Examples with MapColumnDefn org.apache.drill.exec.store.image.ImageBatchReader.MapColumnDefn used on opensource projects

Example 1 with MapColumnDefn

use of org.apache.drill.exec.store.image.ImageBatchReader.MapColumnDefn in project drill by apache.

the class ImageDirectoryProcessor method processXmpDirectory.

protected static void processXmpDirectory(final MapColumnDefn writer, final XmpDirectory directory) {
    XMPMeta xmpMeta = directory.getXMPMeta();
    if (xmpMeta != null) {
        try {
            IteratorOptions iteratorOptions = new IteratorOptions().setJustLeafnodes(true);
            for (final XMPIterator i = xmpMeta.iterator(iteratorOptions); i.hasNext(); ) {
                try {
                    XMPPropertyInfo prop = (XMPPropertyInfo) i.next();
                    String path = prop.getPath();
                    String value = prop.getValue();
                    if (path != null && value != null) {
                        // handling lang-alt array items
                        if (prop.getOptions().getHasLanguage()) {
                            XMPPropertyInfo langProp = (XMPPropertyInfo) i.next();
                            if (langProp.getPath().endsWith("/xml:lang")) {
                                String lang = langProp.getValue();
                                path = path.replaceFirst("\\[\\d+\\]$", "") + (lang.equals("x-default") ? "" : "_" + lang);
                            }
                        }
                        ColumnDefn rootColumn = writer;
                        ColumnWriter subColumn = null;
                        String[] elements = path.replaceAll("/\\w+:", "/").split(":|/|(?=\\[)");
                        // 1. lookup and create nested structure
                        for (int j = 1; j < elements.length; j++) {
                            String parent = elements[j - 1];
                            boolean isList = elements[j].startsWith("[");
                            if (!parent.startsWith("[")) {
                                // skipped. such as parent is [1] but not the last element
                                final String formatName = ImageMetadataUtils.formatName(parent);
                                if (isList) {
                                    if (j + 1 == elements.length) {
                                        // for list
                                        subColumn = rootColumn.addList(formatName);
                                    } else {
                                        // for list-map
                                        subColumn = rootColumn.addListMap(formatName);
                                    }
                                    rootColumn = new ListColumnDefn(formatName).builder((ArrayWriter) subColumn);
                                } else {
                                    // for map
                                    subColumn = ((MapColumnDefn) rootColumn).addMap(formatName);
                                    // set up the current writer in nested structure
                                    rootColumn = new MapColumnDefn(formatName).builder((TupleWriter) subColumn);
                                }
                            }
                        }
                        // 2. set up the value for writer
                        String parent = elements[elements.length - 1];
                        if (parent.startsWith("[")) {
                            subColumn.setObject(new String[] { value });
                        } else {
                            rootColumn.addText(ImageMetadataUtils.formatName(parent)).setString(value);
                            if (subColumn instanceof ArrayWriter) {
                                ((ArrayWriter) subColumn).save();
                            }
                        }
                    }
                } catch (Exception skipped) {
                    // simply skip this property
                    logger.warn("Error in written xmp metadata : {}", skipped.getMessage());
                }
            }
        } catch (XMPException ignored) {
            logger.warn("Error in processing xmp directory : {}", ignored.getMessage());
        }
    }
}