Example usage for java.nio.charset CoderResult throwException

Introduction

In this page you can find the example usage for java.nio.charset CoderResult throwException.

Prototype

public void throwException() throws CharacterCodingException 

Source Link

Document

Throws an exception appropriate to the result described by this object.

Usage

From source file:com.google.flatbuffers.Table.java

/**
 * Create a Java `String` from UTF-8 data stored inside the FlatBuffer.
 *
 * This allocates a new string and converts to wide chars upon each access,
 * which is not very efficient. Instead, each FlatBuffer string also comes with an
 * accessor based on __vector_as_bytebuffer below, which is much more efficient,
 * assuming your Java program can handle UTF-8 data directly.
 *
 * @param offset An `int` index into the Table's ByteBuffer.
 * @return Returns a `String` from the data stored inside the FlatBuffer at `offset`.
 *//*from   w ww  . j  a va  2s.  c  o  m*/
protected String __string(int offset) {
    CharsetDecoder decoder = UTF8_DECODER.get();
    decoder.reset();

    offset += bb.getInt(offset);
    ByteBuffer src = bb.duplicate().order(ByteOrder.LITTLE_ENDIAN);
    int length = src.getInt(offset);
    src.position(offset + SIZEOF_INT);
    src.limit(offset + SIZEOF_INT + length);

    int required = (int) ((float) length * decoder.maxCharsPerByte());
    CharBuffer dst = CHAR_BUFFER.get();
    if (dst == null || dst.capacity() < required) {
        dst = CharBuffer.allocate(required);
        CHAR_BUFFER.set(dst);
    }

    dst.clear();

    try {
        CoderResult cr = decoder.decode(src, dst, true);
        if (!cr.isUnderflow()) {
            cr.throwException();
        }
    } catch (CharacterCodingException x) {
        throw new Error(x);
    }

    return dst.flip().toString();
}

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From source file:org.codehaus.groovy.grails.web.util.StreamByteBuffer.java

public String readAsString(Charset charset) throws CharacterCodingException {
    int unreadSize = totalBytesUnread();
    if (unreadSize > 0) {
        CharsetDecoder decoder = charset.newDecoder().onMalformedInput(CodingErrorAction.REPLACE)
                .onUnmappableCharacter(CodingErrorAction.REPLACE);
        CharBuffer charbuffer = CharBuffer.allocate(unreadSize);
        ByteBuffer buf = null;// w w  w.  j a  va2  s .  c o m
        while (prepareRead() != -1) {
            buf = currentReadChunk.readToNioBuffer();
            boolean endOfInput = (prepareRead() == -1);
            CoderResult result = decoder.decode(buf, charbuffer, endOfInput);
            if (endOfInput) {
                if (!result.isUnderflow()) {
                    result.throwException();
                }
            }
        }
        CoderResult result = decoder.flush(charbuffer);
        if (buf.hasRemaining()) {
            throw new IllegalStateException("There's a bug here, buffer wasn't read fully.");
        }
        if (!result.isUnderflow()) {
            result.throwException();
        }
        charbuffer.flip();
        String str;
        if (charbuffer.hasArray()) {
            int len = charbuffer.remaining();
            char[] ch = charbuffer.array();
            if (len != ch.length) {
                ch = ArrayUtils.subarray(ch, 0, len);
            }
            str = StringCharArrayAccessor.createString(ch);
        } else {
            str = charbuffer.toString();
        }
        return str;
    }
    return null;
}

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