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/**
* Copyright (C) 2011-2015 The XDocReport Team
*
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package fr.opensagres.xdocreport.template.velocity.internal;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.Writer;
import java.util.Map;
import java.util.Properties;
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.VelocityEngine;
import fr.opensagres.xdocreport.core.EncodingConstants;
import fr.opensagres.xdocreport.core.XDocReportException;
import fr.opensagres.xdocreport.core.io.IOUtils;
import fr.opensagres.xdocreport.template.AbstractTemplateEngine;
import fr.opensagres.xdocreport.template.FieldsExtractor;
import fr.opensagres.xdocreport.template.IContext;
import fr.opensagres.xdocreport.template.TemplateEngineKind;
import fr.opensagres.xdocreport.template.config.ITemplateEngineConfiguration;
import fr.opensagres.xdocreport.template.formatter.IDocumentFormatter;
import fr.opensagres.xdocreport.template.velocity.VelocityConstants;
import fr.opensagres.xdocreport.template.velocity.VelocityDocumentFormatter;
import fr.opensagres.xdocreport.template.velocity.VelocityFieldsExtractor;
/**
* Velocity template engine implementation.
*/
public class VelocityTemplateEngine
extends AbstractTemplateEngine
implements VelocityConstants
{
private static String ID = TemplateEngineKind.Velocity.name();
private VelocityDocumentFormatter formatter = new VelocityDocumentFormatter();
private VelocityEngine velocityEngine;
private final Properties velocityEngineProperties;
public VelocityTemplateEngine( Properties velocityEngineProperties )
{
this.velocityEngineProperties = velocityEngineProperties;
}
public String getKind()
{
return TemplateEngineKind.Velocity.name();
}
public String getId()
{
return ID;
}
public IContext createContext()
{
return new XDocVelocityContext();
}
public IContext createContext( Map contextMap )
{
return new XDocVelocityContext( contextMap );
}
@Override
protected void processWithCache( String templateName, IContext context, Writer writer )
throws XDocReportException, IOException
{
VelocityEngine velocityEngine = getVelocityEngine();
Template template = velocityEngine.getTemplate( templateName, EncodingConstants.UTF_8.name() );
if ( template != null )
{
template.merge( (VelocityContext) context, writer );
}
}
@Override
protected void processNoCache( String templateName, IContext context, Reader reader, Writer writer )
throws XDocReportException, IOException
{
VelocityEngine velocityEngine = getVelocityEngine();
velocityEngine.evaluate( (VelocityContext) context, writer, templateName, reader );
}
protected synchronized VelocityEngine getVelocityEngine()
throws XDocReportException
{
if ( velocityEngine == null )
{
velocityEngine = new VelocityEngine();
initializeVelocityEngine( velocityEngineProperties );
}
return velocityEngine;
}
public void initializeVelocityEngine( Properties velocityEngineProperties )
throws XDocReportException
{
ClassLoader backupCL = Thread.currentThread().getContextClassLoader();
Thread.currentThread().setContextClassLoader( VelocityTemplateEngine.class.getClassLoader() );
try
{
velocityEngine.setProperty( VELOCITY_TEMPLATE_ENGINE_KEY, this );
velocityEngine.init( velocityEngineProperties );
}
catch ( Exception e )
{
throw new XDocReportException( e );
}
Thread.currentThread().setContextClassLoader( backupCL );
}
@Override
public void setConfiguration( ITemplateEngineConfiguration configuration )
{
super.setConfiguration( configuration );
if ( configuration != null && configuration.escapeXML() )
{
velocityEngineProperties.setProperty( "eventhandler.referenceinsertion.class",
XDocReportEscapeReference.class.getName() );
}
}
public IDocumentFormatter getDocumentFormatter()
{
return formatter;
}
public void extractFields( Reader reader, String entryName, FieldsExtractor extractor )
throws XDocReportException
{
VelocityFieldsExtractor.getInstance().extractFields( reader, entryName, extractor );
}
public void process( String templateName, IContext context, Writer writer )
throws IOException, XDocReportException
{
// TODO : Improve it, cache the JavaMainDump.vm
templateName = templateName + ".vm";
Reader reader = new InputStreamReader( VelocityTemplateEngine.class.getResourceAsStream( templateName ) );
try
{
VelocityEngine velocityEngine = getVelocityEngine();
velocityEngine.evaluate( (VelocityContext) context, writer, "", reader );
}
finally
{
if ( reader != null )
{
IOUtils.closeQuietly( reader );
}
}
}
public boolean isFieldNameStartsWithUpperCase()
{
return false;
}
}
