/*

 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

package sun.awt.datatransfer;

import sun.awt.AppContext;

import sun.datatransfer.DesktopDatatransferService;

import java.awt.EventQueue;

import java.awt.datatransfer.DataFlavor;

import java.awt.datatransfer.FlavorMap;

import java.util.LinkedHashSet;

import java.util.function.Supplier;

/**

 * Provides desktop services to the datatransfer module according to

 * {@code DesktopDatatransferService} interface.

 *

 * @author Petr Pchelko

 * @since 1.9

 */

public class DesktopDatatransferServiceImpl implements DesktopDatatransferService {

    private static final Object FLAVOR_MAP_KEY = new Object();

    @Override

    public void invokeOnEventThread(Runnable r) {

        EventQueue.invokeLater(r);

    }

    @Override

    public String getDefaultUnicodeEncoding() {

        DataTransferer dataTransferer = DataTransferer.getInstance();

        if (dataTransferer != null) {

            return dataTransferer.getDefaultUnicodeEncoding();

        }

        return null;

    }

    @Override

    public FlavorMap getFlavorMap(Supplier<FlavorMap> supplier) {

        AppContext context = AppContext.getAppContext();

        FlavorMap fm = (FlavorMap) context.get(FLAVOR_MAP_KEY);

        if (fm == null) {

            fm = supplier.get();

            context.put(FLAVOR_MAP_KEY, fm);

        }

        return fm;

    }

    @Override

    public boolean isDesktopPresent() {

        return true;

    }

    @Override

    public LinkedHashSet<DataFlavor> getPlatformMappingsForNative(String nat) {

        DataTransferer instance = DataTransferer.getInstance();

        return instance != null ? instance.getPlatformMappingsForNative(nat) : new LinkedHashSet<>();

    }

    @Override

    public LinkedHashSet<String> getPlatformMappingsForFlavor(DataFlavor df) {

        DataTransferer instance = DataTransferer.getInstance();

        return instance != null ? instance.getPlatformMappingsForFlavor(df) : new LinkedHashSet<>();

    }

    @Override

    public void registerTextFlavorProperties(String nat, String charset, String eoln, String terminators) {

        DataTransferer instance = DataTransferer.getInstance();

        if (instance != null) {

            instance.registerTextFlavorProperties(nat, charset, eoln, terminators);

        }

    }

}