001package org.gwtbootstrap3.client.ui.form.validator;
002
003/*
004 * #%L
005 * GwtBootstrap3
006 * %%
007 * Copyright (C) 2015 GwtBootstrap3
008 * %%
009 * Licensed under the Apache License, Version 2.0 (the "License");
010 * you may not use this file except in compliance with the License.
011 * You may obtain a copy of the License at
012 * 
013 *      http://www.apache.org/licenses/LICENSE-2.0
014 * 
015 * Unless required by applicable law or agreed to in writing, software
016 * distributed under the License is distributed on an "AS IS" BASIS,
017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
018 * See the License for the specific language governing permissions and
019 * limitations under the License.
020 * #L%
021 */
022
023import java.util.List;
024
025import com.google.gwt.editor.client.Editor;
026import com.google.gwt.editor.client.EditorError;
027
028/**
029 * An input validator.
030 *
031 * @param <T> the type.
032 * @author Steven Jardine
033 */
034public interface Validator<T> {
035
036    /**
037     * Represents the priority of a validator.
038     */
039    public static class Priority {
040
041        /** HIGHEST priority */
042        public static final int HIGHEST = 0;
043
044        /** HIGH priority */
045        public static final int HIGH = 25;
046
047        /** MEDIUM priority */
048        public static final int MEDIUM = 50;
049
050        /** LOW priority */
051        public static final int LOW = 75;
052
053        /** LOWEST priority */
054        public static final int LOWEST = 100;
055
056    }
057
058    /**
059     * Priority value for this validator. Lower the number, higher the priority.
060     * @return the priority.
061     */
062    int getPriority();
063
064    /**
065     * Validate the field.
066     *
067     * @param editor the {@link Editor}.
068     * @param value the value
069     * @return the list
070     */
071    List<EditorError> validate(Editor<T> editor, T value);
072
073}