net.sf.jasperreports.export.CompositeExporterConfigurationFactory 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 - 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.export;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.ArrayList;
import java.util.List;
import net.sf.jasperreports.engine.JRPropertiesUtil;
import net.sf.jasperreports.engine.JasperReportsContext;
import net.sf.jasperreports.engine.util.ClassUtils;
/**
* @author Teodor Danciu ([email protected])
*/
public class CompositeExporterConfigurationFactory
{
/**
*
*/
private final JRPropertiesUtil propertiesUtil;
private final Class configurationInterface;
/**
*
*/
public CompositeExporterConfigurationFactory(JasperReportsContext jasperReportsContext, Class configurationInterface)
{
this.propertiesUtil = JRPropertiesUtil.getInstance(jasperReportsContext);
this.configurationInterface = configurationInterface;
}
/**
*
*/
public C getConfiguration(final C parent, final C child)
{
if (parent == null)
{
return child;
}
else
{
boolean isOverrideHints =
parent.isOverrideHints() == null
? propertiesUtil.getBooleanProperty(ExporterConfiguration.PROPERTY_EXPORT_CONFIGURATION_OVERRIDE_REPORT_HINTS)
: parent.isOverrideHints();
return getConfiguration(parent, child, isOverrideHints);
}
}
/**
*
*/
public C getConfiguration(final C parent, final C child, boolean isOverrideHints)
{
if (parent == null)
{
return child;
}
else
{
if (isOverrideHints)
{
return getProxy(configurationInterface, new DelegateInvocationHandler(child, parent));
}
else
{
return getProxy(configurationInterface, new DelegateInvocationHandler(parent, child));
}
}
}
/**
*
*/
private final C getProxy(Class clazz, InvocationHandler handler)
{
List> allInterfaces = new ArrayList>();
if (clazz.isInterface())
{
allInterfaces.add(clazz);
}
else
{
List> lcInterfaces = ClassUtils.getInterfaces(clazz);
allInterfaces.addAll(lcInterfaces);
}
@SuppressWarnings("unchecked")
C composite =
(C)Proxy.newProxyInstance(
ExporterConfiguration.class.getClassLoader(),
allInterfaces.toArray(new Class[allInterfaces.size()]),
handler
);
return composite;
}
/**
*
*/
class DelegateInvocationHandler implements InvocationHandler
{
private final C parent;
private final C child;
/**
*
*/
public DelegateInvocationHandler(final C parent, final C child)
{
this.parent = parent;
this.child = child;
}
@Override
public Object invoke(
Object proxy,
Method method,
Object[] args
) throws Throwable
{
Object value = child == null ? null : method.invoke(child, args);
if (value == null)
{
value = parent == null ? null : method.invoke(parent, args);
}
return value;
}
}
}