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/**
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* '$RCSfile$'
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* Copyright: 2000 Regents of the University of California and the
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* National Center for Ecological Analysis and Synthesis
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* Authors: Jivka Bojilova
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* Release: @release@
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*
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* '$Author: tao $'
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* '$Date: 2002-11-01 18:11:49 -0800 (Fri, 01 Nov 2002) $'
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* '$Revision: 1323 $'
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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package edu.ucsb.nceas.metacat;
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import java.io.*;
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import java.sql.*;
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import java.util.Stack;
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import java.util.Vector;
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import java.util.Hashtable;
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import java.net.URL;
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import java.net.MalformedURLException;
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import org.xml.sax.Attributes;
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import org.xml.sax.InputSource;
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import org.xml.sax.ContentHandler;
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import org.xml.sax.EntityResolver;
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import org.xml.sax.ErrorHandler;
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import org.xml.sax.SAXException;
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import org.xml.sax.SAXParseException;
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import org.xml.sax.XMLReader;
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import org.xml.sax.helpers.XMLReaderFactory;
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import org.xml.sax.helpers.DefaultHandler;
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/**
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* A Class that read an eml-access.xml file containing ACL for a metadata
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* document and parse it into access rules
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*/
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public class AccessRulesFromDocument extends DefaultHandler {
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private static final int CHMOD = 1;
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private static final int WRITE = 2;
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private static final int READ = 4;
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private static final int ALL = 7;
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private static final String ALLOWFIRST="allowFirst";
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private static final String DENYFIRST="denyFirst";
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private static final String ALLOW="allow";
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private static final String DENY="deny";
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private static final String PUBLIC="public";
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private static String sysdate = MetaCatUtil.dbAdapter.getDateTimeFunction();
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private static String isnull = MetaCatUtil.dbAdapter.getIsNULLFunction();
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private String parserName;
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private Stack elementStack;
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private String server;
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private String sep;
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private boolean processingDTD;
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private String aclid;
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private int rev;
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private String docname;
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private String doctype;
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private String systemid;
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private String docurl;
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private Vector resourceURL;
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private Vector resourceID;
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private Vector principal;
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private int permission;
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private String permType;
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private String permOrder;
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// private String publicAcc;
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private String beginTime;
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private String endTime;
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private int ticketCount;
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private int serverCode = 1;
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private Vector aclObjects = new Vector();
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private boolean instarttag = true;
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private String tagName = "";
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private Vector accessRuleVector = new Vector();
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/**
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* Construct an instance of the AccessControlList class.
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* It parse acl file and loads acl data into db connection.
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*
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* @param aclid the Accession# of the document with the acl data
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* @param serverCode the serverid from xml_replication on which this document
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* resides.
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*/
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public AccessRulesFromDocument(String aclid)
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throws SAXException, IOException, McdbException, SQLException
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{
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String parserName = MetaCatUtil.getOption("saxparser");
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this.server = MetaCatUtil.getOption("server");
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this.sep = MetaCatUtil.getOption("accNumSeparator");
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this.parserName = parserName;
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this.processingDTD = false;
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this.elementStack = new Stack();
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this.aclid = aclid;
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this.resourceURL = new Vector();
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this.resourceID = new Vector();
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this.principal = new Vector();
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this.permission = 0;
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this.ticketCount = 0;
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// read the access file from db connection
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DocumentImpl acldoc = new DocumentImpl(aclid);
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String acl = acldoc.toString();
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this.rev = acldoc.getRev();
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// Initialize the parse
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XMLReader parser = initializeParser();
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// parse the access file and write the info to xml_access
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parser.parse(new InputSource(new StringReader(acl)));
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}
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/* Set up the SAX parser for reading the XML serialized ACL */
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private XMLReader initializeParser() throws SAXException, SQLException
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{
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XMLReader parser = null;
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// Get an instance of the parser
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parser = XMLReaderFactory.createXMLReader(parserName);
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// Turn off validation
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parser.setFeature("http://xml.org/sax/features/validation", true);
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// Set Handlers in the parser
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// Set the ContentHandler to this instance
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parser.setContentHandler((ContentHandler)this);
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// make a DBEntityResolver instance
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// Set the EntityReslover to DBEntityResolver instance
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DBConnection conn = null;
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int serialNumber = -1;
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try
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{
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//get connection from DBConnectionPool
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conn=DBConnectionPool.getDBConnection("AccessControlList.getACLObject");
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serialNumber=conn.getCheckOutSerialNumber();
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EntityResolver eresolver = new DBEntityResolver(conn, this, null);
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parser.setEntityResolver((EntityResolver)eresolver);
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}
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finally
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{
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//retrun DBConnection
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DBConnectionPool.returnDBConnection(conn,serialNumber);
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}
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// Set the ErrorHandler to this instance
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parser.setErrorHandler((ErrorHandler)this);
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return parser;
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}
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/**
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* Callback method used by the SAX Parser when beginning of the document
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*/
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public void startDocument() throws SAXException
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{
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//delete all previously submitted permissions @ relations
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//this happens only on UPDATE of the access file
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try {
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this.aclObjects = createACLObjects(aclid);
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//delete all permissions for resources related to @aclid if any
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/*if ( aclid != null ) {
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deletePermissionsForRelatedResources(aclid);
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}*/
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} catch (SQLException sqle) {
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throw new SAXException(sqle);
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}
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}
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/**
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* Callback method used by the SAX Parser when the start tag of an
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* element is detected. Used in this context to parse and store
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* the acl information in class variables.
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*/
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public void startElement (String uri, String localName,
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String qName, Attributes atts)
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throws SAXException
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{
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instarttag = true;
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if(localName.equals("allow"))
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{
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tagName = "allow";
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}
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else if(localName.equals("deny"))
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{
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tagName = "deny";
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}
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BasicNode currentNode = new BasicNode(localName);
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if (atts != null) {
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int len = atts.getLength();
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for (int i = 0; i < len; i++) {
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currentNode.setAttribute(atts.getLocalName(i), atts.getValue(i));
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}
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}
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if ( currentNode.getTagName().equals("acl") ) {
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permOrder = currentNode.getAttribute("order");
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}
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elementStack.push(currentNode);
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}
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/**
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* Callback method used by the SAX Parser when the text sequences of an
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* xml stream are detected. Used in this context to parse and store
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* the acl information in class variables.
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*/
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public void characters(char ch[], int start, int length)
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throws SAXException
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{
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if(!instarttag)
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{
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return;
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}
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String inputString = new String(ch, start, length);
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inputString = inputString.trim();
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//System.out.println("==============inputString: " + inputString);
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BasicNode currentNode = (BasicNode)elementStack.peek();
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String currentTag = currentNode.getTagName();
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if (currentTag.equals("principal")) {
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principal.addElement(inputString);
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} else if (currentTag.equals("permission")) {
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if ( inputString.trim().toUpperCase().equals("READ") ) {
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permission = permission | READ;
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} else if ( inputString.trim().toUpperCase().equals("WRITE") ) {
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permission = permission | WRITE;
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} else if ( inputString.trim().toUpperCase().equals("CHANGEPERMISSION"))
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{
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permission = permission | CHMOD;
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} else if ( inputString.trim().toUpperCase().equals("ALL") ) {
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permission = permission | ALL;
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}/*else{
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throw new SAXException("Unknown permission type: " + inputString);
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}*/
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} else if ( currentTag.equals("startDate") && beginTime == null ) {
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beginTime = inputString.trim();
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} else if ( currentTag.equals("stopDate") && endTime == null) {
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endTime = inputString.trim();
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} else if (currentTag.equals("ticketCount") && ticketCount == 0 ) {
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try {
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ticketCount = (new Integer(inputString.trim())).intValue();
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} catch (NumberFormatException nfe) {
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throw new SAXException("Wrong integer format for:" + inputString);
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}
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}
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}
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/**
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* Callback method used by the SAX Parser when the end tag of an
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* element is detected. Used in this context to parse and store
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* the acl information in class variables.
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*/
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public void endElement (String uri, String localName, String qName)
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throws SAXException
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{
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String oneAccessRule = null;
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instarttag = false;
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BasicNode leaving = (BasicNode)elementStack.pop();
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String leavingTagName = leaving.getTagName();
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if ( leavingTagName.equals("allow") ||
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leavingTagName.equals("deny") ) {
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if ( permission > 0 ) {
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// create a rule string an put it into rule vector.
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try
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{
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if (permOrder != null)
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{
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permOrder = permOrder.trim();
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}
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for (int j = 0; j < principal.size(); j++ )
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{
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String onePrincipal = (String)principal.elementAt(j);
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if (onePrincipal != null)
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{
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onePrincipal= onePrincipal.trim();
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}
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oneAccessRule = onePrincipal + CleanupAccessTable.DELIMITER;
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oneAccessRule = oneAccessRule + leavingTagName + CleanupAccessTable.DELIMITER;
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oneAccessRule = oneAccessRule + permission + CleanupAccessTable.DELIMITER;
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oneAccessRule = oneAccessRule + permOrder;
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// inserinto accessRuleVector
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accessRuleVector.addElement(oneAccessRule);
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}
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}
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catch (Exception e)
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{
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throw new SAXException(e);
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}
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}
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// reset the allow/deny permission
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principal = new Vector();
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permission = 0;
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beginTime = null;
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endTime = null;
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ticketCount = 0;
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}
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}
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/**
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* SAX Handler that receives notification of DOCTYPE. Sets the DTD.
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* @param name name of the DTD
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* @param publicId Public Identifier of the DTD
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* @param systemId System Identifier of the DTD
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*/
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public void startDTD(String name, String publicId, String systemId)
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throws SAXException {
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docname = name;
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doctype = publicId;
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systemid = systemId;
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}
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/**
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* SAX Handler that receives notification of the start of entities.
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* @param name name of the entity
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*/
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public void startEntity(String name) throws SAXException {
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if (name.equals("[dtd]")) {
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processingDTD = true;
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}
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}
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/**
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* SAX Handler that receives notification of the end of entities.
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* @param name name of the entity
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*/
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public void endEntity(String name) throws SAXException {
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if (name.equals("[dtd]")) {
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processingDTD = false;
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}
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}
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/**
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* Get the document name.
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*/
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public String getDocname() {
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return docname;
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}
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377
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/**
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* Get the document processing state.
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*/
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public boolean processingDTD() {
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return processingDTD;
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}
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384
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/**
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* Method to get accessRuleVector
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*/
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387
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public Vector getAccessRuleVector()
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{
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return accessRuleVector;
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}
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391
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|
392
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/**
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393
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* Method to get ACLObjects
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394
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*/
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public Vector getACLObjects()
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{
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return aclObjects;
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}
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399
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/* Get all objects associated with @aclid from db.*/
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private Vector createACLObjects(String aclid)
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throws SQLException
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{
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Vector aclObjects = new Vector();
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DBConnection conn = null;
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int serialNumber = -1;
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PreparedStatement pstmt = null;
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try
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{
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//get connection from DBConnectionPool
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conn=DBConnectionPool.getDBConnection("AccessControlList.getACLObject");
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serialNumber=conn.getCheckOutSerialNumber();
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// delete all acl records for resources related to @aclid if any
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pstmt = conn.prepareStatement(
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"SELECT object FROM xml_relation " +
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"WHERE subject = ? ");
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pstmt.setString(1,aclid);
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pstmt.execute();
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ResultSet rs = pstmt.getResultSet();
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boolean hasRows = rs.next();
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while (hasRows) {
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aclObjects.addElement(rs.getString(1));
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hasRows = rs.next();
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}//while
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// Add access file itself
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//aclObjects.addElement(aclid);
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}
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catch (SQLException e)
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{
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throw e;
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432
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}
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finally
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434
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{
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435
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try
|
436
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{
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pstmt.close();
|
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}
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finally
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{
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//retrun DBConnection
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DBConnectionPool.returnDBConnection(conn,serialNumber);
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}
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}
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445
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return aclObjects;
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}
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448
|
|
449
|
|
450
|
|
451
|
|
452
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|
453
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/* Get the int value of READ, WRITE or ALL. */
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454
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private static int intValue ( String permission )
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455
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{
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if ( permission.equals("READ") ) {
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return READ;
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} else if ( permission.equals("WRITE") ) {
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return WRITE;
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460
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} else if ( permission.equals("ALL") ) {
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return ALL;
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}
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463
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464
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return -1;
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465
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}
|
466
|
|
467
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/* Get the text value of READ, WRITE or ALL. */
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468
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private String txtValue ( int permission )
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469
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{
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470
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StringBuffer txtPerm = new StringBuffer("\"");
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471
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if ( (permission & READ) != 0 ) {
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472
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txtPerm.append("read");
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473
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}
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474
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if ( (permission & WRITE) != 0 ) {
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475
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if ( txtPerm.length() > 0 ) txtPerm.append(",");
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476
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txtPerm.append("write");
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477
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}
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478
|
if ( (permission & ALL) != 0 ) {
|
479
|
if ( txtPerm.length() > 0 ) txtPerm.append(",");
|
480
|
txtPerm.append("all");
|
481
|
}
|
482
|
|
483
|
return txtPerm.append("\"").toString();
|
484
|
}
|
485
|
|
486
|
public static void main(String[] agus)
|
487
|
{
|
488
|
if(agus.length == 0)
|
489
|
{
|
490
|
System.out.println("you should specify a docid!");
|
491
|
return;
|
492
|
}
|
493
|
String docID = agus[0];
|
494
|
try
|
495
|
{
|
496
|
DBConnectionPool pool = DBConnectionPool.getInstance();
|
497
|
AccessRulesFromDocument xmlDocument = new AccessRulesFromDocument(docID);
|
498
|
Vector rules = xmlDocument.getAccessRuleVector();
|
499
|
Vector docid = xmlDocument.getACLObjects();
|
500
|
for (int i = 0; i<rules.size(); i++)
|
501
|
{
|
502
|
System.out.println("rule: "+(String)rules.elementAt(i));
|
503
|
}
|
504
|
for (int i = 0; i<docid.size(); i++)
|
505
|
{
|
506
|
System.out.println("docid: "+(String)docid.elementAt(i));
|
507
|
}
|
508
|
}
|
509
|
catch(Exception e)
|
510
|
{
|
511
|
System.out.println("exception is: "+e.getMessage());
|
512
|
}
|
513
|
}
|
514
|
|
515
|
}
|