Examples with ImgFilenameFilter eu.transkribus.core.io.util.ImgFilenameFilter used on opensource projects

Example 1 with ImgFilenameFilter

use of eu.transkribus.core.io.util.ImgFilenameFilter in project TranskribusCore by Transkribus.

the class TrpDocUploadBuilder method validateAndNormalize.

/**
 *Ensures that all images have filenames assigned and page indices are iterated throughout the structure
 * If page indices start from 0 they will be incremented by 1 in order to be compatible with METS-style counting.
 * If XML filenames have the "page/" dir prefix, it will be removed.
 * @param pages
 */
public static void validateAndNormalize(List<PageUploadDescriptor> pages) {
    if (pages.isEmpty()) {
        throw new IllegalArgumentException("Image list is empty!");
    }
    ImgFilenameFilter imgNameFilter = new ImgFilenameFilter();
    // check page indices
    int i = pages.get(0).getPageNr();
    // check if it starts with 1 or 0
    boolean pageCountFromZero = false;
    if (i == 0) {
        // increment all indexes by 1
        pageCountFromZero = true;
    } else if (i < 0 || i > 1) {
        throw new IllegalArgumentException("page indexes have to start with 1 or 0!");
    }
    for (PageUploadDescriptor img : pages) {
        // check page indexes for continuity
        if (img.getPageNr() != i) {
            throw new IllegalArgumentException("Page indexes are inconsistent!");
        } else {
            i++;
        }
        // correct the index if counting starts from zero as METS also includes counts starting from 1
        if (pageCountFromZero) {
            img.setPageNr(img.getPageNr() + 1);
        }
        // ensure that at least the img filename is set
        if (StringUtils.isEmpty(img.getFileName())) {
            throw new IllegalArgumentException("Image filename is empty for page index: " + img.getPageNr());
        }
        if (!imgNameFilter.accept(null, img.getFileName())) {
            throw new IllegalArgumentException("Image type is not supported: " + img.getFileName());
        }
        if (!StringUtils.isEmpty(img.getPageXmlName()) && img.getPageXmlName().startsWith(LocalDocConst.PAGE_FILE_SUB_FOLDER + "/")) {
            // remove the "page/" prefix in XML filename if existent
            img.setPageXmlName(img.getPageXmlName().replaceFirst(LocalDocConst.PAGE_FILE_SUB_FOLDER + "/", ""));
        }
    }
}