--- /dev/null
+package org.apache.lucene.queryParser.surround.query;
+/**
+ * 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.
+ */
+
+import java.util.List;
+import java.util.ArrayList;
+import java.util.Iterator;
+
+import org.apache.lucene.search.Query;
+
+public abstract class ComposedQuery extends SrndQuery {
+
+ public ComposedQuery(List qs, boolean operatorInfix, String opName) {
+ recompose(qs);
+ this.operatorInfix = operatorInfix;
+ this.opName = opName;
+ }
+
+ protected void recompose(List queries) {
+ if (queries.size() < 2) throw new AssertionError("Too few subqueries");
+ this.queries = queries;
+ }
+
+ private String opName;
+ public String getOperatorName() {return opName;}
+
+ private List queries;
+
+ public Iterator getSubQueriesIterator() {return queries.listIterator();}
+
+ public int getNrSubQueries() {return queries.size();}
+
+ public SrndQuery getSubQuery(int qn) {return (SrndQuery) queries.get(qn);}
+
+ private boolean operatorInfix;
+ public boolean isOperatorInfix() { return operatorInfix; } /* else prefix operator */
+
+ public List<Query> makeLuceneSubQueriesField(String fn, BasicQueryFactory qf) {
+ List<Query> luceneSubQueries = new ArrayList<Query>();
+ Iterator sqi = getSubQueriesIterator();
+ while (sqi.hasNext()) {
+ luceneSubQueries.add( ((SrndQuery) sqi.next()).makeLuceneQueryField(fn, qf));
+ }
+ return luceneSubQueries;
+ }
+
+ @Override
+ public String toString() {
+ StringBuilder r = new StringBuilder();
+ if (isOperatorInfix()) {
+ infixToString(r);
+ } else {
+ prefixToString(r);
+ }
+ weightToString(r);
+ return r.toString();
+ }
+
+ /* Override for different spacing */
+ protected String getPrefixSeparator() { return ", ";}
+ protected String getBracketOpen() { return "(";}
+ protected String getBracketClose() { return ")";}
+
+ protected void infixToString(StringBuilder r) {
+ /* Brackets are possibly redundant in the result. */
+ Iterator sqi = getSubQueriesIterator();
+ r.append(getBracketOpen());
+ if (sqi.hasNext()) {
+ r.append(sqi.next().toString());
+ while (sqi.hasNext()) {
+ r.append(" ");
+ r.append(getOperatorName()); /* infix operator */
+ r.append(" ");
+ r.append(sqi.next().toString());
+ }
+ }
+ r.append(getBracketClose());
+ }
+
+ protected void prefixToString(StringBuilder r) {
+ Iterator sqi = getSubQueriesIterator();
+ r.append(getOperatorName()); /* prefix operator */
+ r.append(getBracketOpen());
+ if (sqi.hasNext()) {
+ r.append(sqi.next().toString());
+ while (sqi.hasNext()) {
+ r.append(getPrefixSeparator());
+ r.append(sqi.next().toString());
+ }
+ }
+ r.append(getBracketClose());
+ }
+
+
+ @Override
+ public boolean isFieldsSubQueryAcceptable() {
+ /* at least one subquery should be acceptable */
+ Iterator sqi = getSubQueriesIterator();
+ while (sqi.hasNext()) {
+ if (((SrndQuery) sqi.next()).isFieldsSubQueryAcceptable()) {
+ return true;
+ }
+ }
+ return false;
+ }
+}
+