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package edu.ucsb.nceas.metacat;
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import java.net.*;
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import java.sql.*;
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import java.sql.PreparedStatement;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import edu.ucsb.nceas.dbadapter.AbstractDatabase;
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private static final AbstractDatabase dbAdapter = MetaCatUtil.dbAdapter;
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//private Connection conn = null;
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private String sitecode = null;
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private String sep = null;
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private String docid = null;
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/**
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* Construct an AccessionNumber
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*/
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//public AccessionNumber ()
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//throws SQLException, ClassNotFoundException
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//{
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// Open a connection to the database from here
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//this((new MetaCatUtil()).openDBConnection());
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//}
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/**
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* Construct an AccessionNumber
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*
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* @param conn the db connection to read from and write Accession# to
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*/
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public AccessionNumber ()
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private AccessionNumber ()
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{
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this.sitecode = MetaCatUtil.getOption("sitecode");
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this.sep = MetaCatUtil.getOption("accNumSeparator");
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//this.conn = conn;
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}
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/** NEW - WHEN CLIENT ALWAYS PROVIDE ACCESSION NUMBER INCLUDING REV IN IT
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}
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}
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/**
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* Generate an Accession Number of form <sidecode>.<uniqueid>.<revisionid>
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* where <revisionid> is always 1.
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*
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* @param docid <sitecode>.<uniqueid> part of Accession Number
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* @param action INSERT, UPDATE or DELETE action
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*/
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public String generate(String docid, String action)
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throws AccessionNumberException, SQLException
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{
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return generate(docid, "1", action);
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}
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/**
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* Generate an Accession Number of form <sidecode>.<uniqueid>.<revisionid>
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*
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* @param docid <sitecode>.<uniqueid> part of Accession Number
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* @param rev <revisionid> of Accession Number
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* @param action INSERT, UPDATE or DELETE action
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*/
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public String generate(String docid, String rev, String action)
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throws AccessionNumberException, SQLException
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{
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try {
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// INSERT
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if ( action.equals("INSERT")) {
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// get a new docid
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if ( docid == null ) {
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String sitecode = getSitecode();
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String uniqueid = getUniqueID(sitecode);
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return sitecode + sep + uniqueid;
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// docid is used; throw an exception to prevent the insertion
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} else if ( accNumberUsed(docid) ) {
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throw new AccessionNumberException
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("Accession number " + docid + " is already in use");
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// rev is <> 1; throw an exception to prevent the insertion
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} else if ( !rev.equals("1") ) {
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throw new AccessionNumberException
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("Revision number must be 1");
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// docid is not used and rev=1; return it
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} else {
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return docid;
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}
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// UPDATE or DELETE
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} else if ( action.equals("UPDATE") || action.equals("DELETE")) {
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// Accession# is not provided; throw an exception to prevent the action
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if ( docid == null ) {
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throw new AccessionNumberException("Accession number is required");
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// Accession# is not current (not in xml_documents); throw an exception
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} else if ( !accNumberIsCurrent(docid) ) {
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throw new AccessionNumberException
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("Document not found for Accession number " + docid);
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// Revision number is not the recent one; throw an exception
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} else if ( !rev.equals(getLastRevision(docid)) ) {
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throw new AccessionNumberException
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("Revision number must be the recent");
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// Accession# is current (present in xml_documents); return it
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} else {
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return docid;
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}
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}
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} catch (SQLException e) {
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throw new SQLException
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("Error on AccessionNumber.generate(): " + e.getMessage());
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}
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// never comes here
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throw new
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AccessionNumberException("Fatal Error in accession number generation");
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}
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// get local sitecode
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private String getSitecode()
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{
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return this.sitecode;
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}
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// get Unique ID from DB sequence
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private String getUniqueID (String sitecode) throws SQLException
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{
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String uniqueid;
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String sysdate = dbAdapter.getDateTimeFunction();
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DBConnection conn = null;
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int serialNumber = -1;
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try {
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PreparedStatement pstmt = null;
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//check out DBConnection
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conn=DBConnectionPool.getDBConnection("AccessionNumber.getUniqueID");
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serialNumber=conn.getCheckOutSerialNumber();
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pstmt = conn.prepareStatement
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("INSERT INTO accession_number (site_code, date_created) " +
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"VALUES (?, " + sysdate + ")");
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pstmt.setString(1, sitecode);
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pstmt.execute();
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pstmt.close();
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uniqueid = "" + dbAdapter.getUniqueID(conn.getConnections(),
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"accession_number");
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//because we only count the connection usage one when it check in
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//but it use twice. So we need to increase one
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conn.increaseUsageCount(1);
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} catch (SQLException e) {
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throw new
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SQLException("Error on AccessionNumber.getUniqueID(): "+e.getMessage());
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}
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finally
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{
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DBConnectionPool.returnDBConnection(conn, serialNumber);
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}
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return uniqueid;
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}
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/** check for existence of Accesssion Number xml_acc_numbers table */
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public static boolean accNumberUsed ( String accNumber )
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throws SQLException {
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return rev;
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}
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// get the next revision number for docid
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private String getNextRevision(String docid) throws SQLException
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{
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String rev = "";
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DBConnection conn = null;
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int serialNumber = -1;
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try {
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PreparedStatement pstmt = null;
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//check out DBConnection
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conn=DBConnectionPool.getDBConnection("AccessionNumber.getNextRevision");
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serialNumber=conn.getCheckOutSerialNumber();
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pstmt = conn.prepareStatement
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("SELECT rev+1 FROM xml_documents WHERE docid='" + docid + "'");
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pstmt.execute();
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ResultSet rs = pstmt.getResultSet();
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boolean hasRow = rs.next();
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rev = rs.getString(1);
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pstmt.close();
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} catch (SQLException e) {
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throw new SQLException(
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"Error on AccessionNumber.getNextRevision(): " + e.getMessage());
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}
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finally
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{
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DBConnectionPool.returnDBConnection(conn, serialNumber);
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}
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return rev;
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}
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/**
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* returns the docid encoded in this accession number
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*/
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Cleaned up AccessionNumber class to get rid of unused methods. It seems the entire accession_number table is no longer used but has not been deleted from the build. Will do in subsequent commit.