ParentCriteria.java

package org.activityinfo.core.shared.criteria;

import org.activityinfo.model.resource.ResourceId;
import org.activityinfo.core.shared.Projection;
import org.activityinfo.model.form.FormInstance;

import javax.annotation.Nonnull;
import java.util.Objects;

/**
 * Criteria that filters on the parent's id
 */
public class ParentCriteria implements Criteria {

    private final ResourceId parentId;

    private ParentCriteria(ResourceId id) {
        this.parentId = id;
    }

    @Override
    public void accept(CriteriaVisitor visitor) {
        visitor.visitParentCriteria(this);
    }

    public boolean selectsRoot() {
        return parentId == null;
    }

    public ResourceId getParentId() {
        return parentId;
    }

    @Override
    public boolean apply(@Nonnull FormInstance instance) {
        return Objects.equals(parentId, instance.getOwnerId());
    }

    @Override
    public boolean apply(@Nonnull Projection projection) {
        // todo
        return true;
    }

    public static ParentCriteria isRoot() {
        return new ParentCriteria(null);
    }

    public static ParentCriteria isChildOf(ResourceId id) {
        return new ParentCriteria(id);
    }
}