Revision 5334
Added by berkley over 14 years ago
| src/edu/ucsb/nceas/metacat/IdentifierManager.java | ||
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*/ |
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public class IdentifierManager {
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public static final String TYPE_SYSTEM_METADATA = "systemmetadata"; |
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public static final String TYPE_IDENTIFIER = "identifier"; |
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|
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/** |
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* The single instance of the manager that is always returned. |
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*/ |
| ... | ... | |
| 83 | 86 |
*/ |
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public String getLocalId(String guid) throws McdbDocNotFoundException |
| 85 | 88 |
{
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String db_guid = ""; |
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String docid = ""; |
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int rev = 0; |
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String query = "select guid, docid, rev from identifier where guid = ?"; |
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DBConnection dbConn = null; |
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int serialNumber = -1; |
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try {
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// Get a database connection from the pool |
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dbConn = DBConnectionPool.getDBConnection("Identifier.getLocalId");
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serialNumber = dbConn.getCheckOutSerialNumber(); |
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// Execute the insert statement |
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PreparedStatement stmt = dbConn.prepareStatement(query); |
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stmt.setString(1, guid); |
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ResultSet rs = stmt.executeQuery(); |
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if (rs.next()) {
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db_guid = rs.getString(1); |
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docid = rs.getString(2); |
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rev = rs.getInt(3); |
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assert(db_guid.equals(guid)); |
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} else {
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throw new McdbDocNotFoundException("Document not found:" + guid);
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} |
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stmt.close(); |
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} catch (SQLException e) {
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logMetacat.error("Error while looking up the local identifier: "
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+ e.getMessage()); |
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} finally {
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// Return database connection to the pool |
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DBConnectionPool.returnDBConnection(dbConn, serialNumber); |
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} |
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return docid + "." + rev; |
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return this.getId(guid, TYPE_IDENTIFIER); |
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} |
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/** |
| ... | ... | |
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*/ |
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public void createMapping(String guid, String localId) |
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{
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int serialNumber = -1; |
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DBConnection dbConn = null; |
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try {
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// Parse the localId into scope and rev parts |
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AccessionNumber acc = new AccessionNumber(localId, "NOACTION"); |
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String docid = acc.getDocid(); |
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int rev = (new Integer(acc.getRev()).intValue()); |
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// Get a database connection from the pool |
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dbConn = |
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DBConnectionPool.getDBConnection("Identifier.createMapping");
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serialNumber = dbConn.getCheckOutSerialNumber(); |
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// Execute the insert statement |
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String query = "insert into identifier (guid, docid, rev) values (?, ?, ?)"; |
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PreparedStatement stmt = dbConn.prepareStatement(query); |
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stmt.setString(1, guid); |
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stmt.setString(2, docid); |
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stmt.setInt(3, rev); |
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int rows = stmt.executeUpdate(); |
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stmt.close(); |
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} catch (SQLException e) {
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logMetacat.error("SQL error while creating a mapping to the local identifier: "
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+ e.getMessage()); |
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} catch (NumberFormatException e) {
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logMetacat.error("NumberFormat error while creating a mapping to the local identifier: "
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+ e.getMessage()); |
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} catch (AccessionNumberException e) {
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logMetacat.error("AccessionNumber error while creating a mapping to the local identifier: "
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+ e.getMessage()); |
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} finally {
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// Return database connection to the pool |
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DBConnectionPool.returnDBConnection(dbConn, serialNumber); |
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} |
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createGenericMapping(guid, localId, TYPE_IDENTIFIER); |
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} |
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/** |
| ... | ... | |
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*/ |
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public void createSystemMetadataMapping(String guid, String localId) |
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{
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createGenericMapping(guid, localId, TYPE_SYSTEM_METADATA); |
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} |
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/** |
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* return the localId of a system metadata document based on its guid |
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*/ |
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public String getSystemMetadataId(String guid) |
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throws McdbDocNotFoundException |
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{
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return this.getId(guid, TYPE_SYSTEM_METADATA); |
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} |
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/** |
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* return a localId based on a guid. The type can either be 'identifier' |
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* to get an id from the identifier table or 'systemmetadata' to get |
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* the identifier from the systemidentifier table |
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*/ |
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private String getId(String guid, String type) |
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throws McdbDocNotFoundException |
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{
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if(!type.equals(TYPE_IDENTIFIER) && |
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!type.equals(TYPE_SYSTEM_METADATA)) |
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{
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throw new RuntimeException("cannot lookup the identifier for type " + type +
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". Please choose 'identifier' or 'systemmetadata'."); |
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} |
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|
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String db_guid = ""; |
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String docid = ""; |
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int rev = 0; |
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String query = "select guid, docid, rev from " + type + " where guid = ?"; |
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DBConnection dbConn = null; |
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int serialNumber = -1; |
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try {
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// Get a database connection from the pool |
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dbConn = DBConnectionPool.getDBConnection("Identifier.getLocalId");
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serialNumber = dbConn.getCheckOutSerialNumber(); |
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// Execute the insert statement |
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PreparedStatement stmt = dbConn.prepareStatement(query); |
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stmt.setString(1, guid); |
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ResultSet rs = stmt.executeQuery(); |
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if (rs.next()) {
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db_guid = rs.getString(1); |
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docid = rs.getString(2); |
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rev = rs.getInt(3); |
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assert(db_guid.equals(guid)); |
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} else {
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throw new McdbDocNotFoundException("Document not found:" + guid);
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} |
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stmt.close(); |
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} catch (SQLException e) {
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logMetacat.error("Error while looking up the local identifier: "
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+ e.getMessage()); |
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} finally {
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// Return database connection to the pool |
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DBConnectionPool.returnDBConnection(dbConn, serialNumber); |
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} |
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return docid + "." + rev; |
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} |
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private void createGenericMapping(String guid, String localId, String type) |
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{
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if(!type.equals(TYPE_IDENTIFIER) && |
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!type.equals(TYPE_SYSTEM_METADATA)) |
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{
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throw new RuntimeException("Cannot create mapping for type " + type +
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". Please choose 'identifier' or 'systemmetadata'."); |
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} |
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int serialNumber = -1; |
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DBConnection dbConn = null; |
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try {
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|
| ... | ... | |
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serialNumber = dbConn.getCheckOutSerialNumber(); |
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// Execute the insert statement |
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String query = "insert into systemMetadata (guid, docid, rev) values (?, ?, ?)";
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String query = "insert into " + type + " (guid, docid, rev) values (?, ?, ?)";
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PreparedStatement stmt = dbConn.prepareStatement(query); |
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stmt.setString(1, guid); |
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stmt.setString(2, docid); |
Also available in: Unified diff
refactoring to remove duplicate code