+++ /dev/null
-package org.apache.lucene.search;
-
-/**
- * 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.
- */
-
-/** A clause in a BooleanQuery. */
-public class BooleanClause implements java.io.Serializable {
-
- /** Specifies how clauses are to occur in matching documents. */
- public static enum Occur {
-
- /** Use this operator for clauses that <i>must</i> appear in the matching documents. */
- MUST { @Override public String toString() { return "+"; } },
-
- /** Use this operator for clauses that <i>should</i> appear in the
- * matching documents. For a BooleanQuery with no <code>MUST</code>
- * clauses one or more <code>SHOULD</code> clauses must match a document
- * for the BooleanQuery to match.
- * @see BooleanQuery#setMinimumNumberShouldMatch
- */
- SHOULD { @Override public String toString() { return ""; } },
-
- /** Use this operator for clauses that <i>must not</i> appear in the matching documents.
- * Note that it is not possible to search for queries that only consist
- * of a <code>MUST_NOT</code> clause. */
- MUST_NOT { @Override public String toString() { return "-"; } };
-
- }
-
- /** The query whose matching documents are combined by the boolean query.
- */
- private Query query;
-
- private Occur occur;
-
-
- /** Constructs a BooleanClause.
- */
- public BooleanClause(Query query, Occur occur) {
- this.query = query;
- this.occur = occur;
-
- }
-
- public Occur getOccur() {
- return occur;
- }
-
- public void setOccur(Occur occur) {
- this.occur = occur;
-
- }
-
- public Query getQuery() {
- return query;
- }
-
- public void setQuery(Query query) {
- this.query = query;
- }
-
- public boolean isProhibited() {
- return Occur.MUST_NOT == occur;
- }
-
- public boolean isRequired() {
- return Occur.MUST == occur;
- }
-
-
-
- /** Returns true if <code>o</code> is equal to this. */
- @Override
- public boolean equals(Object o) {
- if (o == null || !(o instanceof BooleanClause))
- return false;
- BooleanClause other = (BooleanClause)o;
- return this.query.equals(other.query)
- && this.occur == other.occur;
- }
-
- /** Returns a hash code value for this object.*/
- @Override
- public int hashCode() {
- return query.hashCode() ^ (Occur.MUST == occur?1:0) ^ (Occur.MUST_NOT == occur?2:0);
- }
-
-
- @Override
- public String toString() {
- return occur.toString() + query.toString();
- }
-}