Java tutorial
/* documentr - Edit, maintain, and present software documentation on the web. Copyright (C) 2012-2013 Maik Schreiber 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 de.blizzy.documentr.validation; import java.util.regex.Pattern; import javax.validation.ConstraintValidator; import javax.validation.ConstraintValidatorContext; import org.apache.commons.lang3.StringUtils; import de.blizzy.documentr.DocumentrConstants; import de.blizzy.documentr.validation.annotation.ValidMacroName; public class MacroNameValidator implements ConstraintValidator<ValidMacroName, String> { @Override public void initialize(ValidMacroName annotation) { } @Override public boolean isValid(String value, ConstraintValidatorContext context) { if (StringUtils.isBlank(value)) { return true; } return Pattern.matches("^" + DocumentrConstants.MACRO_NAME_PATTERN + "$", value); //$NON-NLS-1$ //$NON-NLS-2$ } }