AppSettings.java

/*
 * Copyright 2015 Sudipto Chandra.
 *
 * 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.sandsoft.cymric.util;

import org.sandsoft.cymric.Cymric;
import java.io.File;
import java.util.prefs.Preferences;

/**
 * Contains various preference data. All data are stored in default preference
 * storage.
 *
 * @author Sudipto Chandra
 */
public class AppSettings {

    //prefernces data
    private final Preferences mPreference;

    /**
     * Creates a new AppSettings with default preference path.
     */
    public AppSettings() {
        mPreference = Preferences.userRoot().node(Cymric.DEFAULT_SETTINGS);
    }

    /**
     * Creates a new AppSettings and returns it.
     *
     * @return AppSettings object to get or set preferences.
     */
    public static AppSettings defaultSettings() {
        return new AppSettings();
    }

    /**
     * Gets the current preferences object.
     *
     * @return Current preferences object.
     */
    public Preferences getPreference() {
        return mPreference;
    }

    /**
     * Sets the current working directory.
     *
     * @param path Full directory path.
     */
    public void setWorkingPath(String path) {
        mPreference.put("Working Path", path);
    }

    /**
     * Sets the current working directory.
     *
     * @return Full directory path if valid, null otherwise.
     */
    public String getWorkingPath() {
        String path = mPreference.get("Working Path", null);
        if (isWorkingPathValid(path)) {
            return path;
        } else {
            return null;
        }
    }

    /**
     * Checks whether the working directory specified is valid.
     *
     * @param path Full directory path
     * @return True if valid, false otherwise.
     */
    private boolean isWorkingPathValid(String path) {
        if (path == null || path.isEmpty()) {
            return false;
        }

        File file = new File(path);
        return (file.exists() && file.isDirectory());
    }
}