package org.apache.lucene.analysis.ja.util;
/*
* 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.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.LineNumberReader;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CodingErrorAction;
public class ConnectionCostsBuilder {
private ConnectionCostsBuilder() {
}
public static ConnectionCostsWriter build(String filename) throws IOException {
FileInputStream inputStream = new FileInputStream(filename);
Charset cs = Charset.forName("US-ASCII");
CharsetDecoder decoder = cs.newDecoder()
.onMalformedInput(CodingErrorAction.REPORT)
.onUnmappableCharacter(CodingErrorAction.REPORT);
InputStreamReader streamReader = new InputStreamReader(inputStream, decoder);
LineNumberReader lineReader = new LineNumberReader(streamReader);
String line = lineReader.readLine();
String[] dimensions = line.split("\\s+");
assert dimensions.length == 2;
int forwardSize = Integer.parseInt(dimensions[0]);
int backwardSize = Integer.parseInt(dimensions[1]);
assert forwardSize > 0 && backwardSize > 0;
ConnectionCostsWriter costs = new ConnectionCostsWriter(forwardSize, backwardSize);
while ((line = lineReader.readLine()) != null) {
String[] fields = line.split("\\s+");
assert fields.length == 3;
int forwardId = Integer.parseInt(fields[0]);
int backwardId = Integer.parseInt(fields[1]);
int cost = Integer.parseInt(fields[2]);
costs.add(forwardId, backwardId, cost);
}
return costs;
}
}