/*
* Created on 24/giu/2010
*
* Copyright 2010 by Andrea Vacondio (andrea.vacondio@gmail.com).
*
* This file is part of the Sejda source code
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.sejda.model.validation.validator;
import static org.apache.commons.io.FilenameUtils.indexOfExtension;
import static org.apache.commons.lang3.StringUtils.equalsIgnoreCase;
import java.io.File;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import org.apache.commons.io.FilenameUtils;
import org.sejda.model.validation.constraint.FileExtension;
/**
* Validates the extension of the a {@link File}.
*
* @author Andrea Vacondio
*
*/
public class FileExtensionValidator implements ConstraintValidator<FileExtension, File> {
private String expectedExtension;
@Override
public void initialize(FileExtension constraintAnnotation) {
expectedExtension = constraintAnnotation.value();
}
@Override
public boolean isValid(File value, ConstraintValidatorContext context) {
if (value != null && value.isFile()) {
String extension = FilenameUtils.getExtension(value.getName());
return equalsIgnoreCase(expectedExtension, extension) && indexOfExtension(value.getName()) > 0;
}
return true;
}
}