Examples of org.exist.collections.Collection

org.exist.collections.Collection
This class represents a collection in the database. A collection maintains a list of sub-collections and documents, and provides the methods to store/remove resources. Collections are shared between {@link org.exist.storage.DBBroker} instances. The calleris responsible to lock/unlock the collection. Call {@link DBBroker#openCollection(XmldbURI,int)}to get a collection with a read or write lock and {@link #release(int)} to release the lock. @author wolf

        broker = db.get(null);
      } catch (final EXistException e) {
        return false;
      }
  
          final Collection collection = broker.getCollection(uri.toCollectionPathURI());
          if (collection != null) {return true;}
  
          final Collection parent_collection = broker.getCollection(uri.toCollectionPathURI().removeLastSegment());
          if (parent_collection == null) {return false;}
  
          tm = db.getTransactionManager();
      final Txn transaction = tm.beginTransaction();
      
      try {
        final Collection child = broker.getOrCreateCollection(transaction, uri.toCollectionPathURI());
        broker.saveCollection(transaction, child);
        tm.commit(transaction);
      } catch (final Exception e) {
          tm.abort(transaction);
        return false;

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        broker = db.get(null);
      } catch (final EXistException e) {
        return false;
      }
  
          final Collection collection = broker.getCollection(uri.toCollectionPathURI());
          if (collection != null) {return true;}
  
      tm = db.getTransactionManager();
      final Txn transaction = tm.beginTransaction();
      
      try {
        final Collection child = broker.getOrCreateCollection(transaction, uri.toCollectionPathURI());
        broker.saveCollection(transaction, child);
        tm.commit(transaction);
      } catch (final Exception e) {
          tm.abort(transaction);
        return false;

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            transact = pool.getTransactionManager();
            assertNotNull(transact);
            transaction = transact.beginTransaction();
            assertNotNull(transaction);


            Collection root = broker.getOrCreateCollection(transaction, TestConstants.TEST_COLLECTION_URI);
        broker.saveCollection(transaction, root);
            assertNotNull(root);


            root.addBinaryResource(transaction, broker, XmldbURI.create(name), data.getBytes(), "application/xquery");


            transact.commit(transaction);
        } catch (Exception e) {
            if (transact != null)
                transact.abort(transaction);

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        public boolean hasNext() {
            return nextCollection != null;
        }


        public Collection next() {
            final Collection oldCollection = nextCollection;
            nextCollection = null;
            while (nodeIterator.hasNext()) {
                final NodeProxy p = nodeIterator.next();
                if (!p.getDocument().getCollection().equals(oldCollection)) {
                    nextCollection = p.getDocument().getCollection();

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    public final static IndexFlags checkForQNameIndex( IndexFlags idxflags, XQueryContext context, Sequence contextSequence, QName contextQName )
    {
        idxflags.reset( contextQName != null );


        for( final Iterator<Collection> i = contextSequence.getCollectionIterator(); i.hasNext(); ) {
            final Collection collection = i.next();


            if( collection.getURI().equalsInternal( XmldbURI.SYSTEM_COLLECTION_URI ) ) {
                continue;
            }
            final IndexSpec idxcfg = collection.getIndexConfiguration( context.getBroker() );


            if( idxflags.indexOnQName && ( idxcfg.getIndexByQName( contextQName ) == null ) ) {
                idxflags.indexOnQName = false;


                if( LOG.isTraceEnabled() ) {
                    LOG.trace( "cannot use index on QName: " + contextQName + ". Collection " + collection.getURI() + " does not define an index" );
                }
            }


            if( !idxflags.hasIndexOnQNames && idxcfg.hasIndexesByQName() ) {
                idxflags.hasIndexOnQNames = true;

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                        doc = context.getBroker().getXMLResource(xmldburi, Lock.READ_LOCK);


                        if(doc == null)
                        {
                            // no doc, try for a collection
                            Collection col = context.getBroker().getCollection(xmldburi);


                            if(col != null)
                            {
                                // got a collection
                                compressCollection(os, col, useHierarchy, stripOffset);

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    }
    // iterate over child collections
    for (Iterator<XmldbURI> itChildCols = col.collectionIterator(context.getBroker()); itChildCols.hasNext();) {
      // get the child collection
      XmldbURI childColURI = (XmldbURI) itChildCols.next();
      Collection childCol = context.getBroker().getCollection(col.getURI().append(childColURI));
      // recurse
      compressCollection(os, childCol, useHierarchy, stripOffset);
    }
  }

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 */
public class Utils {


    public static Collection createCollection(DBBroker broker, Txn txn, XmldbURI uri) throws PermissionDeniedException, IOException, LockException, TriggerException {


        final Collection collection = broker.getOrCreateCollection(txn, uri);


        if(collection == null) {
            throw new IOException("Collection " + uri + " cannot be created.");
        }


        collection.setPermissions(Permission.DEFAULT_SYSTEM_SECURITY_COLLECTION_PERM);
        broker.saveCollection(txn, collection);


        return collection;
    }

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        return collection;
    }
    
    public static Collection getOrCreateCollection(DBBroker broker, Txn txn, XmldbURI collectionUri) throws PermissionDeniedException, IOException, LockException, TriggerException {
        Collection col = broker.getCollection(collectionUri);
        if(col == null) {
            col = createCollection(broker, txn, collectionUri);
        }
        return col;
    }

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            }
        }
        final TransactionManager mgr = broker.getBrokerPool().getTransactionManager();
        final Txn txn = mgr.beginTransaction();
        try {
            Collection collection = broker.getOrCreateCollection(txn, targetCollection);
            if (collection != null)
                {broker.removeCollection(txn, collection);}
            if (target != null) {
                final XmldbURI configCollection = XmldbURI.CONFIG_COLLECTION_URI.append(targetCollection);
                collection = broker.getOrCreateCollection(txn, configCollection);

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