| /* |
| * 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.xdbm.search.cursor; |
| |
| |
| import org.apache.directory.api.ldap.model.constants.Loggers; |
| import org.apache.directory.api.ldap.model.cursor.Cursor; |
| import org.apache.directory.api.ldap.model.cursor.CursorException; |
| import org.apache.directory.api.ldap.model.exception.LdapException; |
| import org.apache.directory.server.core.partition.impl.btree.IndexCursorAdaptor; |
| import org.apache.directory.server.xdbm.AbstractIndexCursor; |
| import org.apache.directory.server.xdbm.IndexEntry; |
| import org.apache.directory.server.xdbm.Store; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * A Cursor over all entries in a partition which returns IndexEntries. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class AllEntriesCursor extends AbstractIndexCursor<String> |
| { |
| /** A dedicated log for cursors */ |
| private static final Logger LOG_CURSOR = LoggerFactory.getLogger( Loggers.CURSOR_LOG.getName() ); |
| |
| /** Speedup for logs */ |
| private static final boolean IS_DEBUG = LOG_CURSOR.isDebugEnabled(); |
| |
| /** The index entry we use to return entries one by one. */ |
| private IndexEntry<String, String> indexEntry = new IndexEntry<String, String>(); |
| |
| /** The cursor on the MsterTable index */ |
| private final Cursor<IndexEntry<String, String>> wrapped; |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| protected String getUnsupportedMessage() |
| { |
| return UNSUPPORTED_MSG; |
| } |
| |
| |
| /** |
| * Creates a new instance of AllEntriesCursor |
| * @param store |
| * @throws Exception |
| */ |
| public AllEntriesCursor( Store store ) throws Exception |
| { |
| if ( IS_DEBUG ) |
| { |
| LOG_CURSOR.debug( "Creating AllEntriesCursor {}", this ); |
| } |
| |
| // Uses the MasterTable |
| wrapped = new IndexCursorAdaptor( store.getMasterTable().cursor(), true ); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void after( IndexEntry<String, String> indexEntry ) throws LdapException, CursorException |
| { |
| checkNotClosed( "after()" ); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void afterLast() throws LdapException, CursorException |
| { |
| checkNotClosed( "afterLast()" ); |
| |
| wrapped.afterLast(); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public boolean available() |
| { |
| return wrapped.available(); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void before( IndexEntry<String, String> indexEntry ) throws LdapException, CursorException |
| { |
| checkNotClosed( "before()" ); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void beforeFirst() throws LdapException, CursorException |
| { |
| checkNotClosed( "beforeFirst()" ); |
| |
| wrapped.beforeFirst(); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public boolean first() throws LdapException, CursorException |
| { |
| checkNotClosed( "first()" ); |
| |
| return wrapped.first(); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public IndexEntry<String, String> get() throws CursorException |
| { |
| checkNotClosed( "get()" ); |
| |
| // Create the returned IndexEntry, copying what we get from the wrapped cursor |
| // As we are using the MasterTable, we have to use the key as the |
| // ID and value |
| IndexEntry<?, String> wrappedEntry = wrapped.get(); |
| indexEntry.setId( ( String ) wrappedEntry.getKey() ); |
| indexEntry.setKey( ( String ) wrappedEntry.getKey() ); |
| indexEntry.setEntry( null ); |
| |
| return indexEntry; |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public boolean last() throws LdapException, CursorException |
| { |
| checkNotClosed( "last()" ); |
| |
| return wrapped.last(); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public boolean next() throws LdapException, CursorException |
| { |
| checkNotClosed( "next()" ); |
| |
| return wrapped.next(); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public boolean previous() throws LdapException, CursorException |
| { |
| checkNotClosed( "previous()" ); |
| |
| return wrapped.previous(); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public void close() |
| { |
| if ( IS_DEBUG ) |
| { |
| LOG_CURSOR.debug( "Closing AllEntriesCursor {}", this ); |
| } |
| |
| wrapped.close(); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public void close( Exception cause ) |
| { |
| if ( IS_DEBUG ) |
| { |
| LOG_CURSOR.debug( "Closing AllEntriesCursor {}", this ); |
| } |
| |
| wrapped.close( cause ); |
| } |
| |
| |
| /** |
| * @see Object#toString() |
| */ |
| public String toString( String tabs ) |
| { |
| StringBuilder sb = new StringBuilder(); |
| |
| sb.append( tabs ).append( "AllEntriesCursor (" ); |
| |
| if ( available() ) |
| { |
| sb.append( "available)" ); |
| } |
| else |
| { |
| sb.append( "absent)" ); |
| } |
| |
| sb.append( " :\n" ); |
| |
| sb.append( wrapped.toString( tabs + " " ) ); |
| |
| return sb.toString(); |
| } |
| |
| |
| /** |
| * @see Object#toString() |
| */ |
| public String toString() |
| { |
| return toString( "" ); |
| } |
| } |