Java Code Examples for java.io.Reader#reset()

The following examples show how to use java.io.Reader#reset() . These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
public static String markRead(Reader a, int x, int y) throws IOException {
    int m = 0;
    int r;
    StringBuilder builder = new StringBuilder();
    do {
        m++;
        r = a.read();
        if (m == x)
            a.mark((x + y));
        if (m == (x + y))
            a.reset();

        if (r != -1)
            builder.append((char) r);
    } while (r != -1);
    return builder.toString();
}
 
Example 2
public static String markRead(Reader a, int x, int y) throws IOException {
    int m = 0;
    int r;
    StringBuilder builder = new StringBuilder();
    do {
        m++;
        r = a.read();
        if (m == x)
            a.mark((x + y));
        if (m == (x + y))
            a.reset();

        if (r != -1)
            builder.append((char) r);
    } while (r != -1);
    return builder.toString();
}
 
Example 3
Source Project: openbd-core   File: cfFile.java    License: GNU General Public License v3.0 6 votes vote down vote up
private static boolean isCFENCODED(Reader _inFile) throws IOException {
	CharArrayWriter buffer = new CharArrayWriter(CFENCODE_HEADER_LEN);

	_inFile.mark(CFENCODE_HEADER_LEN);

	for (int i = 0; i < CFENCODE_HEADER_LEN; i++) {
		buffer.write(_inFile.read());
	}

	if (buffer.toString().equals(CFENCODE_HEADER)) {
		return true;
	}

	_inFile.reset();
	return false;
}
 
Example 4
Source Project: Tomcat8-Source-Read   File: Host.java    License: MIT License 6 votes vote down vote up
private static int parse(Reader reader) {
    try {
        reader.mark(1);
        int first = reader.read();
        reader.reset();
        if (HttpParser.isAlpha(first)) {
            return HttpParser.readHostDomainName(reader);
        } else if (HttpParser.isNumeric(first)) {
            return HttpParser.readHostIPv4(reader, false);
        } else if ('[' == first) {
            return HttpParser.readHostIPv6(reader);
        } else {
            // Invalid
            throw new IllegalArgumentException();
        }
    } catch (IOException ioe) {
        // Should never happen
        throw new IllegalArgumentException(ioe);
    }
}
 
Example 5
public static String markRead(Reader a, int x, int y) throws IOException {
    int m = 0;
    int r;
    StringBuilder builder = new StringBuilder();
    do {
        m++;
        r = a.read();
        if (m == x)
            a.mark((x + y));
        if (m == (x + y))
            a.reset();

        if (r != -1)
            builder.append((char) r);
    } while (r != -1);
    return builder.toString();
}
 
Example 6
private static char[] readCharArray(Reader reader) throws IOException {
    if (reader.markSupported()) {
        reader.mark(1024);
    }
    int length = reader.read();
    int delimiter = reader.read();
    if (delimiter != 0) {
        if (reader.markSupported()) {
            reader.reset();
        }
        throw new IOException("Unsupported reply exception");
    }
    char[] buffer = new char[length];
    reader.read(buffer);
    return buffer;
}
 
Example 7
Source Project: gemfirexd-oss   File: BlobClobTestSetup.java    License: Apache License 2.0 6 votes vote down vote up
/**
   * Fetch a sample Clob.
   * If this method fails, the test fails.
   *
   * @param con database connection to fetch data from.
   * @return a sample <code>Clob</code> object.
   */
  public static Clob getSampleClob(Connection con) 
      throws SQLException {
Reader clobInput = new StringReader(clobData);
      PreparedStatement pStmt = 
          con.prepareStatement("update BLOBCLOB set CLOBDATA = ? where ID = ?");
      try {
          clobInput.reset();
      } catch (IOException ioe) {
          fail("Failed to reset clob input stream: " + ioe.getMessage());
      }
      pStmt.setClob(1, clobInput, clobData.length());
      pStmt.setInt(2, ID_SAMPLEVALUES);
      assertEquals("Invalid update count", 1, pStmt.executeUpdate());
      Statement stmt = con.createStatement();
      ResultSet rs = stmt.executeQuery("select CLOBDATA from BLOBCLOB where ID = " +
              ID_SAMPLEVALUES);
      rs.next();
      Clob clob = rs.getClob(1);
      rs.close();
      stmt.close();
      return clob;
  }
 
Example 8
Source Project: gemfirexd-oss   File: BlobClobTestSetup.java    License: Apache License 2.0 6 votes vote down vote up
/**
   * Fetch a sample Clob.
   * If this method fails, the test fails.
   *
   * @param con database connection to fetch data from.
   * @return a sample <code>Clob</code> object.
   */
  public static Clob getSampleClob(Connection con) 
      throws SQLException {
Reader clobInput = new StringReader(clobData);
      PreparedStatement pStmt = 
          con.prepareStatement("update BLOBCLOB set CLOBDATA = ? where ID = ?");
      try {
          clobInput.reset();
      } catch (IOException ioe) {
          fail("Failed to reset clob input stream: " + ioe.getMessage());
      }
      pStmt.setClob(1, clobInput, clobData.length());
      pStmt.setInt(2, ID_SAMPLEVALUES);
      assertEquals("Invalid update count", 1, pStmt.executeUpdate());
      Statement stmt = con.createStatement();
      ResultSet rs = stmt.executeQuery("select CLOBDATA from BLOBCLOB where ID = " +
              ID_SAMPLEVALUES);
      rs.next();
      Clob clob = rs.getClob(1);
      rs.close();
      stmt.close();
      return clob;
  }
 
Example 9
Source Project: Tomcat8-Source-Read   File: HttpParser.java    License: MIT License 5 votes vote down vote up
static int skipLws(Reader input) throws IOException {

        input.mark(1);
        int c = input.read();

        while (c == 32 || c == 9 || c == 10 || c == 13) {
            input.mark(1);
            c = input.read();
        }

        input.reset();
        return c;
    }
 
Example 10
Source Project: jdk8u-dev-jdk   File: AVA.java    License: GNU General Public License v2.0 5 votes vote down vote up
private static boolean trailingSpace(Reader in) throws IOException {

        boolean trailing = false;

        if (!in.markSupported()) {
            // oh well
            return true;
        } else {
            // make readAheadLimit huge -
            // in practice, AVA was passed a StringReader from X500Name,
            // and StringReader ignores readAheadLimit anyways
            in.mark(9999);
            while (true) {
                int nextChar = in.read();
                if (nextChar == -1) {
                    trailing = true;
                    break;
                } else if (nextChar == ' ') {
                    continue;
                } else if (nextChar == '\\') {
                    int followingChar = in.read();
                    if (followingChar != ' ') {
                        trailing = false;
                        break;
                    }
                } else {
                    trailing = false;
                    break;
                }
            }

            in.reset();
            return trailing;
        }
    }
 
Example 11
Source Project: jdk8u60   File: AVA.java    License: GNU General Public License v2.0 5 votes vote down vote up
private static boolean trailingSpace(Reader in) throws IOException {

        boolean trailing = false;

        if (!in.markSupported()) {
            // oh well
            return true;
        } else {
            // make readAheadLimit huge -
            // in practice, AVA was passed a StringReader from X500Name,
            // and StringReader ignores readAheadLimit anyways
            in.mark(9999);
            while (true) {
                int nextChar = in.read();
                if (nextChar == -1) {
                    trailing = true;
                    break;
                } else if (nextChar == ' ') {
                    continue;
                } else if (nextChar == '\\') {
                    int followingChar = in.read();
                    if (followingChar != ' ') {
                        trailing = false;
                        break;
                    }
                } else {
                    trailing = false;
                    break;
                }
            }

            in.reset();
            return trailing;
        }
    }
 
Example 12
Source Project: openjdk-jdk8u   File: AVA.java    License: GNU General Public License v2.0 5 votes vote down vote up
private static boolean trailingSpace(Reader in) throws IOException {

        boolean trailing = false;

        if (!in.markSupported()) {
            // oh well
            return true;
        } else {
            // make readAheadLimit huge -
            // in practice, AVA was passed a StringReader from X500Name,
            // and StringReader ignores readAheadLimit anyways
            in.mark(9999);
            while (true) {
                int nextChar = in.read();
                if (nextChar == -1) {
                    trailing = true;
                    break;
                } else if (nextChar == ' ') {
                    continue;
                } else if (nextChar == '\\') {
                    int followingChar = in.read();
                    if (followingChar != ' ') {
                        trailing = false;
                        break;
                    }
                } else {
                    trailing = false;
                    break;
                }
            }

            in.reset();
            return trailing;
        }
    }
 
Example 13
Source Project: Bytecoder   File: AVA.java    License: Apache License 2.0 5 votes vote down vote up
private static boolean trailingSpace(Reader in) throws IOException {

        boolean trailing = false;

        if (!in.markSupported()) {
            // oh well
            return true;
        } else {
            // make readAheadLimit huge -
            // in practice, AVA was passed a StringReader from X500Name,
            // and StringReader ignores readAheadLimit anyways
            in.mark(9999);
            while (true) {
                int nextChar = in.read();
                if (nextChar == -1) {
                    trailing = true;
                    break;
                } else if (nextChar == ' ') {
                    continue;
                } else if (nextChar == '\\') {
                    int followingChar = in.read();
                    if (followingChar != ' ') {
                        trailing = false;
                        break;
                    }
                } else {
                    trailing = false;
                    break;
                }
            }

            in.reset();
            return trailing;
        }
    }
 
Example 14
Source Project: jdk8u_jdk   File: AVA.java    License: GNU General Public License v2.0 5 votes vote down vote up
private static boolean trailingSpace(Reader in) throws IOException {

        boolean trailing = false;

        if (!in.markSupported()) {
            // oh well
            return true;
        } else {
            // make readAheadLimit huge -
            // in practice, AVA was passed a StringReader from X500Name,
            // and StringReader ignores readAheadLimit anyways
            in.mark(9999);
            while (true) {
                int nextChar = in.read();
                if (nextChar == -1) {
                    trailing = true;
                    break;
                } else if (nextChar == ' ') {
                    continue;
                } else if (nextChar == '\\') {
                    int followingChar = in.read();
                    if (followingChar != ' ') {
                        trailing = false;
                        break;
                    }
                } else {
                    trailing = false;
                    break;
                }
            }

            in.reset();
            return trailing;
        }
    }
 
Example 15
@Override
public void reset() throws IOException {
	Reader rdr = getReader();
	if (rdr != null) {
		rdr.reset();
	}
}
 
Example 16
Source Project: groovy   File: StreamingTemplateEngine.java    License: Apache License 2.0 4 votes vote down vote up
private void handleEscaping(final Reader source,
                            final Position sourcePosition,
                            final StringSection currentSection,
                            final StringBuilder lookAhead) throws IOException, FinishedReadingException {
    //if we get here, we just read in a back-slash from the source, now figure out what to do with it
    int c = read(source, sourcePosition, lookAhead);

    /*
     The _only_ special escaping this template engine allows is to escape the sequences:
     ${ and <% and potential slashes in front of these. Escaping in any other sections of the
     source string is ignored. The following is a source -> result mapping of a few values, assume a
     binding of [alice: 'rabbit'].

     Note: we don't do java escaping of slashes in the below
     example, i.e. the source string is what you would see in a text editor when looking at your template
     file: 
     source string     result
     'bob'            -> 'bob'
     '\bob'           -> '\bob'
     '\\bob'          -> '\\bob'
     '${alice}'       -> 'rabbit'
     '\${alice}'      -> '${alice}'
     '\\${alice}'     -> '\rabbit'
     '\\$bob'         -> '\\$bob'
     '\\'             -> '\\'
     '\\\'             -> '\\\'
     '%<= alice %>'   -> 'rabbit'
     '\%<= alice %>'  -> '%<= alice %>'
     */
    if (c == '\\') {
        //this means we have received a double backslash sequence
        //if this is followed by ${ or <% we output one backslash
        //and interpret the following sequences with groovy, if followed by anything
        //else we output the two backslashes and continue as usual 
        source.mark(3);
        int d = read(source, sourcePosition, lookAhead);
        c = read(source, sourcePosition, lookAhead);
        clear(lookAhead);
        if ((d == '$' && c == '{') ||
            (d == '<' && c == '%')) {
            source.reset();
            currentSection.data.append('\\');
            return;
        } else {
            currentSection.data.append('\\');
            currentSection.data.append('\\');
            currentSection.data.append((char) d);
        }
    } else if (c == '$') {
        c = read(source, sourcePosition, lookAhead);
        if (c == '{') {
            currentSection.data.append('$');
        } else {
            currentSection.data.append('\\');
            currentSection.data.append('$');
        }
    } else if (c == '<') {
        c = read(source, sourcePosition, lookAhead);
        if (c == '%') {
            currentSection.data.append('<');
        } else {
            currentSection.data.append('\\');
            currentSection.data.append('<');
        }
    } else {
        currentSection.data.append('\\');
    }

    currentSection.data.append((char) c);
    clear(lookAhead);
}
 
Example 17
private static char peek(Reader reader) throws IOException {
	reader.mark(1000);
	final char c = (char) reader.read();
	reader.reset();
	return c;
}
 
Example 18
Source Project: Tomcat8-Source-Read   File: HttpParser.java    License: MIT License 4 votes vote down vote up
/**
 * LHEX can be read unambiguously with or without surrounding quotes so this
 * parsing method for LHEX permits optional surrounding double quotes. Some
 * buggy clients (libwww-perl for DIGEST auth) are known to send quoted LHEX
 * when the specification requires just LHEX.
 *
 * <p>
 * LHEX are, literally, lower-case hexadecimal digits. This implementation
 * allows for upper-case digits as well, converting the returned value to
 * lower-case.
 *
 * @return  the sequence of LHEX (minus any surrounding quotes) if any was
 *          found, or <code>null</code> if data other LHEX was found
 */
static String readLhex(Reader input) throws IOException {

    StringBuilder result = new StringBuilder();
    boolean quoted = false;

    skipLws(input);
    input.mark(1);
    int c = input.read();

    if (c == '"') {
        quoted = true;
    } else if (c == -1 || !isHex(c)) {
        return null;
    } else {
        if ('A' <= c && c <= 'F') {
            c -= ('A' - 'a');
        }
        result.append((char) c);
    }
    input.mark(1);
    c = input.read();

    while (c != -1 && isHex(c)) {
        if ('A' <= c && c <= 'F') {
            c -= ('A' - 'a');
        }
        result.append((char) c);
        input.mark(1);
        c = input.read();
    }

    if (quoted) {
        if (c != '"') {
            return null;
        }
    } else {
        // Use mark(1)/reset() rather than skip(-1) since skip() is a NOP
        // once the end of the String has been reached.
        input.reset();
    }

    if (c != -1 && result.length() == 0) {
        return null;
    } else {
        return result.toString();
    }
}
 
Example 19
Source Project: groovy   File: IOGroovyMethods.java    License: Apache License 2.0 4 votes vote down vote up
private static String readLineFromReaderWithMark(final Reader input)
        throws IOException {
    char[] cbuf = new char[charBufferSize];
    try {
        input.mark(charBufferSize);
    } catch (IOException e) {
        // this should never happen
        LOG.warning("Caught exception setting mark on supporting reader: " + e);
        // fallback
        return readLineFromReaderWithoutMark(input);
    }

    // could be changed into do..while, but then
    // we might create an additional StringBuilder
    // instance at the end of the stream
    int count = input.read(cbuf);
    if (count == EOF) // we are at the end of the input data
        return null;

    StringBuilder line = new StringBuilder(expectedLineLength);
    // now work on the buffer(s)
    int ls = lineSeparatorIndex(cbuf, count);
    while (ls == -1) {
        line.append(cbuf, 0, count);
        count = input.read(cbuf);
        if (count == EOF) {
            // we are at the end of the input data
            return line.toString();
        }
        ls = lineSeparatorIndex(cbuf, count);
    }
    line.append(cbuf, 0, ls);

    // correct ls if we have \r\n
    int skipLS = 1;
    if (ls + 1 < count) {
        // we are not at the end of the buffer
        if (cbuf[ls] == '\r' && cbuf[ls + 1] == '\n') {
            skipLS++;
        }
    } else {
        if (cbuf[ls] == '\r' && input.read() == '\n') {
            skipLS++;
        }
    }

    //reset() and skip over last linesep
    input.reset();
    input.skip(line.length() + skipLS);
    return line.toString();
}
 
Example 20
Source Project: commons-jexl   File: TemplateEngine.java    License: Apache License 2.0 4 votes vote down vote up
/**
 * Read lines from a (buffered / mark-able) reader keeping all new-lines and line-feeds.
 * @param reader the reader
 * @return the line iterator
 */
protected static Iterator<CharSequence> readLines(final Reader reader) {
    if (!reader.markSupported()) {
        throw new IllegalArgumentException("mark support in reader required");
    }
    return new Iterator<CharSequence>() {
        private CharSequence next = doNext();

        private CharSequence doNext() {
            StringBuffer strb = new StringBuffer(64); // CSOFF: MagicNumber
            int c;
            boolean eol = false;
            try {
                while ((c = reader.read()) >= 0) {
                    if (eol) {// && (c != '\n' && c != '\r')) {
                        reader.reset();
                        break;
                    }
                    if (c == '\n') {
                        eol = true;
                    }
                    strb.append((char) c);
                    reader.mark(1);
                }
            } catch (IOException xio) {
                return null;
            }
            return strb.length() > 0 ? strb : null;
        }

        @Override
        public boolean hasNext() {
            return next != null;
        }

        @Override
        public CharSequence next() {
            CharSequence current = next;
            if (current != null) {
                next = doNext();
            }
            return current;
        }

        @Override
        public void remove() {
            throw new UnsupportedOperationException("Not supported.");
        }
    };
}