io.virtdata.functional.ModuloLineToString Maven / Gradle / Ivy
/*
*
* Copyright 2015 Jonathan Shook
*
* 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.
*
*/
package io.virtdata.functional;
import io.virtdata.util.ResourceFinder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.ArrayList;
import java.util.List;
import java.util.function.LongFunction;
public class ModuloLineToString implements LongFunction {
private final static Logger logger = LoggerFactory.getLogger(ModuloLineToString.class);
private List lines = new ArrayList<>();
private String filename;
public ModuloLineToString(String filename) {
this.filename = filename;
this.lines = ResourceFinder.readDataFileLines(filename);
}
@Override
public String apply(long input) {
int itemIdx = (int) (input % lines.size()) % Integer.MAX_VALUE;
String item = lines.get(itemIdx);
return item;
}
public String toString() {
return getClass().getSimpleName() + ":" + filename;
}
}