pl.ais.commons.bean.validation.constrainable.ConstrainableGroup Maven / Gradle / Ivy
package pl.ais.commons.bean.validation.constrainable;
import pl.ais.commons.bean.validation.Constraint;
import javax.annotation.Nonnull;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.stream.Collectors;
/**
* Constrainable group of values.
*
* @author Warlock, AIS.PL
* @since 1.2.1
*/
@SuppressWarnings("PMD.AbstractNaming")
public abstract class ConstrainableGroup implements Constrainable {
protected final Collection elements;
protected ConstrainableGroup(final T first, final T second, final T... rest) {
elements = new ArrayList<>(2 + rest.length);
elements.add(first);
elements.add(second);
elements.addAll(Arrays.asList(rest));
}
/**
* Creates and returns constrainable over group of given values.
*
* Constrainable created by this method is satisfying some constraint if and only if all constrainable values
* enclosed by it are satisfying the constraint.
*
* @param the type of constrainable values
* @param first first constrainable value
* @param second second constrainable value
* @param rest remaining constrainable values
* @return constrainable over group of given values
*/
public static Constrainable allOf(final T first, final T second, final T... rest) {
return new ConstrainableGroup(first, second, rest) {
/**
* {@inheritDoc}
*/
@Override
public Boolean apply(final Constraint constraint) {
return elements.stream()
.allMatch(constraint::test);
}
/**
* {@inheritDoc}
*/
@Override
public String toString() {
return elements.stream()
.map(element -> (null == element) ? "null" : "'" + element + "'")
.collect(Collectors.joining(", ", "All values of group composed of: [", "]"));
}
};
}
/**
* Creates and returns constrainable over group of given values.
*
* Constrainable created by this method is satisfying some constraint if and only if any constrainable value
* enclosed by it is satisfying the constraint.
*
* @param the type of constrainable values
* @param first first constrainable value
* @param second second constrainable value
* @param rest remaining constrainable values
* @return constrainable over group of given values
*/
public static Constrainable anyOf(final T first, final T second, final T... rest) {
return new ConstrainableGroup(first, second, rest) {
/**
* {@inheritDoc}
*/
@Override
public Boolean apply(final Constraint constraint) {
return elements.stream()
.anyMatch(constraint::test);
}
/**
* {@inheritDoc}
*/
@Override
public String toString() {
return elements.stream()
.map(element -> (null == element) ? "null" : "'" + element + "'")
.collect(Collectors.joining(", ", "Any value from group composed of : [", "]"));
}
};
}
/**
* {@inheritDoc}
*/
@Override
public R accept(@Nonnull final ConstrainableVisitor visitor) {
return visitor.visit(this);
}
}