org.smigo.constraints.CommonsMultipartFileImageValidator.java Source code

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Here is the source code for org.smigo.constraints.CommonsMultipartFileImageValidator.java

Source

package org.smigo.constraints;

/*
 * #%L
 * Smigo
 * %%
 * Copyright (C) 2015 Christian Nilsson
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser 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 Lesser Public License for more details.
 * 
 * You should have received a copy of the GNU General Lesser Public
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/lgpl-3.0.html>.
 * #L%
 */

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.multipart.commons.CommonsMultipartFile;

import javax.imageio.ImageIO;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import java.awt.image.BufferedImage;

class CommonsMultipartFileImageValidator
        implements ConstraintValidator<CommonsMultipartFileImage, CommonsMultipartFile> {
    private static final Logger log = LoggerFactory.getLogger(CommonsMultipartFileImageValidator.class);
    private long height;
    private long width;

    public void initialize(CommonsMultipartFileImage constraintAnnotation) {
        height = constraintAnnotation.height();
        width = constraintAnnotation.width();
    }

    public boolean isValid(CommonsMultipartFile file, ConstraintValidatorContext constraintContext) {
        log.debug("Validating:" + file.getOriginalFilename() + " contenttype:" + file.getContentType()
                + " storagedescrip:" + file.getStorageDescription());
        if (file.isEmpty())
            return true;
        try {
            BufferedImage image = ImageIO.read(file.getInputStream());
            if (image.getHeight() == height && image.getWidth() == width)
                return true;
        } catch (Exception e) {
            return false;
        }
        return false;
    }
}