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 package org.apache.maven.search.api.request;
20
21 import static java.util.Objects.requireNonNull;
22
23 /**
24 * Boolean query.
25 */
26 public abstract class BooleanQuery extends Query {
27 private final Query left;
28
29 private final Query right;
30
31 protected BooleanQuery(Query left, String op, Query right) {
32 super(op);
33 this.left = requireNonNull(left);
34 this.right = requireNonNull(right);
35 }
36
37 /**
38 * Returns left term of this boolean query, never {@code null}.
39 */
40 public Query getLeft() {
41 return left;
42 }
43
44 /**
45 * Returns right term of this boolean query, never {@code null}.
46 */
47 public Query getRight() {
48 return right;
49 }
50
51 @Override
52 public String toString() {
53 return getLeft() + " " + getValue() + " " + getRight();
54 }
55
56 public static final class And extends BooleanQuery {
57 private And(Query left, Query right) {
58 super(left, "AND", right);
59 }
60 }
61
62 /**
63 * Creates Logical AND query (requires presence of all queries) out of passed in queries (at least 2 or more
64 * should be given).
65 */
66 public static BooleanQuery and(Query left, Query... rights) {
67 if (rights.length == 0) {
68 throw new IllegalArgumentException("one or more on right needed");
69 }
70 BooleanQuery result = null;
71 for (Query right : rights) {
72 result = new And(result == null ? left : result, right);
73 }
74 return result;
75 }
76 }