tech.tablesaw.columns.numbers.NumberPredicates Maven / Gradle / Ivy
/*
* 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 tech.tablesaw.columns.numbers;
import java.util.function.DoublePredicate;
/**
* Support for built-in predicates on double column
*
* TODO(lwhite): Ensure each returns false when handling missing values
*/
public interface NumberPredicates {
DoublePredicate isZero = i -> i == 0.0;
DoublePredicate isNegative = i -> i < 0;
DoublePredicate isPositive = i -> i > 0;
DoublePredicate isNonNegative = i -> i >= 0;
static DoublePredicate isGreaterThan(double valueToCompareAgainst) {
return valueToTest -> valueToTest > valueToCompareAgainst;
}
static DoublePredicate isBetweenExclusive(double rangeStart, double rangeEnd) {
return valueToTest -> valueToTest > rangeStart && valueToTest < rangeEnd;
};
static DoublePredicate isBetweenInclusive(double rangeStart, double rangeEnd) {
return valueToTest -> valueToTest >= rangeStart && valueToTest <= rangeEnd;
};
static DoublePredicate isGreaterThanOrEqualTo(double valueToCompareAgainst) {
return valueToTest -> valueToTest >= valueToCompareAgainst;
}
static DoublePredicate isLessThan(double valueToCompareAgainst) {
return valueToTest -> valueToTest < valueToCompareAgainst;
}
static DoublePredicate isLessThanOrEqualTo(double valueToCompareAgainst) {
return valueToTest -> valueToTest <= valueToCompareAgainst;
}
static DoublePredicate isEqualTo(double valueToCompareAgainst) {
return valueToTest -> valueToTest == valueToCompareAgainst;
}
static DoublePredicate isNotEqualTo(double valueToCompareAgainst) {
return valueToTest -> valueToTest != valueToCompareAgainst;
}
DoublePredicate isMissing = i -> i != i;
DoublePredicate isNotMissing = i -> i == i;
}