/*
* Copyright (C) 2007 Steve Ratcliffe
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*
* Author: Steve Ratcliffe
* Create date: 14-Jan-2007
*/
package uk.me.parabola.imgfmt.app.labelenc;
import java.nio.charset.Charset;
import uk.me.parabola.log.Logger;
/**
* Useful routines for the other encoders.
* Provides some default behaviour when a conversion is not possible for
* example.
*
* @author Steve Ratcliffe
*/
public class BaseEncoder {
private static final Logger log = Logger.getLogger(BaseEncoder.class);
public static final EncodedText NO_TEXT = new EncodedText(null, 0, null);
private boolean charsetSupported = true;
// Whether to uppercase the labels or not. Default is true because many
// GPS devices do not display labels in lower case.
private boolean upperCase;
protected boolean isCharsetSupported() {
return charsetSupported;
}
protected void prepareForCharacterSet(String name) {
if (Charset.isSupported(name)) {
charsetSupported = true;
} else {
charsetSupported = false;
log.warn("requested character set not found " + name);
}
}
protected EncodedText simpleEncode(String text) {
if (text == null)
return NO_TEXT;
char[] in = text.toCharArray();
byte[] out = new byte[in.length + 1];
int off = 0;
for (char c : in)
out[off++] = (byte) (c & 0xff);
return new EncodedText(out, out.length, in);
}
public boolean isUpperCase() {
return upperCase;
}
public void setUpperCase(boolean upperCase) {
this.upperCase = upperCase;
}
}