QueryWordsPhrase


1   /*******************************************************************************
2    * Copyright (c) 2000, 2006 IBM Corporation and others.
3    * All rights reserved. This program and the accompanying materials
4    * are made available under the terms of the Eclipse Public License v1.0
5    * which accompanies this distribution, and is available at
6    * http://www.eclipse.org/legal/epl-v10.html
7    *
8    * Contributors:
9    *     IBM Corporation - initial API and implementation
10   *******************************************************************************/
11  package org.eclipse.help.internal.search;
12  import java.util.ArrayList  ;
13  import java.util.Iterator  ;
14  import java.util.List  ;
15  
16  import org.apache.lucene.index.*;
17  import org.apache.lucene.search.*;
18  /**
19   * Represents a phrase (not quoted) token in user search query words It consists
20   * of several words created by an analyzer
21   */
22  public class QueryWordsPhrase extends QueryWordsToken {
23      private List   words;
24      public QueryWordsPhrase() {
25          super(QueryWordsToken.PHRASE, ""); //$NON-NLS-1$
26          words = new ArrayList  ();
27      }
28      public void addWord(String   word) {
29          words.add(word);
30          if (words.size() <= 1)
31              value = word;
32          else
33              value += " " + word; //$NON-NLS-1$
34      }
35      public List   getWords() {
36          return words;
37      }
38      /**
39       * Creates a lucene query for a field
40       */
41      public Query createLuceneQuery(String   field, float boost) {
42          PhraseQuery q = new PhraseQuery();
43          for (Iterator   it = getWords().iterator(); it.hasNext();) {
44              String   word = (String  ) it.next();
45              Term t = new Term(field, word);
46              q.add(t);
47              q.setBoost(boost);
48          }
49          return q;
50      }
51  }
52
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