package com.pdflib.cookbook.pcos.interactive;

import java.io.IOException;

import com.pdflib.pCOS;
import com.pdflib.pCOSException;
import com.pdflib.cookbook.pcos.pcos_cookbook_example;

/**
 * Extract XFA (XML Forms Architecture) data.
 * <p>
 * Required software: pCOS interface 3 (pCOS 2.x, PDFlib 7.x, TET 2.2,
 * PLOP 3.x)<br>
 * Required data: PDF document
 * 
 * @version $Id: xfa.java,v 1.2 2007/09/19 08:45:30 stm Exp $
 */
public class xfa extends pcos_cookbook_example {

    /* This is where the data files are. Adjust as necessary. */
    private final static String SEARCH_PATH = "../input";
    
    private final static String KEY = "/Root/AcroForm/XFA";

    public void example_code(pCOS p, String filename) throws pCOSException,
        Exception {
        
        /* Open the PDF document */
        int doc = p.open_document(filename, "");
        if (doc == -1)
            throw new Exception("Error: " + p.get_errmsg());

        System.out.println("File name: " + p.get_string(doc, "filename"));
        
        String objtype = p.get_string(doc, "type:" + KEY);
        
        if (objtype.equals("null")) {
            System.out.println("No XFA data found");
        }
        else if (objtype.equals("stream")) {
            System.out.println("XFA data is contained in a single stream");
            
            byte[] contents = p.get_stream(doc, "", KEY);
            write_xfa_data(contents);
        }
        else if (objtype.equals("array")) {
            int length = (int) p.get_number(doc, "length:" + KEY);
            
            System.out.println("XFA data is contained in "
                + (length / 2) + " separate streams");
            
            /*
             * every second entry in the array contains a portion of the
             * XFA data
             */
            for (int i = 1; i < length; i += 2) {
                byte[] contents = p.get_stream(doc, "", KEY + "[" + i + "]");
                write_xfa_data(contents);
            }
        }
        
        p.close_document(doc);
    }

    private void write_xfa_data(byte[] contents) {
        if (contents != null && contents.length > 0) {
            try {
                System.out.write(contents);
            }
            catch (IOException e) {
                System.err.println("IOException occurred:");
                System.err.println(e.getMessage());
            }
        }
    }

    public xfa(String[] argv, String readable_name, String search_path,
        String full_rcs_file_name, String revision) {
        super(argv, readable_name, search_path, full_rcs_file_name, revision);
    }

    public static void main(String[] argv) {
        xfa example = new xfa(argv, "XFA", SEARCH_PATH,
            "$RCSfile: xfa.java,v $", "$Revision: 1.2 $");
        example.execute();
    }
}