io.virtdata.libbasics.shared.from_long.to_collection.HashedLineToStringStringMap Maven / Gradle / Ivy
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With inspiration from other libraries
/*
*
* 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.libbasics.shared.from_long.to_collection;
import io.virtdata.annotations.Categories;
import io.virtdata.annotations.Category;
import io.virtdata.annotations.ThreadSafeMapper;
import io.virtdata.libbasics.shared.from_long.to_int.HashRange;
import io.virtdata.libbasics.shared.from_long.to_string.HashedLineToString;
import java.util.HashMap;
import java.util.Map;
import java.util.function.LongFunction;
/**
* Create a String-String map from the specified file, ranging in size
* from 0 to the specified maximum.
*/
@ThreadSafeMapper
@Categories({Category.collections})
public class HashedLineToStringStringMap implements LongFunction> {
private final HashedLineToString lineDataMapper;
private final HashRange sizeRange;
public HashedLineToStringStringMap(String paramFile, int maxSize) {
this.sizeRange = new HashRange(0, maxSize-1);
this.lineDataMapper = new HashedLineToString(paramFile);
}
@Override
public Map apply(long input) {
int mapSize = sizeRange.applyAsInt(input);
Map map = new HashMap<>();
for (int idx=0;idx