Example usage for java.lang CharSequence charAt

Introduction

In this page you can find the example usage for java.lang CharSequence charAt.

Prototype

char charAt(int index);

Source Link

Document

Returns the char value at the specified index.

Usage

From source file:be.milieuinfo.core.proxy.controller.ProxyServlet.java

/**
 * <p>Encodes characters in the query or fragment part of the URI.
 *
 * <p>Unfortunately, an incoming URI sometimes has characters disallowed by the spec.  HttpClient
 * insists that the outgoing proxied request has a valid URI because it uses Java's {@link URI}. To be more
 * forgiving, we must escape the problematic characters.  See the URI class for the spec.
 *
 * @param in example: name=value&foo=bar#fragment
 *//* www .  ja  v a2  s.c o m*/
static CharSequence encodeUriQuery(CharSequence in) {
    //Note that I can't simply use URI.java to encode because it will escape pre-existing escaped things.
    StringBuilder outBuf = null;
    Formatter formatter = null;
    for (int i = 0; i < in.length(); i++) {
        char c = in.charAt(i);
        boolean escape = true;
        if (c < 128) {
            if (asciiQueryChars.get((int) c)) {
                escape = false;
            }
        } else if (!Character.isISOControl(c) && !Character.isSpaceChar(c)) {//not-ascii
            escape = false;
        }
        if (!escape) {
            if (outBuf != null)
                outBuf.append(c);
        } else {
            //escape
            if (outBuf == null) {
                outBuf = new StringBuilder(in.length() + 5 * 3);
                outBuf.append(in, 0, i);
                formatter = new Formatter(outBuf);
            }
            //leading %, 0 padded, width 2, capital hex
            formatter.format("%%%02X", (int) c);//TODO
        }
    }
    return outBuf != null ? outBuf : in;
}

From source file:com.tecapro.inventory.common.util.StringUtil.java

public static boolean isMobileNumber(final CharSequence cs) {

    final int seqLength = cs.length();

    if (seqLength == 0) {
        return false;
    }//from w w w.ja va2  s .c  o  m

    boolean hasMobiPrefix = false;
    char firstChar = cs.charAt(0);

    if (cs.charAt(0) == '8' && cs.charAt(1) == '4') { // two first digits are country code
        firstChar = cs.charAt(2);
    }

    for (int i = 0; i < Constants.MOBI_PREFIX.length; i++) {
        if (firstChar == Constants.MOBI_PREFIX[i]) {
            hasMobiPrefix = true;
            break;
        }
    }

    if (!hasMobiPrefix) {
        return false;
    }

    for (int i = 1; i < seqLength; i++) {
        if (!Character.isDigit(cs.charAt(i))) {
            return false;
        }
    }

    return true;
}

From source file:org.realityforge.proxy_servlet.AbstractProxyServlet.java

/**
 * Encodes characters in the query or fragment part of the URI.
 * <p/>/*  w  w  w .  j  a  v  a 2s  . c om*/
 * <p>Unfortunately, an incoming URI sometimes has characters disallowed by the spec.  HttpClient
 * insists that the outgoing proxied request has a valid URI because it uses Java's {@link java.net.URI}.
 * To be more forgiving, we must escape the problematic characters.  See the URI class for the
 * spec.
 *
 * @param in example: name=value&foo=bar#fragment
 */
private static CharSequence encodeUriQuery(final CharSequence in) {
    //Note that I can't simply use URI.java to encode because it will escape pre-existing escaped things.
    StringBuilder sb = null;
    Formatter formatter = null;
    for (int i = 0; i < in.length(); i++) {
        char c = in.charAt(i);
        boolean escape = true;
        if (c < MAX_ASCII_VALUE) {
            if (ASCII_QUERY_CHARS.get((int) c)) {
                escape = false;
            }
        } else if (!Character.isISOControl(c) && !Character.isSpaceChar(c)) {
            //not-ascii
            escape = false;
        }
        if (!escape) {
            if (null != sb) {
                sb.append(c);
            }
        } else {
            //escape
            if (null == sb) {
                final int formatLength = 5 * 3;
                sb = new StringBuilder(in.length() + formatLength);
                sb.append(in, 0, i);
                formatter = new Formatter(sb);
            }
            //leading %, 0 padded, width 2, capital hex
            formatter.format("%%%02X", (int) c);
        }
    }
    return sb != null ? sb : in;
}

From source file:uk.ac.ebi.phenotype.web.proxy.ExternalUrlConfiguratbleProxyServlet.java

/**
 * <p>//from   w  w w.j  a  va 2s .  c om
 * Encodes characters in the query or fragment part of the URI.
 * 
 * <p>
 * Unfortunately, an incoming URI sometimes has characters disallowed by the
 * spec. HttpClient insists that the outgoing proxied request has a valid
 * URI because it uses Java's {@link URI}. To be more forgiving, we must
 * escape the problematic characters. See the URI class for the spec.
 * 
 * @param in
 *            example: name=value&foo=bar#fragment
 */
static CharSequence encodeUriQuery(CharSequence in) {
    // Note that I can't simply use URI.java to encode because it will
    // escape pre-existing escaped things.
    StringBuilder outBuf = null;
    Formatter formatter = null;
    for (int i = 0; i < in.length(); i++) {
        char c = in.charAt(i);
        boolean escape = true;
        if (c < 128) {
            if (asciiQueryChars.get((int) c)) {
                escape = false;
            }
        } else if (!Character.isISOControl(c) && !Character.isSpaceChar(c)) {// not-ascii
            escape = false;
        }
        if (!escape) {
            if (outBuf != null)
                outBuf.append(c);
        } else {
            // escape
            if (outBuf == null) {
                outBuf = new StringBuilder(in.length() + 5 * 3);
                outBuf.append(in, 0, i);
                formatter = new Formatter(outBuf);
            }
            // leading %, 0 padded, width 2, capital hex
            formatter.format("%%%02X", (int) c);// TODO
        }
    }
    return outBuf != null ? outBuf : in;
}

From source file:org.artifactory.util.PathUtils.java

public static CharSequence trimLeadingSlashChars(CharSequence path) {
    if (path == null) {
        return null;
    }//from   w  ww  . j  av a2s.c  o m
    //Trim leading '/' (caused by webdav requests)
    if (path.length() > 0 && path.charAt(0) == '/') {
        path = path.subSequence(1, path.length());
        return trimLeadingSlashChars(path);
    }
    return path;
}

From source file:edu.cornell.med.icb.goby.reads.ColorSpaceConverter.java

/**
 * Converts a sequence into the equivalent sequence in color space.
 *
 * @param input  The sequence to be converted
 * @param output where the converted sequence should be placed
 * @param anyN   if true, converts color space codes larger or equal to 4 to 'N' characters.
 *///  www  .j a  v  a 2 s  . c  o  m
public static void convert(final CharSequence input, final MutableString output, final boolean anyN) {
    assert output != null : "The output location must not be null";

    output.setLength(0);
    if (input != null) {
        int position = 0;
        final int length = input.length() - 1; // -1 since we enumerate digrams
        if (input.length() > 0) {

            output.setLength(position + 1);
            output.setCharAt(position++, input.charAt(0));
        }
        for (int index = 0; index < length; ++index) {
            final char code = Character.forDigit(getColorCode(input.charAt(index), input.charAt(index + 1)),
                    10);
            output.setLength(position + 1);
            output.setCharAt(position++, (code >= '4') ? (anyN ? 'N' : code) : code);
        }
        output.setLength(position);
    }
}

From source file:org.jets3t.service.utils.SignatureUtils.java

/**
 * Slightly modified version of "uri-encode" from:
 * {@link "http://docs.aws.amazon.com/AmazonS3/latest/API/sig-v4-header-based-auth.html"}
 *
 * @param input/*from ww w  .jav  a  2 s.co  m*/
 * URI or URI-fragment string to encode.
 * @param encodeSlash
 * true if slash (/) character should be encoded.
 * @return URI string encoded per recommendations from AWS.
 */
public static String awsV4EncodeURI(CharSequence input, boolean encodeSlash) {
    StringBuilder result = new StringBuilder();
    for (int i = 0; i < input.length(); i++) {
        char ch = input.charAt(i);
        if ((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z') || (ch >= '0' && ch <= '9') || ch == '_'
                || ch == '-' || ch == '~' || ch == '.') {
            result.append(ch);
        } else if (ch == '/') {
            result.append(encodeSlash ? "%2F" : ch);
        } else {
            String hex = RestUtils.encodeUrlString(String.valueOf(ch));
            result.append(hex);
        }
    }
    return result.toString();
}

From source file:jp.co.ctc_g.jse.core.validation.util.Validators.java

/**
 * ????'\u0020'?'\u007e'??????????//from w  w  w  . ja  v a  2s  .c om
 * @param suspect 
 * @return ???true
 */
public static boolean isASCII(CharSequence suspect) {
    for (int i = 0; i < suspect.length(); i++) {
        char c = suspect.charAt(i);
        if (c < '\u0020' || c > '\u007e') {
            return false;
        }
    }
    return true;
}

From source file:com.dnw.json.J.java

/**
 * Escapes each character to make the string can be denoted as a JSON string.
 * //from ww w.  j a v  a 2  s. c  o  m
 * @author manbaum
 * @since Oct 11, 2014
 * @param text a string to have all characters to be escaped.
 * @return the escaped string.
 */
private final static String escape(final CharSequence text) {
    final StringBuffer sb = new StringBuffer();
    for (int i = 0; i < text.length(); i++) {
        char ch = text.charAt(i);
        if (ch == 0) {
            sb.append("\\0");
        } else if (ch == '\n') {
            sb.append("\\n");
        } else if (ch == '\r') {
            sb.append("\\r");
        } else if (ch < 32) {
            sb.append("\\x");
            if (ch < 16) {
                sb.append('0');
            }
            sb.append(Integer.toHexString(ch));
        } else if (ch == '\\' || ch == '\'' || ch == '\"') {
            sb.append("\\");
            sb.append(ch);
        } else if (ch <= 126) {
            sb.append(ch);
        } else {
            int n = Character.codePointAt(text, i);
            sb.append("\\u");
            if (n < 16) {
                sb.append("000");
            } else if (n < 256) {
                sb.append("00");
            } else if (n < 4096) {
                sb.append("0");
            }
            sb.append(Integer.toHexString(n));
        }
    }
    return sb.toString();
}

From source file:org.apache.sshd.common.util.net.SshdSocketAddress.java

/**
 * <P>Checks if the provided argument is a valid IPv4 address component:</P></BR>
 * <UL>/*from  w  w w.j av a2 s .  c  om*/
 *     <LI>Not {@code null}/empty</LI>
 *     <LI>Has at most 3 <U>digits</U></LI>
 *     <LI>Its value is &le; 255</LI>
 * </UL>
 * @param c The {@link CharSequence} to be validate
 * @return {@code true} if valid IPv4 address component
 */
public static boolean isValidIPv4AddressComponent(CharSequence c) {
    if (GenericUtils.isEmpty(c) || (c.length() > 3)) {
        return false;
    }

    char ch = c.charAt(0);
    if ((ch < '0') || (ch > '9')) {
        return false;
    }

    if (!NumberUtils.isIntegerNumber(c)) {
        return false;
    }

    int v = Integer.parseInt(c.toString());
    return (v >= 0) && (v <= 255);
}