edu.uci.jforestsx.input.RankingBinFileReader Maven / Gradle / Ivy
/**
* 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 edu.uci.jforestsx.input;
import java.io.InputStream;
/**
* @author Yasser Ganjisaffar
*/
public class RankingBinFileReader extends BinaryFileReader {
private int[] queryBoundaries;
private int numQueries;
private int maxDocsPerQuery;
public RankingBinFileReader(InputStream in) {
super(in);
}
public int[] getQueryBoundaries() {
return queryBoundaries;
}
public int getMaximumDocsPerQuery() {
return maxDocsPerQuery;
}
@Override
protected void readHeader() throws Exception {
super.readHeader();
numQueries = readInt();
queryBoundaries = new int[numQueries + 1];
}
@Override
public void read() throws Exception {
super.read();
for (int q = 0; q < numQueries + 1; q++) {
queryBoundaries[q] = readInt();
}
maxDocsPerQuery = 0;
for (int q = 0; q < numQueries; q++) {
int queryDocs = queryBoundaries[q + 1] - queryBoundaries[q];
if (queryDocs > maxDocsPerQuery) {
maxDocsPerQuery = queryDocs;
}
}
}
}