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FieldsQuery.javaAPI DocApache Lucene 2.1.03218Wed Feb 14 10:45:42 GMT 2007org.apache.lucene.queryParser.surround.query

FieldsQuery

public class FieldsQuery extends SrndQuery
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.

Fields Summary
private SrndQuery
q
private ArrayList
fieldNames
private final char
fieldOp
private final String
OrOperatorName
Constructors Summary
public FieldsQuery(SrndQuery q, ArrayList fieldNames, char fieldOp)

 /* for expanded queries, not normally visible */
  
         
    this.q = q;
    this.fieldNames = fieldNames;
    this.fieldOp = fieldOp;
  
public FieldsQuery(SrndQuery q, String fieldName, char fieldOp)

    this.q = q;
    fieldNames = new ArrayList();
    fieldNames.add(fieldName);
    this.fieldOp = fieldOp;
  
Methods Summary
protected voidfieldNamesToString(java.lang.StringBuffer r)

    Iterator fni = getFieldNames().listIterator();
    while (fni.hasNext()) {
      r.append((String) fni.next());
      r.append(getFieldOperator());
    }
  
public java.util.ListgetFieldNames()

return fieldNames;
public chargetFieldOperator()

 return fieldOp;
public booleanisFieldsSubQueryAcceptable()

    return false;
  
public org.apache.lucene.search.QuerymakeLuceneQueryFieldNoBoost(java.lang.String fieldName, BasicQueryFactory qf)

    return makeLuceneQueryNoBoost(qf); /* use this.fieldNames instead of fieldName */
  
public org.apache.lucene.search.QuerymakeLuceneQueryNoBoost(BasicQueryFactory qf)

    if (fieldNames.size() == 1) { /* single field name: no new queries needed */
      return q.makeLuceneQueryFieldNoBoost((String) fieldNames.get(0), qf);
    } else { /* OR query over the fields */
      ArrayList queries = new ArrayList();
      Iterator fni = getFieldNames().listIterator();
      SrndQuery qc;
      while (fni.hasNext()) {
        qc = (SrndQuery) q.clone();
        queries.add( new FieldsQuery( qc, (String) fni.next(), fieldOp));
      }
      boolean infix = true;
      OrQuery oq = new OrQuery(queries,
                              true /* infix OR for field names */,
                              OrOperatorName);
      System.out.println(getClass().toString() + ", fields expanded: " + oq.toString()); /* needs testing */
      return oq.makeLuceneQueryField(null, qf);
    }
  
public java.lang.StringtoString()

    StringBuffer r = new StringBuffer();
    r.append("(");
    fieldNamesToString(r);
    r.append(q.toString());
    r.append(")");
    return r.toString();