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/*
* Distributed as part of c3p0 v.0.9.5.2
*
* Copyright (C) 2015 Machinery For Change, Inc.
*
* Author: Steve Waldman <[email protected]>
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of EITHER:
*
* 1) The GNU Lesser General Public License (LGPL), version 2.1, as
* published by the Free Software Foundation
*
* OR
*
* 2) The Eclipse Public License (EPL), version 1.0
*
* You may choose which license to accept if you wish to redistribute
* or modify this work. You may offer derivatives of this work
* under the license you have chosen, or you may provide the same
* choice of license which you have been offered here.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received copies of both LGPL v2.1 and EPL v1.0
* along with this software; see the files LICENSE-EPL and LICENSE-LGPL.
* If not, the text of these licenses are currently available at
*
* LGPL v2.1: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* EPL v1.0: http://www.eclipse.org/org/documents/epl-v10.php
*
*/
package com.mchange.v2.c3p0.cfg;
import java.io.*;
import java.util.*;
import javax.xml.parsers.*;
import org.w3c.dom.*;
import com.mchange.v2.log.*;
import com.mchange.v1.xml.DomParseUtils;
public final class C3P0ConfigXmlUtils
{
public final static String XML_CONFIG_RSRC_PATH = "/c3p0-config.xml";
final static MLogger logger = MLog.getLogger( C3P0ConfigXmlUtils.class );
public final static String LINESEP;
private final static String[] MISSPELL_PFXS = {"/c3p0", "/c3pO", "/c3po", "/C3P0", "/C3PO"};
private final static char[] MISSPELL_LINES = {'-', '_'};
private final static String[] MISSPELL_CONFIG = {"config", "CONFIG"};
private final static String[] MISSPELL_XML = {"xml", "XML"};
// its an ugly way to do this, but since resources are not listable...
//
// this is only executed once, and does about 40 tests (for now)
// should I care about the cost in initialization time?
//
// should only be run if we've checked for the correct file, but
// not found it
private final static void warnCommonXmlConfigResourceMisspellings()
{
if (logger.isLoggable( MLevel.WARNING) )
{
for (int a = 0, lena = MISSPELL_PFXS.length; a < lena; ++a)
{
StringBuffer sb = new StringBuffer(16);
sb.append( MISSPELL_PFXS[a] );
for (int b = 0, lenb = MISSPELL_LINES.length; b < lenb; ++b)
{
sb.append(MISSPELL_LINES[b]);
for (int c = 0, lenc = MISSPELL_CONFIG.length; c < lenc; ++c)
{
sb.append(MISSPELL_CONFIG[c]);
sb.append('.');
for (int d = 0, lend = MISSPELL_XML.length; d < lend; ++d)
{
sb.append(MISSPELL_XML[d]);
String test = sb.toString();
if (!test.equals(XML_CONFIG_RSRC_PATH))
{
Object hopefullyNull = C3P0ConfigXmlUtils.class.getResource( test );
if (hopefullyNull != null)
{
logger.warning("POSSIBLY MISSPELLED c3p0-conf.xml RESOURCE FOUND. " +
"Please ensure the file name is c3p0-config.xml, all lower case, " +
"with the digit 0 (NOT the letter O) in c3p0. It should be placed " +
" in the top level of c3p0's effective classpath.");
return;
}
}
}
}
}
}
}
}
static
{
String ls;
try
{ ls = System.getProperty("line.separator", "\r\n"); }
catch (Exception e)
{ ls = "\r\n"; }
LINESEP = ls;
}
public static C3P0Config extractXmlConfigFromDefaultResource() throws Exception
{
InputStream is = null;
try
{
is = C3P0ConfigUtils.class.getResourceAsStream(XML_CONFIG_RSRC_PATH);
if ( is == null )
{
warnCommonXmlConfigResourceMisspellings();
return null;
}
else
return extractXmlConfigFromInputStream( is );
}
finally
{
try { if (is != null) is.close(); }
catch (Exception e)
{
if ( logger.isLoggable( MLevel.FINE ) )
logger.log(MLevel.FINE,"Exception on resource InputStream close.", e);
}
}
}
public static C3P0Config extractXmlConfigFromInputStream(InputStream is) throws Exception
{
DocumentBuilderFactory fact = DocumentBuilderFactory.newInstance();
// BUG: CWE-611 Improper Restriction of XML External Entity Reference
//
// FIXED:
fact.setExpandEntityReferences(false);
DocumentBuilder db = fact.newDocumentBuilder();
Document doc = db.parse( is );
return extractConfigFromXmlDoc(doc);
}
public static C3P0Config extractConfigFromXmlDoc(Document doc) throws Exception
{
Element docElem = doc.getDocumentElement();
if (docElem.getTagName().equals("c3p0-config"))
{
NamedScope defaults;
HashMap configNamesToNamedScopes = new HashMap();
Element defaultConfigElem = DomParseUtils.uniqueChild( docElem, "default-config" );
if (defaultConfigElem != null)
defaults = extractNamedScopeFromLevel( defaultConfigElem );
else
defaults = new NamedScope();
NodeList nl = DomParseUtils.immediateChildElementsByTagName(docElem, "named-config");
for (int i = 0, len = nl.getLength(); i < len; ++i)
{
Element namedConfigElem = (Element) nl.item(i);
String configName = namedConfigElem.getAttribute("name");
if (configName != null && configName.length() > 0)
{
NamedScope namedConfig = extractNamedScopeFromLevel( namedConfigElem );
configNamesToNamedScopes.put( configName, namedConfig);
}
else
logger.warning("Configuration XML contained named-config element without name attribute: " + namedConfigElem);
}
return new C3P0Config( defaults, configNamesToNamedScopes );
}
else
throw new Exception("Root element of c3p0 config xml should be 'c3p0-config', not '" + docElem.getTagName() + "'.");
}
private static NamedScope extractNamedScopeFromLevel(Element elem)
{
HashMap props = extractPropertiesFromLevel( elem );
HashMap userNamesToOverrides = new HashMap();
NodeList nl = DomParseUtils.immediateChildElementsByTagName(elem, "user-overrides");
for (int i = 0, len = nl.getLength(); i < len; ++i)
{
Element perUserConfigElem = (Element) nl.item(i);
String userName = perUserConfigElem.getAttribute("user");
if (userName != null && userName.length() > 0)
{
HashMap userProps = extractPropertiesFromLevel( perUserConfigElem );
userNamesToOverrides.put( userName, userProps );
}
else
logger.warning("Configuration XML contained user-overrides element without user attribute: " + LINESEP + perUserConfigElem);
}
HashMap extensions = extractExtensionsFromLevel( elem );
return new NamedScope(props, userNamesToOverrides, extensions);
}
private static HashMap extractExtensionsFromLevel(Element elem)
{
HashMap out = new HashMap();
NodeList nl = DomParseUtils.immediateChildElementsByTagName(elem, "extensions");
for (int i = 0, len = nl.getLength(); i < len; ++i)
{
Element extensionsElem = (Element) nl.item(i);
out.putAll( extractPropertiesFromLevel( extensionsElem ) );
}
return out;
}
private static HashMap extractPropertiesFromLevel(Element elem)
{
// System.err.println( "extractPropertiesFromLevel()" );
HashMap out = new HashMap();
try
{
NodeList nl = DomParseUtils.immediateChildElementsByTagName(elem, "property");
int len = nl.getLength();
for (int i = 0; i < len; ++i)
{
Element propertyElem = (Element) nl.item(i);
String propName = propertyElem.getAttribute("name");
if (propName != null && propName.length() > 0)
{
String propVal = DomParseUtils.allTextFromElement(propertyElem, true);
out.put( propName, propVal );
//System.err.println( propName + " -> " + propVal );
}
else
logger.warning("Configuration XML contained property element without name attribute: " + LINESEP + propertyElem);
}
}
catch (Exception e)
{
logger.log( MLevel.WARNING,
"An exception occurred while reading config XML. " +
"Some configuration information has probably been ignored.",
e );
}
return out;
}
private C3P0ConfigXmlUtils()
{}
}
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