BridgeFacade.java

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package com.arcle.rmt.j2se.bridge;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;

import com.arcle.rmt.rqml.RQMLFirstClass;
import com.arcle.rmt.j2se.model.RQMLDocument;
import com.arcle.rmt.j2se.model.RQMLDocumentFacade;
import com.arcle.rmt.superwaba.model.Document;
import com.arcle.rmt.superwaba.model.DocumentManager;
import com.arcle.rmt.j2se.bridge.swexport.SwExportFacade;
import com.arcle.rmt.j2se.bridge.swimport.SwImportFacade;

public final class BridgeFacade {
    private BridgeFacade() {
        /* Notify superwaba class library that we're running on the desktop */
        //waba.applet.Applet.showMsgs = false;
        waba.applet.JavaBridge.showMsgs = false;
        waba.applet.JavaBridge.setNonGUIApp();
    }


    public RQMLDocument importSuperwabaDocument(File pdbFile, PrintWriter log)
            throws BridgeFacadeException {
        Document swDoc = null;
        RQMLDocument desktopDoc = null;
        try {
            swDoc = openSuperwabaDocument(pdbFile);
            desktopDoc = RQMLDocumentFacade.getInstance().createRQMLDocument();
            pumpElements(swDoc, desktopDoc, log);
        } catch(Exception e) {
            rethrowException(e);
        }
        return desktopDoc;
    }

    public void exportSuperwabaDocument(RQMLDocument desktopDoc, File pdbFile,
            PrintWriter log) throws BridgeFacadeException {
        Document swDoc = null;
        try {
            swDoc = DocumentManager.getInstance().createDocument();

            swDoc.setTitle(stripPDBSuffix(pdbFile.getName()));
            pumpElements(desktopDoc, swDoc, log);
            DocumentManager.getInstance().saveDocument(
                makeCatalogFileName(pdbFile), swDoc);
        } catch(Exception e) {
            rethrowException(e);
        }
    }

    //-----------------------------------------------------------------------
    // protected methods

    protected Document openSuperwabaDocument(File pdbFile) throws IOException {
        DocumentManager dm = DocumentManager.getInstance();
        Document doc = dm.loadDocument(makeCatalogFileName(pdbFile));
        if (doc == null) {
            throw new IOException("Cannot open Catalog: " + pdbFile);
        }
        return doc;
    }

    protected void pumpElements(Document source, RQMLDocument destination, PrintWriter log) {
        SwImportFacade.getInstance().importFirstClass(source, destination, log);
    }

    protected int pumpElements(RQMLDocument source, Document destination,
            PrintWriter log) {
        int exportedElements = 0;
        SwExportFacade facade = SwExportFacade.getInstance();
        Iterator elements = source.getElements();

        while (elements.hasNext()) {
            RQMLFirstClass elem = (RQMLFirstClass) elements.next();
            if (facade.export(elem, destination)) {
                exportedElements++;
            } else {
                log.println("Export failed for element: " + elem);
            }
        }
        return exportedElements;
    }


    protected String makeCatalogFileName(File file) throws IOException {
        return stripPDBSuffix(file.getCanonicalPath());
    }

    protected String stripPDBSuffix(String str) {
        final String EXTENSION = "pdb";
        int extIndex = str.lastIndexOf('.');
        if (extIndex >= 0) {
            // PDB extension?
            if (EXTENSION.equalsIgnoreCase(str.substring(extIndex+1))) {
                str = str.substring(0, extIndex);
            }
        }
        return str;
    }



    protected void rethrowException(Exception real)
            throws BridgeFacadeException {
        throw new BridgeFacadeException(real);
    }

    public synchronized static BridgeFacade getInstance() {
        if (_instance == null) {
            _instance = new BridgeFacade();
        }
        return _instance;
    }

    private static BridgeFacade _instance = null;
}

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