| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| package org.apache.directory.server.core.shared; |
| |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.NoSuchElementException; |
| |
| import org.apache.directory.api.ldap.model.cursor.AbstractCursor; |
| import org.apache.directory.api.ldap.model.cursor.CursorException; |
| import org.apache.directory.api.ldap.model.cursor.InvalidCursorPositionException; |
| import org.apache.directory.api.ldap.model.entry.Entry; |
| import org.apache.directory.api.ldap.model.exception.LdapException; |
| import org.apache.directory.mavibot.btree.BTree; |
| import org.apache.directory.mavibot.btree.RecordManager; |
| import org.apache.directory.mavibot.btree.Tuple; |
| import org.apache.directory.mavibot.btree.TupleCursor; |
| import org.apache.directory.mavibot.btree.exception.KeyNotFoundException; |
| import org.apache.directory.server.core.api.filtering.EntryFilter; |
| import org.apache.directory.server.core.api.filtering.EntryFilteringCursor; |
| import org.apache.directory.server.core.api.interceptor.context.SearchOperationContext; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * TODO SortedEntryCursor. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class SortedEntryCursor extends AbstractCursor<Entry> implements EntryFilteringCursor |
| { |
| |
| private static final Logger LOG = LoggerFactory.getLogger( SortedEntryCursor.class ); |
| |
| private TupleCursor<Entry, String> wrapped; |
| |
| private Tuple<Entry, String> tuple; |
| |
| private RecordManager recMan; |
| |
| private File dataFile; |
| |
| public SortedEntryCursor( BTree<Entry,String> btree, RecordManager recMan, File dataFile ) throws IOException, KeyNotFoundException |
| { |
| this.recMan = recMan; |
| this.dataFile = dataFile; |
| wrapped = btree.browse(); |
| } |
| |
| |
| @Override |
| public boolean available() |
| { |
| return ( tuple != null ); |
| } |
| |
| |
| @Override |
| public void before( Entry element ) throws LdapException, CursorException |
| { |
| throw new UnsupportedOperationException(); |
| } |
| |
| |
| @Override |
| public void after( Entry element ) throws LdapException, CursorException |
| { |
| throw new UnsupportedOperationException(); |
| } |
| |
| |
| @Override |
| public void beforeFirst() throws LdapException, CursorException |
| { |
| try |
| { |
| tuple = null; |
| wrapped.beforeFirst(); |
| } |
| catch ( IOException e ) |
| { |
| throw new CursorException( e ); |
| } |
| } |
| |
| |
| @Override |
| public void afterLast() throws LdapException, CursorException |
| { |
| try |
| { |
| tuple = null; |
| wrapped.afterLast(); |
| } |
| catch ( IOException e ) |
| { |
| throw new CursorException( e ); |
| } |
| |
| } |
| |
| |
| @Override |
| public boolean first() throws LdapException, CursorException |
| { |
| try |
| { |
| wrapped.beforeFirst(); |
| return next(); |
| } |
| catch ( IOException e ) |
| { |
| throw new CursorException( e ); |
| } |
| |
| } |
| |
| |
| @Override |
| public boolean last() throws LdapException, CursorException |
| { |
| try |
| { |
| wrapped.afterLast(); |
| return previous(); |
| } |
| catch ( IOException e ) |
| { |
| throw new CursorException( e ); |
| } |
| |
| } |
| |
| |
| @Override |
| public boolean previous() throws LdapException, CursorException |
| { |
| try |
| { |
| tuple = wrapped.prev(); |
| return true; |
| } |
| catch ( IOException e ) |
| { |
| throw new CursorException( e ); |
| } |
| catch ( NoSuchElementException e ) |
| { |
| // ignore this is due to the call wrapped.prev() |
| // instead of doing a check like if(wrapped.hasPrev()) |
| } |
| |
| tuple = null; |
| return false; |
| } |
| |
| |
| @Override |
| public boolean next() throws LdapException, CursorException |
| { |
| try |
| { |
| tuple = wrapped.next(); |
| return true; |
| } |
| catch ( IOException e ) |
| { |
| throw new CursorException( e ); |
| } |
| catch ( NoSuchElementException e ) |
| { |
| // ignore, this is due to the call wrapped.prev() |
| // instead of doing a check like if(wrapped.hasNext()) |
| } |
| |
| tuple = null; |
| return false; |
| } |
| |
| |
| @Override |
| public Entry get() throws CursorException |
| { |
| if ( tuple == null ) |
| { |
| throw new InvalidCursorPositionException(); |
| } |
| |
| return tuple.getKey(); |
| } |
| |
| |
| @Override |
| public void close() |
| { |
| wrapped.close(); |
| deleteFile(); |
| super.close(); |
| } |
| |
| |
| @Override |
| public void close( Exception cause ) |
| { |
| wrapped.close(); |
| deleteFile(); |
| super.close( cause ); |
| } |
| |
| |
| @Override |
| public boolean addEntryFilter( EntryFilter filter ) |
| { |
| return false; |
| } |
| |
| |
| @Override |
| public List<EntryFilter> getEntryFilters() |
| { |
| return null; |
| } |
| |
| |
| @Override |
| public SearchOperationContext getOperationContext() |
| { |
| return null; |
| } |
| |
| private void deleteFile() |
| { |
| if( recMan == null ) |
| { |
| return; |
| } |
| |
| try |
| { |
| recMan.close(); |
| dataFile.delete(); |
| } |
| catch( IOException e ) |
| { |
| LOG.warn( "Failed to delete the sorted entry data file {}", dataFile, e ); |
| } |
| } |
| } |