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 org.gwtbootstrap3.client.ui.form.validator.ValidationMessages.Keys;
024
025import com.google.gwt.regexp.shared.RegExp;
026
027/**
028 * Validator for checking value matches a regular expression.
029 *
030 * @param <T> the generic type
031 * @author Steven Jardine
032 */
033public class RegExValidator extends AbstractValidator<String> {
034
035    private RegExp regex;
036
037    public RegExValidator(String pattern) {
038        super(Keys.REGEX, new Object[0]);
039        regex = RegExp.compile(pattern);
040    }
041
042    public RegExValidator(String pattern, String invalidMessageOverride) {
043        super(invalidMessageOverride);
044        regex = RegExp.compile(pattern);
045    }
046
047    /** {@inheritDoc} */
048    @Override
049    public int getPriority() {
050        return Priority.MEDIUM;
051    }
052
053    /** {@inheritDoc} */
054    @Override
055    public boolean isValid(String value) {
056        return value == null || regex.test(value);
057    }
058
059}