Examples with Extension org.matheclipse.core.io.Extension used on opensource projects

Example 6 with Extension

use of org.matheclipse.core.io.Extension in project symja_android_library by axkr.

the class Import method evaluate.

@Override
public IExpr evaluate(final IAST ast, EvalEngine engine) {
    if (Config.isFileSystemEnabled(engine)) {
        if (!(ast.arg1() instanceof IStringX)) {
            return F.NIL;
        }
        IStringX arg1 = (IStringX) ast.arg1();
        Extension format = Extension.importFilename(arg1.toString());
        String fileName = arg1.toString();
        if (ast.size() > 2) {
            if (!(ast.arg2() instanceof IStringX)) {
                return F.NIL;
            }
            format = Extension.importExtension(((IStringX) ast.arg2()).toString());
        }
        FileReader reader = null;
        try {
            File file = new File(fileName);
            switch(format) {
                case DOT:
                case GRAPHML:
                    // graph Format
                    reader = new FileReader(fileName);
                    return graphImport(reader, format, engine);
                case EXPRESSIONJSON:
                    return expressionJSONImport(fileName);
                case JSON:
                    return jsonImport(fileName);
                case M:
                    if (ast.isAST1()) {
                        return S.Get.of(engine, ast.arg1());
                    }
                    break;
                case TABLE:
                    reader = new FileReader(fileName);
                    AST2Expr ast2Expr = new AST2Expr(engine.isRelaxedSyntax(), engine);
                    final Parser parser = new Parser(engine.isRelaxedSyntax(), true);
                    CSVFormat csvFormat = CSVFormat.RFC4180.withDelimiter(' ');
                    Iterable<CSVRecord> records = csvFormat.parse(reader);
                    IASTAppendable rowList = F.ListAlloc(256);
                    for (CSVRecord record : records) {
                        IASTAppendable columnList = F.ListAlloc(record.size());
                        for (String string : record) {
                            final ASTNode node = parser.parse(string);
                            IExpr temp = ast2Expr.convert(node);
                            columnList.append(temp);
                        }
                        rowList.append(columnList);
                    }
                    return rowList;
                case STRING:
                    return ofString(file, engine);
                case TXT:
                    return ofText(file, engine);
                case WXF:
                    byte[] byteArray = com.google.common.io.Files.toByteArray(file);
                    return WL.deserialize(byteArray);
                default:
            }
        } catch (IOException ioe) {
            LOGGER.log(engine.getLogLevel(), "Import: file {} not found!", fileName, ioe);
        } catch (SyntaxError se) {
            LOGGER.log(engine.getLogLevel(), "Import: file {} syntax error!", fileName, se);
        } catch (Exception ex) {
            LOGGER.log(engine.getLogLevel(), "Import: file {} ", fileName, ex);
        } finally {
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException e) {
                }
            }
        }
    }
    return F.NIL;
}