
if (idx == null)
{
idx = classLoadersList.size();
classLoadersIndexes.put(classLoader, idx);
classLoadersList.add(classLoader);
}
loaderIdx = idx;
}
return loaderIdx;
}
public Class resolveClass(ObjectStreamClass desc, int loaderIdx) throws ClassNotFoundException
{
if (loaderIdx == CLASSLOADER_IDX_NOT_SET)
{
return null;
}
ClassLoader loader = classLoadersList.get(loaderIdx);
Class clazz = Class.forName(desc.getName(), false, loader);
return clazz;
}
public int getClassDescriptorIdx(Class clazz)
{
Integer classIdx = classIndexes.get(clazz);
if (classIdx == null)
{
classIdx = classIndexes.size();
classIndexes.put(clazz, classIdx);
classes.add(clazz);
}
return classIdx;
}
public Class getClassForDescriptorIdx(int descriptorIdx)
{
return classes.get(descriptorIdx);
}
protected VirtualizationOutput createOutput(JRVirtualizationContext context, OutputStream out) throws IOException
{
return new LocalVirtualizationOutput(out, this, context);
}
protected VirtualizationInput createInput(JRVirtualizationContext context, InputStream in) throws IOException
{
return new LocalVirtualizationInput(in, this, context);
}
}