| /* |
| * 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. |
| */ |
| |
| package org.apache.lucene.analysis.miscellaneous; |
| |
| import java.io.IOException; |
| import java.io.StringReader; |
| import org.apache.lucene.analysis.BaseTokenStreamTestCase; |
| import org.apache.lucene.analysis.CannedTokenStream; |
| import org.apache.lucene.analysis.MockTokenizer; |
| import org.apache.lucene.analysis.Token; |
| import org.apache.lucene.analysis.TokenStream; |
| import org.apache.lucene.analysis.tokenattributes.FlagsAttribute; |
| import org.apache.lucene.analysis.tokenattributes.PayloadAttribute; |
| import org.apache.lucene.util.AttributeFactory; |
| |
| public class TestConcatenatingTokenStream extends BaseTokenStreamTestCase { |
| |
| public void testBasic() throws IOException { |
| |
| AttributeFactory factory = newAttributeFactory(); |
| |
| final MockTokenizer first = new MockTokenizer(factory, MockTokenizer.WHITESPACE, false); |
| first.setReader(new StringReader("first words ")); |
| final MockTokenizer second = new MockTokenizer(factory, MockTokenizer.WHITESPACE, false); |
| second.setReader(new StringReader("second words")); |
| final MockTokenizer third = new MockTokenizer(factory, MockTokenizer.WHITESPACE, false); |
| third.setReader(new StringReader(" third words")); |
| |
| TokenStream ts = new ConcatenatingTokenStream(first, second, new EmptyTokenStream(), third); |
| assertTokenStreamContents( |
| ts, |
| new String[] {"first", "words", "second", "words", "third", "words"}, |
| new int[] {0, 6, 12, 19, 25, 31}, |
| new int[] {5, 11, 18, 24, 30, 36}); |
| |
| // test re-use |
| first.setReader(new StringReader("first words ")); |
| second.setReader(new StringReader("second words")); |
| third.setReader(new StringReader(" third words")); |
| assertTokenStreamContents( |
| ts, |
| new String[] {"first", "words", "second", "words", "third", "words"}, |
| new int[] {0, 6, 12, 19, 25, 31}, |
| new int[] {5, 11, 18, 24, 30, 36}, |
| new int[] {1, 1, 1, 1, 1, 1}); |
| } |
| |
| public void testOffsetGaps() throws IOException { |
| CannedTokenStream cts1 = |
| new CannedTokenStream(2, 10, new Token("a", 0, 1), new Token("b", 2, 3)); |
| CannedTokenStream cts2 = |
| new CannedTokenStream(2, 10, new Token("c", 0, 1), new Token("d", 2, 3)); |
| |
| TokenStream ts = new ConcatenatingTokenStream(cts1, cts2); |
| assertTokenStreamContents( |
| ts, |
| new String[] {"a", "b", "c", "d"}, |
| new int[] {0, 2, 10, 12}, |
| new int[] {1, 3, 11, 13}, |
| null, |
| new int[] {1, 1, 3, 1}, |
| null, |
| 20, |
| 2, |
| null, |
| false, |
| null); |
| } |
| |
| public void testInconsistentAttributes() throws IOException { |
| |
| AttributeFactory factory = newAttributeFactory(); |
| |
| final MockTokenizer first = new MockTokenizer(factory, MockTokenizer.WHITESPACE, false); |
| first.setReader(new StringReader("first words ")); |
| first.addAttribute(PayloadAttribute.class); |
| final MockTokenizer second = new MockTokenizer(factory, MockTokenizer.WHITESPACE, false); |
| second.setReader(new StringReader("second words")); |
| second.addAttribute(FlagsAttribute.class); |
| |
| TokenStream ts = new ConcatenatingTokenStream(first, second); |
| assertTrue(ts.hasAttribute(FlagsAttribute.class)); |
| assertTrue(ts.hasAttribute(PayloadAttribute.class)); |
| |
| assertTokenStreamContents( |
| ts, |
| new String[] {"first", "words", "second", "words"}, |
| new int[] { |
| 0, 6, 12, 19, |
| }, |
| new int[] { |
| 5, 11, 18, 24, |
| }); |
| } |
| |
| public void testInconsistentAttributeFactories() throws IOException { |
| |
| final MockTokenizer first = |
| new MockTokenizer( |
| AttributeFactory.DEFAULT_ATTRIBUTE_FACTORY, MockTokenizer.WHITESPACE, true); |
| final MockTokenizer second = |
| new MockTokenizer( |
| TokenStream.DEFAULT_TOKEN_ATTRIBUTE_FACTORY, MockTokenizer.WHITESPACE, true); |
| |
| expectThrows(IllegalArgumentException.class, () -> new ConcatenatingTokenStream(first, second)); |
| } |
| } |