net.sf.jasperreports.renderers.util.SvgDataSniffer 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.renderers.util;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import org.apache.batik.anim.dom.SAXSVGDocumentFactory;
import org.apache.batik.bridge.UserAgent;
import org.apache.batik.dom.svg.SVGDocumentFactory;
import org.w3c.dom.svg.SVGDocument;
import net.sf.jasperreports.engine.JasperReportsContext;
import net.sf.jasperreports.renderers.BatikUserAgent;
/**
* Utility class that uses Batik to check if the provided byte data
* is a valid SVG image.
* It does this by attempting to parse the data into an SVG document.
*
* @author Teodor Danciu ([email protected])
*/
public class SvgDataSniffer
{
/**
*
*/
private final SVGDocumentFactory documentFactory;
/**
*
*/
private SvgDataSniffer(JasperReportsContext jasperReportsContext)
{
UserAgent userAgent = new BatikUserAgent(jasperReportsContext);
documentFactory =
new SAXSVGDocumentFactory(userAgent.getXMLParserClassName(), true);
documentFactory.setValidating(userAgent.isXMLParserValidating());
}
/**
*
*/
public static SvgDataSniffer getInstance(JasperReportsContext jasperReportsContext)
{
return new SvgDataSniffer(jasperReportsContext);
}
/**
*
*/
public boolean isSvgData(byte[] data)
{
return getSvgInfo(data) != null;
}
/**
*
*/
public SvgInfo getSvgInfo(byte[] data)
{
try
{
SVGDocument document =
documentFactory.createSVGDocument(
null,
new ByteArrayInputStream(data)
);
return new SvgInfo(document.getInputEncoding());
}
catch (IOException e)
{
return null;
}
}
/**
*
*/
public static final class SvgInfo
{
private final String encoding;
private SvgInfo(String encoding)
{
this.encoding = encoding;
}
public String getEncoding()
{
return encoding;
}
}
}