Lucene example source code file (TestNumericRangeFilterBuilder.java)

This example Lucene source code file (TestNumericRangeFilterBuilder.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

age, document, document, dom, exception, filter, indexwriter, io, ioexception, numericrangefilter, numericrangefilter, numericrangefilterbuilder, numericrangefilterbuilder, parser, sax, string, string, suppresswarnings, xml

The Lucene TestNumericRangeFilterBuilder.java source code

package org.apache.lucene.xmlparser.builders;

/**
 * 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.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.apache.lucene.util.LuceneTestCase;

import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.search.Filter;
import org.apache.lucene.search.NumericRangeFilter;
import org.apache.lucene.store.Directory;
import org.apache.lucene.xmlparser.ParserException;
import org.w3c.dom.Document;
import org.xml.sax.SAXException;

public class TestNumericRangeFilterBuilder extends LuceneTestCase {

	public void testGetFilterHandleNumericParseErrorStrict() throws Exception {
		NumericRangeFilterBuilder filterBuilder = new NumericRangeFilterBuilder();
		filterBuilder.setStrictMode(true);

		String xml = "<NumericRangeFilter fieldName='AGE' type='int' lowerTerm='-1' upperTerm='NaN'/>";
		Document doc = getDocumentFromString(xml);
		try {
			filterBuilder.getFilter(doc.getDocumentElement());
		} catch (ParserException e) {
			return;
		}
		fail("Expected to throw " + ParserException.class);
	}

	public void testGetFilterHandleNumericParseError() throws Exception {
		NumericRangeFilterBuilder filterBuilder = new NumericRangeFilterBuilder();
		filterBuilder.setStrictMode(false);

		String xml = "<NumericRangeFilter fieldName='AGE' type='int' lowerTerm='-1' upperTerm='NaN'/>";
		Document doc = getDocumentFromString(xml);
		Filter filter = filterBuilder.getFilter(doc.getDocumentElement());
		Directory ramDir = newDirectory();
		IndexWriter writer = new IndexWriter(ramDir, newIndexWriterConfig(TEST_VERSION_CURRENT, null));
		writer.commit();
		try
		{
			IndexReader reader = IndexReader.open(ramDir, true);
			try
			{
				assertNull(filter.getDocIdSet(reader));
			}
			finally
			{
				reader.close();
			}
		}
		finally
		{
			writer.commit();
			writer.close();
			ramDir.close();
		}
	}

	public void testGetFilterInt() throws Exception {
		NumericRangeFilterBuilder filterBuilder = new NumericRangeFilterBuilder();
		filterBuilder.setStrictMode(true);

		String xml = "<NumericRangeFilter fieldName='AGE' type='int' lowerTerm='-1' upperTerm='10'/>";
		Document doc = getDocumentFromString(xml);
		Filter filter = filterBuilder.getFilter(doc.getDocumentElement());
		assertTrue(filter instanceof NumericRangeFilter<?>);
		@SuppressWarnings("unchecked")
		NumericRangeFilter<Integer> numRangeFilter = (NumericRangeFilter) filter;
		assertEquals(Integer.valueOf(-1), numRangeFilter.getMin());
		assertEquals(Integer.valueOf(10), numRangeFilter.getMax());
		assertEquals("AGE", numRangeFilter.getField());
		assertTrue(numRangeFilter.includesMin());
		assertTrue(numRangeFilter.includesMax());

		String xml2 = "<NumericRangeFilter fieldName='AGE' type='int' lowerTerm='-1' upperTerm='10' includeUpper='false'/>";
		Document doc2 = getDocumentFromString(xml2);
		Filter filter2 = filterBuilder.getFilter(doc2.getDocumentElement());
		assertTrue(filter2 instanceof NumericRangeFilter<?>);
		@SuppressWarnings("unchecked")
		NumericRangeFilter<Integer> numRangeFilter2 = (NumericRangeFilter) filter2;
		assertEquals(Integer.valueOf(-1), numRangeFilter2.getMin());
		assertEquals(Integer.valueOf(10), numRangeFilter2.getMax());
		assertEquals("AGE", numRangeFilter2.getField());
		assertTrue(numRangeFilter2.includesMin());
		assertFalse(numRangeFilter2.includesMax());
	}

	public void testGetFilterLong() throws Exception {
		NumericRangeFilterBuilder filterBuilder = new NumericRangeFilterBuilder();
		filterBuilder.setStrictMode(true);

		String xml = "<NumericRangeFilter fieldName='AGE' type='LoNg' lowerTerm='-2321' upperTerm='60000000'/>";
		Document doc = getDocumentFromString(xml);
		Filter filter = filterBuilder.getFilter(doc.getDocumentElement());
		assertTrue(filter instanceof NumericRangeFilter<?>);
		@SuppressWarnings("unchecked")
		NumericRangeFilter<Long> numRangeFilter = (NumericRangeFilter) filter;
		assertEquals(Long.valueOf(-2321L), numRangeFilter.getMin());
		assertEquals(Long.valueOf(60000000L), numRangeFilter.getMax());
		assertEquals("AGE", numRangeFilter.getField());
		assertTrue(numRangeFilter.includesMin());
		assertTrue(numRangeFilter.includesMax());

		String xml2 = "<NumericRangeFilter fieldName='AGE' type='LoNg' lowerTerm='-2321' upperTerm='60000000' includeUpper='false'/>";
		Document doc2 = getDocumentFromString(xml2);
		Filter filter2 = filterBuilder.getFilter(doc2.getDocumentElement());
		assertTrue(filter2 instanceof NumericRangeFilter<?>);
		@SuppressWarnings("unchecked")
		NumericRangeFilter<Long> numRangeFilter2 = (NumericRangeFilter) filter2;
		assertEquals(Long.valueOf(-2321L), numRangeFilter2.getMin());
		assertEquals(Long.valueOf(60000000L), numRangeFilter2.getMax());
		assertEquals("AGE", numRangeFilter2.getField());
		assertTrue(numRangeFilter2.includesMin());
		assertFalse(numRangeFilter2.includesMax());
	}

	public void testGetFilterDouble() throws Exception {
		NumericRangeFilterBuilder filterBuilder = new NumericRangeFilterBuilder();
		filterBuilder.setStrictMode(true);

		String xml = "<NumericRangeFilter fieldName='AGE' type='doubLe' lowerTerm='-23.21' upperTerm='60000.00023'/>";
		Document doc = getDocumentFromString(xml);

		Filter filter = filterBuilder.getFilter(doc.getDocumentElement());
		assertTrue(filter instanceof NumericRangeFilter<?>);
		@SuppressWarnings("unchecked")
		NumericRangeFilter<Double> numRangeFilter = (NumericRangeFilter) filter;
		assertEquals(Double.valueOf(-23.21d), numRangeFilter.getMin());
		assertEquals(Double.valueOf(60000.00023d), numRangeFilter.getMax());
		assertEquals("AGE", numRangeFilter.getField());
		assertTrue(numRangeFilter.includesMin());
		assertTrue(numRangeFilter.includesMax());

		String xml2 = "<NumericRangeFilter fieldName='AGE' type='doubLe' lowerTerm='-23.21' upperTerm='60000.00023' includeUpper='false'/>";
		Document doc2 = getDocumentFromString(xml2);
		Filter filter2 = filterBuilder.getFilter(doc2.getDocumentElement());
		assertTrue(filter2 instanceof NumericRangeFilter<?>);
		@SuppressWarnings("unchecked")
		NumericRangeFilter<Double> numRangeFilter2 = (NumericRangeFilter) filter2;
		assertEquals(Double.valueOf(-23.21d), numRangeFilter2.getMin());
		assertEquals(Double.valueOf(60000.00023d), numRangeFilter2.getMax());
		assertEquals("AGE", numRangeFilter2.getField());
		assertTrue(numRangeFilter2.includesMin());
		assertFalse(numRangeFilter2.includesMax());
	}

	public void testGetFilterFloat() throws Exception {
		NumericRangeFilterBuilder filterBuilder = new NumericRangeFilterBuilder();
		filterBuilder.setStrictMode(true);

		String xml = "<NumericRangeFilter fieldName='AGE' type='FLOAT' lowerTerm='-2.321432' upperTerm='32432.23'/>";
		Document doc = getDocumentFromString(xml);

		Filter filter = filterBuilder.getFilter(doc.getDocumentElement());
		assertTrue(filter instanceof NumericRangeFilter<?>);
		@SuppressWarnings("unchecked")
		NumericRangeFilter<Float> numRangeFilter = (NumericRangeFilter) filter;
		assertEquals(Float.valueOf(-2.321432f), numRangeFilter.getMin());
		assertEquals(Float.valueOf(32432.23f), numRangeFilter.getMax());
		assertEquals("AGE", numRangeFilter.getField());
		assertTrue(numRangeFilter.includesMin());
		assertTrue(numRangeFilter.includesMax());

		String xml2 = "<NumericRangeFilter fieldName='AGE' type='FLOAT' lowerTerm='-2.321432' upperTerm='32432.23' includeUpper='false' precisionStep='2' />";
		Document doc2 = getDocumentFromString(xml2);

		Filter filter2 = filterBuilder.getFilter(doc2.getDocumentElement());
		assertTrue(filter2 instanceof NumericRangeFilter<?>);
		@SuppressWarnings("unchecked")
		NumericRangeFilter<Float> numRangeFilter2 = (NumericRangeFilter) filter2;
		assertEquals(Float.valueOf(-2.321432f), numRangeFilter2.getMin());
		assertEquals(Float.valueOf(32432.23f), numRangeFilter2.getMax());
		assertEquals("AGE", numRangeFilter2.getField());
		assertTrue(numRangeFilter2.includesMin());
		assertFalse(numRangeFilter2.includesMax());
	}

	private static Document getDocumentFromString(String str)
			throws SAXException, IOException, ParserConfigurationException {
		InputStream is = new ByteArrayInputStream(str.getBytes());
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		factory.setNamespaceAware(true);
		DocumentBuilder builder = factory.newDocumentBuilder();
		Document doc = builder.parse(is);
		is.close();
		return doc;
	}

}