package org.apache.lucene.analysis;
/*
* 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.BytesRef;
import org.apache.lucene.util.NumericUtils;
import org.apache.lucene.analysis.tokenattributes.TermToBytesRefAttribute;
import org.apache.lucene.analysis.tokenattributes.TypeAttribute;
import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
import org.apache.lucene.analysis.tokenattributes.CharTermAttributeImpl;
public class TestNumericTokenStream extends BaseTokenStreamTestCase {
static final long lvalue = 4573245871874382L;
static final int ivalue = 123456;
public void testLongStream() throws Exception {
final NumericTokenStream stream=new NumericTokenStream().setLongValue(lvalue);
// use getAttribute to test if attributes really exist, if not an IAE will be throwed
final TermToBytesRefAttribute bytesAtt = stream.getAttribute(TermToBytesRefAttribute.class);
final TypeAttribute typeAtt = stream.getAttribute(TypeAttribute.class);
final NumericTokenStream.NumericTermAttribute numericAtt = stream.getAttribute(NumericTokenStream.NumericTermAttribute.class);
final BytesRef bytes = bytesAtt.getBytesRef();
stream.reset();
assertEquals(64, numericAtt.getValueSize());
for (int shift=0; shift<64; shift+=NumericUtils.PRECISION_STEP_DEFAULT) {
assertTrue("New token is available", stream.incrementToken());
assertEquals("Shift value wrong", shift, numericAtt.getShift());
final int hash = bytesAtt.fillBytesRef();
assertEquals("Hash incorrect", bytes.hashCode(), hash);
assertEquals("Term is incorrectly encoded", lvalue & ~((1L << shift) - 1L), NumericUtils.prefixCodedToLong(bytes));
assertEquals("Term raw value is incorrectly encoded", lvalue & ~((1L << shift) - 1L), numericAtt.getRawValue());
assertEquals("Type incorrect", (shift == 0) ? NumericTokenStream.TOKEN_TYPE_FULL_PREC : NumericTokenStream.TOKEN_TYPE_LOWER_PREC, typeAtt.type());
}
assertFalse("More tokens available", stream.incrementToken());
stream.end();
stream.close();
}
public void testIntStream() throws Exception {
final NumericTokenStream stream=new NumericTokenStream().setIntValue(ivalue);
// use getAttribute to test if attributes really exist, if not an IAE will be throwed
final TermToBytesRefAttribute bytesAtt = stream.getAttribute(TermToBytesRefAttribute.class);
final TypeAttribute typeAtt = stream.getAttribute(TypeAttribute.class);
final NumericTokenStream.NumericTermAttribute numericAtt = stream.getAttribute(NumericTokenStream.NumericTermAttribute.class);
final BytesRef bytes = bytesAtt.getBytesRef();
stream.reset();
assertEquals(32, numericAtt.getValueSize());
for (int shift=0; shift<32; shift+=NumericUtils.PRECISION_STEP_DEFAULT) {
assertTrue("New token is available", stream.incrementToken());
assertEquals("Shift value wrong", shift, numericAtt.getShift());
final int hash = bytesAtt.fillBytesRef();
assertEquals("Hash incorrect", bytes.hashCode(), hash);
assertEquals("Term is incorrectly encoded", ivalue & ~((1 << shift) - 1), NumericUtils.prefixCodedToInt(bytes));
assertEquals("Term raw value is incorrectly encoded", ((long) ivalue) & ~((1L << shift) - 1L), numericAtt.getRawValue());
assertEquals("Type incorrect", (shift == 0) ? NumericTokenStream.TOKEN_TYPE_FULL_PREC : NumericTokenStream.TOKEN_TYPE_LOWER_PREC, typeAtt.type());
}
assertFalse("More tokens available", stream.incrementToken());
stream.end();
stream.close();
}
public void testNotInitialized() throws Exception {
final NumericTokenStream stream=new NumericTokenStream();
try {
stream.reset();
fail("reset() should not succeed.");
} catch (IllegalStateException e) {
// pass
}
try {
stream.incrementToken();
fail("incrementToken() should not succeed.");
} catch (IllegalStateException e) {
// pass
}
}
public static interface TestAttribute extends CharTermAttribute {}
public static class TestAttributeImpl extends CharTermAttributeImpl implements TestAttribute {}
public void testCTA() throws Exception {
final NumericTokenStream stream=new NumericTokenStream();
try {
stream.addAttribute(CharTermAttribute.class);
fail("Succeeded to add CharTermAttribute.");
} catch (IllegalArgumentException iae) {
assertTrue(iae.getMessage().startsWith("NumericTokenStream does not support"));
}
try {
stream.addAttribute(TestAttribute.class);
fail("Succeeded to add TestAttribute.");
} catch (IllegalArgumentException iae) {
assertTrue(iae.getMessage().startsWith("NumericTokenStream does not support"));
}
}
}