152 lines
4.6 KiB
Java
152 lines
4.6 KiB
Java
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package net.sourceforge.guacamole;
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/*
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* Guacamole - Clientless Remote Desktop
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* Copyright (C) 2010 Michael Jumper
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.Properties;
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public class GuacamoleProperties {
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private static final Properties properties;
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private static GuacamoleException exception;
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static {
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properties = new Properties();
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try {
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InputStream stream = GuacamoleProperties.class.getResourceAsStream("/guacamole.properties");
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if (stream == null)
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throw new IOException("Resource /guacamole.properties not found.");
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properties.load(stream);
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}
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catch (IOException e) {
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exception = new GuacamoleException("Error reading guacamole.properties", e);
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}
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}
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public static String getProperty(String name) throws GuacamoleException {
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if (exception != null) throw exception;
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return properties.getProperty(name);
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}
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protected static String humanReadableList(Object... values) {
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String list = "";
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for (int i=0; i<values.length; i++) {
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if (i >= 1)
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list += ", ";
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if (i == values.length -1)
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list += " or ";
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list += "\"" + values[i] + "\"";
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}
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return list;
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}
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public static String getProperty(String name, String defaultValue, String... allowedValues) throws GuacamoleException {
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String value = getProperty(name);
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// Use default if not specified
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if (value == null) {
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if (defaultValue == null)
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throw new GuacamoleException("Parameter \"" + name + "\" is required.");
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return defaultValue;
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}
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// If not restricted to certain values, just return whatever is given.
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if (allowedValues.length == 0)
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return value;
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// If restricted, only return value within given list
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for (String allowedValue : allowedValues)
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if (value.equals(allowedValue))
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return value;
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throw new GuacamoleException("Parameter \"" + name + "\" must be " + humanReadableList((Object) allowedValues));
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}
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public static boolean getBooleanProperty(String name, Boolean defaultValue) throws GuacamoleException {
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String value = getProperty(name);
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// Use default if not specified
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if (value == null) {
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if (defaultValue == null)
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throw new GuacamoleException("Parameter \"" + name + "\" is required.");
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return defaultValue;
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}
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value = value.trim();
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if (value.equals("true"))
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return true;
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if (value.equals("false"))
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return false;
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throw new GuacamoleException("Parameter \"" + name + "\" must be \"true\" or \"false\".");
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}
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public static int getIntProperty(String name, Integer defaultValue, Integer... allowedValues) throws GuacamoleException {
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String parmString = getProperty(name);
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// Use default if not specified
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if (parmString== null) {
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if (defaultValue == null)
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throw new GuacamoleException("Parameter \"" + name + "\" is required.");
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return defaultValue;
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}
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try {
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int value = Integer.parseInt(parmString);
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// If not restricted to certain values, just return whatever is given.
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if (allowedValues.length == 0)
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return value;
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// If restricted, only return value within given list
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for (int allowedValue : allowedValues)
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if (value == allowedValue)
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return value;
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throw new GuacamoleException("Parameter \"" + name + "\" must be " + humanReadableList((Object) allowedValues));
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}
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catch (NumberFormatException e) {
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throw new GuacamoleException("Parameter \"" + name + "\" must be an integer.", e);
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}
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}
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}
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