Example usage for com.itextpdf.tool.xml.parser.io EncodingUtil getDeclaredEncoding

Introduction

In this page you can find the example usage for com.itextpdf.tool.xml.parser.io EncodingUtil getDeclaredEncoding.

Prototype

public static String getDeclaredEncoding(final String decl) 

Source Link

Usage

From source file:pdfreader.XMLParser.java

License:Open Source License

/**
 * Detects encoding from a stream.//from  w  w  w  .ja  v a2 s.co m
 *
 * @param in the stream
 * @return a Reader with the deduced encoding.
 * @throws IOException                  if IO went wrong
 * @throws UnsupportedEncodingException if unsupported encoding was detected
 */
public InputStreamReader detectEncoding(final InputStream in) throws IOException, UnsupportedEncodingException {
    // we expect a '>' in the first 100 characters
   in.mark(1028);
   byte b4[] = new byte[4];
    int count = in.read(b4);
    if (count != 4)
        throw new IOException("Insufficient length");
    String encoding = XMLUtil.getEncodingName(b4);
    String decl = null;
    if (encoding.equals("UTF-8")) {
        StringBuffer sb = new StringBuffer();
        int c;
        while ((c = in.read()) != -1) {
            if (c == '>')
                break;
            sb.append((char) c);
        }
        decl = sb.toString();
    } else if (encoding.equals("CP037")) {
        ByteArrayOutputStream bi = new ByteArrayOutputStream();
        int c;
        while ((c = in.read()) != -1) {
            if (c == 0x6e) // that's '>' in ebcdic
                break;
            bi.write(c);
        }
        decl = new String(bi.toByteArray(), "CP037");
    }
    if (decl != null) {
        decl = EncodingUtil.getDeclaredEncoding(decl);
        if (decl != null)
            encoding = decl;
    }
    in.reset();
    return new InputStreamReader(in, IanaEncodings.getJavaEncoding(encoding));
}

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