org.pdfgal.pdfgalweb.validators.SplitValidator.java Source code

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Here is the source code for org.pdfgal.pdfgalweb.validators.SplitValidator.java

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/*
 * PDFGalWeb
 * Copyright (c) 2014, Alejandro Pernas Pan, All rights reserved.
 * 
 * This library 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 3.0 of the License, or (at your option) any later version.
    
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library.
 */

package org.pdfgal.pdfgalweb.validators;

import org.pdfgal.pdfgalweb.forms.SplitForm;
import org.pdfgal.pdfgalweb.model.enumerated.PDFEncryptionType;
import org.pdfgal.pdfgalweb.model.enumerated.SplitMode;
import org.pdfgal.pdfgalweb.utils.FileUtils;
import org.pdfgal.pdfgalweb.validators.utils.ValidatorUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.validation.Errors;
import org.springframework.validation.Validator;
import org.springframework.web.multipart.MultipartFile;

@Component
public class SplitValidator implements Validator {

    @Autowired
    private FileUtils fileUtils;

    @Autowired
    private ValidatorUtils validatorUtils;

    @Override
    public boolean supports(final Class<?> clazz) {
        return SplitForm.class.equals(clazz);
    }

    @Override
    public void validate(final Object target, final Errors errors) {

        final SplitForm splitForm = (SplitForm) target;

        // File validation
        final MultipartFile file = splitForm.getFile();
        this.validatorUtils.validateFile(file, errors, PDFEncryptionType.NON_ENCRYPTED);

        // SplitMode and pages validation
        final SplitMode splitMode = splitForm.getSplitMode();
        final String pages = splitForm.getPages();
        if (SplitMode.NUMBER_OF_PAGES.equals(splitMode)) {
            // Pages validation when SplitMode refers to the number of pages for
            // each new document
            if (!this.validateNumberOfPages(pages)) {
                errors.rejectValue("pages", "split.validator.pages.number");
            }
        } else if (SplitMode.CONCRETE_PAGES_TO_SPLIT.equals(splitMode)) {
            // Pages validation when SplitMode refers to the concrete pages to
            // split the document
            if (!this.validatorUtils.validateConcretePages(pages, file, ",", null, true, true)) {
                errors.rejectValue("pages", "split.validator.pages.concrete");
            }
        }
    }

    /**
     * Validates if argument is an {@link Integer} greater than 0.
     * 
     * @param pages
     * @return
     */
    private boolean validateNumberOfPages(final String pages) {

        boolean result = true;

        try {
            final Integer pagesValue = Integer.valueOf(pages);
            if (pagesValue.compareTo(new Integer(1)) < 0) {
                result = false;
            }
        } catch (final NumberFormatException e) {
            result = false;
        }

        return result;
    }
}