The EnvironmentCheck.java Java example source code
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/*
* 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
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* Unless required by applicable law or agreed to in writing, software
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* limitations under the License.
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/*
* $Id: EnvironmentCheck.java,v 1.2.4.1 2005/09/09 07:13:59 pvedula Exp $
*/
package com.sun.org.apache.xalan.internal.xslt;
import com.sun.org.apache.xalan.internal.utils.ObjectFactory;
import com.sun.org.apache.xalan.internal.utils.SecuritySupport;
import java.io.File;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.StringTokenizer;
import java.util.Vector;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
/**
* Utility class to report simple information about the environment.
* Simplistic reporting about certain classes found in your JVM may
* help answer some FAQs for simple problems.
*
* <p>Usage-command line:
* <code>
* java com.sun.org.apache.xalan.internal.xslt.EnvironmentCheck [-out outFile]
* </code>
*
* <p>Usage-from program:
* <code>
* boolean environmentOK =
* (new EnvironmentCheck()).checkEnvironment(yourPrintWriter);
* </code>
*
* <p>Usage-from stylesheet:
* <code>
* <?xml version="1.0"?>
* <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"
* xmlns:xalan="http://xml.apache.org/xalan"
* exclude-result-prefixes="xalan">
* <xsl:output indent="yes"/>
* <xsl:template match="/">
* <xsl:copy-of select="xalan:checkEnvironment()"/>
* </xsl:template>
* </xsl:stylesheet>
* </pre>
*
* <p>Xalan users reporting problems are encouraged to use this class
* to see if there are potential problems with their actual
* Java environment <b>before reporting a bug. Note that you
* should both check from the JVM/JRE's command line as well as
* temporarily calling checkEnvironment() directly from your code,
* since the classpath may differ (especially for servlets, etc).</p>
*
* <p>Also see http://xml.apache.org/xalan-j/faq.html
*
* <p>Note: This class is pretty simplistic:
* results are not necessarily definitive nor will it find all
* problems related to environment setup. Also, you should avoid
* calling this in deployed production code, both because it is
* quite slow and because it forces classes to get loaded.</p>
*
* <p>Note: This class explicitly has very limited compile-time
* dependencies to enable easy compilation and usage even when
* Xalan, DOM/SAX/JAXP, etc. are not present.</p>
*
* <p>Note: for an improved version of this utility, please see
* the xml-commons' project Which utility which does the same kind
* of thing but in a much simpler manner.</p>
*
* @author Shane_Curcuru@us.ibm.com
* @version $Id: EnvironmentCheck.java,v 1.10 2010-11-01 04:34:13 joehw Exp $
*/
public class EnvironmentCheck
{
/**
* Command line runnability: checks for [-out outFilename] arg.
* <p>Command line entrypoint; Sets output and calls
* {@link #checkEnvironment(PrintWriter)}.</p>
* @param args command line args
*/
public static void main(String[] args)
{
// Default to System.out, autoflushing
PrintWriter sendOutputTo = new PrintWriter(System.out, true);
// Read our simplistic input args, if supplied
for (int i = 0; i < args.length; i++)
{
if ("-out".equalsIgnoreCase(args[i]))
{
i++;
if (i < args.length)
{
try
{
sendOutputTo = new PrintWriter(new FileWriter(args[i], true));
}
catch (Exception e)
{
System.err.println("# WARNING: -out " + args[i] + " threw "
+ e.toString());
}
}
else
{
System.err.println(
"# WARNING: -out argument should have a filename, output sent to console");
}
}
}
EnvironmentCheck app = new EnvironmentCheck();
app.checkEnvironment(sendOutputTo);
}
/**
* Programmatic entrypoint: Report on basic Java environment
* and CLASSPATH settings that affect Xalan.
*
* <p>Note that this class is not advanced enough to tell you
* everything about the environment that affects Xalan, and
* sometimes reports errors that will not actually affect
* Xalan's behavior. Currently, it very simplistically
* checks the JVM's environment for some basic properties and
* logs them out; it will report a problem if it finds a setting
* or .jar file that is <i>likely to cause problems.
*
* <p>Advanced users can peruse the code herein to help them
* investigate potential environment problems found; other users
* may simply send the output from this tool along with any bugs
* they submit to help us in the debugging process.</p>
*
* @param pw PrintWriter to send output to; can be sent to a
* file that will look similar to a Properties file; defaults
* to System.out if null
* @return true if your environment appears to have no major
* problems; false if potential environment problems found
* @see #getEnvironmentHash()
*/
public boolean checkEnvironment(PrintWriter pw)
{
// Use user-specified output writer if non-null
if (null != pw)
outWriter = pw;
// Setup a hash to store various environment information in
Hashtable hash = getEnvironmentHash();
// Check for ERROR keys in the hashtable, and print report
boolean environmentHasErrors = writeEnvironmentReport(hash);
if (environmentHasErrors)
{
// Note: many logMsg calls have # at the start to
// fake a property-file like output
logMsg("# WARNING: Potential problems found in your environment!");
logMsg("# Check any 'ERROR' items above against the Xalan FAQs");
logMsg("# to correct potential problems with your classes/jars");
logMsg("# http://xml.apache.org/xalan-j/faq.html");
if (null != outWriter)
outWriter.flush();
return false;
}
else
{
logMsg("# YAHOO! Your environment seems to be OK.");
if (null != outWriter)
outWriter.flush();
return true;
}
}
/**
* Fill a hash with basic environment settings that affect Xalan.
*
* <p>Worker method called from various places.
* <p>Various system and CLASSPATH, etc. properties are put into
* the hash as keys with a brief description of the current state
* of that item as the value. Any serious problems will be put in
* with a key that is prefixed with {@link #ERROR 'ERROR.'} so it
* stands out in any resulting report; also a key with just that
* constant will be set as well for any error.</p>
* <p>Note that some legitimate cases are flaged as potential
* errors - namely when a developer recompiles xalan.jar on their
* own - and even a non-error state doesn't guaruntee that
* everything in the environment is correct. But this will help
* point out the most common classpath and system property
* problems that we've seen.</p>
*
* @return Hashtable full of useful environment info about Xalan
* and related system properties, etc.
*/
public Hashtable getEnvironmentHash()
{
// Setup a hash to store various environment information in
Hashtable hash = new Hashtable();
// Call various worker methods to fill in the hash
// These are explicitly separate for maintenance and so
// advanced users could call them standalone
checkJAXPVersion(hash);
checkProcessorVersion(hash);
checkParserVersion(hash);
checkAntVersion(hash);
if (!checkDOML3(hash)) {
checkDOMVersion(hash);
}
checkSAXVersion(hash);
checkSystemProperties(hash);
return hash;
}
/**
* Dump a basic Xalan environment report to outWriter.
*
* <p>This dumps a simple header and then each of the entries in
* the Hashtable to our PrintWriter; it does special processing
* for entries that are .jars found in the classpath.</p>
*
* @param h Hashtable of items to report on; presumably
* filled in by our various check*() methods
* @return true if your environment appears to have no major
* problems; false if potential environment problems found
* @see #appendEnvironmentReport(Node, Document, Hashtable)
* for an equivalent that appends to a Node instead
*/
protected boolean writeEnvironmentReport(Hashtable h)
{
if (null == h)
{
logMsg("# ERROR: writeEnvironmentReport called with null Hashtable");
return false;
}
boolean errors = false;
logMsg(
"#---- BEGIN writeEnvironmentReport($Revision: 1.10 $): Useful stuff found: ----");
// Fake the Properties-like output
for (Enumeration keys = h.keys();
keys.hasMoreElements();
/* no increment portion */
)
{
Object key = keys.nextElement();
String keyStr = (String) key;
try
{
// Special processing for classes found..
if (keyStr.startsWith(FOUNDCLASSES))
{
Vector v = (Vector) h.get(keyStr);
errors |= logFoundJars(v, keyStr);
}
// ..normal processing for all other entries
else
{
// Note: we could just check for the ERROR key by itself,
// since we now set that, but since we have to go
// through the whole hash anyway, do it this way,
// which is safer for maintenance
if (keyStr.startsWith(ERROR))
{
errors = true;
}
logMsg(keyStr + "=" + h.get(keyStr));
}
}
catch (Exception e)
{
logMsg("Reading-" + key + "= threw: " + e.toString());
}
}
logMsg(
"#----- END writeEnvironmentReport: Useful properties found: -----");
return errors;
}
/** Prefixed to hash keys that signify serious problems. */
public static final String ERROR = "ERROR.";
/** Added to descriptions that signify potential problems. */
public static final String WARNING = "WARNING.";
/** Value for any error found. */
public static final String ERROR_FOUND = "At least one error was found!";
/** Prefixed to hash keys that signify version numbers. */
public static final String VERSION = "version.";
/** Prefixed to hash keys that signify .jars found in classpath. */
public static final String FOUNDCLASSES = "foundclasses.";
/** Marker that a class or .jar was found. */
public static final String CLASS_PRESENT = "present-unknown-version";
/** Marker that a class or .jar was not found. */
public static final String CLASS_NOTPRESENT = "not-present";
/** Listing of common .jar files that include Xalan-related classes. */
public String[] jarNames =
{
"xalan.jar", "xalansamples.jar", "xalanj1compat.jar", "xalanservlet.jar",
"serializer.jar", // Serializer (shared between Xalan & Xerces)
"xerces.jar", // Xerces-J 1.x
"xercesImpl.jar", // Xerces-J 2.x
"testxsl.jar",
"crimson.jar",
"lotusxsl.jar",
"jaxp.jar", "parser.jar", "dom.jar", "sax.jar", "xml.jar",
"xml-apis.jar",
"xsltc.jar"
};
/**
* Print out report of .jars found in a classpath.
*
* Takes the information encoded from a checkPathForJars()
* call and dumps it out to our PrintWriter.
*
* @param v Vector of Hashtables of .jar file info
* @param desc description to print out in header
*
* @return false if OK, true if any .jars were reported
* as having errors
* @see #checkPathForJars(String, String[])
*/
protected boolean logFoundJars(Vector v, String desc)
{
if ((null == v) || (v.size() < 1))
return false;
boolean errors = false;
logMsg("#---- BEGIN Listing XML-related jars in: " + desc + " ----");
for (int i = 0; i < v.size(); i++)
{
Hashtable subhash = (Hashtable) v.elementAt(i);
for (Enumeration keys = subhash.keys();
keys.hasMoreElements();
/* no increment portion */
)
{
Object key = keys.nextElement();
String keyStr = (String) key;
try
{
if (keyStr.startsWith(ERROR))
{
errors = true;
}
logMsg(keyStr + "=" + subhash.get(keyStr));
}
catch (Exception e)
{
errors = true;
logMsg("Reading-" + key + "= threw: " + e.toString());
}
}
}
logMsg("#----- END Listing XML-related jars in: " + desc + " -----");
return errors;
}
/**
* Stylesheet extension entrypoint: Dump a basic Xalan
* environment report from getEnvironmentHash() to a Node.
*
* <p>Copy of writeEnvironmentReport that creates a Node suitable
* for other processing instead of a properties-like text output.
* </p>
* @param container Node to append our report to
* @param factory Document providing createElement, etc. services
* @param h Hash presumably from {@link #getEnvironmentHash()}
* @see #writeEnvironmentReport(Hashtable)
* for an equivalent that writes to a PrintWriter instead
*/
public void appendEnvironmentReport(Node container, Document factory, Hashtable h)
{
if ((null == container) || (null == factory))
{
return;
}
try
{
Element envCheckNode = factory.createElement("EnvironmentCheck");
envCheckNode.setAttribute("version", "$Revision: 1.10 $");
container.appendChild(envCheckNode);
if (null == h)
{
Element statusNode = factory.createElement("status");
statusNode.setAttribute("result", "ERROR");
statusNode.appendChild(factory.createTextNode("appendEnvironmentReport called with null Hashtable!"));
envCheckNode.appendChild(statusNode);
return;
}
boolean errors = false;
Element hashNode = factory.createElement("environment");
envCheckNode.appendChild(hashNode);
for (Enumeration keys = h.keys();
keys.hasMoreElements();
/* no increment portion */
)
{
Object key = keys.nextElement();
String keyStr = (String) key;
try
{
// Special processing for classes found..
if (keyStr.startsWith(FOUNDCLASSES))
{
Vector v = (Vector) h.get(keyStr);
// errors |= logFoundJars(v, keyStr);
errors |= appendFoundJars(hashNode, factory, v, keyStr);
}
// ..normal processing for all other entries
else
{
// Note: we could just check for the ERROR key by itself,
// since we now set that, but since we have to go
// through the whole hash anyway, do it this way,
// which is safer for maintenance
if (keyStr.startsWith(ERROR))
{
errors = true;
}
Element node = factory.createElement("item");
node.setAttribute("key", keyStr);
node.appendChild(factory.createTextNode((String)h.get(keyStr)));
hashNode.appendChild(node);
}
}
catch (Exception e)
{
errors = true;
Element node = factory.createElement("item");
node.setAttribute("key", keyStr);
node.appendChild(factory.createTextNode(ERROR + " Reading " + key + " threw: " + e.toString()));
hashNode.appendChild(node);
}
} // end of for...
Element statusNode = factory.createElement("status");
statusNode.setAttribute("result", (errors ? "ERROR" : "OK" ));
envCheckNode.appendChild(statusNode);
}
catch (Exception e2)
{
System.err.println("appendEnvironmentReport threw: " + e2.toString());
e2.printStackTrace();
}
}
/**
* Print out report of .jars found in a classpath.
*
* Takes the information encoded from a checkPathForJars()
* call and dumps it out to our PrintWriter.
*
* @param container Node to append our report to
* @param factory Document providing createElement, etc. services
* @param v Vector of Hashtables of .jar file info
* @param desc description to print out in header
*
* @return false if OK, true if any .jars were reported
* as having errors
* @see #checkPathForJars(String, String[])
*/
protected boolean appendFoundJars(Node container, Document factory,
Vector v, String desc)
{
if ((null == v) || (v.size() < 1))
return false;
boolean errors = false;
for (int i = 0; i < v.size(); i++)
{
Hashtable subhash = (Hashtable) v.elementAt(i);
for (Enumeration keys = subhash.keys();
keys.hasMoreElements();
/* no increment portion */
)
{
Object key = keys.nextElement();
try
{
String keyStr = (String) key;
if (keyStr.startsWith(ERROR))
{
errors = true;
}
Element node = factory.createElement("foundJar");
node.setAttribute("name", keyStr.substring(0, keyStr.indexOf("-")));
node.setAttribute("desc", keyStr.substring(keyStr.indexOf("-") + 1));
node.appendChild(factory.createTextNode((String)subhash.get(keyStr)));
container.appendChild(node);
}
catch (Exception e)
{
errors = true;
Element node = factory.createElement("foundJar");
node.appendChild(factory.createTextNode(ERROR + " Reading " + key + " threw: " + e.toString()));
container.appendChild(node);
}
}
}
return errors;
}
/**
* Fillin hash with info about SystemProperties.
*
* Logs java.class.path and other likely paths; then attempts
* to search those paths for .jar files with Xalan-related classes.
*
* //@todo NOTE: We don't actually search java.ext.dirs for
* // *.jar files therein! This should be updated
*
* @param h Hashtable to put information in
* @see #jarNames
* @see #checkPathForJars(String, String[])
*/
protected void checkSystemProperties(Hashtable h)
{
if (null == h)
h = new Hashtable();
// Grab java version for later use
try
{
String javaVersion = SecuritySupport.getSystemProperty("java.version");
h.put("java.version", javaVersion);
}
catch (SecurityException se)
{
// For applet context, etc.
h.put(
"java.version",
"WARNING: SecurityException thrown accessing system version properties");
}
// Printout jar files on classpath(s) that may affect operation
// Do this in order
try
{
// This is present in all JVM's
String cp = SecuritySupport.getSystemProperty("java.class.path");
h.put("java.class.path", cp);
Vector classpathJars = checkPathForJars(cp, jarNames);
if (null != classpathJars)
h.put(FOUNDCLASSES + "java.class.path", classpathJars);
// Also check for JDK 1.2+ type classpaths
String othercp = SecuritySupport.getSystemProperty("sun.boot.class.path");
if (null != othercp)
{
h.put("sun.boot.class.path", othercp);
classpathJars = checkPathForJars(othercp, jarNames);
if (null != classpathJars)
h.put(FOUNDCLASSES + "sun.boot.class.path", classpathJars);
}
//@todo NOTE: We don't actually search java.ext.dirs for
// *.jar files therein! This should be updated
othercp = SecuritySupport.getSystemProperty("java.ext.dirs");
if (null != othercp)
{
h.put("java.ext.dirs", othercp);
classpathJars = checkPathForJars(othercp, jarNames);
if (null != classpathJars)
h.put(FOUNDCLASSES + "java.ext.dirs", classpathJars);
}
//@todo also check other System properties' paths?
// v2 = checkPathForJars(System.getProperty("sun.boot.library.path"), jarNames); // ?? may not be needed
// v3 = checkPathForJars(System.getProperty("java.library.path"), jarNames); // ?? may not be needed
}
catch (SecurityException se2)
{
// For applet context, etc.
h.put(
"java.class.path",
"WARNING: SecurityException thrown accessing system classpath properties");
}
}
/**
* Cheap-o listing of specified .jars found in the classpath.
*
* cp should be separated by the usual File.pathSeparator. We
* then do a simplistic search of the path for any requested
* .jar filenames, and return a listing of their names and
* where (apparently) they came from.
*
* @param cp classpath to search
* @param jars array of .jar base filenames to look for
*
* @return Vector of Hashtables filled with info about found .jars
* @see #jarNames
* @see #logFoundJars(Vector, String)
* @see #appendFoundJars(Node, Document, Vector, String )
* @see #getApparentVersion(String, long)
*/
protected Vector checkPathForJars(String cp, String[] jars)
{
if ((null == cp) || (null == jars) || (0 == cp.length())
|| (0 == jars.length))
return null;
Vector v = new Vector();
StringTokenizer st = new StringTokenizer(cp, File.pathSeparator);
while (st.hasMoreTokens())
{
// Look at each classpath entry for each of our requested jarNames
String filename = st.nextToken();
for (int i = 0; i < jars.length; i++)
{
if (filename.indexOf(jars[i]) > -1)
{
File f = new File(filename);
if (f.exists())
{
// If any requested jarName exists, report on
// the details of that .jar file
try
{
Hashtable h = new Hashtable(2);
// Note "-" char is looked for in appendFoundJars
h.put(jars[i] + "-path", f.getAbsolutePath());
// We won't bother reporting on the xalan.jar apparent version
// since this requires knowing the jar size of the xalan.jar
// before we build it.
// For other jars, eg. xml-apis.jar and xercesImpl.jar, we
// report the apparent version of the file we've found
if (!("xalan.jar".equalsIgnoreCase(jars[i]))) {
h.put(jars[i] + "-apparent.version",
getApparentVersion(jars[i], f.length()));
}
v.addElement(h);
}
catch (Exception e)
{
/* no-op, don't add it */
}
}
else
{
Hashtable h = new Hashtable(2);
// Note "-" char is looked for in appendFoundJars
h.put(jars[i] + "-path", WARNING + " Classpath entry: "
+ filename + " does not exist");
h.put(jars[i] + "-apparent.version", CLASS_NOTPRESENT);
v.addElement(h);
}
}
}
}
return v;
}
/**
* Cheap-o method to determine the product version of a .jar.
*
* Currently does a lookup into a local table of some recent
* shipped Xalan builds to determine where the .jar probably
* came from. Note that if you recompile Xalan or Xerces
* yourself this will likely report a potential error, since
* we can't certify builds other than the ones we ship.
* Only reports against selected posted Xalan-J builds.
*
* //@todo actually look up version info in manifests
*
* @param jarName base filename of the .jarfile
* @param jarSize size of the .jarfile
*
* @return String describing where the .jar file probably
* came from
*/
protected String getApparentVersion(String jarName, long jarSize)
{
// If we found a matching size and it's for our
// jar, then return it's description
// Lookup in static jarVersions Hashtable
String foundSize = (String) jarVersions.get(new Long(jarSize));
if ((null != foundSize) && (foundSize.startsWith(jarName)))
{
return foundSize;
}
else
{
if ("xerces.jar".equalsIgnoreCase(jarName)
|| "xercesImpl.jar".equalsIgnoreCase(jarName))
// || "xalan.jar".equalsIgnoreCase(jarName))
{
// For xalan.jar and xerces.jar/xercesImpl.jar, which we ship together:
// The jar is not from a shipped copy of xalan-j, so
// it's up to the user to ensure that it's compatible
return jarName + " " + WARNING + CLASS_PRESENT;
}
else
{
// Otherwise, it's just a jar we don't have the version info calculated for
return jarName + " " + CLASS_PRESENT;
}
}
}
/**
* Report version information about JAXP interfaces.
*
* Currently distinguishes between JAXP 1.0.1 and JAXP 1.1,
* and not found; only tests the interfaces, and does not
* check for reference implementation versions.
*
* @param h Hashtable to put information in
*/
protected void checkJAXPVersion(Hashtable h)
{
if (null == h)
h = new Hashtable();
Class clazz = null;
try
{
final String JAXP1_CLASS = "javax.xml.stream.XMLStreamConstants";
clazz = ObjectFactory.findProviderClass(JAXP1_CLASS, true);
// If we succeeded, we have JAXP 1.4 available
h.put(VERSION + "JAXP", "1.4");
}
catch (Exception e)
{
h.put(ERROR + VERSION + "JAXP", "1.3");
h.put(ERROR, ERROR_FOUND);
}
}
/**
* Report product version information from Xalan-J.
*
* Looks for version info in xalan.jar from Xalan-J products.
*
* @param h Hashtable to put information in
*/
protected void checkProcessorVersion(Hashtable h)
{
if (null == h)
h = new Hashtable();
try
{
final String XALAN1_VERSION_CLASS =
"com.sun.org.apache.xalan.internal.xslt.XSLProcessorVersion";
Class clazz = ObjectFactory.findProviderClass(XALAN1_VERSION_CLASS, true);
// Found Xalan-J 1.x, grab it's version fields
StringBuffer buf = new StringBuffer();
Field f = clazz.getField("PRODUCT");
buf.append(f.get(null));
buf.append(';');
f = clazz.getField("LANGUAGE");
buf.append(f.get(null));
buf.append(';');
f = clazz.getField("S_VERSION");
buf.append(f.get(null));
buf.append(';');
h.put(VERSION + "xalan1", buf.toString());
}
catch (Exception e1)
{
h.put(VERSION + "xalan1", CLASS_NOTPRESENT);
}
try
{
// NOTE: This is the old Xalan 2.0, 2.1, 2.2 version class,
// is being replaced by class below
final String XALAN2_VERSION_CLASS =
"com.sun.org.apache.xalan.internal.processor.XSLProcessorVersion";
Class clazz = ObjectFactory.findProviderClass(XALAN2_VERSION_CLASS, true);
// Found Xalan-J 2.x, grab it's version fields
StringBuffer buf = new StringBuffer();
Field f = clazz.getField("S_VERSION");
buf.append(f.get(null));
h.put(VERSION + "xalan2x", buf.toString());
}
catch (Exception e2)
{
h.put(VERSION + "xalan2x", CLASS_NOTPRESENT);
}
try
{
// NOTE: This is the new Xalan 2.2+ version class
final String XALAN2_2_VERSION_CLASS =
"com.sun.org.apache.xalan.internal.Version";
final String XALAN2_2_VERSION_METHOD = "getVersion";
final Class noArgs[] = new Class[0];
Class clazz = ObjectFactory.findProviderClass(XALAN2_2_VERSION_CLASS, true);
Method method = clazz.getMethod(XALAN2_2_VERSION_METHOD, noArgs);
Object returnValue = method.invoke(null, new Object[0]);
h.put(VERSION + "xalan2_2", (String)returnValue);
}
catch (Exception e2)
{
h.put(VERSION + "xalan2_2", CLASS_NOTPRESENT);
}
}
/**
* Report product version information from common parsers.
*
* Looks for version info in xerces.jar/xercesImpl.jar/crimson.jar.
*
* //@todo actually look up version info in crimson manifest
*
* @param h Hashtable to put information in
*/
protected void checkParserVersion(Hashtable h)
{
if (null == h)
h = new Hashtable();
try
{
final String XERCES1_VERSION_CLASS = "com.sun.org.apache.xerces.internal.framework.Version";
Class clazz = ObjectFactory.findProviderClass(XERCES1_VERSION_CLASS, true);
// Found Xerces-J 1.x, grab it's version fields
Field f = clazz.getField("fVersion");
String parserVersion = (String) f.get(null);
h.put(VERSION + "xerces1", parserVersion);
}
catch (Exception e)
{
h.put(VERSION + "xerces1", CLASS_NOTPRESENT);
}
// Look for xerces1 and xerces2 parsers separately
try
{
final String XERCES2_VERSION_CLASS = "com.sun.org.apache.xerces.internal.impl.Version";
Class clazz = ObjectFactory.findProviderClass(XERCES2_VERSION_CLASS, true);
// Found Xerces-J 2.x, grab it's version fields
Field f = clazz.getField("fVersion");
String parserVersion = (String) f.get(null);
h.put(VERSION + "xerces2", parserVersion);
}
catch (Exception e)
{
h.put(VERSION + "xerces2", CLASS_NOTPRESENT);
}
try
{
final String CRIMSON_CLASS = "org.apache.crimson.parser.Parser2";
Class clazz = ObjectFactory.findProviderClass(CRIMSON_CLASS, true);
//@todo determine specific crimson version
h.put(VERSION + "crimson", CLASS_PRESENT);
}
catch (Exception e)
{
h.put(VERSION + "crimson", CLASS_NOTPRESENT);
}
}
/**
* Report product version information from Ant.
*
* @param h Hashtable to put information in
*/
protected void checkAntVersion(Hashtable h)
{
if (null == h)
h = new Hashtable();
try
{
final String ANT_VERSION_CLASS = "org.apache.tools.ant.Main";
final String ANT_VERSION_METHOD = "getAntVersion"; // noArgs
final Class noArgs[] = new Class[0];
Class clazz = ObjectFactory.findProviderClass(ANT_VERSION_CLASS, true);
Method method = clazz.getMethod(ANT_VERSION_METHOD, noArgs);
Object returnValue = method.invoke(null, new Object[0]);
h.put(VERSION + "ant", (String)returnValue);
}
catch (Exception e)
{
h.put(VERSION + "ant", CLASS_NOTPRESENT);
}
}
/**
* Report version info from DOM interfaces.
*
* @param h Hashtable to put information in
*/
protected boolean checkDOML3(Hashtable h)
{
if (null == h)
h = new Hashtable();
final String DOM_CLASS = "org.w3c.dom.Document";
final String DOM_LEVEL3_METHOD = "getDoctype"; // no parameter
try
{
Class clazz = ObjectFactory.findProviderClass(DOM_CLASS, true);
Method method = clazz.getMethod(DOM_LEVEL3_METHOD, (Class<?>[])null);
// If we succeeded, we have loaded interfaces from a
// level 3 DOM somewhere
h.put(VERSION + "DOM", "3.0");
return true;
}
catch (Exception e)
{
return false;
}
}
/**
* Report version info from DOM interfaces.
*
* Currently distinguishes between pre-DOM level 2, the DOM
* level 2 working draft, the DOM level 2 final draft,
* and not found.
*
* @param h Hashtable to put information in
*/
protected void checkDOMVersion(Hashtable h)
{
if (null == h)
h = new Hashtable();
final String DOM_LEVEL2_CLASS = "org.w3c.dom.Document";
final String DOM_LEVEL2_METHOD = "createElementNS"; // String, String
final String DOM_LEVEL3_METHOD = "getDoctype"; // no parameter
final String DOM_LEVEL2WD_CLASS = "org.w3c.dom.Node";
final String DOM_LEVEL2WD_METHOD = "supported"; // String, String
final String DOM_LEVEL2FD_CLASS = "org.w3c.dom.Node";
final String DOM_LEVEL2FD_METHOD = "isSupported"; // String, String
final Class twoStringArgs[] = { java.lang.String.class,
java.lang.String.class };
try
{
Class clazz = ObjectFactory.findProviderClass(DOM_LEVEL2_CLASS, true);
Method method = clazz.getMethod(DOM_LEVEL2_METHOD, twoStringArgs);
// If we succeeded, we have loaded interfaces from a
// level 2 DOM somewhere
h.put(VERSION + "DOM", "2.0");
try
{
// Check for the working draft version, which is
// commonly found, but won't work anymore
clazz = ObjectFactory.findProviderClass(DOM_LEVEL2WD_CLASS, true);
method = clazz.getMethod(DOM_LEVEL2WD_METHOD, twoStringArgs);
h.put(ERROR + VERSION + "DOM.draftlevel", "2.0wd");
h.put(ERROR, ERROR_FOUND);
}
catch (Exception e2)
{
try
{
// Check for the final draft version as well
clazz = ObjectFactory.findProviderClass(DOM_LEVEL2FD_CLASS, true);
method = clazz.getMethod(DOM_LEVEL2FD_METHOD, twoStringArgs);
h.put(VERSION + "DOM.draftlevel", "2.0fd");
}
catch (Exception e3)
{
h.put(ERROR + VERSION + "DOM.draftlevel", "2.0unknown");
h.put(ERROR, ERROR_FOUND);
}
}
}
catch (Exception e)
{
h.put(ERROR + VERSION + "DOM",
"ERROR attempting to load DOM level 2 class: " + e.toString());
h.put(ERROR, ERROR_FOUND);
}
//@todo load an actual DOM implmementation and query it as well
//@todo load an actual DOM implmementation and check if
// isNamespaceAware() == true, which is needed to parse
// xsl stylesheet files into a DOM
}
/**
* Report version info from SAX interfaces.
*
* Currently distinguishes between SAX 2, SAX 2.0beta2,
* SAX1, and not found.
*
* @param h Hashtable to put information in
*/
protected void checkSAXVersion(Hashtable h)
{
if (null == h)
h = new Hashtable();
final String SAX_VERSION1_CLASS = "org.xml.sax.Parser";
final String SAX_VERSION1_METHOD = "parse"; // String
final String SAX_VERSION2_CLASS = "org.xml.sax.XMLReader";
final String SAX_VERSION2_METHOD = "parse"; // String
final String SAX_VERSION2BETA_CLASSNF = "org.xml.sax.helpers.AttributesImpl";
final String SAX_VERSION2BETA_METHODNF = "setAttributes"; // Attributes
final Class oneStringArg[] = { java.lang.String.class };
// Note this introduces a minor compile dependency on SAX...
final Class attributesArg[] = { org.xml.sax.Attributes.class };
try
{
// This method was only added in the final SAX 2.0 release;
// see changes.html "Changes from SAX 2.0beta2 to SAX 2.0prerelease"
Class clazz = ObjectFactory.findProviderClass(SAX_VERSION2BETA_CLASSNF, true);
Method method = clazz.getMethod(SAX_VERSION2BETA_METHODNF, attributesArg);
// If we succeeded, we have loaded interfaces from a
// real, final SAX version 2.0 somewhere
h.put(VERSION + "SAX", "2.0");
}
catch (Exception e)
{
// If we didn't find the SAX 2.0 class, look for a 2.0beta2
h.put(ERROR + VERSION + "SAX",
"ERROR attempting to load SAX version 2 class: " + e.toString());
h.put(ERROR, ERROR_FOUND);
try
{
Class clazz = ObjectFactory.findProviderClass(SAX_VERSION2_CLASS, true);
Method method = clazz.getMethod(SAX_VERSION2_METHOD, oneStringArg);
// If we succeeded, we have loaded interfaces from a
// SAX version 2.0beta2 or earlier; these might work but
// you should really have the final SAX 2.0
h.put(VERSION + "SAX-backlevel", "2.0beta2-or-earlier");
}
catch (Exception e2)
{
// If we didn't find the SAX 2.0beta2 class, look for a 1.0 one
h.put(ERROR + VERSION + "SAX",
"ERROR attempting to load SAX version 2 class: " + e.toString());
h.put(ERROR, ERROR_FOUND);
try
{
Class clazz = ObjectFactory.findProviderClass(SAX_VERSION1_CLASS, true);
Method method = clazz.getMethod(SAX_VERSION1_METHOD, oneStringArg);
// If we succeeded, we have loaded interfaces from a
// SAX version 1.0 somewhere; which won't work very
// well for JAXP 1.1 or beyond!
h.put(VERSION + "SAX-backlevel", "1.0");
}
catch (Exception e3)
{
// If we didn't find the SAX 2.0 class, look for a 1.0 one
// Note that either 1.0 or no SAX are both errors
h.put(ERROR + VERSION + "SAX-backlevel",
"ERROR attempting to load SAX version 1 class: " + e3.toString());
}
}
}
}
/**
* Manual table of known .jar sizes.
* Only includes shipped versions of certain projects.
* key=jarsize, value=jarname ' from ' distro name
* Note assumption: two jars cannot have the same size!
*
* @see #getApparentVersion(String, long)
*/
private static Hashtable jarVersions = new Hashtable();
/**
* Static initializer for jarVersions table.
* Doing this just once saves time and space.
*
* @see #getApparentVersion(String, long)
*/
static
{
// Note: hackish Hashtable, this could use improvement
jarVersions.put(new Long(857192), "xalan.jar from xalan-j_1_1");
jarVersions.put(new Long(440237), "xalan.jar from xalan-j_1_2");
jarVersions.put(new Long(436094), "xalan.jar from xalan-j_1_2_1");
jarVersions.put(new Long(426249), "xalan.jar from xalan-j_1_2_2");
jarVersions.put(new Long(702536), "xalan.jar from xalan-j_2_0_0");
jarVersions.put(new Long(720930), "xalan.jar from xalan-j_2_0_1");
jarVersions.put(new Long(732330), "xalan.jar from xalan-j_2_1_0");
jarVersions.put(new Long(872241), "xalan.jar from xalan-j_2_2_D10");
jarVersions.put(new Long(882739), "xalan.jar from xalan-j_2_2_D11");
jarVersions.put(new Long(923866), "xalan.jar from xalan-j_2_2_0");
jarVersions.put(new Long(905872), "xalan.jar from xalan-j_2_3_D1");
jarVersions.put(new Long(906122), "xalan.jar from xalan-j_2_3_0");
jarVersions.put(new Long(906248), "xalan.jar from xalan-j_2_3_1");
jarVersions.put(new Long(983377), "xalan.jar from xalan-j_2_4_D1");
jarVersions.put(new Long(997276), "xalan.jar from xalan-j_2_4_0");
jarVersions.put(new Long(1031036), "xalan.jar from xalan-j_2_4_1");
// Stop recording xalan.jar sizes as of Xalan Java 2.5.0
jarVersions.put(new Long(596540), "xsltc.jar from xalan-j_2_2_0");
jarVersions.put(new Long(590247), "xsltc.jar from xalan-j_2_3_D1");
jarVersions.put(new Long(589914), "xsltc.jar from xalan-j_2_3_0");
jarVersions.put(new Long(589915), "xsltc.jar from xalan-j_2_3_1");
jarVersions.put(new Long(1306667), "xsltc.jar from xalan-j_2_4_D1");
jarVersions.put(new Long(1328227), "xsltc.jar from xalan-j_2_4_0");
jarVersions.put(new Long(1344009), "xsltc.jar from xalan-j_2_4_1");
jarVersions.put(new Long(1348361), "xsltc.jar from xalan-j_2_5_D1");
// Stop recording xsltc.jar sizes as of Xalan Java 2.5.0
jarVersions.put(new Long(1268634), "xsltc.jar-bundled from xalan-j_2_3_0");
jarVersions.put(new Long(100196), "xml-apis.jar from xalan-j_2_2_0 or xalan-j_2_3_D1");
jarVersions.put(new Long(108484), "xml-apis.jar from xalan-j_2_3_0, or xalan-j_2_3_1 from xml-commons-1.0.b2");
jarVersions.put(new Long(109049), "xml-apis.jar from xalan-j_2_4_0 from xml-commons RIVERCOURT1 branch");
jarVersions.put(new Long(113749), "xml-apis.jar from xalan-j_2_4_1 from factoryfinder-build of xml-commons RIVERCOURT1");
jarVersions.put(new Long(124704), "xml-apis.jar from tck-jaxp-1_2_0 branch of xml-commons");
jarVersions.put(new Long(124724), "xml-apis.jar from tck-jaxp-1_2_0 branch of xml-commons, tag: xml-commons-external_1_2_01");
jarVersions.put(new Long(194205), "xml-apis.jar from head branch of xml-commons, tag: xml-commons-external_1_3_02");
// If the below were more common I would update it to report
// errors better; but this is so old hardly anyone has it
jarVersions.put(new Long(424490), "xalan.jar from Xerces Tools releases - ERROR:DO NOT USE!");
jarVersions.put(new Long(1591855), "xerces.jar from xalan-j_1_1 from xerces-1...");
jarVersions.put(new Long(1498679), "xerces.jar from xalan-j_1_2 from xerces-1_2_0.bin");
jarVersions.put(new Long(1484896), "xerces.jar from xalan-j_1_2_1 from xerces-1_2_1.bin");
jarVersions.put(new Long(804460), "xerces.jar from xalan-j_1_2_2 from xerces-1_2_2.bin");
jarVersions.put(new Long(1499244), "xerces.jar from xalan-j_2_0_0 from xerces-1_2_3.bin");
jarVersions.put(new Long(1605266), "xerces.jar from xalan-j_2_0_1 from xerces-1_3_0.bin");
jarVersions.put(new Long(904030), "xerces.jar from xalan-j_2_1_0 from xerces-1_4.bin");
jarVersions.put(new Long(904030), "xerces.jar from xerces-1_4_0.bin");
jarVersions.put(new Long(1802885), "xerces.jar from xerces-1_4_2.bin");
jarVersions.put(new Long(1734594), "xerces.jar from Xerces-J-bin.2.0.0.beta3");
jarVersions.put(new Long(1808883), "xerces.jar from xalan-j_2_2_D10,D11,D12 or xerces-1_4_3.bin");
jarVersions.put(new Long(1812019), "xerces.jar from xalan-j_2_2_0");
jarVersions.put(new Long(1720292), "xercesImpl.jar from xalan-j_2_3_D1");
jarVersions.put(new Long(1730053), "xercesImpl.jar from xalan-j_2_3_0 or xalan-j_2_3_1 from xerces-2_0_0");
jarVersions.put(new Long(1728861), "xercesImpl.jar from xalan-j_2_4_D1 from xerces-2_0_1");
jarVersions.put(new Long(972027), "xercesImpl.jar from xalan-j_2_4_0 from xerces-2_1");
jarVersions.put(new Long(831587), "xercesImpl.jar from xalan-j_2_4_1 from xerces-2_2");
jarVersions.put(new Long(891817), "xercesImpl.jar from xalan-j_2_5_D1 from xerces-2_3");
jarVersions.put(new Long(895924), "xercesImpl.jar from xerces-2_4");
jarVersions.put(new Long(1010806), "xercesImpl.jar from Xerces-J-bin.2.6.2");
jarVersions.put(new Long(1203860), "xercesImpl.jar from Xerces-J-bin.2.7.1");
jarVersions.put(new Long(37485), "xalanj1compat.jar from xalan-j_2_0_0");
jarVersions.put(new Long(38100), "xalanj1compat.jar from xalan-j_2_0_1");
jarVersions.put(new Long(18779), "xalanservlet.jar from xalan-j_2_0_0");
jarVersions.put(new Long(21453), "xalanservlet.jar from xalan-j_2_0_1");
jarVersions.put(new Long(24826), "xalanservlet.jar from xalan-j_2_3_1 or xalan-j_2_4_1");
jarVersions.put(new Long(24831), "xalanservlet.jar from xalan-j_2_4_1");
// Stop recording xalanservlet.jar sizes as of Xalan Java 2.5.0; now a .war file
// For those who've downloaded JAXP from sun
jarVersions.put(new Long(5618), "jaxp.jar from jaxp1.0.1");
jarVersions.put(new Long(136133), "parser.jar from jaxp1.0.1");
jarVersions.put(new Long(28404), "jaxp.jar from jaxp-1.1");
jarVersions.put(new Long(187162), "crimson.jar from jaxp-1.1");
jarVersions.put(new Long(801714), "xalan.jar from jaxp-1.1");
jarVersions.put(new Long(196399), "crimson.jar from crimson-1.1.1");
jarVersions.put(new Long(33323), "jaxp.jar from crimson-1.1.1 or jakarta-ant-1.4.1b1");
jarVersions.put(new Long(152717), "crimson.jar from crimson-1.1.2beta2");
jarVersions.put(new Long(88143), "xml-apis.jar from crimson-1.1.2beta2");
jarVersions.put(new Long(206384), "crimson.jar from crimson-1.1.3 or jakarta-ant-1.4.1b1");
// jakarta-ant: since many people use ant these days
jarVersions.put(new Long(136198), "parser.jar from jakarta-ant-1.3 or 1.2");
jarVersions.put(new Long(5537), "jaxp.jar from jakarta-ant-1.3 or 1.2");
}
/** Simple PrintWriter we send output to; defaults to System.out. */
protected PrintWriter outWriter = new PrintWriter(System.out, true);
/**
* Bottleneck output: calls outWriter.println(s).
* @param s String to print
*/
protected void logMsg(String s)
{
outWriter.println(s);
}
}
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