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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN">
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: Class  AdaptiveClassLoader
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  SUMMARY: &nbsp;<A HREF="#inner_class_summary">INNER</A>&nbsp;|&nbsp;<A HREF="#field_summary">FIELD</A>&nbsp;|&nbsp;<A HREF="#constructor_summary">CONSTR</A>&nbsp;|&nbsp;<A HREF="#method_summary">METHOD</A></FONT></TD>
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org.apache.java.lang</FONT>
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Class  AdaptiveClassLoader</H2>
<PRE>
java.lang.Object
  |
  +--java.lang.ClassLoader
        |
        +--<B>org.apache.java.lang.AdaptiveClassLoader</B>
</PRE>
<HR>
<DL>
<DT>public class <B>AdaptiveClassLoader</B><DT>extends java.lang.ClassLoader</DL>

<P>
A class loader that loads classes from directories and/or zip-format
 file such as JAR file. It tracks the modification time of the classes
 it loads to permit reloading through re-instantiation.
 <P>
 When the classloader reports its creator that one of the classes it
 has loaded has changed on disk, it should discard the classloader
 and create a new instance using <CODE>reinstantiate</CODE>.
 The classes are then reloaded into the new classloader as required.

 <P>The classloader can also load resources, which are a means
 for packaging application data such as images within a jar file
 or directory.

 <P>The classloader always first tries to load classes and resources
 from the system, and uses it's own path if that fails. This is also
 done if an empty repository is passed at construction.

 <P><B>How autoreload works:</B></P>

 <P>The Java VM considers two classes the same if they have the same
 fully-qualified name <B>and</B> if they were loaded from the same
 <CODE>ClassLoader</CODE>.

 <P>There is no way for a classloader to 'undefine' a class once it
 has been loaded.  However, the servlet engine can discard a
 classloader and the classes it contains, causing the

 <P>The <CODE>JServServletManager</CODE> creates a new instance of
 the classloader each time it detects that any of the loaded classes
 have changed.

 <P>Before terminating, all servlets are destroyed.

 <P>According to the Java Language Specification (JLS), classes may
 be garbage-collected when there are no longer any instances of that
 class and the <CODE>java.lang.Class</CODE> object is finalizable.
 It is intended that this be the case when a <CODE>JServClassLoader</CODE>
 is discarded.

 <P>Many VM releases did not implement class garbage collection
 properly.  In such a VM, the memory usage will continue to grow if
 autoreloading is enable.  Running the VM with
 <CODE>-verbosegc</CODE> (or the corresponding option for
 non-Javasoft VMs) may give some debugging information.

 <P>It is important that the <CODE>destroy</CODE> method be
 implemented properly, as servlets may be destroyed and
 reinitialized several times in the life of a VM.
<P>
<DL>
<DT><B>Version: </B><DD>$Revision: 1.15 $ $Date: 1999/12/08 20:33:25 $</DD>
<DT><B>See Also: </B><DD><CODE>ClassLoader</CODE></DL>
<HR>

<P>
<!-- ======== INNER CLASS SUMMARY ======== -->

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<B>Inner Class Summary</B></FONT></TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private static&nbsp;class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.ClassCacheEntry.html">AdaptiveClassLoader.ClassCacheEntry</A></B></CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Private class used to maintain information about the classes that
 we loaded.</TD>
</TR>
</TABLE>
&nbsp;<A NAME="inner_classes_inherited_from_class_java.lang.ClassLoader"><!-- --></A>
<TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
<TR BGCOLOR="#EEEEFF" ID="TableSubHeadingColor">
<TD><B>Inner classes inherited from class java.lang.ClassLoader</B></TD>
</TR>
<TR BGCOLOR="white" ID="TableRowColor">
<TD><CODE><B>java.lang.ClassLoader.NativeLibrary</B></CODE></TD>
</TR>
</TABLE>
&nbsp;
<!-- =========== FIELD SUMMARY =========== -->

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<TD COLSPAN=2><FONT SIZE="+2">
<B>Field Summary</B></FONT></TD>
</TR>
<TR BGCOLOR="white" ID="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private &nbsp;java.util.Hashtable</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.html#cache">cache</A></B></CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Cache of the loaded classes.</TD>
</TR>
<TR BGCOLOR="white" ID="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private &nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.html#generation">generation</A></B></CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Generation number of the classloader, used to distinguish between
 different instances.</TD>
</TR>
<TR BGCOLOR="white" ID="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private static&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.html#generationCounter">generationCounter</A></B></CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Generation counter, incremented for each classloader as they are
 created.</TD>
</TR>
<TR BGCOLOR="white" ID="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private &nbsp;java.util.Vector</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.html#repository">repository</A></B></CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The classpath which this classloader searches for class definitions.</TD>
</TR>
</TABLE>
&nbsp;<A NAME="fields_inherited_from_class_java.lang.ClassLoader"><!-- --></A>
<TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
<TR BGCOLOR="#EEEEFF" ID="TableSubHeadingColor">
<TD><B>Fields inherited from class java.lang.ClassLoader</B></TD>
</TR>
<TR BGCOLOR="white" ID="TableRowColor">
<TD><CODE>bootstrapClassPath,  
classes,  
defaultDomain,  
defaultPermissions,  
getClassLoaderPerm,  
initialized,  
loadedLibraryNames,  
nativeLibraries,  
nativeLibraryContext,  
packages,  
parent,  
scl,  
sclSet,  
sys_paths,  
systemNativeLibraries,  
usr_paths</CODE></TD>
</TR>
</TABLE>
&nbsp;
<!-- ======== CONSTRUCTOR SUMMARY ======== -->

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<B>Constructor Summary</B></FONT></TD>
</TR>
<TR BGCOLOR="white" ID="TableRowColor">
<TD><CODE><B><A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.html#AdaptiveClassLoader(java.util.Vector)">AdaptiveClassLoader</A></B>(java.util.Vector&nbsp;classRepository)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Creates a new class loader that will load classes from specified
 class repositories.</TD>
</TR>
</TABLE>
&nbsp;
<!-- ========== METHOD SUMMARY =========== -->

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<B>Method Summary</B></FONT></TD>
</TR>
<TR BGCOLOR="white" ID="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;java.net.URL</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.html#getResource(java.lang.String)">getResource</A></B>(java.lang.String&nbsp;name)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Find a resource with a given name.</TD>
</TR>
<TR BGCOLOR="white" ID="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;java.io.InputStream</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.html#getResourceAsStream(java.lang.String)">getResourceAsStream</A></B>(java.lang.String&nbsp;name)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Get an InputStream on a given resource.</TD>
</TR>
<TR BGCOLOR="white" ID="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private &nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.html#isZipOrJarArchive(java.io.File)">isZipOrJarArchive</A></B>(java.io.File&nbsp;file)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Test if a file is a ZIP or JAR archive.</TD>
</TR>
<TR BGCOLOR="white" ID="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private &nbsp;byte[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.html#loadBytesFromStream(java.io.InputStream, int)">loadBytesFromStream</A></B>(java.io.InputStream&nbsp;in,
                    int&nbsp;length)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Loads all the bytes of an InputStream.</TD>
</TR>
<TR BGCOLOR="white" ID="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected &nbsp;java.lang.Class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.html#loadClass(java.lang.String, boolean)">loadClass</A></B>(java.lang.String&nbsp;name,
          boolean&nbsp;resolve)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Resolves the specified name to a Class.</TD>
</TR>
<TR BGCOLOR="white" ID="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private &nbsp;byte[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.html#loadClassFromDirectory(java.io.File, java.lang.String, org.apache.java.lang.AdaptiveClassLoader.ClassCacheEntry)">loadClassFromDirectory</A></B>(java.io.File&nbsp;dir,
                       java.lang.String&nbsp;name,
                       <A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.ClassCacheEntry.html">AdaptiveClassLoader.ClassCacheEntry</A>&nbsp;cache)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Tries to load the class from a directory.</TD>
</TR>
<TR BGCOLOR="white" ID="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private &nbsp;byte[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.html#loadClassFromZipfile(java.io.File, java.lang.String, org.apache.java.lang.AdaptiveClassLoader.ClassCacheEntry)">loadClassFromZipfile</A></B>(java.io.File&nbsp;file,
                     java.lang.String&nbsp;name,
                     <A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.ClassCacheEntry.html">AdaptiveClassLoader.ClassCacheEntry</A>&nbsp;cache)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Tries to load the class from a zip file.</TD>
</TR>
<TR BGCOLOR="white" ID="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private &nbsp;java.io.InputStream</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.html#loadResourceFromDirectory(java.io.File, java.lang.String)">loadResourceFromDirectory</A></B>(java.io.File&nbsp;dir,
                          java.lang.String&nbsp;name)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Loads resource from a directory.</TD>
</TR>
<TR BGCOLOR="white" ID="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private &nbsp;java.io.InputStream</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.html#loadResourceFromZipfile(java.io.File, java.lang.String)">loadResourceFromZipfile</A></B>(java.io.File&nbsp;file,
                        java.lang.String&nbsp;name)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Loads resource from a zip file</TD>
</TR>
<TR BGCOLOR="white" ID="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private &nbsp;java.lang.Class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.html#loadSystemClass(java.lang.String, boolean)">loadSystemClass</A></B>(java.lang.String&nbsp;name,
                boolean&nbsp;resolve)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Load a class using the system classloader.</TD>
</TR>
<TR BGCOLOR="white" ID="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.html">AdaptiveClassLoader</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.html#reinstantiate()">reinstantiate</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Re-instantiate this class loader.</TD>
</TR>
<TR BGCOLOR="white" ID="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private &nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.html#securityAllowsClass(java.lang.String)">securityAllowsClass</A></B>(java.lang.String&nbsp;className)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Checks whether a classloader is allowed to define a given class,
 within the security manager restrictions.</TD>
</TR>
<TR BGCOLOR="white" ID="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.html#shouldReload()">shouldReload</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Check whether the classloader should be reinstantiated.</TD>
</TR>
<TR BGCOLOR="white" ID="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.html#shouldReload(java.lang.String)">shouldReload</A></B>(java.lang.String&nbsp;classname)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Check to see if a given class should be reloaded because of a
 modification to the original class.</TD>
</TR>
</TABLE>
&nbsp;<A NAME="methods_inherited_from_class_java.lang.ClassLoader"><!-- --></A>
<TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
<TR BGCOLOR="#EEEEFF" ID="TableSubHeadingColor">
<TD><B>Methods inherited from class java.lang.ClassLoader</B></TD>
</TR>
<TR BGCOLOR="white" ID="TableRowColor">
<TD><CODE><clinit>, 
addClass, 
check, 
defineClass, 
defineClass, 
defineClass, 
defineClass0, 
definePackage, 
findBootstrapClass, 
findClass, 
findLibrary, 
findLoadedClass, 
findNative, 
findResource, 
findResources, 
findSystemClass, 
getBootstrapClassPath, 
getBootstrapResource, 
getBootstrapResources, 
getCallerClassLoader, 
getDefaultDomain, 
getGetClassLoaderPerm, 
getPackage, 
getPackages, 
getParent, 
getResources, 
getSystemClassLoader, 
getSystemResource, 
getSystemResourceAsStream, 
getSystemResources, 
initializePath, 
isAncestor, 
loadClass, 
loadLibrary, 
loadLibrary0, 
resolveClass, 
resolveClass0, 
setSigners</CODE></TD>
</TR>
</TABLE>
&nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
<TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
<TR BGCOLOR="#EEEEFF" ID="TableSubHeadingColor">
<TD><B>Methods inherited from class java.lang.Object</B></TD>
</TR>
<TR BGCOLOR="white" ID="TableRowColor">
<TD><CODE>clone, 
equals, 
finalize, 
getClass, 
hashCode, 
notify, 
notifyAll, 
registerNatives, 
toString, 
wait, 
wait, 
wait</CODE></TD>
</TR>
</TABLE>
&nbsp;
<P>

<!-- ============ FIELD DETAIL =========== -->

<A NAME="field_detail"><!-- --></A>
<TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
<TR BGCOLOR="#CCCCFF" ID="TableHeadingColor">
<TD COLSPAN=1><FONT SIZE="+2">
<B>Field Detail</B></FONT></TD>
</TR>
</TABLE>

<A NAME="generationCounter"><!-- --></A><H3>
generationCounter</H3>
<PRE>
private static int <B>generationCounter</B></PRE>
<DL>
<DD>Generation counter, incremented for each classloader as they are
 created.</DL>
<HR>

<A NAME="generation"><!-- --></A><H3>
generation</H3>
<PRE>
private int <B>generation</B></PRE>
<DL>
<DD>Generation number of the classloader, used to distinguish between
 different instances.</DL>
<HR>

<A NAME="cache"><!-- --></A><H3>
cache</H3>
<PRE>
private java.util.Hashtable <B>cache</B></PRE>
<DL>
<DD>Cache of the loaded classes. This contains ClassCacheEntry keyed
 by class names.</DL>
<HR>

<A NAME="repository"><!-- --></A><H3>
repository</H3>
<PRE>
private java.util.Vector <B>repository</B></PRE>
<DL>
<DD>The classpath which this classloader searches for class definitions.
 Each element of the vector should be either a directory, a .zip
 file, or a .jar file.
 <p>
 It may be empty when only system classes are controlled.</DL>

<!-- ========= CONSTRUCTOR DETAIL ======== -->

<A NAME="constructor_detail"><!-- --></A>
<TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
<TR BGCOLOR="#CCCCFF" ID="TableHeadingColor">
<TD COLSPAN=1><FONT SIZE="+2">
<B>Constructor Detail</B></FONT></TD>
</TR>
</TABLE>

<A NAME="AdaptiveClassLoader(java.util.Vector)"><!-- --></A><H3>
AdaptiveClassLoader</H3>
<PRE>
public <B>AdaptiveClassLoader</B>(java.util.Vector&nbsp;classRepository)
                    throws java.lang.IllegalArgumentException</PRE>
<DL>
<DD>Creates a new class loader that will load classes from specified
 class repositories.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>classRepository</CODE> - An set of File classes indicating
        directories and/or zip/jar files. It may be empty when
        only system classes are loaded.</DL>
</DD>
</DL>

<!-- ============ METHOD DETAIL ========== -->

<A NAME="method_detail"><!-- --></A>
<TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
<TR BGCOLOR="#CCCCFF" ID="TableHeadingColor">
<TD COLSPAN=1><FONT SIZE="+2">
<B>Method Detail</B></FONT></TD>
</TR>
</TABLE>

<A NAME="isZipOrJarArchive(java.io.File)"><!-- --></A><H3>
isZipOrJarArchive</H3>
<PRE>
private boolean <B>isZipOrJarArchive</B>(java.io.File&nbsp;file)</PRE>
<DL>
<DD>Test if a file is a ZIP or JAR archive.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>file</CODE> - the file to be tested.<DT><B>Returns:</B><DD>true if the file is a ZIP/JAR archive, false otherwise.</DL>
</DD>
</DL>
<HR>

<A NAME="shouldReload(java.lang.String)"><!-- --></A><H3>
shouldReload</H3>
<PRE>
public boolean <B>shouldReload</B>(java.lang.String&nbsp;classname)</PRE>
<DL>
<DD>Check to see if a given class should be reloaded because of a
 modification to the original class.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>className</CODE> - The name of the class to check for modification.</DL>
</DD>
</DL>
<HR>

<A NAME="shouldReload()"><!-- --></A><H3>
shouldReload</H3>
<PRE>
public boolean <B>shouldReload</B>()</PRE>
<DL>
<DD>Check whether the classloader should be reinstantiated.
 <P>
 The classloader must be replaced if there is any class whose
 origin file has changed since it was last loaded.</DL>
<HR>

<A NAME="reinstantiate()"><!-- --></A><H3>
reinstantiate</H3>
<PRE>
public <A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.html">AdaptiveClassLoader</A> <B>reinstantiate</B>()</PRE>
<DL>
<DD>Re-instantiate this class loader.
 <p>
 This method creates a new instance
 of the class loader that will load classes form the same path
 as this one.</DL>
<HR>

<A NAME="loadClass(java.lang.String, boolean)"><!-- --></A><H3>
loadClass</H3>
<PRE>
protected java.lang.Class <B>loadClass</B>(java.lang.String&nbsp;name,
                                    boolean&nbsp;resolve)
                             throws java.lang.ClassNotFoundException</PRE>
<DL>
<DD>Resolves the specified name to a Class. The method loadClass()
 is called by the virtual machine.  As an abstract method,
 loadClass() must be defined in a subclass of ClassLoader.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>name</CODE> - the name of the desired Class.<DD><CODE>resolve</CODE> - true if the Class needs to be resolved;
             false if the virtual machine just wants to determine
             whether the class exists or not<DT><B>Returns:</B><DD>the resulting Class.<DT><B>Throws:</B><DD>java.lang.ClassNotFoundException - if the class loader cannot
             find a the requested class.<DT><B>Overrides:</B><DD>loadClass in class java.lang.ClassLoader</DL>
</DD>
</DL>
<HR>

<A NAME="loadSystemClass(java.lang.String, boolean)"><!-- --></A><H3>
loadSystemClass</H3>
<PRE>
private java.lang.Class <B>loadSystemClass</B>(java.lang.String&nbsp;name,
                                        boolean&nbsp;resolve)
                                 throws java.lang.NoClassDefFoundError,
                                        java.lang.ClassNotFoundException</PRE>
<DL>
<DD>Load a class using the system classloader.<DD><DL>
<DT><B>Throws:</B><DD>java.lang.ClassNotFoundException - if the class loader cannot
             find a the requested class.<DD>java.lang.NoClassDefFoundError - if the class loader cannot
             find a definition for the class.</DL>
</DD>
</DL>
<HR>

<A NAME="securityAllowsClass(java.lang.String)"><!-- --></A><H3>
securityAllowsClass</H3>
<PRE>
private boolean <B>securityAllowsClass</B>(java.lang.String&nbsp;className)</PRE>
<DL>
<DD>Checks whether a classloader is allowed to define a given class,
 within the security manager restrictions.</DL>
<HR>

<A NAME="loadClassFromDirectory(java.io.File, java.lang.String, org.apache.java.lang.AdaptiveClassLoader.ClassCacheEntry)"><!-- --></A><H3>
loadClassFromDirectory</H3>
<PRE>
private byte[] <B>loadClassFromDirectory</B>(java.io.File&nbsp;dir,
                                      java.lang.String&nbsp;name,
                                      <A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.ClassCacheEntry.html">AdaptiveClassLoader.ClassCacheEntry</A>&nbsp;cache)
                               throws java.io.IOException</PRE>
<DL>
<DD>Tries to load the class from a directory.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>dir</CODE> - The directory that contains classes.<DD><CODE>name</CODE> - The classname<DD><CODE>cache</CODE> - The cache entry to set the file if successful.</DL>
</DD>
</DL>
<HR>

<A NAME="loadClassFromZipfile(java.io.File, java.lang.String, org.apache.java.lang.AdaptiveClassLoader.ClassCacheEntry)"><!-- --></A><H3>
loadClassFromZipfile</H3>
<PRE>
private byte[] <B>loadClassFromZipfile</B>(java.io.File&nbsp;file,
                                    java.lang.String&nbsp;name,
                                    <A HREF="../../../../org/apache/java/lang/AdaptiveClassLoader.ClassCacheEntry.html">AdaptiveClassLoader.ClassCacheEntry</A>&nbsp;cache)
                             throws java.io.IOException</PRE>
<DL>
<DD>Tries to load the class from a zip file.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>file</CODE> - The zipfile that contains classes.<DD><CODE>name</CODE> - The classname<DD><CODE>cache</CODE> - The cache entry to set the file if successful.</DL>
</DD>
</DL>
<HR>

<A NAME="loadBytesFromStream(java.io.InputStream, int)"><!-- --></A><H3>
loadBytesFromStream</H3>
<PRE>
private byte[] <B>loadBytesFromStream</B>(java.io.InputStream&nbsp;in,
                                   int&nbsp;length)
                            throws java.io.IOException</PRE>
<DL>
<DD>Loads all the bytes of an InputStream.</DL>
<HR>

<A NAME="getResourceAsStream(java.lang.String)"><!-- --></A><H3>
getResourceAsStream</H3>
<PRE>
public java.io.InputStream <B>getResourceAsStream</B>(java.lang.String&nbsp;name)</PRE>
<DL>
<DD>Get an InputStream on a given resource.  Will return null if no
 resource with this name is found.
 <p>
 The JServClassLoader translate the resource's name to a file
 or a zip entry. It looks for the resource in all its repository
 entry.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>name</CODE> - the name of the resource, to be used as is.<DT><B>Returns:</B><DD>an InputStream on the resource, or null if not found.<DT><B>Overrides:</B><DD>getResourceAsStream in class java.lang.ClassLoader<DT><B>See Also: </B><DD><CODE>Class.getResourceAsStream(String)</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="loadResourceFromDirectory(java.io.File, java.lang.String)"><!-- --></A><H3>
loadResourceFromDirectory</H3>
<PRE>
private java.io.InputStream <B>loadResourceFromDirectory</B>(java.io.File&nbsp;dir,
                                                      java.lang.String&nbsp;name)</PRE>
<DL>
<DD>Loads resource from a directory.</DL>
<HR>

<A NAME="loadResourceFromZipfile(java.io.File, java.lang.String)"><!-- --></A><H3>
loadResourceFromZipfile</H3>
<PRE>
private java.io.InputStream <B>loadResourceFromZipfile</B>(java.io.File&nbsp;file,
                                                    java.lang.String&nbsp;name)</PRE>
<DL>
<DD>Loads resource from a zip file</DL>
<HR>

<A NAME="getResource(java.lang.String)"><!-- --></A><H3>
getResource</H3>
<PRE>
public java.net.URL <B>getResource</B>(java.lang.String&nbsp;name)</PRE>
<DL>
<DD>Find a resource with a given name.  The return is a URL to the
 resource. Doing a getContent() on the URL may return an Image,
 an AudioClip,or an InputStream.
 <p>
 This classloader looks for the resource only in the directory
 repository for this resource.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>name</CODE> - the name of the resource, to be used as is.<DT><B>Returns:</B><DD>an URL on the resource, or null if not found.<DT><B>Overrides:</B><DD>getResource in class java.lang.ClassLoader</DL>
</DD>
</DL>
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