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'databene commons' is an open source Java library by Volker Bergmann. It provides extensions to the Java core library by utility classes, abstract concepts and concrete implementations.

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/*
 * Copyright (C) 2004-2015 Volker Bergmann ([email protected]).
 * All rights reserved.
 *
 * 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.databene.commons.ui.awt;

import java.awt.Component;
import java.awt.FileDialog;
import java.awt.Frame;
import java.io.File;

import org.databene.commons.Assert;
import org.databene.commons.SystemInfo;
import org.databene.commons.ui.FileOperation;
import org.databene.commons.ui.FileTypeSupport;
import org.databene.commons.ui.FileChooser;

/**
 * AWT based implementation of the {@link FileChooser} interface.
 * Created at 14.12.2008 14:36:28
 * @since 0.5.13
 * @author Volker Bergmann
 */

public class AwtFileChooser extends FileDialog implements FileChooser {

	private static final long serialVersionUID = -3217299586317875276L;
	
	FileTypeSupport supportedTypes;
	
	public AwtFileChooser(String prompt, FileOperation operation, FileTypeSupport supportedTypes) {
		super((Frame) null, prompt, (operation == FileOperation.OPEN ? FileDialog.LOAD : FileDialog.SAVE));
		Assert.notNull(supportedTypes, "supportedTypes");
		Assert.notNull(operation, "operation");
		this.supportedTypes = supportedTypes;
	}

	@Override
	public File chooseFile(Component owner) {
		if (supportedTypes == FileTypeSupport.directoriesOnly)
				System.setProperty("apple.awt.fileDialogForDirectories", "true");
		setVisible(true);
		System.setProperty("apple.awt.fileDialogForDirectories", "false");
		return getSelectedFile();
	}

	@Override
	public void setCurrentDirectory(File currentDirectory) {
		if (currentDirectory == null)
			currentDirectory = new File(SystemInfo.getCurrentDir());
		setDirectory(currentDirectory.getAbsolutePath());
	}
	
	@Override
	public void setSelectedFile(File file) {
		setDirectory(file.getParent());
		setFile(file.getName());
	}

	@Override
	public File getSelectedFile() {
		if (getFile() == null)
			return null;
		return new File(getDirectory(), getFile());
	}

}