package org.cache2k.benchmark.util;
/*
* #%L
* Benchmarks: utilities
* %%
* Copyright (C) 2013 - 2017 headissue GmbH, Munich
* %%
* Licensed 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.
* #L%
*/
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.LineNumberReader;
import java.nio.charset.Charset;
/**
* Read in an access log trace from integer values.
*
* @author Jens Wilke; created: 2013-11-19
*/
public class IntegerTraceReader extends AccessPattern {
LineNumberReader reader;
int value;
/**
* Read in, default charset.
*/
public IntegerTraceReader(InputStream in, Charset cs) {
reader = new LineNumberReader(new InputStreamReader(in, cs));
}
@Override
public boolean isEternal() {
return false;
}
@Override
public boolean hasNext() throws Exception {
String s;
do {
s = reader.readLine();
if (s == null) {
return false;
}
} while (s.startsWith("#") || s.trim().length() == 0);
try {
value = Integer.parseInt(s);
} catch(NumberFormatException e) {
System.err.println("parse error line " + reader.getLineNumber() + ": " + s);
return hasNext();
}
return true;
}
@Override
public int next() throws IOException {
return value;
}
@Override
public void close() throws IOException {
reader.close();
}
}