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Lucene example source code file (TestMultiFieldQueryParserWrapper.java)

This example Lucene source code file (TestMultiFieldQueryParserWrapper.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Lucene tags/keywords

analyzerreturningnull, and, exception, illegalargumentexception, io, multifieldqueryparserwrapper, multifieldqueryparserwrapper, parseexception, query, query, standardanalyzer, standardanalyzer, string, string, to, util

The Lucene TestMultiFieldQueryParserWrapper.java source code

package org.apache.lucene.queryParser.standard;

/**
 * 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.io.Reader;
import java.util.HashMap;
import java.util.Map;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.queryParser.ParseException;
import org.apache.lucene.queryParser.standard.MultiFieldQueryParserWrapper;
import org.apache.lucene.queryParser.standard.QueryParserWrapper;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.BooleanClause.Occur;
import org.apache.lucene.store.Directory;
import org.apache.lucene.util.LuceneTestCase;

/**
 * Tests multi field query parsing using the
 * {@link MultiFieldQueryParserWrapper}.
 * 
 * @deprecated this tests test the deprecated MultiFieldQueryParserWrapper, so
 *             when the latter is gone, so should this test.
 */
@Deprecated
public class TestMultiFieldQueryParserWrapper extends LuceneTestCase {

  /**
   * test stop words parsing for both the non static form, and for the
   * corresponding static form (qtxt, fields[]).
   */
  public void testStopwordsParsing() throws Exception {
    assertStopQueryEquals("one", "b:one t:one");
    assertStopQueryEquals("one stop", "b:one t:one");
    assertStopQueryEquals("one (stop)", "b:one t:one");
    assertStopQueryEquals("one ((stop))", "b:one t:one");
    assertStopQueryEquals("stop", "");
    assertStopQueryEquals("(stop)", "");
    assertStopQueryEquals("((stop))", "");
  }

  // verify parsing of query using a stopping analyzer
  private void assertStopQueryEquals(String qtxt, String expectedRes)
      throws Exception {
    String[] fields = { "b", "t" };
    Occur occur[] = { Occur.SHOULD, Occur.SHOULD };
    TestQueryParserWrapper.QPTestAnalyzer a = new TestQueryParserWrapper.QPTestAnalyzer();
    MultiFieldQueryParserWrapper mfqp = new MultiFieldQueryParserWrapper(
        fields, a);

    Query q = mfqp.parse(qtxt);
    assertEquals(expectedRes, q.toString());

    q = MultiFieldQueryParserWrapper.parse(qtxt, fields, occur, a);
    assertEquals(expectedRes, q.toString());
  }

  public void testSimple() throws Exception {
    String[] fields = { "b", "t" };
    MultiFieldQueryParserWrapper mfqp = new MultiFieldQueryParserWrapper(
        fields, new StandardAnalyzer(TEST_VERSION_CURRENT));

    Query q = mfqp.parse("one");
    assertEquals("b:one t:one", q.toString());

    q = mfqp.parse("one two");
    assertEquals("(b:one t:one) (b:two t:two)", q.toString());

    q = mfqp.parse("+one +two");
    assertEquals("+(b:one t:one) +(b:two t:two)", q.toString());

    q = mfqp.parse("+one -two -three");
    assertEquals("+(b:one t:one) -(b:two t:two) -(b:three t:three)", q
        .toString());

    q = mfqp.parse("one^2 two");
    assertEquals("((b:one t:one)^2.0) (b:two t:two)", q.toString());

    q = mfqp.parse("one~ two");
    assertEquals("(b:one~0.5 t:one~0.5) (b:two t:two)", q.toString());

    q = mfqp.parse("one~0.8 two^2");
    assertEquals("(b:one~0.8 t:one~0.8) ((b:two t:two)^2.0)", q.toString());

    q = mfqp.parse("one* two*");
    assertEquals("(b:one* t:one*) (b:two* t:two*)", q.toString());

    q = mfqp.parse("[a TO c] two");
    assertEquals("(b:[a TO c] t:[a TO c]) (b:two t:two)", q.toString());

    q = mfqp.parse("w?ldcard");
    assertEquals("b:w?ldcard t:w?ldcard", q.toString());

    q = mfqp.parse("\"foo bar\"");
    assertEquals("b:\"foo bar\" t:\"foo bar\"", q.toString());

    q = mfqp.parse("\"aa bb cc\" \"dd ee\"");
    assertEquals("(b:\"aa bb cc\" t:\"aa bb cc\") (b:\"dd ee\" t:\"dd ee\")", q
        .toString());

    q = mfqp.parse("\"foo bar\"~4");
    assertEquals("b:\"foo bar\"~4 t:\"foo bar\"~4", q.toString());

    // LUCENE-1213: MultiFieldQueryParserWrapper was ignoring slop when phrase
    // had a field.
    q = mfqp.parse("b:\"foo bar\"~4");
    assertEquals("b:\"foo bar\"~4", q.toString());

    // make sure that terms which have a field are not touched:
    q = mfqp.parse("one f:two");
    assertEquals("(b:one t:one) f:two", q.toString());

    // AND mode:
    mfqp.setDefaultOperator(QueryParserWrapper.AND_OPERATOR);
    q = mfqp.parse("one two");
    assertEquals("+(b:one t:one) +(b:two t:two)", q.toString());
    q = mfqp.parse("\"aa bb cc\" \"dd ee\"");
    assertEquals("+(b:\"aa bb cc\" t:\"aa bb cc\") +(b:\"dd ee\" t:\"dd ee\")",
        q.toString());

  }

  public void testBoostsSimple() throws Exception {
    Map<String,Float> boosts = new HashMap();
    boosts.put("b", Float.valueOf(5));
    boosts.put("t", Float.valueOf(10));
    String[] fields = { "b", "t" };
    MultiFieldQueryParserWrapper mfqp = new MultiFieldQueryParserWrapper(
        fields, new StandardAnalyzer(TEST_VERSION_CURRENT), boosts);

    // Check for simple
    Query q = mfqp.parse("one");
    assertEquals("b:one^5.0 t:one^10.0", q.toString());

    // Check for AND
    q = mfqp.parse("one AND two");
    assertEquals("+(b:one^5.0 t:one^10.0) +(b:two^5.0 t:two^10.0)", q
        .toString());

    // Check for OR
    q = mfqp.parse("one OR two");
    assertEquals("(b:one^5.0 t:one^10.0) (b:two^5.0 t:two^10.0)", q.toString());

    // Check for AND and a field
    q = mfqp.parse("one AND two AND foo:test");
    assertEquals("+(b:one^5.0 t:one^10.0) +(b:two^5.0 t:two^10.0) +foo:test", q
        .toString());

    q = mfqp.parse("one^3 AND two^4");
    assertEquals("+((b:one^5.0 t:one^10.0)^3.0) +((b:two^5.0 t:two^10.0)^4.0)",
        q.toString());
  }

  public void testStaticMethod1() throws ParseException {
    String[] fields = { "b", "t" };
    String[] queries = { "one", "two" };
    Query q = MultiFieldQueryParserWrapper.parse(queries, fields,
        new StandardAnalyzer(TEST_VERSION_CURRENT));
    assertEquals("b:one t:two", q.toString());

    String[] queries2 = { "+one", "+two" };
    q = MultiFieldQueryParserWrapper.parse(queries2, fields,
        new StandardAnalyzer(TEST_VERSION_CURRENT));
    assertEquals("(+b:one) (+t:two)", q.toString());

    String[] queries3 = { "one", "+two" };
    q = MultiFieldQueryParserWrapper.parse(queries3, fields,
        new StandardAnalyzer(TEST_VERSION_CURRENT));
    assertEquals("b:one (+t:two)", q.toString());

    String[] queries4 = { "one +more", "+two" };
    q = MultiFieldQueryParserWrapper.parse(queries4, fields,
        new StandardAnalyzer(TEST_VERSION_CURRENT));
    assertEquals("(b:one +b:more) (+t:two)", q.toString());

    String[] queries5 = { "blah" };
    try {
      q = MultiFieldQueryParserWrapper.parse(queries5, fields,
          new StandardAnalyzer(TEST_VERSION_CURRENT));
      fail();
    } catch (IllegalArgumentException e) {
      // expected exception, array length differs
    }

    // check also with stop words for this static form (qtxts[], fields[]).
    TestQueryParserWrapper.QPTestAnalyzer stopA = new TestQueryParserWrapper.QPTestAnalyzer();

    String[] queries6 = { "((+stop))", "+((stop))" };
    q = MultiFieldQueryParserWrapper.parse(queries6, fields, stopA);
    assertEquals("", q.toString());

    String[] queries7 = { "one ((+stop)) +more", "+((stop)) +two" };
    q = MultiFieldQueryParserWrapper.parse(queries7, fields, stopA);
    assertEquals("(b:one +b:more) (+t:two)", q.toString());

  }

  public void testStaticMethod2() throws ParseException {
    String[] fields = { "b", "t" };
    BooleanClause.Occur[] flags = { BooleanClause.Occur.MUST,
        BooleanClause.Occur.MUST_NOT };
    Query q = MultiFieldQueryParserWrapper.parse("one", fields, flags,
        new StandardAnalyzer(TEST_VERSION_CURRENT));
    assertEquals("+b:one -t:one", q.toString());

    q = MultiFieldQueryParserWrapper.parse("one two", fields, flags,
        new StandardAnalyzer(TEST_VERSION_CURRENT));
    assertEquals("+(b:one b:two) -(t:one t:two)", q.toString());

    try {
      BooleanClause.Occur[] flags2 = { BooleanClause.Occur.MUST };
      q = MultiFieldQueryParserWrapper.parse("blah", fields, flags2,
          new StandardAnalyzer(TEST_VERSION_CURRENT));
      fail();
    } catch (IllegalArgumentException e) {
      // expected exception, array length differs
    }
  }

  public void testStaticMethod2Old() throws ParseException {
    String[] fields = { "b", "t" };
    // int[] flags = {MultiFieldQueryParserWrapper.REQUIRED_FIELD,
    // MultiFieldQueryParserWrapper.PROHIBITED_FIELD};
    BooleanClause.Occur[] flags = { BooleanClause.Occur.MUST,
        BooleanClause.Occur.MUST_NOT };

    Query q = MultiFieldQueryParserWrapper.parse("one", fields, flags,
        new StandardAnalyzer(TEST_VERSION_CURRENT));// , fields, flags, new StandardAnalyzer());
    assertEquals("+b:one -t:one", q.toString());

    q = MultiFieldQueryParserWrapper.parse("one two", fields, flags,
        new StandardAnalyzer(TEST_VERSION_CURRENT));
    assertEquals("+(b:one b:two) -(t:one t:two)", q.toString());

    try {
      BooleanClause.Occur[] flags2 = { BooleanClause.Occur.MUST };
      q = MultiFieldQueryParserWrapper.parse("blah", fields, flags2,
          new StandardAnalyzer(TEST_VERSION_CURRENT));
      fail();
    } catch (IllegalArgumentException e) {
      // expected exception, array length differs
    }
  }

  public void testStaticMethod3() throws ParseException {
    String[] queries = { "one", "two", "three" };
    String[] fields = { "f1", "f2", "f3" };
    BooleanClause.Occur[] flags = { BooleanClause.Occur.MUST,
        BooleanClause.Occur.MUST_NOT, BooleanClause.Occur.SHOULD };
    Query q = MultiFieldQueryParserWrapper.parse(queries, fields, flags,
        new StandardAnalyzer(TEST_VERSION_CURRENT));
    assertEquals("+f1:one -f2:two f3:three", q.toString());

    try {
      BooleanClause.Occur[] flags2 = { BooleanClause.Occur.MUST };
      q = MultiFieldQueryParserWrapper.parse(queries, fields, flags2,
          new StandardAnalyzer(TEST_VERSION_CURRENT));
      fail();
    } catch (IllegalArgumentException e) {
      // expected exception, array length differs
    }
  }

  public void testStaticMethod3Old() throws ParseException {
    String[] queries = { "one", "two" };
    String[] fields = { "b", "t" };
    BooleanClause.Occur[] flags = { BooleanClause.Occur.MUST,
        BooleanClause.Occur.MUST_NOT };
    Query q = MultiFieldQueryParserWrapper.parse(queries, fields, flags,
        new StandardAnalyzer(TEST_VERSION_CURRENT));
    assertEquals("+b:one -t:two", q.toString());

    try {
      BooleanClause.Occur[] flags2 = { BooleanClause.Occur.MUST };
      q = MultiFieldQueryParserWrapper.parse(queries, fields, flags2,
          new StandardAnalyzer(TEST_VERSION_CURRENT));
      fail();
    } catch (IllegalArgumentException e) {
      // expected exception, array length differs
    }
  }

  public void testAnalyzerReturningNull() throws ParseException {
    String[] fields = new String[] { "f1", "f2", "f3" };
    MultiFieldQueryParserWrapper parser = new MultiFieldQueryParserWrapper(
        fields, new AnalyzerReturningNull());
    Query q = parser.parse("bla AND blo");
    assertEquals("+(f2:bla f3:bla) +(f2:blo f3:blo)", q.toString());
    // the following queries are not affected as their terms are not analyzed
    // anyway:
    q = parser.parse("bla*");
    assertEquals("f1:bla* f2:bla* f3:bla*", q.toString());
    q = parser.parse("bla~");
    assertEquals("f1:bla~0.5 f2:bla~0.5 f3:bla~0.5", q.toString());
    q = parser.parse("[a TO c]");
    assertEquals("f1:[a TO c] f2:[a TO c] f3:[a TO c]", q.toString());
  }

  public void testStopWordSearching() throws Exception {
    Analyzer analyzer = new StandardAnalyzer(TEST_VERSION_CURRENT);
    Directory ramDir = newDirectory();
    IndexWriter iw = new IndexWriter(ramDir, analyzer, true,
        IndexWriter.MaxFieldLength.LIMITED);
    Document doc = new Document();
    doc.add(newField("body", "blah the footest blah", Field.Store.NO,
        Field.Index.ANALYZED));
    iw.addDocument(doc);
    iw.close();

    MultiFieldQueryParserWrapper mfqp = new MultiFieldQueryParserWrapper(
        new String[] { "body" }, analyzer);
    mfqp.setDefaultOperator(QueryParserWrapper.Operator.AND);
    Query q = mfqp.parse("the footest");
    IndexSearcher is = new IndexSearcher(ramDir, true);
    ScoreDoc[] hits = is.search(q, null, 1000).scoreDocs;
    assertEquals(1, hits.length);
    is.close();
    ramDir.close();
  }

  /**
   * Return empty tokens for field "f1".
   */
  private static class AnalyzerReturningNull extends Analyzer {
    StandardAnalyzer stdAnalyzer = new StandardAnalyzer(TEST_VERSION_CURRENT);

    public AnalyzerReturningNull() {
    }

    @Override
    public TokenStream tokenStream(String fieldName, Reader reader) {
      if ("f1".equals(fieldName)) {
        return new EmptyTokenStream();
      } else {
        return stdAnalyzer.tokenStream(fieldName, reader);
      }
    }

    private static class EmptyTokenStream extends TokenStream {
      @Override
      public boolean incrementToken() {
        return false;
      }
    }
  }

}

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