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 * https://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 import org.apache.directory.api.i18n.I18n;
23
24 /**
25 * Creates a NOT filter
26 *
27 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
28 */
29 /* No qualifier*/final class UnaryFilter extends AbstractFilter
30 {
31 /** The NOT filter */
32 private Filter filter;
33
34
35 /**
36 * Creates a new instance of UnaryFilter.
37 */
38 private UnaryFilter()
39 {
40 }
41
42
43 /**
44 * Constructs a NOT filter
45 *
46 * @return The constructed NOT Filter
47 */
48 public static UnaryFilter not()
49 {
50 return new UnaryFilter();
51 }
52
53
54 /**
55 * Constructs a NOT filter with the associated inner Filter
56 *
57 * @param filter The inner Filter
58 * @return The constructed NOT Filter
59 */
60 public static UnaryFilter not( Filter filter )
61 {
62 UnaryFilter notFilter = not();
63 notFilter.filter = filter;
64
65 return notFilter;
66 }
67
68
69 /**
70 * {@inheritDoc}
71 */
72 @Override
73 public StringBuilder build( StringBuilder builder )
74 {
75 if ( filter == null )
76 {
77 throw new IllegalStateException( I18n.err( I18n.ERR_04167_FILTER_NOT_SET ) );
78 }
79
80 builder.append( "(" ).append( FilterOperator.NOT.operator() );
81 filter.build( builder );
82
83 return builder.append( ")" );
84 }
85 }