Groovy example source code file (Preferences.java)

This example Groovy source code file (Preferences.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Groovy tags/keywords

backingstoreexception, backingstoreexception, editor, exception, illegalargumentexception, preferencechangeevent, preferencechangelistener, preferencechangelistener, preferences, preferences, store, store, string, string

The Groovy Preferences.java source code

/*
 * Copyright 2003-2007 the original author or authors.
 *
 * 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.codehaus.groovy.tools.shell.util;

import java.util.prefs.BackingStoreException;
import java.util.prefs.PreferenceChangeListener;
import java.util.prefs.PreferenceChangeEvent;

import org.codehaus.groovy.tools.shell.IO;

/**
 * Container for shell preferences.
 *
 * @version $Id: Preferences.java 12278 2008-05-04 12:00:38Z user57 $
 * @author <a href="mailto:jason@planet57.com">Jason Dillon
 */
public class Preferences
{
    private static final java.util.prefs.Preferences STORE = java.util.prefs.Preferences.userRoot().node("/org/codehaus/groovy/tools/shell");

    public static IO.Verbosity verbosity;

    static {
        String tmp = STORE.get("verbosity", IO.Verbosity.INFO.name);
        try {
            verbosity = IO.Verbosity.forName(tmp);
        }
        catch (IllegalArgumentException e) {
            verbosity = IO.Verbosity.INFO;
            STORE.remove("verbosity");
        }

        addChangeListener(new PreferenceChangeListener() {
            public void preferenceChange(final PreferenceChangeEvent event) {
                if (event.getKey().equals("verbosity")) {
                    String name = event.getNewValue();

                    if (name == null) {
                        name = IO.Verbosity.INFO.name;
                    }

                    try {
                        verbosity = IO.Verbosity.forName(name);
                    }
                    catch (Exception e) {
                        event.getNode().put(event.getKey(), verbosity.name);
                    }
                }
            }
        });
    }

    public static boolean getShowLastResult() {
        return STORE.getBoolean("show-last-result", true);
    }

    public static boolean getSanitizeStackTrace() {
        return STORE.getBoolean("sanitize-stack-trace", true);
    }

    public static String getEditor() {
        return STORE.get("editor", System.getenv("EDITOR"));
    }

    public static String getParserFlavor() {
        return STORE.get("parser-flavor", "rigid");
    }

    //
    // Store Access
    //
    
    public static String[] keys() throws BackingStoreException {
        return STORE.keys();
    }

    public static String get(final String name, final String defaultValue) {
        return STORE.get(name, defaultValue);
    }

    public static String get(final String name) {
        return get(name, null);
    }

    public static void put(final String name, final String value) {
        STORE.put(name, value);
    }

    public static void clear() throws BackingStoreException {
        STORE.clear();
    }

    public static void addChangeListener(final PreferenceChangeListener listener) {
        STORE.addPreferenceChangeListener(listener);
    }
}