ru.sbtqa.monte.media.gui.datatransfer.CompositeTransferable Maven / Gradle / Ivy

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/* @(#)CompositeTransferable.java
 * Copyright © 2001 Werner Randelshofer, Switzerland.
 * You may only use this software in accordance with the license terms.
 */
package ru.sbtqa.monte.media.gui.datatransfer;

import java.awt.datatransfer.*;
import java.io.*;
import java.util.*;

/**
 *
 *
 * @author Werner Randelshofer
 * @version $Id: CompositeTransferable.java 364 2016-11-09 19:54:25Z werner $
 */
public class CompositeTransferable implements java.awt.datatransfer.Transferable {

    private HashMap transferables = new HashMap();
    private LinkedList flavors = new LinkedList();

    /**
     * Creates a new instance of CompositeTransferable
     */
    public CompositeTransferable() {
    }

    public void add(Transferable t) {
        DataFlavor[] f = t.getTransferDataFlavors();
        for (int i = 0; i < f.length; i++) {
            if (!transferables.containsKey(f[i])) {
                flavors.add(f[i]);
            }
            transferables.put(f[i], t);

        }
    }

    /**
     * Returns an object which represents the data to be transferred. The class
     * of the object returned is defined by the representation class of the
     * flavor.
     *
     * @param flavor the requested flavor for the data
     * @return TODO
     * @see DataFlavor#getRepresentationClass
     * @exception IOException if the data is no longer available in the
     * requested flavor.
     * @exception UnsupportedFlavorException if the requested data flavor is not
     * supported.
     */
    @Override
    public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException, IOException {
        Transferable t = transferables.get(flavor);
        if (t == null) {
            throw new UnsupportedFlavorException(flavor);
        }
        return t.getTransferData(flavor);
    }

    /**
     * Returns an array of DataFlavor objects indicating the flavors the data
     * can be provided in. The array should be ordered according to preference
     * for providing the data (from most richly descriptive to least
     * descriptive).
     *
     * @return an array of data flavors in which this data can be transferred
     */
    @Override
    public DataFlavor[] getTransferDataFlavors() {
        return flavors.toArray(new DataFlavor[transferables.size()]);
    }

    /**
     * Returns whether or not the specified data flavor is supported for this
     * object.
     *
     * @param flavor the requested flavor for the data
     * @return boolean indicating wjether or not the data flavor is supported
     */
    @Override
    public boolean isDataFlavorSupported(DataFlavor flavor) {
        return transferables.containsKey(flavor);
    }
}