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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.document.preprocessor.sax;

import java.io.IOException;
import java.io.InputStream;
import java.io.Writer;
import java.util.Map;

import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.XMLReaderFactory;

import fr.opensagres.xdocreport.core.XDocReportException;
import fr.opensagres.xdocreport.core.io.IOUtils;
import fr.opensagres.xdocreport.core.io.XDocArchive;
import fr.opensagres.xdocreport.document.preprocessor.AbstractXDocPreprocessor;
import fr.opensagres.xdocreport.template.formatter.FieldsMetadata;
import fr.opensagres.xdocreport.template.formatter.IDocumentFormatter;

/**
 * SAX preprocessor to modify XML entry with SAX.
 */
public abstract class SAXXDocPreprocessor
    extends AbstractXDocPreprocessor
{

    @Override
    public boolean preprocess( String entryName, InputStream reader, Writer writer, FieldsMetadata fieldsMetadata,
                               IDocumentFormatter formatter, Map sharedContext )
        throws XDocReportException, IOException
    {
        try
        {
            XMLReader xmlReader = XMLReaderFactory.createXMLReader();
            BufferedDocumentContentHandler contentHandler =
                createBufferedDocumentContentHandler( entryName, fieldsMetadata, formatter, sharedContext );
            xmlReader.setContentHandler( contentHandler );
            xmlReader.parse( new InputSource( reader ) );
            BufferedDocument document = contentHandler.getBufferedDocument();
            if ( document != null )
            {
                document.save( writer );
//                 StringWriter s = new StringWriter();
//                 document.save( s );
//                 System.err.println( s );
                return true;
            }

            return false;
        }
        catch ( SAXException e )
        {
            throw new XDocReportException( e );
        }
    }

    @Override
    protected InputStream getSource( XDocArchive documentArchive, String entryName )
    {
        return documentArchive.getEntryInputStream( entryName );
    }

    @Override
    protected void closeSource( InputStream reader )
    {
        if ( reader != null )
        {
            IOUtils.closeQuietly( reader );
        }

    }

    protected abstract BufferedDocumentContentHandler createBufferedDocumentContentHandler( String entryName,
                                                                                               FieldsMetadata fieldsMetadata,
                                                                                               IDocumentFormatter formatter,
                                                                                               Map sharedContext );

}