[slf4j-dev] svn commit: r794 - slf4j/trunk/jcl104-over-slf4j/src/main/java/org/apache/commons/logging/impl

ceki at slf4j.org ceki at slf4j.org
Mon Apr 16 21:48:15 CEST 2007


Author: ceki
Date: Mon Apr 16 21:48:14 2007
New Revision: 794

Added:
   slf4j/trunk/jcl104-over-slf4j/src/main/java/org/apache/commons/logging/impl/NoOpLog.java
   slf4j/trunk/jcl104-over-slf4j/src/main/java/org/apache/commons/logging/impl/SimpleLog.java

Log:
Added implementations which are occasionally referenced directly by libraries such as commons-configuration

Added: slf4j/trunk/jcl104-over-slf4j/src/main/java/org/apache/commons/logging/impl/NoOpLog.java
==============================================================================
--- (empty file)
+++ slf4j/trunk/jcl104-over-slf4j/src/main/java/org/apache/commons/logging/impl/NoOpLog.java	Mon Apr 16 21:48:14 2007
@@ -0,0 +1,106 @@
+/*
+ * Copyright 2001-2004 The Apache Software Foundation.
+ * 
+ * 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.apache.commons.logging.impl;
+
+
+import java.io.Serializable;
+import org.apache.commons.logging.Log;
+
+
+/**
+ * <p>Trivial implementation of Log that throws away all messages.  No
+ * configurable system properties are supported.</p>
+ *
+ * @author <a href="mailto:sanders at apache.org">Scott Sanders</a>
+ * @author Rod Waldhoff
+ * @version $Id: NoOpLog.java,v 1.8 2004/06/06 21:13:12 rdonkin Exp $
+ */
+public class NoOpLog implements Log, Serializable {
+
+    /** Convenience constructor */
+    public NoOpLog() { }
+    /** Base constructor */
+    public NoOpLog(String name) { }
+    /** Do nothing */
+    public void trace(Object message) { }
+    /** Do nothing */
+    public void trace(Object message, Throwable t) { }
+    /** Do nothing */
+    public void debug(Object message) { }
+    /** Do nothing */
+    public void debug(Object message, Throwable t) { }
+    /** Do nothing */
+    public void info(Object message) { }
+    /** Do nothing */
+    public void info(Object message, Throwable t) { }
+    /** Do nothing */
+    public void warn(Object message) { }
+    /** Do nothing */
+    public void warn(Object message, Throwable t) { }
+    /** Do nothing */
+    public void error(Object message) { }
+    /** Do nothing */
+    public void error(Object message, Throwable t) { }
+    /** Do nothing */
+    public void fatal(Object message) { }
+    /** Do nothing */
+    public void fatal(Object message, Throwable t) { }
+
+    /**
+     * Debug is never enabled.
+     *
+     * @return false
+     */
+    public final boolean isDebugEnabled() { return false; }
+
+    /**
+     * Error is never enabled.
+     *
+     * @return false
+     */
+    public final boolean isErrorEnabled() { return false; }
+
+    /**
+     * Fatal is never enabled.
+     *
+     * @return false
+     */
+    public final boolean isFatalEnabled() { return false; }
+
+    /**
+     * Info is never enabled.
+     *
+     * @return false
+     */
+    public final boolean isInfoEnabled() { return false; }
+
+    /**
+     * Trace is never enabled.
+     *
+     * @return false
+     */
+    public final boolean isTraceEnabled() { return false; }
+
+    /**
+     * Warn is never enabled.
+     *
+     * @return false
+     */
+    public final boolean isWarnEnabled() { return false; }
+
+}

Added: slf4j/trunk/jcl104-over-slf4j/src/main/java/org/apache/commons/logging/impl/SimpleLog.java
==============================================================================
--- (empty file)
+++ slf4j/trunk/jcl104-over-slf4j/src/main/java/org/apache/commons/logging/impl/SimpleLog.java	Mon Apr 16 21:48:14 2007
@@ -0,0 +1,652 @@
+/*
+ * Copyright 2001-2004 The Apache Software Foundation.
+ * 
+ * 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.apache.commons.logging.impl;
+
+import java.io.InputStream;
+import java.io.Serializable;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Properties;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogConfigurationException;
+
+/**
+ * <p>Simple implementation of Log that sends all enabled log messages,
+ * for all defined loggers, to System.err.  The following system properties
+ * are supported to configure the behavior of this logger:</p>
+ * <ul>
+ * <li><code>org.apache.commons.logging.simplelog.defaultlog</code> -
+ *     Default logging detail level for all instances of SimpleLog.
+ *     Must be one of ("trace", "debug", "info", "warn", "error", or "fatal").
+ *     If not specified, defaults to "info". </li>
+ * <li><code>org.apache.commons.logging.simplelog.log.xxxxx</code> -
+ *     Logging detail level for a SimpleLog instance named "xxxxx".
+ *     Must be one of ("trace", "debug", "info", "warn", "error", or "fatal").
+ *     If not specified, the default logging detail level is used.</li>
+ * <li><code>org.apache.commons.logging.simplelog.showlogname</code> -
+ *     Set to <code>true</code> if you want the Log instance name to be
+ *     included in output messages. Defaults to <code>false</code>.</li>
+ * <li><code>org.apache.commons.logging.simplelog.showShortLogname</code> -
+ *     Set to <code>true</code> if you want the last component of the name to be
+ *     included in output messages. Defaults to <code>true</code>.</li>
+ * <li><code>org.apache.commons.logging.simplelog.showdatetime</code> -
+ *     Set to <code>true</code> if you want the current date and time
+ *     to be included in output messages. Default is <code>false</code>.</li>
+ * <li><code>org.apache.commons.logging.simplelog.dateTimeFormat</code> -
+ *     The date and time format to be used in the output messages.
+ *     The pattern describing the date and time format is the same that is
+ *     used in <code>java.text.SimpleDateFormat</code>. If the format is not
+ *     specified or is invalid, the default format is used.
+ *     The default format is <code>yyyy/MM/dd HH:mm:ss:SSS zzz</code>.</li>
+ * </ul>
+ *
+ * <p>In addition to looking for system properties with the names specified
+ * above, this implementation also checks for a class loader resource named
+ * <code>"simplelog.properties"</code>, and includes any matching definitions
+ * from this resource (if it exists).</p>
+ *
+ * @author <a href="mailto:sanders at apache.org">Scott Sanders</a>
+ * @author Rod Waldhoff
+ * @author Robert Burrell Donkin
+ *
+ * @version $Id: SimpleLog.java,v 1.21 2004/06/06 20:47:56 rdonkin Exp $
+ */
+public class SimpleLog implements Log, Serializable {
+
+
+    // ------------------------------------------------------- Class Attributes
+
+    /** All system properties used by <code>SimpleLog</code> start with this */
+    static protected final String systemPrefix =
+        "org.apache.commons.logging.simplelog.";
+
+    /** Properties loaded from simplelog.properties */
+    static protected final Properties simpleLogProps = new Properties();
+
+    /** The default format to use when formating dates */
+    static protected final String DEFAULT_DATE_TIME_FORMAT =
+        "yyyy/MM/dd HH:mm:ss:SSS zzz";
+
+    /** Include the instance name in the log message? */
+    static protected boolean showLogName = false;
+    /** Include the short name ( last component ) of the logger in the log
+     *  message. Defaults to true - otherwise we'll be lost in a flood of
+     *  messages without knowing who sends them.
+     */
+    static protected boolean showShortName = true;
+    /** Include the current time in the log message */
+    static protected boolean showDateTime = false;
+    /** The date and time format to use in the log message */
+    static protected String dateTimeFormat = DEFAULT_DATE_TIME_FORMAT;
+    /** Used to format times */
+    static protected DateFormat dateFormatter = null;
+
+    // ---------------------------------------------------- Log Level Constants
+
+
+    /** "Trace" level logging. */
+    public static final int LOG_LEVEL_TRACE  = 1;
+    /** "Debug" level logging. */
+    public static final int LOG_LEVEL_DEBUG  = 2;
+    /** "Info" level logging. */
+    public static final int LOG_LEVEL_INFO   = 3;
+    /** "Warn" level logging. */
+    public static final int LOG_LEVEL_WARN   = 4;
+    /** "Error" level logging. */
+    public static final int LOG_LEVEL_ERROR  = 5;
+    /** "Fatal" level logging. */
+    public static final int LOG_LEVEL_FATAL  = 6;
+
+    /** Enable all logging levels */
+    public static final int LOG_LEVEL_ALL    = (LOG_LEVEL_TRACE - 1);
+
+    /** Enable no logging levels */
+    public static final int LOG_LEVEL_OFF    = (LOG_LEVEL_FATAL + 1);
+
+    // ------------------------------------------------------------ Initializer
+
+    private static String getStringProperty(String name) {
+        String prop = null;
+	try {
+	    prop = System.getProperty(name);
+	} catch (SecurityException e) {
+	    ; // Ignore
+	}
+        return (prop == null) ? simpleLogProps.getProperty(name) : prop;
+    }
+
+    private static String getStringProperty(String name, String dephault) {
+        String prop = getStringProperty(name);
+        return (prop == null) ? dephault : prop;
+    }
+
+    private static boolean getBooleanProperty(String name, boolean dephault) {
+        String prop = getStringProperty(name);
+        return (prop == null) ? dephault : "true".equalsIgnoreCase(prop);
+    }
+
+    // Initialize class attributes.
+    // Load properties file, if found.
+    // Override with system properties.
+    static {
+        // Add props from the resource simplelog.properties
+        InputStream in = getResourceAsStream("simplelog.properties");
+        if(null != in) {
+            try {
+                simpleLogProps.load(in);
+                in.close();
+            } catch(java.io.IOException e) {
+                // ignored
+            }
+        }
+
+        showLogName = getBooleanProperty( systemPrefix + "showlogname", showLogName);
+        showShortName = getBooleanProperty( systemPrefix + "showShortLogname", showShortName);
+        showDateTime = getBooleanProperty( systemPrefix + "showdatetime", showDateTime);
+
+        if(showDateTime) {
+            dateTimeFormat = getStringProperty(systemPrefix + "dateTimeFormat",
+                                               dateTimeFormat);
+            try {
+                dateFormatter = new SimpleDateFormat(dateTimeFormat);
+            } catch(IllegalArgumentException e) {
+                // If the format pattern is invalid - use the default format
+                dateTimeFormat = DEFAULT_DATE_TIME_FORMAT;
+                dateFormatter = new SimpleDateFormat(dateTimeFormat);
+            }
+        }
+    }
+
+
+    // ------------------------------------------------------------- Attributes
+
+    /** The name of this simple log instance */
+    protected String logName = null;
+    /** The current log level */
+    protected int currentLogLevel;
+    /** The short name of this simple log instance */
+    private String shortLogName = null;
+
+
+    // ------------------------------------------------------------ Constructor
+
+    /**
+     * Construct a simple log with given name.
+     *
+     * @param name log name
+     */
+    public SimpleLog(String name) {
+
+        logName = name;
+
+        // Set initial log level
+        // Used to be: set default log level to ERROR
+        // IMHO it should be lower, but at least info ( costin ).
+        setLevel(SimpleLog.LOG_LEVEL_INFO);
+
+        // Set log level from properties
+        String lvl = getStringProperty(systemPrefix + "log." + logName);
+        int i = String.valueOf(name).lastIndexOf(".");
+        while(null == lvl && i > -1) {
+            name = name.substring(0,i);
+            lvl = getStringProperty(systemPrefix + "log." + name);
+            i = String.valueOf(name).lastIndexOf(".");
+        }
+
+        if(null == lvl) {
+            lvl =  getStringProperty(systemPrefix + "defaultlog");
+        }
+
+        if("all".equalsIgnoreCase(lvl)) {
+            setLevel(SimpleLog.LOG_LEVEL_ALL);
+        } else if("trace".equalsIgnoreCase(lvl)) {
+            setLevel(SimpleLog.LOG_LEVEL_TRACE);
+        } else if("debug".equalsIgnoreCase(lvl)) {
+            setLevel(SimpleLog.LOG_LEVEL_DEBUG);
+        } else if("info".equalsIgnoreCase(lvl)) {
+            setLevel(SimpleLog.LOG_LEVEL_INFO);
+        } else if("warn".equalsIgnoreCase(lvl)) {
+            setLevel(SimpleLog.LOG_LEVEL_WARN);
+        } else if("error".equalsIgnoreCase(lvl)) {
+            setLevel(SimpleLog.LOG_LEVEL_ERROR);
+        } else if("fatal".equalsIgnoreCase(lvl)) {
+            setLevel(SimpleLog.LOG_LEVEL_FATAL);
+        } else if("off".equalsIgnoreCase(lvl)) {
+            setLevel(SimpleLog.LOG_LEVEL_OFF);
+        }
+
+    }
+
+
+    // -------------------------------------------------------- Properties
+
+    /**
+     * <p> Set logging level. </p>
+     *
+     * @param currentLogLevel new logging level
+     */
+    public void setLevel(int currentLogLevel) {
+
+        this.currentLogLevel = currentLogLevel;
+
+    }
+
+
+    /**
+     * <p> Get logging level. </p>
+     */
+    public int getLevel() {
+
+        return currentLogLevel;
+    }
+
+
+    // -------------------------------------------------------- Logging Methods
+
+
+    /**
+     * <p> Do the actual logging.
+     * This method assembles the message
+     * and then calls <code>write()</code> to cause it to be written.</p>
+     *
+     * @param type One of the LOG_LEVEL_XXX constants defining the log level
+     * @param message The message itself (typically a String)
+     * @param t The exception whose stack trace should be logged
+     */
+    protected void log(int type, Object message, Throwable t) {
+        // Use a string buffer for better performance
+        StringBuffer buf = new StringBuffer();
+
+        // Append date-time if so configured
+        if(showDateTime) {
+            buf.append(dateFormatter.format(new Date()));
+            buf.append(" ");
+        }
+
+        // Append a readable representation of the log level
+        switch(type) {
+            case SimpleLog.LOG_LEVEL_TRACE: buf.append("[TRACE] "); break;
+            case SimpleLog.LOG_LEVEL_DEBUG: buf.append("[DEBUG] "); break;
+            case SimpleLog.LOG_LEVEL_INFO:  buf.append("[INFO] ");  break;
+            case SimpleLog.LOG_LEVEL_WARN:  buf.append("[WARN] ");  break;
+            case SimpleLog.LOG_LEVEL_ERROR: buf.append("[ERROR] "); break;
+            case SimpleLog.LOG_LEVEL_FATAL: buf.append("[FATAL] "); break;
+        }
+
+        // Append the name of the log instance if so configured
+ 	if( showShortName) {
+            if( shortLogName==null ) {
+                // Cut all but the last component of the name for both styles
+                shortLogName = logName.substring(logName.lastIndexOf(".") + 1);
+                shortLogName =
+                    shortLogName.substring(shortLogName.lastIndexOf("/") + 1);
+            }
+            buf.append(String.valueOf(shortLogName)).append(" - ");
+        } else if(showLogName) {
+            buf.append(String.valueOf(logName)).append(" - ");
+        }
+
+        // Append the message
+        buf.append(String.valueOf(message));
+
+        // Append stack trace if not null
+        if(t != null) {
+            buf.append(" <");
+            buf.append(t.toString());
+            buf.append(">");
+
+            java.io.StringWriter sw= new java.io.StringWriter(1024);
+            java.io.PrintWriter pw= new java.io.PrintWriter(sw);
+            t.printStackTrace(pw);
+            pw.close();
+            buf.append(sw.toString());
+        }
+
+        // Print to the appropriate destination
+        write(buf);
+
+    }
+
+
+    /**
+     * <p>Write the content of the message accumulated in the specified
+     * <code>StringBuffer</code> to the appropriate output destination.  The
+     * default implementation writes to <code>System.err</code>.</p>
+     *
+     * @param buffer A <code>StringBuffer</code> containing the accumulated
+     *  text to be logged
+     */
+    protected void write(StringBuffer buffer) {
+
+        System.err.println(buffer.toString());
+
+    }
+
+
+    /**
+     * Is the given log level currently enabled?
+     *
+     * @param logLevel is this level enabled?
+     */
+    protected boolean isLevelEnabled(int logLevel) {
+        // log level are numerically ordered so can use simple numeric
+        // comparison
+        return (logLevel >= currentLogLevel);
+    }
+
+
+    // -------------------------------------------------------- Log Implementation
+
+
+    /**
+     * <p> Log a message with debug log level.</p>
+     */
+    public final void debug(Object message) {
+
+        if (isLevelEnabled(SimpleLog.LOG_LEVEL_DEBUG)) {
+            log(SimpleLog.LOG_LEVEL_DEBUG, message, null);
+        }
+    }
+
+
+    /**
+     * <p> Log an error with debug log level.</p>
+     */
+    public final void debug(Object message, Throwable t) {
+
+        if (isLevelEnabled(SimpleLog.LOG_LEVEL_DEBUG)) {
+            log(SimpleLog.LOG_LEVEL_DEBUG, message, t);
+        }
+    }
+
+
+    /**
+     * <p> Log a message with trace log level.</p>
+     */
+    public final void trace(Object message) {
+
+        if (isLevelEnabled(SimpleLog.LOG_LEVEL_TRACE)) {
+            log(SimpleLog.LOG_LEVEL_TRACE, message, null);
+        }
+    }
+
+
+    /**
+     * <p> Log an error with trace log level.</p>
+     */
+    public final void trace(Object message, Throwable t) {
+
+        if (isLevelEnabled(SimpleLog.LOG_LEVEL_TRACE)) {
+            log(SimpleLog.LOG_LEVEL_TRACE, message, t);
+        }
+    }
+
+
+    /**
+     * <p> Log a message with info log level.</p>
+     */
+    public final void info(Object message) {
+
+        if (isLevelEnabled(SimpleLog.LOG_LEVEL_INFO)) {
+            log(SimpleLog.LOG_LEVEL_INFO,message,null);
+        }
+    }
+
+
+    /**
+     * <p> Log an error with info log level.</p>
+     */
+    public final void info(Object message, Throwable t) {
+
+        if (isLevelEnabled(SimpleLog.LOG_LEVEL_INFO)) {
+            log(SimpleLog.LOG_LEVEL_INFO, message, t);
+        }
+    }
+
+
+    /**
+     * <p> Log a message with warn log level.</p>
+     */
+    public final void warn(Object message) {
+
+        if (isLevelEnabled(SimpleLog.LOG_LEVEL_WARN)) {
+            log(SimpleLog.LOG_LEVEL_WARN, message, null);
+        }
+    }
+
+
+    /**
+     * <p> Log an error with warn log level.</p>
+     */
+    public final void warn(Object message, Throwable t) {
+
+        if (isLevelEnabled(SimpleLog.LOG_LEVEL_WARN)) {
+            log(SimpleLog.LOG_LEVEL_WARN, message, t);
+        }
+    }
+
+
+    /**
+     * <p> Log a message with error log level.</p>
+     */
+    public final void error(Object message) {
+
+        if (isLevelEnabled(SimpleLog.LOG_LEVEL_ERROR)) {
+            log(SimpleLog.LOG_LEVEL_ERROR, message, null);
+        }
+    }
+
+
+    /**
+     * <p> Log an error with error log level.</p>
+     */
+    public final void error(Object message, Throwable t) {
+
+        if (isLevelEnabled(SimpleLog.LOG_LEVEL_ERROR)) {
+            log(SimpleLog.LOG_LEVEL_ERROR, message, t);
+        }
+    }
+
+
+    /**
+     * <p> Log a message with fatal log level.</p>
+     */
+    public final void fatal(Object message) {
+
+        if (isLevelEnabled(SimpleLog.LOG_LEVEL_FATAL)) {
+            log(SimpleLog.LOG_LEVEL_FATAL, message, null);
+        }
+    }
+
+
+    /**
+     * <p> Log an error with fatal log level.</p>
+     */
+    public final void fatal(Object message, Throwable t) {
+
+        if (isLevelEnabled(SimpleLog.LOG_LEVEL_FATAL)) {
+            log(SimpleLog.LOG_LEVEL_FATAL, message, t);
+        }
+    }
+
+
+    /**
+     * <p> Are debug messages currently enabled? </p>
+     *
+     * <p> This allows expensive operations such as <code>String</code>
+     * concatenation to be avoided when the message will be ignored by the
+     * logger. </p>
+     */
+    public final boolean isDebugEnabled() {
+
+        return isLevelEnabled(SimpleLog.LOG_LEVEL_DEBUG);
+    }
+
+
+    /**
+     * <p> Are error messages currently enabled? </p>
+     *
+     * <p> This allows expensive operations such as <code>String</code>
+     * concatenation to be avoided when the message will be ignored by the
+     * logger. </p>
+     */
+    public final boolean isErrorEnabled() {
+
+        return isLevelEnabled(SimpleLog.LOG_LEVEL_ERROR);
+    }
+
+
+    /**
+     * <p> Are fatal messages currently enabled? </p>
+     *
+     * <p> This allows expensive operations such as <code>String</code>
+     * concatenation to be avoided when the message will be ignored by the
+     * logger. </p>
+     */
+    public final boolean isFatalEnabled() {
+
+        return isLevelEnabled(SimpleLog.LOG_LEVEL_FATAL);
+    }
+
+
+    /**
+     * <p> Are info messages currently enabled? </p>
+     *
+     * <p> This allows expensive operations such as <code>String</code>
+     * concatenation to be avoided when the message will be ignored by the
+     * logger. </p>
+     */
+    public final boolean isInfoEnabled() {
+
+        return isLevelEnabled(SimpleLog.LOG_LEVEL_INFO);
+    }
+
+
+    /**
+     * <p> Are trace messages currently enabled? </p>
+     *
+     * <p> This allows expensive operations such as <code>String</code>
+     * concatenation to be avoided when the message will be ignored by the
+     * logger. </p>
+     */
+    public final boolean isTraceEnabled() {
+
+        return isLevelEnabled(SimpleLog.LOG_LEVEL_TRACE);
+    }
+
+
+    /**
+     * <p> Are warn messages currently enabled? </p>
+     *
+     * <p> This allows expensive operations such as <code>String</code>
+     * concatenation to be avoided when the message will be ignored by the
+     * logger. </p>
+     */
+    public final boolean isWarnEnabled() {
+
+        return isLevelEnabled(SimpleLog.LOG_LEVEL_WARN);
+    }
+
+
+    /**
+     * Return the thread context class loader if available.
+     * Otherwise return null.
+     *
+     * The thread context class loader is available for JDK 1.2
+     * or later, if certain security conditions are met.
+     *
+     * @exception LogConfigurationException if a suitable class loader
+     * cannot be identified.
+     */
+    private static ClassLoader getContextClassLoader()
+    {
+        ClassLoader classLoader = null;
+
+        if (classLoader == null) {
+            try {
+                // Are we running on a JDK 1.2 or later system?
+                Method method = Thread.class.getMethod("getContextClassLoader", null);
+
+                // Get the thread context class loader (if there is one)
+                try {
+                    classLoader = (ClassLoader)method.invoke(Thread.currentThread(), null);
+                } catch (IllegalAccessException e) {
+                    ;  // ignore
+                } catch (InvocationTargetException e) {
+                    /**
+                     * InvocationTargetException is thrown by 'invoke' when
+                     * the method being invoked (getContextClassLoader) throws
+                     * an exception.
+                     *
+                     * getContextClassLoader() throws SecurityException when
+                     * the context class loader isn't an ancestor of the
+                     * calling class's class loader, or if security
+                     * permissions are restricted.
+                     *
+                     * In the first case (not related), we want to ignore and
+                     * keep going.  We cannot help but also ignore the second
+                     * with the logic below, but other calls elsewhere (to
+                     * obtain a class loader) will trigger this exception where
+                     * we can make a distinction.
+                     */
+                    if (e.getTargetException() instanceof SecurityException) {
+                        ;  // ignore
+                    } else {
+                        // Capture 'e.getTargetException()' exception for details
+                        // alternate: log 'e.getTargetException()', and pass back 'e'.
+                        throw new LogConfigurationException
+                            ("Unexpected InvocationTargetException", e.getTargetException());
+                    }
+                }
+            } catch (NoSuchMethodException e) {
+                // Assume we are running on JDK 1.1
+                ;  // ignore
+            }
+        }
+
+        if (classLoader == null) {
+            classLoader = SimpleLog.class.getClassLoader();
+        }
+
+        // Return the selected class loader
+        return classLoader;
+    }
+
+    private static InputStream getResourceAsStream(final String name)
+    {
+        return (InputStream)AccessController.doPrivileged(
+            new PrivilegedAction() {
+                public Object run() {
+                    ClassLoader threadCL = getContextClassLoader();
+
+                    if (threadCL != null) {
+                        return threadCL.getResourceAsStream(name);
+                    } else {
+                        return ClassLoader.getSystemResourceAsStream(name);
+                    }
+                }
+            });
+    }
+}
+



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