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'rapiddweller Common' is an open source Java library forked from Databene Commons 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 com.rapiddweller.common.ui.awt;

import com.rapiddweller.common.Assert;
import com.rapiddweller.common.SystemInfo;
import com.rapiddweller.common.ui.FileChooser;
import com.rapiddweller.common.ui.FileOperation;
import com.rapiddweller.common.ui.FileTypeSupport;

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

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

  private static final long serialVersionUID = -3217299586317875276L;

  /**
   * The Supported types.
   */
  FileTypeSupport supportedTypes;

  /**
   * Instantiates a new Awt file chooser.
   *
   * @param prompt         the prompt
   * @param operation      the operation
   * @param supportedTypes the supported types
   */
  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());
  }

}