/*******************************************************************************
* Copyright (c) 1998, 2009 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.internal.sessions.factories;
import java.io.InputStream;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.util.Hashtable;
import java.util.Enumeration;
import org.eclipse.persistence.internal.security.PrivilegedAccessHelper;
import org.eclipse.persistence.internal.security.PrivilegedGetClassLoaderForClass;
import org.xml.sax.InputSource;
import org.xml.sax.EntityResolver;
/**
* INTERNAL:
* <p><b>Purpose</b>: Provide a mechanism for retrieving the DTD file
* from the classpath
*
* @see org.xml.sax.EntityResolver
* @since TopLink 10.1.3
* @author Gordon Yorke, Guy Pelletier
*/
public class PersistenceEntityResolver implements EntityResolver {
protected Hashtable m_localResources;
protected static final String dtdFileName40 = "sessions_4_0.dtd";
protected static final String doctTypeId40 = "-//Oracle Corp.//DTD TopLink for JAVA 4.0//EN";
protected static final String dtdFileName45 = "sessions_4_5.dtd";
protected static final String doctTypeId45 = "-//Oracle Corp.//DTD TopLink for JAVA 4.5//EN";
protected static final String dtdFileName904 = "sessions_9_0_4.dtd";
protected static final String doctTypeId904 = "-//Oracle Corp.//DTD TopLink Sessions 9.0.4//EN";
/**
* INTERNAL:
*/
public PersistenceEntityResolver() {
m_localResources = new Hashtable();
populateLocalResources();
}
/**
* INTERNAL:
*/
protected void populateLocalResources() {
m_localResources.put(doctTypeId40, dtdFileName40);
m_localResources.put(doctTypeId45, dtdFileName45);
m_localResources.put(doctTypeId904, dtdFileName904);
}
/**
* INTERNAL:
*/
protected String getDtdFileName(String docTypeId) {
return (String)getLocalResources().get(docTypeId);
}
/**
* INTERNAL:
*/
public Hashtable getLocalResources() {
return m_localResources;
}
/**
* INTERNAL:
*/
public void setLocalResources(Hashtable ht) {
m_localResources = ht;
}
/**
* INTERNAL:
*/
public void addLocalResource(String publicId, String localFileName) {
m_localResources.put(publicId, localFileName);
}
/**
* INTERNAL:
*/
public InputSource resolveEntity(String publicId, String systemId) {
for (Enumeration docTypeIds = m_localResources.keys(); docTypeIds.hasMoreElements();) {
String docTypeId = (String)docTypeIds.nextElement();
if ((publicId != null) && publicId.equals(docTypeId)) {
InputStream localDtdStream = null;
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()){
try{
localDtdStream = ((ClassLoader)AccessController.doPrivileged(new PrivilegedGetClassLoaderForClass(getClass()))).getResourceAsStream(getDtdFileName(docTypeId));
}catch (PrivilegedActionException ex){
throw (RuntimeException) ex.getCause();
}
}else{
localDtdStream = PrivilegedAccessHelper.getClassLoaderForClass(getClass()).getResourceAsStream(getDtdFileName(docTypeId));
}
if (localDtdStream != null) {
return new InputSource(localDtdStream);
}
}
}
return null;
}
}