package org.apache.lucene.benchmark.byTask.tasks;
/*
* 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.util.StringTokenizer;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.shingle.ShingleAnalyzerWrapper;
import org.apache.lucene.analysis.shingle.ShingleFilter;
import org.apache.lucene.benchmark.byTask.PerfRunData;
/**
* Task to support benchmarking ShingleFilter / ShingleAnalyzerWrapper
* <p>
* <ul>
* <li> <code>NewShingleAnalyzer</code> (constructs with all defaults)
* <li> <code>NewShingleAnalyzer(analyzer:o.a.l.analysis.StandardAnalyzer,maxShingleSize:2,outputUnigrams:true)</code>
* </ul>
* </p>
*/
public class NewShingleAnalyzerTask extends PerfTask {
private String analyzerClassName = "standard.StandardAnalyzer";
private int maxShingleSize = 2;
private boolean outputUnigrams = true;
public NewShingleAnalyzerTask(PerfRunData runData) {
super(runData);
}
private void setAnalyzer() throws Exception {
Analyzer wrappedAnalyzer = null;
if (null == analyzerClassName || 0 == analyzerClassName.length()) {
analyzerClassName = "org.apache.lucene.analysis.standard.StandardAnalyzer";
}
if (-1 == analyzerClassName.indexOf(".")) {
String coreClassName = "org.apache.lucene.analysis.core." + analyzerClassName;
try {
// If there is no package, first attempt to instantiate a core analyzer
wrappedAnalyzer = NewAnalyzerTask.createAnalyzer(coreClassName);
analyzerClassName = coreClassName;
} catch (ClassNotFoundException e) {
// If this is not a core analyzer, try the base analysis package
analyzerClassName = "org.apache.lucene.analysis." + analyzerClassName;
wrappedAnalyzer = NewAnalyzerTask.createAnalyzer(analyzerClassName);
}
} else {
if (analyzerClassName.startsWith("standard.")) {
analyzerClassName = "org.apache.lucene.analysis." + analyzerClassName;
}
wrappedAnalyzer = NewAnalyzerTask.createAnalyzer(analyzerClassName);
}
ShingleAnalyzerWrapper analyzer = new ShingleAnalyzerWrapper(
wrappedAnalyzer,
ShingleFilter.DEFAULT_MIN_SHINGLE_SIZE,
maxShingleSize,
ShingleFilter.TOKEN_SEPARATOR,
outputUnigrams,
false);
getRunData().setAnalyzer(analyzer);
}
@Override
public int doLogic() throws Exception {
try {
setAnalyzer();
System.out.println
("Changed Analyzer to: ShingleAnalyzerWrapper, wrapping ShingleFilter over "
+ analyzerClassName);
} catch (Exception e) {
throw new RuntimeException("Error creating Analyzer", e);
}
return 1;
}
@Override
public void setParams(String params) {
super.setParams(params);
StringTokenizer st = new StringTokenizer(params, ",");
while (st.hasMoreTokens()) {
String param = st.nextToken();
StringTokenizer expr = new StringTokenizer(param, ":");
String key = expr.nextToken();
String value = expr.nextToken();
if (key.equalsIgnoreCase("analyzer")) {
analyzerClassName = value;
} else if (key.equalsIgnoreCase("outputUnigrams")) {
outputUnigrams = Boolean.parseBoolean(value);
} else if (key.equalsIgnoreCase("maxShingleSize")) {
maxShingleSize = (int)Double.parseDouble(value);
} else {
throw new RuntimeException("Unknown parameter " + param);
}
}
}
@Override
public boolean supportsParams() {
return true;
}
}