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Lucene example source code file (TestDocValues.java)

This example Lucene source code file (TestDocValues.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

docvalues, docvaluestestimpl, docvaluestestimpl, float, lucenetestcase, nan, nan, override, override, string, test, test, testdocvalues

The Lucene TestDocValues.java source code

package org.apache.lucene.search.function;

/**
 * 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 org.apache.lucene.util.LuceneTestCase;
import org.junit.Test;

/**
 * DocValues TestCase  
 */
public class TestDocValues extends LuceneTestCase {

  @Test
  public void testGetMinValue() {
    float[] innerArray = new float[] { 1.0f, 2.0f, -1.0f, 100.0f };
    DocValuesTestImpl docValues = new DocValuesTestImpl(innerArray);
    assertEquals("-1.0f is the min value in the source array", -1.0f, docValues
        .getMinValue(), 0);

    // test with without values - NaN
    innerArray = new float[] {};
    docValues = new DocValuesTestImpl(innerArray);
    assertTrue("max is NaN - no values in inner array", Float.isNaN(docValues
        .getMinValue()));
  }
  @Test
  public void testGetMaxValue() {
    float[] innerArray = new float[] { 1.0f, 2.0f, -1.0f, 10.0f };
    DocValuesTestImpl docValues = new DocValuesTestImpl(innerArray);
    assertEquals("10.0f is the max value in the source array", 10.0f, docValues
        .getMaxValue(), 0);

    innerArray = new float[] { -3.0f, -1.0f, -100.0f };
    docValues = new DocValuesTestImpl(innerArray);
    assertEquals("-1.0f is the max value in the source array", -1.0f, docValues
        .getMaxValue(), 0);

    innerArray = new float[] { -3.0f, -1.0f, 100.0f, Float.MAX_VALUE,
        Float.MAX_VALUE - 1 };
    docValues = new DocValuesTestImpl(innerArray);
    assertEquals(Float.MAX_VALUE + " is the max value in the source array",
        Float.MAX_VALUE, docValues.getMaxValue(), 0);

    // test with without values - NaN
    innerArray = new float[] {};
    docValues = new DocValuesTestImpl(innerArray);
    assertTrue("max is NaN - no values in inner array", Float.isNaN(docValues
        .getMaxValue()));
  }

  @Test
  public void testGetAverageValue() {
    float[] innerArray = new float[] { 1.0f, 1.0f, 1.0f, 1.0f };
    DocValuesTestImpl docValues = new DocValuesTestImpl(innerArray);
    assertEquals("the average is 1.0f", 1.0f, docValues.getAverageValue(), 0);

    innerArray = new float[] { 1.0f, 2.0f, 3.0f, 4.0f, 5.0f, 6.0f };
    docValues = new DocValuesTestImpl(innerArray);
    assertEquals("the average is 3.5f", 3.5f, docValues.getAverageValue(), 0);

    // test with negative values
    innerArray = new float[] { -1.0f, 2.0f };
    docValues = new DocValuesTestImpl(innerArray);
    assertEquals("the average is 0.5f", 0.5f, docValues.getAverageValue(), 0);

    // test with without values - NaN
    innerArray = new float[] {};
    docValues = new DocValuesTestImpl(innerArray);
    assertTrue("the average is NaN - no values in inner array", Float
        .isNaN(docValues.getAverageValue()));
  }

  static class DocValuesTestImpl extends DocValues {
    float[] innerArray;

    DocValuesTestImpl(float[] innerArray) {
      this.innerArray = innerArray;
    }

    /**
     * @see org.apache.lucene.search.function.DocValues#floatVal(int)
     */
    @Override
    public float floatVal(int doc) {
      return innerArray[doc];
    }

    /**
     * @see org.apache.lucene.search.function.DocValues#toString(int)
     */
    @Override
    public String toString(int doc) {
      return Integer.toString(doc);
    }

  }

}

Other Lucene examples (source code examples)

Here is a short list of links related to this Lucene TestDocValues.java source code file:

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