DocumentManagerImpl.java

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package com.arcle.rmt.superwaba.model.imp;

import waba.sys.Settings;
import waba.sys.Convert;
import waba.io.Catalog;
import superwaba.ext.xplat.io.ObjectCatalog;
import superwaba.ext.xplat.io.Storable;
import com.arcle.rmt.superwaba.model.DocumentFactory;
import com.arcle.rmt.superwaba.model.Document;
import com.arcle.rmt.superwaba.model.DocumentManager;


public class DocumentManagerImpl extends DocumentManager {
    public DocumentManagerImpl() {
    }


    //-----------------------------------------------------------------------
    // DocumentManager implementations

    public Document loadDocument(String name) {
        ObjectCatalog cat = createObjectCatalog(name, ObjectCatalog.READ_ONLY);

        DocumentImpl doc = (DocumentImpl) createDocument();
        GenericMemento memento = doc.createMemento();
        cat.registerClass(memento);
        boolean loaded = cat.loadObjectAt(memento, 0);
        cat.close();
        if (loaded) {
            doc.setMemento(memento);
            return doc;
        }

        return null;
    }

    public void saveDocument(String name, Document doc) {

        if (!doc.isDeleted()) {
            ObjectCatalog cat = createObjectCatalog(name, ObjectCatalog.CREATE);
            // save document
            GenericMemento memento = ((DocumentImpl)doc).createMemento();
            cat.insertObjectAt(memento, 0);
            cat.close();
        } else {
            Catalog cat  = new Catalog(makeCatalogName(name), Catalog.WRITE_ONLY);
            if (cat.isOpen()) {
                cat.delete();                 // delete document
                cat.close();
            }
        }

    }

    public boolean deleteDocument(String name) {
        ObjectCatalog cat = createObjectCatalog(name, ObjectCatalog.READ_WRITE);
        return cat.delete();
    }


    public String[] listDocuments() {
        String[] catList = ObjectCatalog.listCatalogs(
            Convert.chars2int(getCreatorID()),
            Convert.chars2int(DOCUMENT_TYPE)
        );
        if (catList != null ) {
            /*
            listCatalogs return an array in the form
            <var>DocumentName.CreatorID.Type</var>. So, use only
            the first part of the string, stripping CreatorID and Type.
            */
            String[] documentList =  new String[catList.length];

            for (int i=0; i<documentList.length; i++) {
                documentList[i] = Convert.tokenizeString(
                    catList[i],
                    '.'
                )[0];
            }
            return documentList;
        } else {
            return null;
        }
    }


    public Document createDocument() {
        return new DocumentImpl();
    }

    //-----------------------------------------------------------------------
    // Factory Methods

    protected ObjectCatalog createObjectCatalog(String baseName, int mode) {
        String catName = makeCatalogName(baseName);
        ObjectCatalog cat = new ObjectCatalog(catName, mode);
        cat.resetSearch();
        return cat;
    }

    //-----------------------------------------------------------------------
    // Protected Methods

    protected String getCreatorID() {
        String crtr = Settings.appCreatorId;
        if (crtr == null) {
            crtr = CREATOR_ID;
        }
        return crtr;
    }

    protected String makeCatalogName(String baseName) {
        return baseName + "." + getCreatorID() + "." + DOCUMENT_TYPE;
    }


    //-----------------------------------------------------------------------
    // Constants

}

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