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/**
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* '$RCSfile$'
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* Purpose: A Class that represents a docid
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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: Chad Berkley
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* Release: @release@
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*
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* '$Author: bojilova $'
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* '$Date: 2001-05-04 11:12:34 -0700 (Fri, 04 May 2001) $'
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* '$Revision: 736 $'
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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.util.*;
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import java.lang.*;
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import java.sql.*;
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/**
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* A class to parse document ids
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* The docid is of the form siteCode.uniqueId.rev
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*/
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public class DocumentIdentifier
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{
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private String docid = null;
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private String rev = null;
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private String uniqueId = null;
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private String siteCode = null;
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private String separator = null;
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private MetaCatUtil util = new MetaCatUtil();
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/**
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* Constructor to build a docid object and parse an incoming string.
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*/
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public DocumentIdentifier(String docid) throws AccessionNumberException
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{
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this.docid = docid;
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this.separator = util.getOption("accNumSeparator");
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if(docid.endsWith(this.separator))
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{
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throw new AccessionNumberException("Accession number cannot end with " +
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"a seperator.");
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}
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if(docid.startsWith(this.separator))
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{
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throw new AccessionNumberException("Accession number cannot begin with " +
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"a seperator.");
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}
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parseDocid();
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}
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/**
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* parses the docid into its parts
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*/
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private void parseDocid() throws AccessionNumberException
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{
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try {
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int firstIndex = docid.indexOf(separator);
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int lastIndex = docid.lastIndexOf(separator);
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if(firstIndex != lastIndex)
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{ //this docid contains a revision number
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rev = docid.substring(lastIndex + 1);
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uniqueId = docid.substring(firstIndex + 1, lastIndex);
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siteCode = docid.substring(0, firstIndex);
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}
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else
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{
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uniqueId = docid.substring(firstIndex + 1);
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siteCode = docid.substring(0, firstIndex);
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rev = getNewestRev();
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}
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} catch (StringIndexOutOfBoundsException e) {
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throw new
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AccessionNumberException("Error in DocumentIdentifier.parseDocid(). " +
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"Use accession number format as: " +
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"sitecode" + separator + "uniqueid" +
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separator + "revisionid");
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} catch (SQLException e) {
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throw new
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AccessionNumberException("Error in DocumentIdentifier.parseDocid(). " +
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"DB Error when reading revisionid");
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} catch (ClassNotFoundException e) {
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throw new
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AccessionNumberException("Error in DocumentIdentifier.parseDocid(). " +
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e.getMessage());
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}
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try {
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if(rev.equals("newest")) {
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rev = getNewestRev();
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}
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} catch (SQLException e) {
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throw new
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AccessionNumberException("Error in DocumentIdentifier.parseDocid(). " +
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"DB Error when reading revisionid");
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} catch (ClassNotFoundException e) {
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throw new
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AccessionNumberException("Error in DocumentIdentifier.parseDocid(). " +
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e.getMessage());
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}
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}
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/**
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* returns the newest revision number for a document
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*/
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private String getNewestRev() throws SQLException, ClassNotFoundException
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{
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PreparedStatement pstmt;
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Connection conn = null;
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try {
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try {
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//this connection is prone to error for some reason so we
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//try to connect it three times before quiting.
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conn = util.openDBConnection();
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} catch(SQLException sqle) {
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try {
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conn = util.openDBConnection();
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} catch(SQLException sqlee) {
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try {
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conn = util.openDBConnection();
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} catch(SQLException sqleee) {
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System.out.println("error getting db connection in " +
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"MetacatReplication.handleGetDocumentRequest: " +
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sqleee.getMessage());
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}
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}
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}
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pstmt = conn.prepareStatement("select rev from xml_documents where " +
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"docid like '" + docid + "'");
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pstmt.execute();
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ResultSet rs = pstmt.getResultSet();
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boolean tablehasrows = rs.next();
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if (tablehasrows) {
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String retStr = rs.getString(1);
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pstmt.close();
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conn.close();
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return retStr;
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}
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conn.close();
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} catch(SQLException e) {
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System.out.println("error in DocumentIdentifier.getNewestRev(): " +
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e.getMessage());
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try {
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conn.close();
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} catch(SQLException e2) { throw e2; }
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throw e;
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}
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return "1";
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}
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private int countSeparator()
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{
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int count = 0;
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for(int i=0; i<docid.length(); i++)
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{
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if(docid.charAt(i) == '.')
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{
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count++;
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}
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}
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return count;
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}
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/**
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* returns the revision number encoded in this docid
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*/
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public String getRev()
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{
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return rev;
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}
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/**
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* returns the uniqueId encoded in this docid
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*/
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public String getUniqueId()
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{
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return uniqueId;
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}
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/**
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* returns the siteCode encoded in this docid
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*/
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public String getSiteCode()
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{
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return siteCode;
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}
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/**
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* returns the separator used in the accession number
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*/
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public String getSeparator()
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{
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return separator;
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}
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/**
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* returns <siteCode><sepatator><uniqueId>
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*/
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public String getIdentifier()
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{
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return siteCode + separator + uniqueId;
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}
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/**
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* returns the whole docid as a string
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*/
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public String toString()
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{
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return docid;
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}
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/**
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* Test driver. The first command line argument is the docid you want to
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* create an object for. For instance ">java DocumentIdentifer nceas.1.2"
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* will return "rev: 2 \n uniqueId: 1 \n siteCode: nceas \n"
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*/
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public static void main(String args[])
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{
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try
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{
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DocumentIdentifier d = new DocumentIdentifier(args[0]);
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System.out.println("rev: " + d.getRev());
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System.out.println("uniqueId: " + d.getUniqueId());
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System.out.println("siteCode: " + d.getSiteCode());
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}
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catch(Exception e)
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{
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System.out.println("error: " + e.getMessage());
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}
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}
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}
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