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/*
* SPDX-FileCopyrightText: 2023 The Refinery Authors <https://refinery.tools/>
*
* SPDX-License-Identifier: EPL-2.0
*/
package tools.refinery.logic.term;
import java.util.Objects;
import java.util.Optional;
public class Parameter {
public static final Parameter NODE_OUT = new Parameter(null);
private final Class<?> dataType;
private final ParameterDirection direction;
public Parameter(Class<?> dataType) {
this(dataType, ParameterDirection.OUT);
}
public Parameter(Class<?> dataType, ParameterDirection direction) {
this.dataType = dataType;
this.direction = direction;
}
public boolean isNodeVariable() {
return dataType == null;
}
public boolean isDataVariable() {
return !isNodeVariable();
}
public Optional<Class<?>> tryGetType() {
return Optional.ofNullable(dataType);
}
public ParameterDirection getDirection() {
return direction;
}
public boolean matches(Parameter other) {
return Objects.equals(dataType, other.dataType) && direction == other.direction;
}
public boolean isAssignable(Variable variable) {
if (variable instanceof AnyDataVariable dataVariable) {
return dataVariable.getType().equals(dataType);
} else if (variable instanceof NodeVariable) {
return !isDataVariable();
} else {
throw new IllegalArgumentException("Unknown variable " + variable);
}
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Parameter parameter = (Parameter) o;
return matches(parameter);
}
@Override
public int hashCode() {
return Objects.hash(dataType, direction);
}
}
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