Examples of java.nio.charset.CoderResult

java.nio.charset.CoderResult
Used to indicate the result of encoding/decoding. There are four types of results:
1. UNDERFLOW indicates all input has been processed, or more input is required. It is represented by the unique object CoderResult.UNDERFLOW.
2. OVERFLOW indicates insufficient output buffer. It is represented by the unique object CoderResult.OVERFLOW.
3. A malformed-input error indicates an unrecognizable sequence of input units has been encountered. Get an instance of this type of result by calling CoderResult.malformedForLength(int) with the length of the malformed-input.
4. An unmappable-charactor error indicates a sequence of input units can not be mapped to the output charset. Get an instance of this type of result by calling CoderResult.unmappableForLength(int) with the input sequence size indicating the identity of the unmappable character.


            int expectedLength = (int) ( buf.remaining() * decoder.averageCharsPerByte() ) + 1;
            CharBuffer out = CharBuffer.allocate( expectedLength );
            for( ;; )
            {
                CoderResult cr;
                if ( buf.hasRemaining() )
                {
                    cr = decoder.decode( buf, out, true );
                }
                else
                {
                    cr = decoder.flush( out );
                }
                
                if ( cr.isUnderflow() )
                {
                    break;
                }
                
                if ( cr.isOverflow() )
                {
                    CharBuffer o = CharBuffer.allocate( out.capacity() + expectedLength );
                    out.flip();
                    o.put(out);
                    out = o;
                    continue;
                }


                cr.throwException();
            }
            
            buf.limit( oldLimit );
            buf.position( end );
            return out.flip().toString();

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            int expectedLength = (int) ( buf.remaining() * decoder.averageCharsPerByte() ) + 1;
            CharBuffer out = CharBuffer.allocate( expectedLength );
            for( ;; )
            {
                CoderResult cr;
                if ( buf.hasRemaining() )
                {
                    cr = decoder.decode( buf, out, true );
                }
                else
                {
                    cr = decoder.flush( out );
                }
                
                if ( cr.isUnderflow() )
                {
                    break;
                }
                
                if ( cr.isOverflow() )
                {
                    CharBuffer o = CharBuffer.allocate( out.capacity() + expectedLength );
                    out.flip();
                    o.put(out);
                    out = o;
                    continue;
                }


                cr.throwException();
            }
            
            buf.limit( oldLimit );
            buf.position( end );
            return out.flip().toString();

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            CharBuffer in = CharBuffer.wrap( val ); 
            buf.limit( end );
            encoder.reset();


            for (;;) {
                CoderResult cr;
                if( in.hasRemaining() )
                {
                    cr = encoder.encode( in, buf(), true );
                }
                else
                {
                    cr = encoder.flush( buf() );
                }
                
                if( cr.isUnderflow() || cr.isOverflow() )
                {
                    break;
                }
                cr.throwException();
            }


            buf.limit( oldLimit );


            if( buf.position() < end )

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            int expectedLength = (int) (in.remaining() * encoder.averageBytesPerChar()) + 1;


            encoder.reset();


            for (;;) {
                CoderResult cr;
                if( in.hasRemaining() )
                {
                    cr = encoder.encode( in, buf(), true );
                }
                else
                {
                    cr = encoder.flush( buf() );
                }
                
                if( cr.isUnderflow() )
                {
                    break;
                }
                if( cr.isOverflow() && autoExpand )
                {
                    autoExpand( expectedLength );
                    continue;
                }
                cr.throwException();
            }
            return this;
        }

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        decodeAndWriteBuffered(writer, in, out, decoder, endOfInput);
    }


    private static void decodeAndWriteBuffered(Writer writer, ByteBuffer in, CharBuffer out, CharsetDecoder decoder, boolean endOfInput) throws IOException {
        // Decode
        CoderResult result;
        do {
            result = decodeAndWrite(writer, in, out, decoder, endOfInput);
            // Check that all data are decoded
            if (in.hasRemaining()) {
                // Move remaining to top of buffer
                in.compact();
                if (result.isOverflow() && !result.isError() && !result.isMalformed()) {
                    // Not all buffer chars decoded, spin it again
                    // Set to begin
                    in.flip();
                }
            } else {
                // Clean up buffer
                in.clear();
            }
        } while (in.hasRemaining() && result.isOverflow() && !result.isError() && !result.isMalformed());
    }

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            }
        } while (in.hasRemaining() && result.isOverflow() && !result.isError() && !result.isMalformed());
    }


    private static CoderResult decodeAndWrite(Writer writer, ByteBuffer in, CharBuffer out, CharsetDecoder decoder, boolean endOfInput) throws IOException {
        CoderResult result = decoder.decode(in, out, endOfInput);
        // To begin of decoded data
        out.flip();
        // Output
        writer.write(out.toString());
        return result;

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            if (bytesRead <= 0) {
                break;
            }
            this.bbuf.flip();
            final boolean completed = decoder.isCompleted();
            CoderResult result = this.chardecoder.decode(this.bbuf, this.cbuf, completed);
            handleDecodingResult(result, ioctrl);
            this.bbuf.compact();
            if (completed) {
                result = this.chardecoder.flush(this.cbuf);
                handleDecodingResult(result, ioctrl);

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            return;
        }
        bb.flip();
        cd.reset();
        if (bb.hasRemaining()) {
            CoderResult cr = cd.decode(bb, cb, true);
            cd.flush(cb);
            if (cr.isMalformed()) {
                // Move the tail bytes to the head
                int tailLength = bb.remaining();
                if (tailLength >= MALFORMED_INPUT_MAX_LENGTH) {
                    // We only expect the bytes of one character to be broken
                    throw new MalformedInputException(tailLength);

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        decoder.reset();


        int expectedLength = (int) (remaining() * decoder.averageCharsPerByte()) + 1;
        CharBuffer out = CharBuffer.allocate(expectedLength);
        for (;;) {
            CoderResult cr;
            if (hasRemaining()) {
                cr = decoder.decode(buf(), out, true);
            } else {
                cr = decoder.flush(out);
            }


            if (cr.isUnderflow()) {
                break;
            }


            if (cr.isOverflow()) {
                CharBuffer o = CharBuffer.allocate(out.capacity()
                        + expectedLength);
                out.flip();
                o.put(out);
                out = o;
                continue;
            }


            if (cr.isError()) {
                // Revert the buffer back to the previous state.
                limit(oldLimit);
                position(oldPos);
                cr.throwException();
            }
        }


        limit(oldLimit);
        position(newPos);

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        decoder.reset();


        int expectedLength = (int) (remaining() * decoder.averageCharsPerByte()) + 1;
        CharBuffer out = CharBuffer.allocate(expectedLength);
        for (;;) {
            CoderResult cr;
            if (hasRemaining()) {
                cr = decoder.decode(buf(), out, true);
            } else {
                cr = decoder.flush(out);
            }


            if (cr.isUnderflow()) {
                break;
            }


            if (cr.isOverflow()) {
                CharBuffer o = CharBuffer.allocate(out.capacity()
                        + expectedLength);
                out.flip();
                o.put(out);
                out = o;
                continue;
            }


            if (cr.isError()) {
                // Revert the buffer back to the previous state.
                limit(oldLimit);
                position(oldPos);
                cr.throwException();
            }
        }


        limit(oldLimit);
        position(end);

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