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Atmire dspace 3.0 versioning contribution
Versioning : Add Spring WebMVC Control Versioning : AIP Prototype Test Improvements.
This commit is contained in:
Mark Diggory
@@ -0,0 +1,689 @@
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/**
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* The contents of this file are subject to the license and copyright
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* detailed in the LICENSE and NOTICE files at the root of the source
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* tree and available online at
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*
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* http://www.dspace.org/license/
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*/
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package org.dspace.identifier;
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import org.apache.log4j.Logger;
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import org.dspace.authorize.AuthorizeException;
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import org.dspace.content.*;
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import org.dspace.core.ConfigurationManager;
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import org.dspace.core.Constants;
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import org.dspace.core.Context;
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import org.dspace.core.LogManager;
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import org.dspace.storage.rdbms.DatabaseManager;
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import org.dspace.storage.rdbms.TableRow;
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import org.dspace.utils.DSpace;
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import org.dspace.versioning.*;
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import org.springframework.stereotype.Component;
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import java.io.IOException;
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import java.sql.SQLException;
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import java.util.Date;
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/**
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*
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*
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* @author Fabio Bolognesi (fabio at atmire dot com)
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* @author Mark Diggory (markd at atmire dot com)
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* @author Ben Bosman (ben at atmire dot com)
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*/
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@Component
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public class VersionedHandleIdentifierProvider extends IdentifierProvider {
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/** log4j category */
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private static Logger log = Logger.getLogger(VersionedHandleIdentifierProvider.class);
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/** Prefix registered to no one */
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static final String EXAMPLE_PREFIX = "123456789";
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private static final char DOT = '.';
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private String[] supportedPrefixes = new String[]{"info:hdl", "hdl", "http://"};
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private VersionDAO versionDAO;
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private VersionHistoryDAO versionHistoryDAO;
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@Override
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public boolean supports(Class<? extends Identifier> identifier)
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{
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return Handle.class.isAssignableFrom(identifier);
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}
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public boolean supports(String identifier)
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{
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for(String prefix : supportedPrefixes)
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{
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if(identifier.startsWith(prefix))
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{
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return true;
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}
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}
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try {
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String outOfUrl = retrieveHandleOutOfUrl(identifier);
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if(outOfUrl != null)
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{
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return true;
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}
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} catch (SQLException e) {
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log.error(e.getMessage(), e);
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}
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return false;
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}
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public String register(Context context, DSpaceObject dso)
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{
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try
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{
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String id = mint(context, dso);
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// move canonical to point the latest version
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if(dso != null && dso.getType() == Constants.ITEM)
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{
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Item item = (Item)dso;
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VersionHistory history = retrieveVersionHistory(context, (Item)dso);
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if(history!=null)
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{
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String canonical = getCanonical(item);
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// Modify Canonical: 12345/100 will point to the new item
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TableRow canonicalRecord = findHandleInternal(context, canonical);
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modifyHandleRecord(context, dso, canonicalRecord, canonical);
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// in case of first version we have to modify the previous metadata to be xxxx.1
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Version version = history.getVersion(item);
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Version previous = history.getPrevious(version);
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if (history.isFirstVersion(previous))
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{
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modifyHandleMetadata(previous.getItem(), (canonical + DOT + 1));
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}
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// Check if our previous item hasn't got a handle anymore.
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// This only occurs when a switch has been made from the standard handle identifier provider
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// to the versioned one, in this case no "versioned handle" is reserved so we need to create one
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if(previous != null && getHandleInternal(context, Constants.ITEM, previous.getItemID()) == null){
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makeIdentifierBasedOnHistory(context, previous.getItem(), canonical, history);
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}
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}
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populateHandleMetadata(item);
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}
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return id;
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}catch (Exception e){
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log.error(LogManager.getHeader(context, "Error while attempting to create handle", "Item id: " + (dso != null ? dso.getID() : "")), e);
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throw new RuntimeException("Error while attempting to create identifier for Item id: " + (dso != null ? dso.getID() : ""));
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}
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}
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public void register(Context context, DSpaceObject dso, String identifier)
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{
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try
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{
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Item item = (Item) dso;
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// if for this identifier is already present a record in the Handle table and the corresponding item
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// has an history someone is trying to restore the latest version for the item. When
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// trying to restore the latest version the identifier in input doesn't have the for 1234/123.latestVersion
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// it is the canonical 1234/123
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VersionHistory itemHistory = getHistory(context, identifier);
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if(!identifier.matches(".*/.*\\.\\d+") && itemHistory!=null){
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int newVersionNumber = itemHistory.getLatestVersion().getVersionNumber()+1;
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String canonical = identifier;
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identifier = identifier.concat(".").concat("" + newVersionNumber);
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restoreItAsVersion(context, dso, identifier, item, canonical, itemHistory);
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}
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// if identifier == 1234.5/100.4 reinstate the version 4 in the version table if absent
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else if(identifier.matches(".*/.*\\.\\d+"))
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{
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// if it is a version of an item is needed to put back the record
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// in the versionitem table
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String canonical = getCanonical(identifier);
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DSpaceObject canonicalItem = this.resolve(context, canonical);
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if(canonicalItem==null){
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restoreItAsCanonical(context, dso, identifier, item, canonical);
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}
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else{
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VersionHistory history = retrieveVersionHistory(context, (Item)canonicalItem);
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if(history==null){
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restoreItAsCanonical(context, dso, identifier, item, canonical);
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}
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else
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{
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restoreItAsVersion(context, dso, identifier, item, canonical, history);
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}
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}
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}
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else
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{
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//A regular handle
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createNewIdentifier(context, dso, identifier);
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if(dso instanceof Item)
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{
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populateHandleMetadata(item);
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}
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}
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}catch (Exception e){
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log.error(LogManager.getHeader(context, "Error while attempting to create handle", "Item id: " + dso.getID()), e);
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throw new RuntimeException("Error while attempting to create identifier for Item id: " + dso.getID(), e);
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}
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}
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private VersionHistory getHistory(Context context, String identifier)
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{
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DSpaceObject item = this.resolve(context, identifier);
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if(item!=null){
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VersionHistory history = retrieveVersionHistory(context, (Item)item);
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return history;
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}
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return null;
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}
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private void restoreItAsVersion(Context context, DSpaceObject dso, String identifier, Item item, String canonical, VersionHistory history) throws SQLException, IOException, AuthorizeException
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{
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createNewIdentifier(context, dso, identifier);
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populateHandleMetadata(item);
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int versionNumber = Integer.parseInt(identifier.substring(identifier.lastIndexOf(".") + 1));
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createVersion(context, history, item, "Restoring from AIP Service", new Date(), versionNumber);
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Version latest = history.getLatestVersion();
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// if restoring the lastest version: needed to move the canonical
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if(latest.getVersionNumber() < versionNumber){
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TableRow canonicalRecord = findHandleInternal(context, canonical);
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modifyHandleRecord(context, dso, canonicalRecord, canonical);
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}
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}
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private void restoreItAsCanonical(Context context, DSpaceObject dso, String identifier, Item item, String canonical) throws SQLException, IOException, AuthorizeException
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{
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createNewIdentifier(context, dso, identifier);
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populateHandleMetadata(item);
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int versionNumber = Integer.parseInt(identifier.substring(identifier.lastIndexOf(".")+1));
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VersionHistory history=versionHistoryDAO.create(context);
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createVersion(context, history, item, "Restoring from AIP Service", new Date(), versionNumber);
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TableRow canonicalRecord = findHandleInternal(context, canonical);
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modifyHandleRecord(context, dso, canonicalRecord, canonical);
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}
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public void reserve(Context context, DSpaceObject dso, String identifier)
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{
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try{
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TableRow handle = DatabaseManager.create(context, "Handle");
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modifyHandleRecord(context, dso, handle, identifier);
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}catch(Exception e){
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log.error(LogManager.getHeader(context, "Error while attempting to create handle", "Item id: " + dso.getID()), e);
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throw new RuntimeException("Error while attempting to create identifier for Item id: " + dso.getID());
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}
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}
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/**
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* Creates a new handle in the database.
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*
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* @param context DSpace context
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* @param dso The DSpaceObject to create a handle for
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* @return The newly created handle
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*/
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public String mint(Context context, DSpaceObject dso)
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{
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if(dso.getHandle() != null)
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{
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return dso.getHandle();
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}
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try{
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String handleId = null;
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VersionHistory history = null;
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if(dso instanceof Item)
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{
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history = retrieveVersionHistory(context, (Item)dso);
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}
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if(history!=null)
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{
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handleId = makeIdentifierBasedOnHistory(context, dso, handleId, history);
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}else{
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handleId = createNewIdentifier(context, dso, null);
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}
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return handleId;
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}catch (Exception e){
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log.error(LogManager.getHeader(context, "Error while attempting to create handle", "Item id: " + dso.getID()), e);
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throw new RuntimeException("Error while attempting to create identifier for Item id: " + dso.getID());
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}
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}
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public DSpaceObject resolve(Context context, String identifier, String... attributes)
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{
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// We can do nothing with this, return null
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try{
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TableRow dbhandle = findHandleInternal(context, identifier);
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if (dbhandle == null)
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{
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//Check for an url
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identifier = retrieveHandleOutOfUrl(identifier);
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if(identifier != null)
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{
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dbhandle = findHandleInternal(context, identifier);
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}
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if(dbhandle == null)
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{
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return null;
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}
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}
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if ((dbhandle.isColumnNull("resource_type_id"))
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|| (dbhandle.isColumnNull("resource_id")))
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{
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throw new IllegalStateException("No associated resource type");
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}
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// What are we looking at here?
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int handletypeid = dbhandle.getIntColumn("resource_type_id");
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int resourceID = dbhandle.getIntColumn("resource_id");
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if (handletypeid == Constants.ITEM)
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{
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Item item = Item.find(context, resourceID);
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if (log.isDebugEnabled())
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{
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log.debug("Resolved handle " + identifier + " to item "
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+ ((item == null) ? (-1) : item.getID()));
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}
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return item;
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}
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else if (handletypeid == Constants.COLLECTION)
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{
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Collection collection = Collection.find(context, resourceID);
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if (log.isDebugEnabled()) {
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log.debug("Resolved handle " + identifier + " to collection "
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+ ((collection == null) ? (-1) : collection.getID()));
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}
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return collection;
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}
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else if (handletypeid == Constants.COMMUNITY)
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{
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Community community = Community.find(context, resourceID);
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if (log.isDebugEnabled()) {
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log.debug("Resolved handle " + identifier + " to community "
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+ ((community == null) ? (-1) : community.getID()));
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}
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return community;
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}
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}catch (Exception e){
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log.error(LogManager.getHeader(context, "Error while resolving handle to item", "handle: " + identifier), e);
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}
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// throw new IllegalStateException("Unsupported Handle Type "
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// + Constants.typeText[handletypeid]);
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return null;
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}
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@Override
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public String lookup(Context context, DSpaceObject dso) throws IdentifierNotFoundException, IdentifierNotResolvableException {
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try
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{
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TableRow row = getHandleInternal(context, dso.getType(), dso.getID());
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if (row == null)
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{
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if (dso.getType() == Constants.SITE)
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{
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return Site.getSiteHandle();
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}
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else
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{
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return null;
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}
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}
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else
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{
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return row.getStringColumn("handle");
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}
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}catch(SQLException sqe){
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throw new IdentifierNotResolvableException(sqe.getMessage(),sqe);
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}
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}
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@Override
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public void delete(Context context, DSpaceObject dso, String identifier) throws IdentifierException {
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delete(context, dso);
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}
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public void delete(Context context, DSpaceObject dso) throws IdentifierException {
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try {
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if (dso instanceof Item)
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{
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Item item = (Item) dso;
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// If it is the most current version occurs to move the canonical to the previous version
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VersionHistory history = retrieveVersionHistory(context, item);
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if(history!=null && history.getLatestVersion().getItem().equals(item) && history.size() > 1)
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{
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Item previous = history.getPrevious(history.getLatestVersion()).getItem();
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// Modify Canonical: 12345/100 will point to the new item
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String canonical = getCanonical(previous);
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TableRow canonicalRecord = findHandleInternal(context, canonical);
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modifyHandleRecord(context, previous, canonicalRecord, canonical);
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}
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}
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} catch (Exception e) {
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log.error(LogManager.getHeader(context, "Error while attempting to register doi", "Item id: " + dso.getID()), e);
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throw new IdentifierException("Error while moving doi identifier", e);
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}
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|
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}
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public static String retrieveHandleOutOfUrl(String url) throws SQLException
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{
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// We can do nothing with this, return null
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if (!url.contains("/")) return null;
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||||
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String[] splitUrl = url.split("/");
|
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return splitUrl[splitUrl.length - 2] + "/" + splitUrl[splitUrl.length - 1];
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}
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|
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/**
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* Get the configured Handle prefix string, or a default
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* @return configured prefix or "123456789"
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*/
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||||
public static String getPrefix()
|
||||
{
|
||||
String prefix = ConfigurationManager.getProperty("handle.prefix");
|
||||
if (null == prefix)
|
||||
{
|
||||
prefix = EXAMPLE_PREFIX; // XXX no good way to exit cleanly
|
||||
log.error("handle.prefix is not configured; using " + prefix);
|
||||
}
|
||||
return prefix;
|
||||
}
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||||
|
||||
protected static String getCanonicalForm(String handle)
|
||||
{
|
||||
|
||||
// Let the admin define a new prefix, if not then we'll use the
|
||||
// CNRI default. This allows the admin to use "hdl:" if they want to or
|
||||
// use a locally branded prefix handle.myuni.edu.
|
||||
String handlePrefix = ConfigurationManager.getProperty("handle.canonical.prefix");
|
||||
if (handlePrefix == null || handlePrefix.length() == 0)
|
||||
{
|
||||
handlePrefix = "http://hdl.handle.net/";
|
||||
}
|
||||
|
||||
return handlePrefix + handle;
|
||||
}
|
||||
|
||||
protected String createNewIdentifier(Context context, DSpaceObject dso, String handleId) throws SQLException {
|
||||
TableRow handle=null;
|
||||
if(handleId != null)
|
||||
{
|
||||
handle = findHandleInternal(context, handleId);
|
||||
|
||||
|
||||
if(handle!=null && !handle.isColumnNull("resource_id"))
|
||||
{
|
||||
//Check if this handle is already linked up to this specified DSpace Object
|
||||
int resourceID = handle.getIntColumn("resource_id");
|
||||
int resourceType = handle.getIntColumn("resource_type_id");
|
||||
|
||||
if(resourceID==dso.getID() && resourceType ==dso.getType())
|
||||
{
|
||||
//This handle already links to this DSpace Object -- so, there's nothing else we need to do
|
||||
return handleId;
|
||||
}
|
||||
else
|
||||
{
|
||||
//handle found in DB table & already in use by another existing resource
|
||||
throw new IllegalStateException("Attempted to create a handle which is already in use: " + handleId);
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
else if(handle!=null && !handle.isColumnNull("resource_type_id"))
|
||||
{
|
||||
//If there is a 'resource_type_id' (but 'resource_id' is empty), then the object using
|
||||
// this handle was previously unbound (see unbindHandle() method) -- likely because object was deleted
|
||||
int previousType = handle.getIntColumn("resource_type_id");
|
||||
|
||||
//Since we are restoring an object to a pre-existing handle, double check we are restoring the same *type* of object
|
||||
// (e.g. we will not allow an Item to be restored to a handle previously used by a Collection)
|
||||
if(previousType != dso.getType())
|
||||
{
|
||||
throw new IllegalStateException("Attempted to reuse a handle previously used by a " +
|
||||
Constants.typeText[previousType] + " for a new " +
|
||||
Constants.typeText[dso.getType()]);
|
||||
}
|
||||
}
|
||||
|
||||
if(handle==null){
|
||||
handle = DatabaseManager.create(context, "Handle");
|
||||
handleId = createId(handle.getIntColumn("handle_id"));
|
||||
}
|
||||
|
||||
modifyHandleRecord(context, dso, handle, handleId);
|
||||
return handleId;
|
||||
}
|
||||
|
||||
protected String makeIdentifierBasedOnHistory(Context context, DSpaceObject dso, String handleId, VersionHistory history) throws AuthorizeException, SQLException
|
||||
{
|
||||
Item item = (Item)dso;
|
||||
|
||||
// FIRST time a VERSION is created 2 identifiers will be minted and the canonical will be updated to point to the newer URL:
|
||||
// - id.1-->old URL
|
||||
// - id.2-->new URL
|
||||
Version version = history.getVersion(item);
|
||||
Version previous = history.getPrevious(version);
|
||||
String canonical = getCanonical(previous.getItem());
|
||||
if (history.isFirstVersion(previous))
|
||||
{
|
||||
// add a new Identifier for previous item: 12345/100.1
|
||||
String identifierPreviousItem=canonical + DOT + 1;
|
||||
TableRow handle = DatabaseManager.create(context, "Handle");
|
||||
modifyHandleRecord(context, previous.getItem(), handle, identifierPreviousItem);
|
||||
}
|
||||
|
||||
|
||||
// add a new Identifier for this item: 12345/100.x
|
||||
String idNew = canonical + DOT + version.getVersionNumber();
|
||||
TableRow handle = DatabaseManager.create(context, "Handle");
|
||||
modifyHandleRecord(context, dso, handle, idNew);
|
||||
|
||||
return handleId;
|
||||
}
|
||||
|
||||
|
||||
protected String modifyHandleRecord(Context context, DSpaceObject dso, TableRow handle, String handleId) throws SQLException
|
||||
{
|
||||
handle.setColumn("handle", handleId);
|
||||
handle.setColumn("resource_type_id", dso.getType());
|
||||
handle.setColumn("resource_id", dso.getID());
|
||||
DatabaseManager.update(context, handle);
|
||||
|
||||
if (log.isDebugEnabled())
|
||||
{
|
||||
log.debug("Created new handle for "
|
||||
+ Constants.typeText[dso.getType()] + " " + handleId);
|
||||
}
|
||||
return handleId;
|
||||
}
|
||||
|
||||
protected String getCanonical(Item item)
|
||||
{
|
||||
String canonical = item.getHandle();
|
||||
if( canonical.lastIndexOf(DOT)!=-1)
|
||||
{
|
||||
canonical = canonical.substring(0, canonical.lastIndexOf(DOT));
|
||||
}
|
||||
|
||||
return canonical;
|
||||
}
|
||||
|
||||
protected String getCanonical(String identifier)
|
||||
{
|
||||
String canonical = identifier;
|
||||
if( canonical.lastIndexOf(DOT)!=-1)
|
||||
{
|
||||
canonical = canonical.substring(0, canonical.lastIndexOf(DOT));
|
||||
}
|
||||
|
||||
return canonical;
|
||||
}
|
||||
|
||||
/**
|
||||
* Find the database row corresponding to handle.
|
||||
*
|
||||
* @param context DSpace context
|
||||
* @param handle The handle to resolve
|
||||
* @return The database row corresponding to the handle
|
||||
* @exception java.sql.SQLException If a database error occurs
|
||||
*/
|
||||
protected static TableRow findHandleInternal(Context context, String handle)
|
||||
throws SQLException {
|
||||
if (handle == null)
|
||||
{
|
||||
throw new IllegalArgumentException("Handle is null");
|
||||
}
|
||||
|
||||
return DatabaseManager.findByUnique(context, "Handle", "handle", handle);
|
||||
}
|
||||
|
||||
/**
|
||||
* Return the handle for an Object, or null if the Object has no handle.
|
||||
*
|
||||
* @param context
|
||||
* DSpace context
|
||||
* @param type
|
||||
* The type of object
|
||||
* @param id
|
||||
* The id of object
|
||||
* @return The handle for object, or null if the object has no handle.
|
||||
* @exception java.sql.SQLException
|
||||
* If a database error occurs
|
||||
*/
|
||||
protected static TableRow getHandleInternal(Context context, int type, int id)
|
||||
throws SQLException
|
||||
{
|
||||
String sql = "SELECT * FROM Handle WHERE resource_type_id = ? AND resource_id = ?";
|
||||
|
||||
return DatabaseManager.querySingleTable(context, "Handle", sql, type, id);
|
||||
}
|
||||
|
||||
/**
|
||||
* Create a new handle id. The implementation uses the PK of the RDBMS
|
||||
* Handle table.
|
||||
*
|
||||
* @return A new handle id
|
||||
* @exception java.sql.SQLException
|
||||
* If a database error occurs
|
||||
*/
|
||||
protected static String createId(int id) throws SQLException
|
||||
{
|
||||
String handlePrefix = getPrefix();
|
||||
|
||||
return handlePrefix + (handlePrefix.endsWith("/") ? "" : "/") + id;
|
||||
}
|
||||
|
||||
|
||||
protected VersionHistory retrieveVersionHistory(Context c, Item item)
|
||||
{
|
||||
VersioningService versioningService = new DSpace().getSingletonService(VersioningService.class);
|
||||
return versioningService.findVersionHistory(c, item.getID());
|
||||
}
|
||||
|
||||
protected void populateHandleMetadata(Item item)
|
||||
throws SQLException, IOException, AuthorizeException
|
||||
{
|
||||
String handleref = getCanonicalForm(getCanonical(item));
|
||||
|
||||
// Add handle as identifier.uri DC value.
|
||||
// First check that identifier doesn't already exist.
|
||||
boolean identifierExists = false;
|
||||
DCValue[] identifiers = item.getDC("identifier", "uri", Item.ANY);
|
||||
for (DCValue identifier : identifiers)
|
||||
{
|
||||
if (handleref.equals(identifier.value))
|
||||
{
|
||||
identifierExists = true;
|
||||
}
|
||||
}
|
||||
if (!identifierExists)
|
||||
{
|
||||
item.addDC("identifier", "uri", null, handleref);
|
||||
}
|
||||
}
|
||||
|
||||
protected void modifyHandleMetadata(Item item, String handle)
|
||||
throws SQLException, IOException, AuthorizeException
|
||||
{
|
||||
String handleref = getCanonicalForm(handle);
|
||||
item.clearMetadata("dc", "identifier", "uri", Item.ANY);
|
||||
item.addDC("identifier", "uri", null, handleref);
|
||||
item.update();
|
||||
}
|
||||
|
||||
|
||||
protected VersionImpl createVersion(Context c, VersionHistory vh, Item item, String summary, Date date, int versionNumber) {
|
||||
try {
|
||||
VersionImpl version = versionDAO.create(c);
|
||||
|
||||
// check if an equals versionNumber is already present in the DB (at this point it should never happen).
|
||||
if(vh!=null && vh.getVersions()!=null){
|
||||
for(Version v : vh.getVersions()){
|
||||
if(v.getVersionNumber()==versionNumber){
|
||||
throw new RuntimeException("A Version for this versionNumber is already present. Impossible complete the operation.");
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
version.setVersionNumber(versionNumber);
|
||||
version.setVersionDate(date);
|
||||
version.setEperson(item.getSubmitter());
|
||||
version.setItemID(item.getID());
|
||||
version.setSummary(summary);
|
||||
version.setVersionHistory(vh.getVersionHistoryId());
|
||||
versionDAO.update(version);
|
||||
return version;
|
||||
} catch (SQLException e) {
|
||||
throw new RuntimeException(e.getMessage(), e);
|
||||
}
|
||||
}
|
||||
|
||||
protected int getNextVersionNumer(Version latest){
|
||||
if(latest==null) return 1;
|
||||
|
||||
return latest.getVersionNumber()+1;
|
||||
}
|
||||
|
||||
public void setVersionDAO(VersionDAO versionDAO)
|
||||
{
|
||||
this.versionDAO = versionDAO;
|
||||
}
|
||||
|
||||
public void setVersionHistoryDAO(VersionHistoryDAO versionHistoryDAO)
|
||||
{
|
||||
this.versionHistoryDAO = versionHistoryDAO;
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user