Свернуть ↑ package l2p.util;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PushbackInputStream;
import java.io.Reader;

/**
* Generic unicode textreader, which will use BOM mark
* to identify the encoding to be used. If BOM is not found
* then use a given default encoding.
* System default is used if:
* BOM mark is not found and defaultEnc is NULL
*
* Usage pattern:
String defaultEnc = "ISO-8859-1"; // or NULL to use system default
FileInputStream fis = new FileInputStream(file);
Reader in = new UnicodeReader(fis, defaultEnc);
*/
public class UnicodeReader extends Reader
{
PushbackInputStream internalIn;
InputStreamReader internalIn2 = null;
String defaultEnc;

private static final int BOM_SIZE = 4;

UnicodeReader(InputStream in, String defaultEnc)
{
internalIn = new PushbackInputStream(in, BOM_SIZE);
this.defaultEnc = defaultEnc;
}

public String getDefaultEncoding()
{
return defaultEnc;
}

public String getEncoding()
{
if(internalIn2 == null)
return null;
return internalIn2.getEncoding();
}

/**
* Read-ahead four bytes and check for BOM marks. Extra bytes are
* unread back to the stream, only BOM bytes are skipped.
*/
protected void init() throws IOException
{
if(internalIn2 != null)
return;

String encoding;
byte bom[] = new byte[BOM_SIZE];
int n, unread;
n = internalIn.read(bom, 0, bom.length);

if(bom[0] == (byte) 0xEF && bom[1] == (byte) 0xBB && bom[2] == (byte) 0xBF)
{
encoding = "UTF-8";
unread = n - 3;
}
else if(bom[0] == (byte) 0xFE && bom[1] == (byte) 0xFF)
{
encoding = "UTF-16BE";
unread = n - 2;
}
else if(bom[0] == (byte) 0xFF && bom[1] == (byte) 0xFE)
{
encoding = "UTF-16LE";
unread = n - 2;
}
else if(bom[0] == (byte) 0x00 && bom[1] == (byte) 0x00 && bom[2] == (byte) 0xFE && bom[3] == (byte) 0xFF)
{
encoding = "UTF-32BE";
unread = n - 4;
}
else if(bom[0] == (byte) 0xFF && bom[1] == (byte) 0xFE && bom[2] == (byte) 0x00 && bom[3] == (byte) 0x00)
{
encoding = "UTF-32LE";
unread = n - 4;
}
else
{
// Unicode BOM mark not found, unread all bytes
encoding = defaultEnc;
unread = n;
}
// System.out.println("read=" + n + ", unread=" + unread);

if(unread > 0)
internalIn.unread(bom, (n - unread), unread);

// Use given encoding
if(encoding == null)
internalIn2 = new InputStreamReader(internalIn);
else
internalIn2 = new InputStreamReader(internalIn, encoding);
}

@Override
public void close() throws IOException
{
init();
internalIn2.close();
}

@Override
public int read(char[] cbuf, int off, int len) throws IOException
{
init();
return internalIn2.read(cbuf, off, len);
}

}

Свернуть ↑ Подгрузку геодаты в инстанс и оптимизированный геодвиг для фени.. :negodue: