| /* |
| * 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; |
| |
| import java.io.IOException; |
| import java.io.StringReader; |
| |
| import org.apache.lucene.analysis.tokenattributes.CharTermAttribute; |
| import org.apache.lucene.analysis.tokenattributes.PositionIncrementAttribute; |
| |
| public class TestGraphTokenFilter extends BaseTokenStreamTestCase { |
| |
| static class TestFilter extends GraphTokenFilter { |
| |
| public TestFilter(TokenStream input) { |
| super(input); |
| } |
| |
| @Override |
| public final boolean incrementToken() throws IOException { |
| return incrementBaseToken(); |
| } |
| } |
| |
| public void testGraphTokenStream() throws IOException { |
| |
| TestGraphTokenizers.GraphTokenizer tok = new TestGraphTokenizers.GraphTokenizer(); |
| GraphTokenFilter graph = new TestFilter(tok); |
| |
| CharTermAttribute termAtt = graph.addAttribute(CharTermAttribute.class); |
| PositionIncrementAttribute posIncAtt = graph.addAttribute(PositionIncrementAttribute.class); |
| |
| tok.setReader(new StringReader("a b/c d e/f:3 g/h i j k")); |
| tok.reset(); |
| |
| assertFalse(graph.incrementGraph()); |
| assertEquals(0, graph.cachedTokenCount()); |
| |
| assertTrue(graph.incrementBaseToken()); |
| assertEquals("a", termAtt.toString()); |
| assertEquals(1, posIncAtt.getPositionIncrement()); |
| assertTrue(graph.incrementGraphToken()); |
| assertEquals("b", termAtt.toString()); |
| assertTrue(graph.incrementGraphToken()); |
| assertEquals("d", termAtt.toString()); |
| assertTrue(graph.incrementGraph()); |
| assertEquals("a", termAtt.toString()); |
| assertTrue(graph.incrementGraphToken()); |
| assertEquals("c", termAtt.toString()); |
| assertTrue(graph.incrementGraphToken()); |
| assertEquals("d", termAtt.toString()); |
| assertFalse(graph.incrementGraph()); |
| assertEquals(5, graph.cachedTokenCount()); |
| |
| assertTrue(graph.incrementBaseToken()); |
| assertEquals("b", termAtt.toString()); |
| assertTrue(graph.incrementGraphToken()); |
| assertEquals("d", termAtt.toString()); |
| assertTrue(graph.incrementGraphToken()); |
| assertEquals("e", termAtt.toString()); |
| assertTrue(graph.incrementGraph()); |
| assertEquals("b", termAtt.toString()); |
| assertTrue(graph.incrementGraphToken()); |
| assertEquals("d", termAtt.toString()); |
| assertTrue(graph.incrementGraphToken()); |
| assertEquals("f", termAtt.toString()); |
| assertFalse(graph.incrementGraph()); |
| assertEquals(6, graph.cachedTokenCount()); |
| |
| assertTrue(graph.incrementBaseToken()); |
| assertEquals("c", termAtt.toString()); |
| assertEquals(0, posIncAtt.getPositionIncrement()); |
| assertTrue(graph.incrementGraphToken()); |
| assertEquals("d", termAtt.toString()); |
| assertFalse(graph.incrementGraph()); |
| assertEquals(6, graph.cachedTokenCount()); |
| |
| assertTrue(graph.incrementBaseToken()); |
| assertEquals("d", termAtt.toString()); |
| assertTrue(graph.incrementGraphToken()); |
| assertEquals("e", termAtt.toString()); |
| assertTrue(graph.incrementGraphToken()); |
| assertEquals("g", termAtt.toString()); |
| assertTrue(graph.incrementGraph()); |
| assertEquals("d", termAtt.toString()); |
| assertTrue(graph.incrementGraphToken()); |
| assertEquals("e", termAtt.toString()); |
| assertTrue(graph.incrementGraphToken()); |
| assertEquals("h", termAtt.toString()); |
| assertTrue(graph.incrementGraph()); |
| assertEquals("d", termAtt.toString()); |
| assertTrue(graph.incrementGraphToken()); |
| assertEquals("f", termAtt.toString()); |
| assertTrue(graph.incrementGraphToken()); |
| assertEquals("j", termAtt.toString()); |
| assertFalse(graph.incrementGraph()); |
| assertEquals(8, graph.cachedTokenCount()); |
| |
| //tok.setReader(new StringReader("a b/c d e/f:3 g/h i j k")); |
| |
| assertTrue(graph.incrementBaseToken()); |
| assertEquals("e", termAtt.toString()); |
| assertTrue(graph.incrementGraphToken()); |
| assertEquals("g", termAtt.toString()); |
| assertTrue(graph.incrementGraphToken()); |
| assertEquals("i", termAtt.toString()); |
| assertTrue(graph.incrementGraphToken()); |
| assertEquals("j", termAtt.toString()); |
| assertTrue(graph.incrementGraph()); |
| assertEquals("e", termAtt.toString()); |
| assertTrue(graph.incrementGraphToken()); |
| assertEquals("h", termAtt.toString()); |
| assertFalse(graph.incrementGraph()); |
| assertEquals(8, graph.cachedTokenCount()); |
| |
| assertTrue(graph.incrementBaseToken()); |
| assertEquals("f", termAtt.toString()); |
| assertTrue(graph.incrementGraphToken()); |
| assertEquals("j", termAtt.toString()); |
| assertTrue(graph.incrementGraphToken()); |
| assertEquals("k", termAtt.toString()); |
| assertFalse(graph.incrementGraphToken()); |
| assertFalse(graph.incrementGraph()); |
| assertEquals(8, graph.cachedTokenCount()); |
| |
| assertTrue(graph.incrementBaseToken()); |
| assertEquals("g", termAtt.toString()); |
| assertTrue(graph.incrementGraphToken()); |
| assertEquals("i", termAtt.toString()); |
| assertFalse(graph.incrementGraph()); |
| assertEquals(8, graph.cachedTokenCount()); |
| |
| assertTrue(graph.incrementBaseToken()); |
| assertEquals("h", termAtt.toString()); |
| assertFalse(graph.incrementGraph()); |
| assertEquals(8, graph.cachedTokenCount()); |
| |
| assertTrue(graph.incrementBaseToken()); |
| assertTrue(graph.incrementBaseToken()); |
| assertTrue(graph.incrementBaseToken()); |
| assertEquals("k", termAtt.toString()); |
| assertFalse(graph.incrementGraphToken()); |
| assertEquals(0, graph.getTrailingPositions()); |
| assertFalse(graph.incrementGraph()); |
| assertFalse(graph.incrementBaseToken()); |
| assertEquals(8, graph.cachedTokenCount()); |
| |
| } |
| |
| public void testTrailingPositions() throws IOException { |
| |
| // a/b:2 c _ |
| CannedTokenStream cts = new CannedTokenStream(1, 5, |
| new Token("a", 0, 1), |
| new Token("b", 0, 0, 1, 2), |
| new Token("c", 1, 2, 3) |
| ); |
| |
| GraphTokenFilter gts = new TestFilter(cts); |
| assertFalse(gts.incrementGraph()); |
| assertTrue(gts.incrementBaseToken()); |
| assertTrue(gts.incrementGraphToken()); |
| assertFalse(gts.incrementGraphToken()); |
| assertEquals(1, gts.getTrailingPositions()); |
| assertFalse(gts.incrementGraph()); |
| assertTrue(gts.incrementBaseToken()); |
| assertFalse(gts.incrementGraphToken()); |
| assertEquals(1, gts.getTrailingPositions()); |
| assertFalse(gts.incrementGraph()); |
| } |
| |
| public void testMaximumGraphCacheSize() throws IOException { |
| |
| Token[] tokens = new Token[GraphTokenFilter.MAX_TOKEN_CACHE_SIZE + 5]; |
| for (int i = 0; i < GraphTokenFilter.MAX_TOKEN_CACHE_SIZE + 5; i++) { |
| tokens[i] = new Token("a", 1, i * 2, i * 2 + 1); |
| } |
| |
| GraphTokenFilter gts = new TestFilter(new CannedTokenStream(tokens)); |
| Exception e = expectThrows(IllegalStateException.class, () -> { |
| gts.reset(); |
| gts.incrementBaseToken(); |
| while (true) { |
| gts.incrementGraphToken(); |
| } |
| }); |
| assertEquals("Too many cached tokens (> 100)", e.getMessage()); |
| |
| gts.reset(); |
| // after reset, the cache should be cleared and so we can read ahead once more |
| gts.incrementBaseToken(); |
| gts.incrementGraphToken(); |
| |
| } |
| |
| public void testGraphPathCountLimits() { |
| |
| Token[] tokens = new Token[50]; |
| tokens[0] = new Token("term", 1, 0, 1); |
| tokens[1] = new Token("term1", 1, 2, 3); |
| for (int i = 2; i < 50; i++) { |
| tokens[i] = new Token("term" + i, i % 2, 2, 3); |
| } |
| |
| Exception e = expectThrows(IllegalStateException.class, () -> { |
| GraphTokenFilter graph = new TestFilter(new CannedTokenStream(tokens)); |
| graph.reset(); |
| graph.incrementBaseToken(); |
| for (int i = 0; i < 10; i++) { |
| graph.incrementGraphToken(); |
| } |
| while (graph.incrementGraph()) { |
| for (int i = 0; i < 10; i++) { |
| graph.incrementGraphToken(); |
| } |
| } |
| }); |
| assertEquals("Too many graph paths (> 1000)", e.getMessage()); |
| } |
| |
| } |