Examples of java.nio.charset.CharsetEncoder.encode()

java.nio.charset.CharsetEncoder.encode()
This is a facade method for encoding operation.
This method encodes the remaning character sequence of the given character buffer into a new byte buffer. This method performs a complete encoding operation, resets at first, then encodes, and flushes at last.

This method should not be invoked if another encode operation is ongoing.
@param in the input buffer @return a new ByteBuffer containing the the bytes producedby this encoding operation. The buffer's limit will be the position of last byte in buffer, and the position will be zero @throws IllegalStateException if another encoding operation is ongoing @throws MalformedInputException if illegal input character sequence for this charset encountered, and the action for malformed error is {@link CodingErrorAction#REPORT CodingErrorAction.REPORT} @throws UnmappableCharacterException if legal but unmappable input character sequence for this charset encountered, and the action for unmappable character error is {@link CodingErrorAction#REPORT CodingErrorAction.REPORT}. Unmappable means the Unicode character sequence at the input buffer's current postion cannot be mapped to a equivalent byte sequence. @throws CharacterCodingException if other exception happened during the encode operation

        CharBuffer inBuf = CharBuffer.allocate(in.length);
        inBuf.put(in);
        CharsetEncoder encoder = cs.newEncoder();
        ByteBuffer outBuf = ByteBuffer.allocate(in.length*4+4);
        inBuf.rewind();
        encoder.encode(inBuf, outBuf, true);
        outBuf.rewind();
        if(outBuf.get(0)!= (byte)0x00 && outBuf.get(1)!= (byte)0x00 && 
                outBuf.get(2)!= (byte)0xFF && outBuf.get(3)!= (byte)0xFE){
            errln("The UTF32 encoder did not appended bom. Length returned: " + outBuf.remaining());
        }

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        };
        ByteBuffer bb = ByteBuffer.wrap(byteout);
        CharBuffer cb = CharBuffer.wrap(charin);
        CharBuffer cb2 = CharBuffer.wrap(cb.subSequence(0, 2));
        encoder.reset();
        if (!(encoder.encode(cb2, bb, true)).isOverflow()) {
            errln("Overflow error while encoding ASCII should have occurred.");
        }
    }
    //Test CharsetUTF7
    public void TestCharsetUTF7() {

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        ccbs.limit(ccbs.position());
        ccbs.position(0);
        ccus.limit(ccus.position());
        ccus.position(0);
        
        result = encoder.encode(ccus, ccbs, true);
        result = encoder.flush(ccbs);
        if (!result.isOverflow()) {
            errln("Overflow buffer while encoding UTF-7 should have occurred.");
        }
        //end of charset encoder code coverage code

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        bs.limit(bs.position());
        bs.position(0);
        us.limit(us.position());
        us.position(0);
        
        result = encoder.encode(us, bs, true);
        
        if (!result.isError() && !result.isOverflow()) {
            errln("Error while encoding UTF32LE (2) should have occurred.");
        }

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        bs.limit(bs.position());
        bs.position(0);
        us.limit(us.position());
        us.position(0);
        
        result = encoder.encode(us, bs, true);
        
        if (!result.isError() && !result.isOverflow()) {
            errln("Error while encoding UTF32LE (3) should have occurred.");
        }

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        us.limit(1);
        us.position(0);
        bs.limit(1);
        bs.position(0);
       
        result = encoder.encode(us, bs, true);
        
        if (!result.isMalformed()) {
            // LE should not output BOM, so this should be malformed 
            errln("Malformed while encoding UTF-16LE (1) should have occured.");
        }

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        us.limit(4);
        us.position(1);
        bs.limit(7);
        bs.position(1);
        
        result = encoder.encode(us, bs, true);
        
        if (!result.isMalformed()) {
            errln("Error while encoding UTF-16LE (2) should have occured.");
        }

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        us.limit(1);
        us.position(0);
        bs.limit(1);
        bs.position(0);
       
        result = encoder.encode(us, bs, true);    
        
        us.limit(6);
        us.position(4);
        bs.limit(4);
        bs.position(1);

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        us.limit(6);
        us.position(4);
        bs.limit(4);
        bs.position(1);
        
        result = encoder.encode(us, bs, true);
        
        if (!result.isMalformed()) {
            errln("Error while encoding UTF-16LE (3) should have occured.");
        }          
    }

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        us.limit(us.position());
        us.position(0);
        bs.limit(bs.position());
        bs.position(0);
        
        result = encoder.encode(us, bs, true);
        // must try to output BOM first for UTF-32 (not UTF-32BE or UTF-32LE)
        if (!result.isOverflow()) {
            errln("Buffer overflow error while encoding UTF32 charset (1) should have occurred."); 
        }

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