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bojilova
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/**
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jones
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* Name: AccessionNumber.java
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* Purpose: A class that gets Accession Number, check for uniqueness
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* and register it into db
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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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bojilova
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*
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jones
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* Version: '$Id$'
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bojilova
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*/
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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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bojilova
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import java.util.PropertyResourceBundle;
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bojilova
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147
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bojilova
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/**
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* A class that gets Accession Number, check for uniqueness and register it
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* into db connection
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*/
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bojilova
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public class AccessionNumber {
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bojilova
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/**
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* This method gets Accession Number (if any), check for uniqueness
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* and register it into new db connection
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* @param accNumber - accession # if provided or null if not
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* @param action - INSERT, UPDATE or DELETE.
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* When "INSERT" and accession # provided is not unique, get next one.
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* If it is unique, use it.
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* When "INSERT" and accession # is null, get a new one.
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* When "UPDATE", accession # is required.
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* When "DELETE", accession # is required.
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*/
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bojilova
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public static String generate (String accNumber, String action)
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jones
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throws ClassNotFoundException, StringIndexOutOfBoundsException,
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SQLException
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bojilova
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{
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145
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bojilova
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bojilova
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String globalName = null;
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String localId = null;
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PropertyResourceBundle options = null;
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options = (PropertyResourceBundle)
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PropertyResourceBundle.getBundle("edu.ucsb.nceas.metacat.metacat");
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bojilova
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String dbDriver = (String)options.handleGetObject("dbDriver");
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String defaultDB = (String)options.handleGetObject("defaultDB");
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String user = (String)options.handleGetObject("user");
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String password = (String)options.handleGetObject("password");
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jones
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String defaultGlobalName =
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(String)options.handleGetObject("defaultGlobalName");
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bojilova
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String sep = (String)options.handleGetObject("accNumberSeparator");
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try {
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// Open a new connection to the database
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jones
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Connection conn = MetaCatUtil.openDBConnection(dbDriver,
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defaultDB, user, password);
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bojilova
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conn.setAutoCommit(true);
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// split the acc # in 2 parts - global name & local id
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if ( accNumber != null ) {
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globalName = getGlobalName(accNumber, sep);
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localId = getLocalId(accNumber, sep);
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}
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// register unique acc #
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if ( action == "INSERT" )
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if ( accNumber == null )
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return put(conn, defaultGlobalName, null, sep);
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else
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return put(conn, globalName, localId, sep);
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bojilova
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conn.close();
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bojilova
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} catch (SQLException e) {
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jones
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System.out.println(
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"Error on AccessionNumber.genAccessionNumber(): " +
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e.getMessage());
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throw e;
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}
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return null;
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bojilova
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}
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bojilova
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bojilova
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/** put unique accession # into db connection */
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jones
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private static String put (Connection conn, String globalName,
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String localId, String sep)
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bojilova
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throws SQLException
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{
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Integer l = null;
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try {
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if ( localId == null )
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l = new Integer(get(conn, globalName) + 1);
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bojilova
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else if ( exist(conn, globalName, localId) )
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l = new Integer(get(conn, globalName) + 1);
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else
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l = new Integer(localId);
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// insert globalName & l
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PreparedStatement pstmt;
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jones
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pstmt = conn.prepareStatement(
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"INSERT INTO xml_acc_numbers (global_name, local_id) " +
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"VALUES (?, ?)");
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bojilova
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pstmt.setString(1,globalName);
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pstmt.setString(2,l.toString());
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pstmt.execute();
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bojilova
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pstmt.close();
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bojilova
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} catch (SQLException e) {
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jones
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System.out.println(
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"Error on AccessionNumber.put(conn, globalName, localId): "
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+ e.getMessage());
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bojilova
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throw e;
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}
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return globalName + sep + l;
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}
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145
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bojilova
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/** check for existance of Accesssion Number */
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171
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bojilova
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private static boolean exist (Connection conn, String globalName,
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168
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jones
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String localId) throws SQLException
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160
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bojilova
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{
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145
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bojilova
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boolean hasAccNumber = false;
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try {
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PreparedStatement pstmt;
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168
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jones
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pstmt = conn.prepareStatement(
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"SELECT 'x' FROM xml_acc_numbers " +
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"WHERE global_name LIKE ? AND local_id = ?");
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bojilova
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pstmt.setString(1,globalName);
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pstmt.setString(2,localId);
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pstmt.execute();
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ResultSet rs = pstmt.getResultSet();
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hasAccNumber = rs.next();
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pstmt.close();
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} catch (SQLException e) {
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169
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jones
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System.out.println("Error on AccessionNumber.unique(globalName, " +
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"localId): " + e.getMessage());
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160
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bojilova
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throw e;
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145
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bojilova
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}
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return hasAccNumber;
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}
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171
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bojilova
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/** get the last in order local ID by a given global name */
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160
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bojilova
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private static int get (Connection conn, String globalName)
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throws SQLException
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{
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145
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bojilova
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try {
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PreparedStatement pstmt;
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168
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jones
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pstmt = conn.prepareStatement(
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"SELECT max(local_id) FROM xml_acc_numbers " +
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"WHERE global_name LIKE ?");
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bojilova
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pstmt.setString(1,globalName);
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pstmt.execute();
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ResultSet rs = pstmt.getResultSet();
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boolean hasLocalId = rs.next();
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if (hasLocalId)
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return rs.getInt(1);
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pstmt.close();
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} catch (SQLException e) {
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168
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jones
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System.out.println(
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"Error on AccessionNumber.get(): " + e.getMessage());
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160
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bojilova
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throw e;
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145
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bojilova
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}
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160
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bojilova
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return 0;
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145
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bojilova
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}
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// get the global part of the accession number
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160
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bojilova
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private static String getGlobalName (String accNumber, String sep)
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145
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bojilova
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throws StringIndexOutOfBoundsException {
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160
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bojilova
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return accNumber.substring(0, accNumber.lastIndexOf(sep));
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145
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bojilova
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}
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// get the local part of the accession number
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160
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bojilova
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private static String getLocalId (String accNumber, String sep)
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145
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bojilova
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throws StringIndexOutOfBoundsException {
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160
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bojilova
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return accNumber.substring(accNumber.lastIndexOf(sep)+1);
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145
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bojilova
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}
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}
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