smile.data.formula.AbstractBiFunction Maven / Gradle / Ivy
/*
* Copyright (c) 2010-2021 Haifeng Li. All rights reserved.
*
* Smile is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Smile is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Smile. If not, see .
*/
package smile.data.formula;
import java.util.HashSet;
import java.util.Set;
/**
* This class provides a skeletal implementation of the bi-function term.
*
* @author Haifeng Li
*/
public abstract class AbstractBiFunction implements Term {
/** The name of function. */
final String name;
/** The first parameter of function. */
final Term x;
/** The second parameter of function. */
final Term y;
/**
* Constructor.
*
* @param name the function name.
* @param x the first parameter of function.
* @param y the second parameter of function.
*/
public AbstractBiFunction(String name, Term x, Term y) {
this.name = name;
this.x = x;
this.y = y;
}
@Override
public String toString() {
return String.format("%s(%s, %s)", name, x, y);
}
@Override
public Set variables() {
Set vars = new HashSet<>(x.variables());
vars.addAll(y.variables());
return vars;
}
}