RequiredListBounds.java

/*
 Copyright 2014 Red Hat, Inc. and/or its affiliates.

 This file is part of darcy-ui.

 This program 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.

 This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.redhat.darcy.ui.internal;

import com.redhat.darcy.ui.annotations.DefaultRequire;
import com.redhat.darcy.ui.annotations.Require;

import java.lang.reflect.Field;
import java.util.Optional;

public class RequiredListBounds {
    private final int atLeast;
    private final int atMost;

    public RequiredListBounds(Field field) {
        Require annotation = Optional.ofNullable(field.getAnnotation(Require.class))
                .orElse(new DefaultRequire());

        if (annotation.exactly() >= 0) {
            atLeast = atMost = annotation.exactly();
        } else {
            atLeast = annotation.atLeast();
            atMost = annotation.atMost();
        }
    }

    public int atLeast() {
        return atLeast;
    }

    public int atMost() {
        return atMost;
    }
}