P2P试验平台开源代码

/* * Copyright (c) 2003-2005 The BISON Project * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * */ package peersim.config; import java.lang.reflect.*; import java.util.*; import org.lsmp.djep.groupJep.*; /** * This class is the container for the configuration data used in * {@link Configuration}; see that class for more information. */ public class ConfigContainer { // =================== static fields ================================= // =================================================================== /** Symbolic constant for no debug */ private static final int DEBUG_NO = 0; /** Symbolic constant for regular debug */ private static final int DEBUG_REG = 1; /** Symbolic constant for extended debug */ private static final int DEBUG_CONTEXT = 2; //========================== fields ================================= //=================================================================== /** * The properties object that stores all configuration information. */ private Properties config; /** * Map associating string protocol names to the numeric protocol * identifiers. The protocol names are understood without prefix. */ private Map<String, Integer> protocols; /** * The maximum depth that can be reached when analyzing expressions. This * value can be substituted by setting the configuration parameter * PAR_MAXDEPTH. */ private int maxdepth; /** Debug level */ private int debugLevel; /** * If true, no exception is thrown. Instead, an error is printed and the * Configuration tries to return a reasonable return value */ private boolean check = false; // =================== initialization ================================ // =================================================================== public ConfigContainer(Properties config, boolean check) { this.config = config; this.check = check; maxdepth = getInt(Configuration.PAR_MAXDEPTH, Configuration.DEFAULT_MAXDEPTH); // initialize protocol id-s protocols = new HashMap<String, Integer>(); String[] prots = getNames(Configuration.PAR_PROT);// they're returned in correct order for (int i = 0; i < prots.length; ++i) { protocols.put(prots[i].substring(Configuration.PAR_PROT.length() + 1), Integer.valueOf(i)); } String debug = config.getProperty(Configuration.PAR_DEBUG); if (Configuration.DEBUG_EXTENDED.equals(debug)) debugLevel = DEBUG_CONTEXT; else if (Configuration.DEBUG_FULL.equals(debug)) { Map<String, String> map = new TreeMap<String, String>(); Enumeration e = config.propertyNames(); while (e.hasMoreElements()) { String name = (String) e.nextElement(); String value = config.getProperty(name); map.put(name, value); } Iterator i = map.keySet().iterator(); while (i.hasNext()) { String name = (String) i.next(); System.err.println("DEBUG " + name + ("".equals(map.get(name)) ? "" : " = " + map.get(name))); } } else if (debug != null) { debugLevel = DEBUG_REG; } else { debugLevel = DEBUG_NO; } } // =================== static public methods ========================= // =================================================================== /** * @return true if and only if name is a specified (existing) property. */ public boolean contains(String name) { boolean ret = config.containsKey(name); debug(name, "" + ret); return ret; } // ------------------------------------------------------------------- /** * Reads given configuration property. If not found, throws a * {@link MissingParameterException}. * @param name * Name of configuration property * @param def * default value */ public boolean getBoolean(String name, boolean def) { try { return getBool(name); } catch (RuntimeException e) { manageDefault(name, def, e); return def; } } // ------------------------------------------------------------------- /** * Reads given property. If not found, or the value is empty string then * throws a {@link MissingParameterException}. Empty string is not * accepted as false due to the similar function of {@link #contains} which * returns true in that case. True is returned if the lowercase value of * the property is "true", otherwise false is returned. * @param name * Name of configuration property */ public boolean getBoolean(String name) { try { return getBool(name); } catch (RuntimeException e) { manageException(name, e); return false; } } //------------------------------------------------------------------- /** * The actual methods that implements getBoolean. */ private boolean getBool(String name) { if (config.getProperty(name) == null) { throw new MissingParameterException(name); // "\nPossibly incorrect property: " + getSimilarProperty(name)); } if (config.getProperty(name).matches("\\p{Blank}*")) { throw new MissingParameterException(name, "Blank value is not accepted when parsing Boolean."); } boolean ret = Boolean.valueOf(config.getProperty(name)); debug(name, "" + ret); return ret; } // ------------------------------------------------------------------- /** * Reads given configuration property. If not found, returns the default * value. * @param name * Name of configuration property * @param def * default value */ public int getInt(String name, int def) { try { Number ret = getVal(name, name, 0); debug(name, "" + ret); return ret.intValue(); } catch (RuntimeException e) { manageDefault(name, def, e); return def; } } // ------------------------------------------------------------------- /** * Reads given configuration property. If not found, throws a * {@link MissingParameterException}. * @param name * Name of configuration property */ public int getInt(String name) { try { Number ret = getVal(name, name, 0); debug(name, "" + ret); return ret.intValue(); } catch (RuntimeException e) { manageException(name, e); return 0; } } // ------------------------------------------------------------------- /** * Reads given configuration property. If not found, returns the default * value. * @param name * Name of configuration property * @param def * default value */ public long getLong(String name, long def) { try { Number ret = getVal(name, name, 0); debug(name, "" + ret); return ret.longValue(); } catch (RuntimeException e) { manageDefault(name, def, e); return def; } } // ------------------------------------------------------------------- /** * Reads given configuration property. If not found, throws a * {@link MissingParameterException}. * @param name * Name of configuration property */ public long getLong(String name) { try { Number ret = getVal(name, name, 0); debug(name, "" + ret); return ret.longValue(); } catch (RuntimeException e) { manageException(name, e); return 0; } } // ------------------------------------------------------------------- /** * Reads given configuration property. If not found, returns the default * value. * @param name * Name of configuration property * @param def * default value */ public double getDouble(String name, double def) { try { Number ret = getVal(name, name, 0); debug(name, "" + ret); return ret.doubleValue(); } catch (RuntimeException e) { manageDefault(name, def, e); return def; } } // ---------------------------------------------------