| /* |
| * 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.lucene.queryparser.surround.query; |
| import java.io.IOException; |
| |
| import org.apache.lucene.index.IndexReader; |
| import org.apache.lucene.index.Term; |
| import org.apache.lucene.search.Query; |
| |
| /** |
| * Base class for queries that expand to sets of simple terms. |
| */ |
| public abstract class SimpleTerm |
| extends SrndQuery |
| implements DistanceSubQuery, Comparable<SimpleTerm> |
| { |
| public SimpleTerm(boolean q) {quoted = q;} |
| |
| private boolean quoted; |
| boolean isQuoted() {return quoted;} |
| |
| public String getQuote() {return "\"";} |
| public String getFieldOperator() {return "/";} |
| |
| public abstract String toStringUnquoted(); |
| |
| /** @deprecated (March 2011) Not normally used, to be removed from Lucene 4.0. |
| * This class implementing Comparable is to be removed at the same time. |
| */ |
| @Override |
| @Deprecated |
| public int compareTo(SimpleTerm ost) { |
| /* for ordering terms and prefixes before using an index, not used */ |
| return this.toStringUnquoted().compareTo( ost.toStringUnquoted()); |
| } |
| |
| protected void suffixToString(StringBuilder r) {} /* override for prefix query */ |
| |
| @Override |
| public String toString() { |
| StringBuilder r = new StringBuilder(); |
| if (isQuoted()) { |
| r.append(getQuote()); |
| } |
| r.append(toStringUnquoted()); |
| if (isQuoted()) { |
| r.append(getQuote()); |
| } |
| suffixToString(r); |
| weightToString(r); |
| return r.toString(); |
| } |
| |
| public abstract void visitMatchingTerms( |
| IndexReader reader, |
| String fieldName, |
| MatchingTermVisitor mtv) throws IOException; |
| |
| /** |
| * Callback to visit each matching term during "rewrite" |
| * in {@link #visitMatchingTerm(Term)} |
| */ |
| public interface MatchingTermVisitor { |
| void visitMatchingTerm(Term t)throws IOException; |
| } |
| |
| @Override |
| public String distanceSubQueryNotAllowed() {return null;} |
| |
| @Override |
| public void addSpanQueries(final SpanNearClauseFactory sncf) throws IOException { |
| visitMatchingTerms( |
| sncf.getIndexReader(), |
| sncf.getFieldName(), |
| new MatchingTermVisitor() { |
| @Override |
| public void visitMatchingTerm(Term term) throws IOException { |
| sncf.addTermWeighted(term, getWeight()); |
| } |
| }); |
| } |
| |
| @Override |
| public Query makeLuceneQueryFieldNoBoost(final String fieldName, final BasicQueryFactory qf) { |
| return new SimpleTermRewriteQuery(this, fieldName, qf); |
| } |
| } |
| |
| |
| |