1 package org.apache.lucene.benchmark.byTask.tasks;
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20 import java.lang.reflect.Constructor;
21 import java.util.StringTokenizer;
23 import org.apache.lucene.analysis.Analyzer;
24 import org.apache.lucene.analysis.shingle.ShingleAnalyzerWrapper;
25 import org.apache.lucene.benchmark.byTask.PerfRunData;
26 import org.apache.lucene.util.Version;
29 * Task to support benchmarking ShingleFilter / ShingleAnalyzerWrapper
32 * <li> <code>NewShingleAnalyzer</code> (constructs with all defaults)
33 * <li> <code>NewShingleAnalyzer(analyzer:o.a.l.analysis.StandardAnalyzer,maxShingleSize:2,outputUnigrams:true)</code>
37 public class NewShingleAnalyzerTask extends PerfTask {
39 private String analyzerClassName = "standard.StandardAnalyzer";
40 private int maxShingleSize = 2;
41 private boolean outputUnigrams = true;
43 public NewShingleAnalyzerTask(PerfRunData runData) {
47 private void setAnalyzer() throws Exception {
48 Class<? extends Analyzer> clazz = null;
49 Analyzer wrappedAnalyzer;
51 if (analyzerClassName == null || analyzerClassName.equals("")) {
53 = "org.apache.lucene.analysis.standard.StandardAnalyzer";
55 if (analyzerClassName.indexOf(".") == -1
56 || analyzerClassName.startsWith("standard.")) {
57 //there is no package name, assume o.a.l.analysis
58 analyzerClassName = "org.apache.lucene.analysis." + analyzerClassName;
60 clazz = Class.forName(analyzerClassName).asSubclass(Analyzer.class);
61 // first try to use a ctor with version parameter (needed for many new
62 // Analyzers that have no default one anymore)
63 Constructor<? extends Analyzer> ctor = clazz.getConstructor(Version.class);
64 wrappedAnalyzer = ctor.newInstance(Version.LUCENE_CURRENT);
65 } catch (NoSuchMethodException e) {
66 // otherwise use default ctor
67 wrappedAnalyzer = clazz.newInstance();
69 ShingleAnalyzerWrapper analyzer
70 = new ShingleAnalyzerWrapper(wrappedAnalyzer, maxShingleSize);
71 analyzer.setOutputUnigrams(outputUnigrams);
72 getRunData().setAnalyzer(analyzer);
76 public int doLogic() throws Exception {
80 ("Changed Analyzer to: ShingleAnalyzerWrapper, wrapping ShingleFilter over"
82 } catch (Exception e) {
83 throw new RuntimeException("Error creating Analyzer", e);
89 public void setParams(String params) {
90 super.setParams(params);
91 StringTokenizer st = new StringTokenizer(params, ",");
92 while (st.hasMoreTokens()) {
93 String param = st.nextToken();
94 StringTokenizer expr = new StringTokenizer(param, ":");
95 String key = expr.nextToken();
96 String value = expr.nextToken();
97 if (key.equalsIgnoreCase("analyzer")) {
98 analyzerClassName = value;
99 } else if (key.equalsIgnoreCase("outputUnigrams")) {
100 outputUnigrams = Boolean.parseBoolean(value);
101 } else if (key.equalsIgnoreCase("maxShingleSize")) {
102 maxShingleSize = (int)Double.parseDouble(value);
104 throw new RuntimeException("Unknown parameter " + param);
110 public boolean supportsParams() {