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/*
 * This file is part of Log4Jdbc.
 *
 * Log4Jdbc is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Log4Jdbc 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Log4Jdbc.  If not, see .
 *
 */
package fr.ms.log4jdbc.utils;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

import fr.ms.log4jdbc.thread.LoopRunnable;

/**
 *
 * @see Marco4J
 *
 *
 * @author Marco Semiao
 *
 */
public class Log4JdbcProperties implements Runnable {

    public final static String REQUETE_SQL_STYLE_ORIGINAL = "none";

    public final static String REQUETE_SQL_STYLE_ONELINE = "oneline";

    public final static String REQUETE_SQL_STYLE_FORMAT = "format";

    private final static long LOOP_THREAD = 1000;

    private final static String propertyFile = System.getProperty("log4jdbc.file", "/log4jdbc.properties");

    private final static Log4JdbcProperties instance = new Log4JdbcProperties();

    private Map mapProperties;

    private long lastModified;

    private Log4JdbcProperties() {
	run();

	final Runnable r = new LoopRunnable(this, LOOP_THREAD);

	final Thread t = new Thread(r, "Log4Jdbc-Reload");

	t.setDaemon(true);
	t.setPriority(Thread.MIN_PRIORITY);
	t.start();
    }

    public static Log4JdbcProperties getInstance() {
	return instance;
    }

    public boolean logEnabled() {
	return getProperty("log4jdbc.enabled", true);
    }

    public boolean logProcessThread() {
	return getProperty("log4jdbc.process.thread", true);
    }

    public int logProcessThreadSize() {
	return getProperty("log4jdbc.process.thread.size", 500);
    }

    public boolean logProcessThreadDebug() {
	return getProperty("log4jdbc.process.thread.debug", false);
    }

    public boolean logGenericMessage() {
	return getProperty("log4jdbc.generic.message", false);
    }

    public boolean logConnection() {
	return getProperty("log4jdbc.connection", true);
    }

    public boolean logRequeteAllSQL() {
	return getProperty("log4jdbc.request.sql.all", true);
    }

    public boolean logRequeteExecuteSQL() {
	return getProperty("log4jdbc.request.sql.execute", true) || logRequeteAllSQL();
    }

    public boolean logRequeteBatchSQL() {
	return getProperty("log4jdbc.request.sql.batch", true) || logRequeteAllSQL();
    }

    public boolean logRequeteCommentSQL() {
	return getProperty("log4jdbc.request.sql.comment", true);
    }

    public boolean logRequeteSemiColonAddSQL() {
	return getProperty("log4jdbc.request.sql.semicolon.add", false);
    }

    public String logRequeteStyleSQL() {
	return getProperty("log4jdbc.request.sql.style", REQUETE_SQL_STYLE_ORIGINAL);
    }

    public boolean logRequeteSelectSQL() {
	return getProperty("log4jdbc.request.sql.select", false) || logRequeteAllSQL();
    }

    public boolean logRequeteSelectResultSetSQL() {
	return getProperty("log4jdbc.request.sql.select.resultset", false);
    }

    public boolean logRequeteInsertSQL() {
	return getProperty("log4jdbc.request.sql.insert", false) || logRequeteAllSQL();
    }

    public boolean logRequeteUpdateSQL() {
	return getProperty("log4jdbc.request.sql.update", false) || logRequeteAllSQL();
    }

    public boolean logRequeteDeleteSQL() {
	return getProperty("log4jdbc.request.sql.delete", false) || logRequeteAllSQL();
    }

    public boolean logRequeteCreateSQL() {
	return getProperty("log4jdbc.request.sql.create", false) || logRequeteAllSQL();
    }

    public boolean logRequeteException() {
	return getProperty("log4jdbc.request.exception", false);
    }

    public boolean logStackTrace() {
	return getProperty("log4jdbc.stacktrace", false);
    }

    public String getStacktraceStartPackages() {
	if (mapProperties == null) {
	    return null;
	}
	final Object object = mapProperties.get("log4jdbc.stacktrace.start.packages");
	if (object == null) {
	    return null;
	}
	return (String) object;
    }

    public File file() {
	if (mapProperties == null) {
	    return null;
	}
	final Object object = mapProperties.get("log4jdbc.file");
	if (object == null) {
	    return null;
	}

	final String property = (String) object;

	final File file = new File(property);

	boolean fileExists = file.exists();

	if (!fileExists) {
	    try {
		fileExists = file.createNewFile();
	    } catch (final IOException e) {
	    }
	}

	if (!fileExists) {
	    return null;
	}

	return file;
    }

    private boolean getProperty(final String key, final boolean defaultValue) {
	if (mapProperties == null) {
	    return defaultValue;
	}

	final Object object = mapProperties.get(key);
	if (object == null) {
	    return defaultValue;
	}
	final String property = (String) object;

	return Boolean.valueOf(property).booleanValue();
    }

    private String getProperty(final String key, final String defaultValue) {
	if (mapProperties == null) {
	    return defaultValue;
	}

	final Object object = mapProperties.get(key);
	if (object == null) {
	    return defaultValue;
	}
	final String property = (String) object;

	return property;
    }

    private int getProperty(final String key, final int defaultValue) {
	if (mapProperties == null) {
	    return defaultValue;
	}

	final Object object = mapProperties.get(key);
	if (object == null) {
	    return defaultValue;
	}
	final String property = (String) object;

	return Integer.valueOf(property).intValue();
    }

    private InputStream getInputStream(final String path) {
	InputStream propStream = null;

	final File f = new File(path);
	if (f.isFile()) {
	    final long lastModified = f.lastModified();
	    if (lastModified > this.lastModified) {
		this.lastModified = lastModified;
		System.out.println("Rechargement du fichier de configuration : " + f);
	    } else {
		return null;
	    }

	    try {
		propStream = new FileInputStream(f);
	    } catch (final FileNotFoundException e) {
		e.printStackTrace();
	    }
	} else {
	    propStream = Log4JdbcProperties.class.getResourceAsStream(path);
	}

	if (propStream != null) {
	    propStream = new InputStreamWrapper(propStream);
	}

	return propStream;
    }

    private Properties getLoadProperties() {
	Properties props = null;

	final InputStream propStream = getInputStream(propertyFile);

	if (propStream != null) {
	    try {
		props = new Properties();
		props.load(propStream);
	    } catch (final IOException e) {
		System.err.println(e);
	    } finally {
		try {
		    propStream.close();
		} catch (final IOException e) {
		    System.err.println(e);
		}
	    }
	}

	return props;
    }

    private Map getMapProperties() {
	final Properties props = getLoadProperties();
	if (props == null) {
	    return null;
	}

	final Map m = new HashMap();

	final Enumeration propertyNames = props.propertyNames();
	while (propertyNames.hasMoreElements()) {
	    final String key = (String) propertyNames.nextElement();
	    final String value = props.getProperty(key);

	    m.put(key, value.trim());
	}

	return Collections.unmodifiableMap(m);
    }

    public void run() {
	final Map loadProperties = getMapProperties();

	if (loadProperties != null) {
	    this.mapProperties = loadProperties;
	}
    }
}