XFADocument.java

/*
 * GovWay - A customizable API Gateway 
 * https://govway.org
 * 
 * Copyright (c) 2005-2025 Link.it srl (https://link.it). 
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3, as published by
 * the Free Software Foundation.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
package org.openspcoop2.utils.pdf;

import java.io.ByteArrayOutputStream;

import org.apache.pdfbox.pdmodel.interactive.form.PDXFAResource;
import org.openspcoop2.utils.UtilsException;
import org.openspcoop2.utils.xml.XMLUtils;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;

/**
* XFADocument
*
* @author Andrea Poli (apoli@link.it)
* @author $Author$
* @version $Rev$, $Date$
*/
public class XFADocument {

    public static final String XFA_DATA_NAMESPACE = "http://www.xfa.org/schema/xfa-data/1.0/";
    public static final String XFA_DATASETS_LOCAL_NAME = "datasets";
    public static final String XFA_DATA_LOCAL_NAME = "data";
    
    public static byte[] addXfaDatasets(byte[] content) throws UtilsException {
        try {
            String xmlPrefix = "<xfa:"+XFA_DATASETS_LOCAL_NAME+" xmlns:xfa=\""+XFA_DATA_NAMESPACE+"\">\n"+
                    "<xfa:"+XFA_DATA_LOCAL_NAME+">\n";
            String xmlSuffix = "</xfa:"+XFA_DATA_LOCAL_NAME+">\n</xfa:"+XFA_DATASETS_LOCAL_NAME+">";
                
            ByteArrayOutputStream bout = null;
            bout = new ByteArrayOutputStream();
            bout.write(xmlPrefix.getBytes());
            bout.write(content);
            bout.write(xmlSuffix.getBytes());
            bout.flush();
            bout.close();   
            return bout.toByteArray();
        }catch(Exception e) {
            throw new UtilsException(e.getMessage(),e);
        }
    }
    
    private PDXFAResource xfa;
    private Document document;
    private byte[] content;
    
    public PDXFAResource getXfa() {
        return this.xfa;
    }
    public void setXfa(PDXFAResource xfa) {
        this.xfa = xfa;
    }
    public Document getDocument() {
        return this.document;
    }
    public void setDocument(Document document) {
        this.document = document;
    }
    public byte[] getContent() {
        return this.content;
    }
    public void setContent(byte[] content) {
        this.content = content;
    }
    
    public boolean isXfaDataContent() {
        Node n = this.getXfaDataContentNode();
        return n!=null;
    }
    public Node getXfaDataContentNode() {
        if(this.document!=null && this.document.getDocumentElement()!=null) {
            Element rootElement = this.document.getDocumentElement();
            if(XFA_DATA_NAMESPACE.equals(rootElement.getNamespaceURI()) && XFA_DATASETS_LOCAL_NAME.equals(rootElement.getLocalName())) {
                XMLUtils xmlUtils = XMLUtils.getInstance();
                Node nData = xmlUtils.getFirstNotEmptyChildNode(rootElement, false);
                if(XFA_DATA_NAMESPACE.equals(nData.getNamespaceURI()) && XFA_DATA_LOCAL_NAME.equals(nData.getLocalName())) {
                    return xmlUtils.getFirstNotEmptyChildNode(nData, false);
                }
            }
        }
        return null;
    }
    public byte[] getXfaDataContent() throws UtilsException {
        try {
            byte[] contentData = null;
            Node n = this.getXfaDataContentNode();
            if(n!=null) {
                XMLUtils xmlUtils = XMLUtils.getInstance();
                contentData = xmlUtils.toByteArray(n, true);
            }
            return contentData;
        }catch(Exception e) {
            throw new UtilsException(e.getMessage(),e);
        }
    }

}