juzu.impl.io.CharStream Maven / Gradle / Ivy
/*
* Copyright 2013 eXo Platform SAS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package juzu.impl.io;
import juzu.io.OutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CoderResult;
import java.nio.charset.CodingErrorAction;
/** @author Julien Viet */
public abstract class CharStream extends OutputStream {
/** Charset. */
private final Charset charset;
/** Decoder. */
private CharsetDecoder decoder;
/** . */
private CharBuffer bb;
protected CharStream(Charset charset) {
this.charset = charset;
}
public void append(byte[] data) throws IOException {
append(data, 0, data.length);
}
public void append(byte[] data, int off, int len) throws IOException {
append(ByteBuffer.wrap(data, off, len));
}
public void append(ByteBuffer buffer) throws IOException {
if (buffer.hasRemaining()) {
if (decoder == null) {
decoder = charset.newDecoder().onUnmappableCharacter(CodingErrorAction.REPORT).onMalformedInput(CodingErrorAction.IGNORE);
bb = CharBuffer.allocate(BUFFER_SIZE);
} else {
decoder.reset();
}
while (true) {
CoderResult result ;
result = buffer.hasRemaining() ? decoder.decode(buffer, bb, true) : decoder.flush(bb);
if (result.isUnderflow() || result.isOverflow()) {
bb.flip();
if (bb.hasRemaining()) {
append(bb);
}
bb.clear();
if (result.isUnderflow()) {
if (buffer.remaining() > 0) {
throw new UnsupportedOperationException("We don't support this case yet");
} else {
break;
}
}
} else {
if (result.isUnmappable()) {
buffer.position(buffer.position() + result.length());
} else {
throw new UnsupportedOperationException("We don't support this case yet (2) " + result);
}
}
}
}
}
public void append(CharBuffer buffer) throws IOException {
append(buffer, buffer.arrayOffset() + buffer.position(), buffer.limit() - buffer.arrayOffset());
}
}