001/*
002 * #%L
003 * GwtBootstrap3
004 * %%
005 * Copyright (C) 2015 GwtBootstrap3
006 * %%
007 * Licensed under the Apache License, Version 2.0 (the "License");
008 * you may not use this file except in compliance with the License.
009 * You may obtain a copy of the License at
010 * 
011 *      http://www.apache.org/licenses/LICENSE-2.0
012 * 
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 * #L%
019 */
020package gwt.material.design.client.base.validator;
021
022import com.google.gwt.editor.client.Editor;
023import com.google.gwt.editor.client.EditorError;
024
025import java.util.List;
026
027/**
028 * An input validator.
029 *
030 * @param <T> the type.
031 * @author Steven Jardine
032 */
033public interface Validator<T> {
034
035    /**
036     * Represents the priority of a validator.
037     */
038    public static class Priority {
039
040        /**
041         * HIGHEST priority
042         */
043        public static final int HIGHEST = 0;
044
045        /**
046         * HIGH priority
047         */
048        public static final int HIGH = 25;
049
050        /**
051         * MEDIUM priority
052         */
053        public static final int MEDIUM = 50;
054
055        /**
056         * LOW priority
057         */
058        public static final int LOW = 75;
059
060        /**
061         * LOWEST priority
062         */
063        public static final int LOWEST = 100;
064
065    }
066
067    /**
068     * Priority value for this validator. Lower the number, higher the priority.
069     *
070     * @return the priority.
071     */
072    int getPriority();
073
074    /**
075     * Validate the field.
076     *
077     * @param editor the {@link Editor}.
078     * @param value  the value
079     * @return the list
080     */
081    List<EditorError> validate(Editor<T> editor, T value);
082}