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/*  Copyright 1999-2015 Vince Via [email protected]
    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 com.viaoa.jfc.dnd;

import java.awt.*;
import java.awt.dnd.*;
import java.awt.datatransfer.*;
import java.awt.event.*;
import java.util.Vector;
import java.lang.reflect.*;
import java.io.IOException;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;
import com.viaoa.hub.*;

/** 
     Used to allow any OAObject or Hub Collection the ability to support Drag and Drop.
     OA gui components OATree, OAList, OATable use this to wrap objects that are 
     Dragged or Dropped.
*/
public class OATransferable implements Transferable {
    protected Hub hub;
    protected Object object;
    protected Class clazz;


    /** 
        Create new DND Data Flavor that supports Hub.
    */
    public static DataFlavor HUB_FLAVOR = new DataFlavor(Hub.class, "TransferableHub") {
        public boolean isFlavorSerializedObjectType() {
            return false; //was true - if true then a DND will serialize the Hub, which will create a new Hub     
        }
    };

    /** 
        Create new DND Data Flavor that supports OAObject.
    */
    public static DataFlavor OAOBJECT_FLAVOR = new DataFlavor(Object.class, "TransferableOAObject") {
        public boolean isFlavorSerializedObjectType() {
            return false; //was: true;   
        }
    };

    
    static final DataFlavor[] flavors = { HUB_FLAVOR, OAOBJECT_FLAVOR };

    /**
        Creates a new transferable object to wrap a Hub or OAObject.
    */
    public OATransferable(Hub hub, Object obj) {
        this.hub = hub;
        this.object = obj;
    }
    
    /**
        Returns DataFlavors for the Hub and OAObject
    */
    public DataFlavor[] getTransferDataFlavors() {
        return flavors;
    }

    /** 
        Returns the object that is transferable, Hub or Object (OAObject).
    */
    public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException, IOException {
        if (flavor.equals(HUB_FLAVOR)) return hub;
        return object;
    }

    /**
        Returns true if flave if for the Hub or OAObject Flavor.
    */
    public boolean isDataFlavorSupported(DataFlavor flavor) {
        if (flavor.equals(HUB_FLAVOR)) return true;
        if (flavor.equals(OAOBJECT_FLAVOR)) return true;
        return false;
    }
    
}