1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, 13 * software distributed under the License is distributed on an 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 * KIND, either express or implied. See the License for the 16 * specific language governing permissions and limitations 17 * under the License. 18 * 19 */ 20 package org.apache.directory.ldap.client.api.search; 21 22 23 /** 24 * Creates a NOT filter 25 * 26 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 27 */ 28 /* No qualifier*/final class UnaryFilter extends AbstractFilter 29 { 30 /** The NOT filter */ 31 private Filter filter; 32 33 34 /** 35 * Creates a new instance of UnaryFilter. 36 */ 37 private UnaryFilter() 38 { 39 } 40 41 42 /** 43 * Constructs a NOT filter 44 * 45 * @return The constructed NOT Filter 46 */ 47 public static UnaryFilter not() 48 { 49 return new UnaryFilter(); 50 } 51 52 53 /** 54 * Constructs a NOT filter with the associated inner Filter 55 * 56 * @param filter The inner Filter 57 * @return The constructed NOT Filter 58 */ 59 public static UnaryFilter not( Filter filter ) 60 { 61 UnaryFilter notFilter = not(); 62 notFilter.filter = filter; 63 64 return notFilter; 65 } 66 67 68 /** 69 * {@inheritDoc} 70 */ 71 @Override 72 public StringBuilder build( StringBuilder builder ) 73 { 74 if ( filter == null ) 75 { 76 throw new IllegalStateException( "filter not set" ); 77 } 78 79 builder.append( "(" ).append( FilterOperator.NOT.operator() ); 80 filter.build( builder ); 81 82 return builder.append( ")" ); 83 } 84 }