<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <!--NewPage--> <HTML> <HEAD> <!-- Generated by javadoc (build 1.7.0-internal) on Tue Mar 04 15:24:47 EST 2008 --> <TITLE> OptionConverter (Log4j Version 1.2.14) </TITLE> <META NAME="date" CONTENT="2008-03-04"> <LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style"> <SCRIPT type="text/javascript"> function windowTitle() { if (location.href.indexOf('is-external=true') == -1) { parent.document.title="OptionConverter (Log4j Version 1.2.14)"; } } </SCRIPT> <NOSCRIPT> </NOSCRIPT> </HEAD> <BODY BGCOLOR="white" onload="windowTitle();"> <HR> <!-- ========= START OF TOP NAVBAR ======= --> <A NAME="navbar_top"><!-- --></A> <A HREF="#skip-navbar_top" title="Skip navigation links"></A> <TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""> <TR> <TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A NAME="navbar_top_firstrow"><!-- --></A> <TABLE 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Classes</B></A>'); } //--> </SCRIPT> <NOSCRIPT> <A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A> </NOSCRIPT> </FONT></TD> </TR> <TR> <TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: NESTED | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD> <TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> DETAIL: FIELD | CONSTR | <A HREF="#method_detail">METHOD</A></FONT></TD> </TR> </TABLE> <A NAME="skip-navbar_top"></A> <!-- ========= END OF TOP NAVBAR ========= --> <HR> <!-- ======== START OF CLASS DATA ======== --> <H2> <FONT SIZE="-1"> org.apache.log4j.helpers</FONT> <BR> Class OptionConverter</H2> <PRE> <A HREF="/usr/share/javadoc/java/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A> <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.log4j.helpers.OptionConverter</B> </PRE> <HR> <DL> <DT><PRE>public class <B>OptionConverter</B><DT>extends <A HREF="/usr/share/javadoc/java/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></DL> </PRE> <P> A convenience class to convert property values to specific types. <P> <P> <DL> <DT><B>Author:</B></DT> <DD>Ceki Gülcü, Simon Kitching;, Anders Kristensen</DD> </DL> <HR> <P> <!-- ========== METHOD SUMMARY =========== --> <A NAME="method_summary"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> <B>Method Summary</B></FONT></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE>static <A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>[]</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../org/apache/log4j/helpers/OptionConverter.html#concatanateArrays(java.lang.String[], java.lang.String[])">concatanateArrays</A></B>(<A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>[] l, <A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>[] r)</CODE> <BR> </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE>static <A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../org/apache/log4j/helpers/OptionConverter.html#convertSpecialChars(java.lang.String)">convertSpecialChars</A></B>(<A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> s)</CODE> <BR> </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE>static <A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../org/apache/log4j/helpers/OptionConverter.html#findAndSubst(java.lang.String, java.util.Properties)">findAndSubst</A></B>(<A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> key, <A HREF="/usr/share/javadoc/java/java/util/Properties.html?is-external=true" title="class or interface in java.util">Properties</A> props)</CODE> <BR> Find the value corresponding to <code>key</code> in <code>props</code>.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE>static <A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../org/apache/log4j/helpers/OptionConverter.html#getSystemProperty(java.lang.String, java.lang.String)">getSystemProperty</A></B>(<A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> key, <A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> def)</CODE> <BR> Very similar to <code>System.getProperty</code> except that the <A HREF="/usr/share/javadoc/java/java/lang/SecurityException.html?is-external=true" title="class or interface in java.lang"><CODE>SecurityException</CODE></A> is hidden.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE>static <A HREF="/usr/share/javadoc/java/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../org/apache/log4j/helpers/OptionConverter.html#instantiateByClassName(java.lang.String, java.lang.Class, java.lang.Object)">instantiateByClassName</A></B>(<A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> className, <A HREF="/usr/share/javadoc/java/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A> superClass, <A HREF="/usr/share/javadoc/java/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> defaultValue)</CODE> <BR> Instantiate an object given a class name.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE>static <A HREF="/usr/share/javadoc/java/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../org/apache/log4j/helpers/OptionConverter.html#instantiateByKey(java.util.Properties, java.lang.String, java.lang.Class, java.lang.Object)">instantiateByKey</A></B>(<A HREF="/usr/share/javadoc/java/java/util/Properties.html?is-external=true" title="class or interface in java.util">Properties</A> props, <A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> key, <A HREF="/usr/share/javadoc/java/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A> superClass, <A HREF="/usr/share/javadoc/java/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> defaultValue)</CODE> <BR> </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE>static void</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../org/apache/log4j/helpers/OptionConverter.html#selectAndConfigure(java.net.URL, java.lang.String, org.apache.log4j.spi.LoggerRepository)">selectAndConfigure</A></B>(<A HREF="/usr/share/javadoc/java/java/net/URL.html?is-external=true" title="class or interface in java.net">URL</A> url, <A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> clazz, <A HREF="../../../../org/apache/log4j/spi/LoggerRepository.html" title="interface in org.apache.log4j.spi">LoggerRepository</A> hierarchy)</CODE> <BR> Configure log4j given a URL.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE>static <A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../org/apache/log4j/helpers/OptionConverter.html#substVars(java.lang.String, java.util.Properties)">substVars</A></B>(<A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> val, <A HREF="/usr/share/javadoc/java/java/util/Properties.html?is-external=true" title="class or interface in java.util">Properties</A> props)</CODE> <BR> Perform variable substitution in string <code>val</code> from the values of keys found in the system propeties.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE>static boolean</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../org/apache/log4j/helpers/OptionConverter.html#toBoolean(java.lang.String, boolean)">toBoolean</A></B>(<A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> value, boolean dEfault)</CODE> <BR> If <code>value</code> is "true", then <code>true</code> is returned.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE>static long</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../org/apache/log4j/helpers/OptionConverter.html#toFileSize(java.lang.String, long)">toFileSize</A></B>(<A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> value, long dEfault)</CODE> <BR> </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE>static int</CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../org/apache/log4j/helpers/OptionConverter.html#toInt(java.lang.String, int)">toInt</A></B>(<A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> value, int dEfault)</CODE> <BR> </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> <CODE>static <A HREF="../../../../org/apache/log4j/Level.html" title="class in org.apache.log4j">Level</A></CODE></FONT></TD> <TD><CODE><B><A HREF="../../../../org/apache/log4j/helpers/OptionConverter.html#toLevel(java.lang.String, org.apache.log4j.Level)">toLevel</A></B>(<A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> value, <A HREF="../../../../org/apache/log4j/Level.html" title="class in org.apache.log4j">Level</A> defaultValue)</CODE> <BR> Converts a standard or custom priority level to a Level object.</TD> </TR> </TABLE> <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> <TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="/usr/share/javadoc/java/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></B></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><CODE><A HREF="/usr/share/javadoc/java/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</A>, <A HREF="/usr/share/javadoc/java/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="/usr/share/javadoc/java/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="/usr/share/javadoc/java/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="/usr/share/javadoc/java/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="/usr/share/javadoc/java/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="/usr/share/javadoc/java/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="/usr/share/javadoc/java/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</A>, <A HREF="/usr/share/javadoc/java/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="/usr/share/javadoc/java/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="/usr/share/javadoc/java/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD> </TR> </TABLE> <P> <!-- ============ METHOD DETAIL ========== --> <A NAME="method_detail"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> <B>Method Detail</B></FONT></TH> </TR> </TABLE> <A NAME="concatanateArrays(java.lang.String[], java.lang.String[])"><!-- --></A><H3> concatanateArrays</H3> <PRE> public static <A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>[] <B>concatanateArrays</B>(<A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>[] l, <A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>[] r)</PRE> <DL> <DD><DL> </DL> </DD> </DL> <HR> <A NAME="convertSpecialChars(java.lang.String)"><!-- --></A><H3> convertSpecialChars</H3> <PRE> public static <A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>convertSpecialChars</B>(<A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> s)</PRE> <DL> <DD><DL> </DL> </DD> </DL> <HR> <A NAME="getSystemProperty(java.lang.String, java.lang.String)"><!-- --></A><H3> getSystemProperty</H3> <PRE> public static <A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>getSystemProperty</B>(<A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> key, <A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> def)</PRE> <DL> <DD>Very similar to <code>System.getProperty</code> except that the <A HREF="/usr/share/javadoc/java/java/lang/SecurityException.html?is-external=true" title="class or interface in java.lang"><CODE>SecurityException</CODE></A> is hidden. <P> <DD><DL> <DT><B>Parameters:</B><DD><CODE>key</CODE> - The key to search for.<DD><CODE>def</CODE> - The default value to return. <DT><B>Returns:</B><DD>the string value of the system property, or the default value if there is no property with that key.<DT><B>Since:</B></DT> <DD>1.1</DD> </DL> </DD> </DL> <HR> <A NAME="instantiateByKey(java.util.Properties, java.lang.String, java.lang.Class, java.lang.Object)"><!-- --></A><H3> instantiateByKey</H3> <PRE> public static <A HREF="/usr/share/javadoc/java/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> <B>instantiateByKey</B>(<A HREF="/usr/share/javadoc/java/java/util/Properties.html?is-external=true" title="class or interface in java.util">Properties</A> props, <A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> key, <A HREF="/usr/share/javadoc/java/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A> superClass, <A HREF="/usr/share/javadoc/java/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> defaultValue)</PRE> <DL> <DD><DL> </DL> </DD> </DL> <HR> <A NAME="toBoolean(java.lang.String, boolean)"><!-- --></A><H3> toBoolean</H3> <PRE> public static boolean <B>toBoolean</B>(<A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> value, boolean dEfault)</PRE> <DL> <DD>If <code>value</code> is "true", then <code>true</code> is returned. If <code>value</code> is "false", then <code>true</code> is returned. Otherwise, <code>default</code> is returned. <p>Case of value is unimportant. <P> <DD><DL> </DL> </DD> </DL> <HR> <A NAME="toInt(java.lang.String, int)"><!-- --></A><H3> toInt</H3> <PRE> public static int <B>toInt</B>(<A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> value, int dEfault)</PRE> <DL> <DD><DL> </DL> </DD> </DL> <HR> <A NAME="toLevel(java.lang.String, org.apache.log4j.Level)"><!-- --></A><H3> toLevel</H3> <PRE> public static <A HREF="../../../../org/apache/log4j/Level.html" title="class in org.apache.log4j">Level</A> <B>toLevel</B>(<A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> value, <A HREF="../../../../org/apache/log4j/Level.html" title="class in org.apache.log4j">Level</A> defaultValue)</PRE> <DL> <DD>Converts a standard or custom priority level to a Level object. <p> If <code>value</code> is of form "level#classname", then the specified class' toLevel method is called to process the specified level string; if no '#' character is present, then the default <A HREF="../../../../org/apache/log4j/Level.html" title="class in org.apache.log4j"><CODE>Level</CODE></A> class is used to process the level value. <p>As a special case, if the <code>value</code> parameter is equal to the string "NULL", then the value <code>null</code> will be returned. <p> If any error occurs while converting the value to a level, the <code>defaultValue</code> parameter, which may be <code>null</code>, is returned. <p> Case of <code>value</code> is insignificant for the level level, but is significant for the class name part, if present. <P> <DD><DL> <DT><B>Since:</B></DT> <DD>1.1</DD> </DL> </DD> </DL> <HR> <A NAME="toFileSize(java.lang.String, long)"><!-- --></A><H3> toFileSize</H3> <PRE> public static long <B>toFileSize</B>(<A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> value, long dEfault)</PRE> <DL> <DD><DL> </DL> </DD> </DL> <HR> <A NAME="findAndSubst(java.lang.String, java.util.Properties)"><!-- --></A><H3> findAndSubst</H3> <PRE> public static <A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>findAndSubst</B>(<A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> key, <A HREF="/usr/share/javadoc/java/java/util/Properties.html?is-external=true" title="class or interface in java.util">Properties</A> props)</PRE> <DL> <DD>Find the value corresponding to <code>key</code> in <code>props</code>. Then perform variable substitution on the found value. <P> <DD><DL> </DL> </DD> </DL> <HR> <A NAME="instantiateByClassName(java.lang.String, java.lang.Class, java.lang.Object)"><!-- --></A><H3> instantiateByClassName</H3> <PRE> public static <A HREF="/usr/share/javadoc/java/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> <B>instantiateByClassName</B>(<A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> className, <A HREF="/usr/share/javadoc/java/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A> superClass, <A HREF="/usr/share/javadoc/java/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> defaultValue)</PRE> <DL> <DD>Instantiate an object given a class name. Check that the <code>className</code> is a subclass of <code>superClass</code>. If that test fails or the object could not be instantiated, then <code>defaultValue</code> is returned. <P> <DD><DL> <DT><B>Parameters:</B><DD><CODE>className</CODE> - The fully qualified class name of the object to instantiate.<DD><CODE>superClass</CODE> - The class to which the new object should belong.<DD><CODE>defaultValue</CODE> - The object to return in case of non-fulfillment</DL> </DD> </DL> <HR> <A NAME="substVars(java.lang.String, java.util.Properties)"><!-- --></A><H3> substVars</H3> <PRE> public static <A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>substVars</B>(<A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> val, <A HREF="/usr/share/javadoc/java/java/util/Properties.html?is-external=true" title="class or interface in java.util">Properties</A> props) throws <A HREF="/usr/share/javadoc/java/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</A></PRE> <DL> <DD>Perform variable substitution in string <code>val</code> from the values of keys found in the system propeties. <p>The variable substitution delimeters are <b>${</b> and <b>}</b>. <p>For example, if the System properties contains "key=value", then the call <pre> String s = OptionConverter.substituteVars("Value of key is ${key}."); </pre> will set the variable <code>s</code> to "Value of key is value.". <p>If no value could be found for the specified key, then the <code>props</code> parameter is searched, if the value could not be found there, then substitution defaults to the empty string. <p>For example, if system propeties contains no value for the key "inexistentKey", then the call <pre> String s = OptionConverter.subsVars("Value of inexistentKey is [${inexistentKey}]"); </pre> will set <code>s</code> to "Value of inexistentKey is []" <p>An <A HREF="/usr/share/javadoc/java/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang"><CODE>IllegalArgumentException</CODE></A> is thrown if <code>val</code> contains a start delimeter "${" which is not balanced by a stop delimeter "}". </p> <p><b>Author</b> Avy Sharell</a></p> <P> <DD><DL> <DT><B>Parameters:</B><DD><CODE>val</CODE> - The string on which variable substitution is performed. <DT><B>Throws:</B> <DD><CODE><A HREF="/usr/share/javadoc/java/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</A></CODE> - if <code>val</code> is malformed.</DL> </DD> </DL> <HR> <A NAME="selectAndConfigure(java.net.URL, java.lang.String, org.apache.log4j.spi.LoggerRepository)"><!-- --></A><H3> selectAndConfigure</H3> <PRE> public static void <B>selectAndConfigure</B>(<A HREF="/usr/share/javadoc/java/java/net/URL.html?is-external=true" title="class or interface in java.net">URL</A> url, <A HREF="/usr/share/javadoc/java/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> clazz, <A HREF="../../../../org/apache/log4j/spi/LoggerRepository.html" title="interface in org.apache.log4j.spi">LoggerRepository</A> hierarchy)</PRE> <DL> <DD>Configure log4j given a URL. <p>The url must point to a file or resource which will be interpreted by a new instance of a log4j configurator. <p>All configurations steps are taken on the <code>hierarchy</code> passed as a parameter. <p> <P> <DD><DL> <DT><B>Parameters:</B><DD><CODE>url</CODE> - The location of the configuration file or resource.<DD><CODE>clazz</CODE> - The classname, of the log4j configurator which will parse the file or resource at <code>url</code>. This must be a subclass of <A HREF="../../../../org/apache/log4j/spi/Configurator.html" title="interface in org.apache.log4j.spi"><CODE>Configurator</CODE></A>, or null. If this value is null then a default configurator of <A HREF="../../../../org/apache/log4j/PropertyConfigurator.html" title="class in org.apache.log4j"><CODE>PropertyConfigurator</CODE></A> is used, unless the filename pointed to by <code>url</code> ends in '.xml', in which case <A HREF="../../../../org/apache/log4j/xml/DOMConfigurator.html" title="class in org.apache.log4j.xml"><CODE>DOMConfigurator</CODE></A> is used.<DD><CODE>hierarchy</CODE> - The <A HREF="../../../../org/apache/log4j/Hierarchy.html" title="class in org.apache.log4j"><CODE>Hierarchy</CODE></A> to act on.<DT><B>Since:</B></DT> <DD>1.1.4</DD> </DL> </DD> </DL> <!-- ========= END OF CLASS DATA ========= --> <HR> <!-- ======= START OF BOTTOM NAVBAR ====== --> <A NAME="navbar_bottom"><!-- --></A> <A HREF="#skip-navbar_bottom" title="Skip navigation links"></A> <TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""> <TR> <TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A NAME="navbar_bottom_firstrow"><!-- --></A> <TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/OptionConverter.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR> </TABLE> </TD> <TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM> <b>Log4j 1.2.14</b></EM> </TD> </TR> <TR> <TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../org/apache/log4j/helpers/OnlyOnceErrorHandler.html" title="class in org.apache.log4j.helpers"><B>PREV CLASS</B></A> <A HREF="../../../../org/apache/log4j/helpers/PatternConverter.html" title="class in org.apache.log4j.helpers"><B>NEXT CLASS</B></A></FONT></TD> <TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../index.html?org/apache/log4j/helpers/OptionConverter.html" target="_top"><B>FRAMES</B></A> <A HREF="OptionConverter.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A>'); } //--> </SCRIPT> <NOSCRIPT> <A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A> </NOSCRIPT> </FONT></TD> </TR> <TR> <TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: NESTED | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD> <TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> DETAIL: FIELD | CONSTR | <A HREF="#method_detail">METHOD</A></FONT></TD> </TR> </TABLE> <A NAME="skip-navbar_bottom"></A> <!-- ======== END OF BOTTOM NAVBAR ======= --> <HR> Copyright 2000-2005 Apache Software Foundation. </BODY> </HTML>