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package jcgp.backend.function;
import java.util.ArrayList;
import java.util.Arrays;
import jcgp.backend.exceptions.InvalidArgumentsException;
import jcgp.backend.population.Connection;
public class Arithmetic extends FunctionSet {
public Arithmetic() {
name = "Arithmetic";
functionList = new Function[]{
new Addition(),
new Subtraction(),
new Multiplication(),
new Division()};
allowedFunctions = new ArrayList<Function>(Arrays.asList(functionList));
}
public static class Addition extends Function {
private int arity = 2;
@Override
public Integer run(Connection... connections) {
if (connections.length < arity) {
throw new InvalidArgumentsException("Not enough connections were given.");
} else {
Integer arg1 = ((Integer) connections[0].getValue());
Integer arg2 = ((Integer) connections[1].getValue());
Integer result = arg1 + arg2;
return result;
}
}
@Override
public int getArity() {
return arity;
}
@Override
public String getName() {
return "Addition";
}
}
public static class Subtraction extends Function {
private int arity = 2;
@Override
public Integer run(Connection... connections) {
if (connections.length < arity) {
throw new InvalidArgumentsException("Not enough connections were given.");
} else {
Integer arg1 = ((Integer) connections[0].getValue());
Integer arg2 = ((Integer) connections[1].getValue());
Integer result = arg1 - arg2;
return result;
}
}
@Override
public int getArity() {
return arity;
}
@Override
public String getName() {
return "Subtraction";
}
}
public static class Multiplication extends Function {
private int arity = 2;
@Override
public Integer run(Connection... connections) {
if (connections.length < arity) {
throw new InvalidArgumentsException("Not enough connections were given.");
} else {
Integer arg1 = ((Integer) connections[0].getValue());
Integer arg2 = ((Integer) connections[1].getValue());
Integer result = arg1 * arg2;
return result;
}
}
@Override
public int getArity() {
return arity;
}
@Override
public String getName() {
return "Multiplication";
}
}
public static class Division extends Function {
private int arity = 2;
@Override
public Integer run(Connection... connections) {
if (connections.length < arity) {
throw new InvalidArgumentsException("Not enough connections were given.");
} else {
Integer arg1 = ((Integer) connections[0].getValue());
Integer arg2 = ((Integer) connections[1].getValue());
Integer result;
if (arg2 == 0) {
result = 0;
} else {
result = arg1 / arg2;
}
return result;
}
}
@Override
public int getArity() {
return arity;
}
@Override
public String getName() {
return "Division";
}
}
}
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