Examples with LineNumberReader java.io.LineNumberReader used on opensource projects

Example 96 with LineNumberReader

use of java.io.LineNumberReader in project gephi by gephi.

the class ImporterSpreadsheetCSV method autoDetectFieldDelimiter.

private void autoDetectFieldDelimiter() {
    // Very simple naive detector but should work in most cases:
    try (LineNumberReader reader = ImportUtils.getTextReader(FileUtil.toFileObject(file))) {
        String line = reader.readLine();
        // Check for typical delimiter chars in the header
        int commaCount = 0;
        int semicolonCount = 0;
        int tabCount = 0;
        int spaceCount = 0;
        boolean inQuote = false;
        for (char c : line.toCharArray()) {
            if (c == '"' || c == '\'') {
                inQuote = !inQuote;
            }
            if (!inQuote) {
                switch(c) {
                    case ',':
                        commaCount++;
                        break;
                    case ';':
                        semicolonCount++;
                        break;
                    case '\t':
                        tabCount++;
                        break;
                    case ' ':
                        spaceCount++;
                        break;
                }
            }
        }
        int max = Collections.max(Arrays.asList(commaCount, semicolonCount, tabCount, spaceCount));
        if (commaCount == max) {
            fieldDelimiter = ',';
        } else if (semicolonCount == max) {
            fieldDelimiter = ';';
        } else if (tabCount == max) {
            fieldDelimiter = '\t';
        } else if (spaceCount == max) {
            fieldDelimiter = ' ';
        }
    } catch (IOException ex) {
    }
}

Example 97 with LineNumberReader

use of java.io.LineNumberReader in project gephi by gephi.

the class ImportUtils method getTextReader.

/**
 * Returns a <code>LineNumberReader</code> for <code>inputStream</code>. The
 * stream must be a character stream. The charset is detected automatically.
 *
 * @param stream the stream that is to be read
 * @return a reader for the character stream
 * @throws IOException if the stream can't be read
 */
public static LineNumberReader getTextReader(InputStream stream) throws IOException {
    LineNumberReader reader;
    CharsetToolkit charsetToolkit = new CharsetToolkit(stream);
    reader = (LineNumberReader) charsetToolkit.getReader();
    return reader;
}

Example 98 with LineNumberReader

use of java.io.LineNumberReader in project jackrabbit-oak by apache.

the class QueryRecorder method main.

public static void main(String... args) throws IOException {
    // command line version: read from a file
    LineNumberReader reader = new LineNumberReader(new BufferedReader(new FileReader(args[0])));
    TreeSet<String> sorted = new TreeSet<String>();
    int lineCount = 0;
    while (true) {
        String line = reader.readLine();
        if (line == null) {
            break;
        }
        sorted.add(simplify(line));
        lineCount++;
    }
    reader.close();
    for (String s : sorted) {
        System.out.println(s);
    }
    System.out.println("sorted: " + sorted.size() + " original: " + lineCount);
}

Example 99 with LineNumberReader

use of java.io.LineNumberReader in project h2database by h2database.

the class TestShell method test.

private void test(final boolean commandLineArgs) throws IOException {
    PipedInputStream testIn = new PipedInputStream();
    PipedOutputStream out = new PipedOutputStream(testIn);
    toolOut = new PrintStream(out, true);
    out = new PipedOutputStream();
    PrintStream testOut = new PrintStream(out, true);
    toolIn = new PipedInputStream(out);
    Task task = new Task() {

        @Override
        public void call() throws Exception {
            try {
                Shell shell = new Shell();
                shell.setIn(toolIn);
                shell.setOut(toolOut);
                shell.setErr(toolOut);
                if (commandLineArgs) {
                    shell.runTool("-url", "jdbc:h2:mem:", "-user", "sa", "-password", "sa");
                } else {
                    shell.runTool();
                }
            } finally {
                toolOut.close();
            }
        }
    };
    task.execute();
    InputStreamReader reader = new InputStreamReader(testIn);
    lineReader = new LineNumberReader(reader);
    read("");
    read("Welcome to H2 Shell");
    read("Exit with");
    if (!commandLineArgs) {
        read("[Enter]");
        testOut.println("jdbc:h2:mem:");
        read("URL");
        testOut.println("");
        read("Driver");
        testOut.println("sa");
        read("User");
        testOut.println("sa");
        read("Password");
    }
    read("Commands are case insensitive");
    read("help or ?");
    read("list");
    read("maxwidth");
    read("autocommit");
    read("history");
    read("quit or exit");
    read("");
    testOut.println("history");
    read("sql> No history");
    testOut.println("1");
    read("sql> Not found");
    testOut.println("select 1 a;");
    read("sql> A");
    read("1");
    read("(1 row,");
    testOut.println("history");
    read("sql> #1: select 1 a");
    read("To re-run a statement, type the number and press and enter");
    testOut.println("1");
    read("sql> select 1 a");
    read("A");
    read("1");
    read("(1 row,");
    testOut.println("select 'x' || space(1000) large, 'y' small;");
    read("sql> LARGE");
    read("x");
    read("(data is partially truncated)");
    read("(1 row,");
    testOut.println("select x, 's' s from system_range(0, 10001);");
    read("sql> X    | S");
    for (int i = 0; i < 10000; i++) {
        read((i + "     ").substring(0, 4) + " | s");
    }
    for (int i = 10000; i <= 10001; i++) {
        read((i + "     ").substring(0, 5) + " | s");
    }
    read("(10002 rows,");
    testOut.println("select error;");
    read("sql> Error:");
    if (read("").startsWith("Column \"ERROR\" not found")) {
        read("");
    }
    testOut.println("create table test(id int primary key, name varchar)\n;");
    read("sql> ...>");
    testOut.println("insert into test values(1, 'Hello');");
    read("sql>");
    testOut.println("select null n, * from test;");
    read("sql> N    | ID | NAME");
    read("null | 1  | Hello");
    read("(1 row,");
    // test history
    for (int i = 0; i < 30; i++) {
        testOut.println("select " + i + " ID from test;");
        read("sql> ID");
        read("" + i);
        read("(1 row,");
    }
    testOut.println("20");
    read("sql> select 10 ID from test");
    read("ID");
    read("10");
    read("(1 row,");
    testOut.println("maxwidth");
    read("sql> Usage: maxwidth <integer value>");
    read("Maximum column width is now 100");
    testOut.println("maxwidth 80");
    read("sql> Maximum column width is now 80");
    testOut.println("autocommit");
    read("sql> Usage: autocommit [true|false]");
    read("Autocommit is now true");
    testOut.println("autocommit false");
    read("sql> Autocommit is now false");
    testOut.println("autocommit true");
    read("sql> Autocommit is now true");
    testOut.println("list");
    read("sql> Result list mode is now on");
    testOut.println("select 1 first, 2 second;");
    read("sql> FIRST : 1");
    read("SECOND: 2");
    read("(1 row, ");
    testOut.println("select x from system_range(1, 3);");
    read("sql> X: 1");
    read("");
    read("X: 2");
    read("");
    read("X: 3");
    read("(3 rows, ");
    testOut.println("select x, 2 as y from system_range(1, 3) where 1 = 0;");
    read("sql> X");
    read("Y");
    read("(0 rows, ");
    testOut.println("list");
    read("sql> Result list mode is now off");
    testOut.println("help");
    read("sql> Commands are case insensitive");
    read("help or ?");
    read("list");
    read("maxwidth");
    read("autocommit");
    read("history");
    read("quit or exit");
    read("");
    testOut.println("exit");
    read("sql>");
    task.get();
}

Example 100 with LineNumberReader

use of java.io.LineNumberReader in project h2database by h2database.

the class Profiler method readRunnableStackTraces.

private static List<Object[]> readRunnableStackTraces(int pid) {
    try {
        String jstack = exec("jstack", "" + pid);
        LineNumberReader r = new LineNumberReader(new StringReader(jstack));
        return readStackTrace(r);
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
}