ArticleListTransferHandler.java

/**
 * Copyright 1999-2009 The Pegadi Team
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.pegadi.storysketch.views;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.swing.*;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;

public class ArticleListTransferHandler extends TransferHandler {

    DataFlavor rdfFlavor;

    private final Logger log = LoggerFactory.getLogger(getClass());

    String localRDFItemType = DataFlavor.javaJVMLocalObjectMimeType +
        ";class=pegadi.storysketch.views.RDFItem";

    public ArticleListTransferHandler() {
        try {
            rdfFlavor = new DataFlavor(localRDFItemType);
        } catch (ClassNotFoundException e) {
            log.error("RDFTransferHandler: unable to create data flavor", e);
        }
    }


    public boolean canImport(JComponent c, DataFlavor[] flavors) {
        return true;
    }


    public boolean importData(JComponent c, Transferable t) {


        if (canImport(c, t.getTransferDataFlavors())) {


            if(c instanceof RDFTable) {

                RDFTable table = (RDFTable) c;
                RDFTableModel model = (RDFTableModel) table.getModel();

                try {
                    RDFItem item  = (RDFItem)t.getTransferData(rdfFlavor);

                    if(!model.contains(item)) {
                        model.addItem(item);
                        return true;
                    } else {
                        return false;
                    }
                } catch (UnsupportedFlavorException ufe) {
                    log.error("importData: unsupported data flavor", ufe);
                } catch (java.io.IOException ioe) {
                    log.error("importData: I/O exception", ioe);
                }
            }
        }
        return false;
    }

}