@JRubyMethod
public IRubyObject convert(ThreadContext context, IRubyObject srcBuffer) {
if (!(srcBuffer instanceof RubyString)) {
throw context.runtime.newTypeError(srcBuffer, context.runtime.getString());
}
RubyString srcString = (RubyString) srcBuffer;
ByteList srcBL = srcString.getByteList();
if (srcBL.getRealSize() == 0) return context.runtime.newSymbol("source_buffer_empty");
ByteBuffer srcBB = ByteBuffer.wrap(srcBL.getUnsafeBytes(), srcBL.begin(), srcBL.getRealSize());
try {
CharBuffer srcCB =
CharBuffer.allocate((int) (srcDecoder.maxCharsPerByte() * srcBL.getRealSize()) + 1);
CoderResult decodeResult = srcDecoder.decode(srcBB, srcCB, true);
srcCB.flip();
ByteBuffer destBB =
ByteBuffer.allocate((int) (destEncoder.maxBytesPerChar() * srcCB.limit()) + 1);
CoderResult encodeResult = destEncoder.encode(srcCB, destBB, true);
destBB.flip();
byte[] destBytes = new byte[destBB.limit()];
destBB.get(destBytes);
srcDecoder.reset();
destEncoder.reset();
return context.runtime.newString(new ByteList(destBytes, destEncoding.getEncoding(), false));
} catch (Exception e) {
throw context.runtime.newRuntimeError(e.getLocalizedMessage());
}
}
@JRubyMethod(visibility = PRIVATE)
public IRubyObject initialize(ThreadContext context, IRubyObject src, IRubyObject dest) {
if (src instanceof RubyEncoding) {
srcEncoding = (RubyEncoding) src;
} else {
srcEncoding = (RubyEncoding) context.runtime.getEncodingService().rubyEncodingFromObject(src);
}
if (dest instanceof RubyEncoding) {
destEncoding = (RubyEncoding) dest;
} else {
destEncoding =
(RubyEncoding) context.runtime.getEncodingService().rubyEncodingFromObject(dest);
}
try {
srcDecoder =
context
.runtime
.getEncodingService()
.charsetForEncoding(srcEncoding.getEncoding())
.newDecoder();
destEncoder =
context
.runtime
.getEncodingService()
.charsetForEncoding(destEncoding.getEncoding())
.newEncoder();
} catch (RaiseException e) {
if (e.getException().getMetaClass().getBaseName().equals("CompatibilityError")) {
throw context.runtime.newConverterNotFoundError(
"code converter not found (" + srcEncoding + " to " + destEncoding + ")");
} else {
throw e;
}
}
return context.runtime.getNil();
}