| /* |
| * 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.shared.ldap.codec.search; |
| |
| |
| import org.apache.directory.shared.asn1.codec.DecoderException; |
| import org.apache.directory.shared.asn1.codec.EncoderException; |
| |
| import java.nio.ByteBuffer; |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| |
| /** |
| * This Filter abstract class is used to store a set of filters used by |
| * OR/AND/NOT filters. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public abstract class ConnectorFilter extends Filter |
| { |
| // ~ Instance fields |
| // ---------------------------------------------------------------------------- |
| |
| /** The set of filters used by And/Or filters */ |
| protected List<Filter> filterSet; |
| |
| /** The filters length */ |
| protected int filtersLength; |
| |
| |
| // ~ Constructors |
| // ------------------------------------------------------------------------------- |
| |
| /** |
| * The constructor. We wont initialize the ArrayList as it may not be used. |
| */ |
| public ConnectorFilter( int tlvId ) |
| { |
| super( tlvId ); |
| } |
| |
| |
| /** |
| * The constructor. We wont initialize the ArrayList as it may not be used. |
| */ |
| public ConnectorFilter() |
| { |
| super(); |
| } |
| |
| |
| // ~ Methods |
| // ------------------------------------------------------------------------------------ |
| |
| /** |
| * Add a new Filter to the list. |
| * |
| * @param filter The filter to add |
| */ |
| public void addFilter( Filter filter ) throws DecoderException |
| { |
| |
| if ( filterSet == null ) |
| { |
| filterSet = new ArrayList<Filter>(); |
| } |
| |
| filterSet.add( filter ); |
| } |
| |
| |
| /** |
| * Get the list of filters stored in the composite filter |
| * |
| * @return And array of filters |
| */ |
| public List<Filter> getFilterSet() |
| { |
| return filterSet; |
| } |
| |
| |
| /** |
| * Compute the ConnectorFilter length Length(ConnectorFilter) = |
| * sum(filterSet.computeLength()) |
| */ |
| public int computeLength() |
| { |
| int connectorFilterLength = 0; |
| |
| if ( ( filterSet != null ) && ( filterSet.size() != 0 ) ) |
| { |
| Iterator filterIterator = filterSet.iterator(); |
| |
| while ( filterIterator.hasNext() ) |
| { |
| Filter filter = ( Filter ) filterIterator.next(); |
| |
| connectorFilterLength += filter.computeLength(); |
| } |
| } |
| |
| return connectorFilterLength; |
| } |
| |
| |
| /** |
| * Encode the ConnectorFilter message to a PDU. |
| * |
| * ConnectorFilter : |
| * filter.encode() ... filter.encode() |
| * |
| * @param buffer The buffer where to put the PDU |
| * @return The PDU. |
| */ |
| public ByteBuffer encode( ByteBuffer buffer ) throws EncoderException |
| { |
| if ( buffer == null ) |
| { |
| throw new EncoderException( "Cannot put a PDU in a null buffer !" ); |
| } |
| |
| // encode each filter |
| if ( ( filterSet != null ) && ( filterSet.size() != 0 ) ) |
| { |
| Iterator filterIterator = filterSet.iterator(); |
| |
| while ( filterIterator.hasNext() ) |
| { |
| Filter filter = ( Filter ) filterIterator.next(); |
| |
| filter.encode( buffer ); |
| } |
| } |
| |
| return buffer; |
| } |
| |
| |
| /** |
| * Return a string compliant with RFC 2254 representing a composite filter, |
| * one of AND, OR and NOT |
| * |
| * @return The composite filter string |
| */ |
| public String toString() |
| { |
| StringBuffer sb = new StringBuffer(); |
| |
| if ( ( filterSet != null ) && ( filterSet.size() != 0 ) ) |
| { |
| for ( Filter filter : filterSet ) |
| { |
| sb.append( '(' ).append( filter ).append( ')' ); |
| } |
| } |
| |
| return sb.toString(); |
| } |
| } |