com.facebook.presto.hive.$internal.jodd.io.CharBufferReader Maven / Gradle / Ivy
// Copyright (c) 2003-2014, Jodd Team (com.facebook.presto.hive.$internal.jodd.org). All Rights Reserved.
package com.facebook.presto.hive.$internal.jodd.io;
import java.io.IOException;
import java.io.Reader;
import java.nio.CharBuffer;
/**
* Reader that wraps a CharBuffer.
*/
public class CharBufferReader extends Reader {
private final CharBuffer charBuffer;
public CharBufferReader(CharBuffer charBuffer) {
// duplicate so to allow to move independently,
// but share the same underlying data.
this.charBuffer = charBuffer.duplicate();
}
@Override
public int read(char[] chars, int offset, int length) throws IOException {
int read = Math.min(charBuffer.remaining(), length);
charBuffer.get(chars, offset, read);
return read;
}
@Override
public int read() throws IOException {
return charBuffer.position() < charBuffer.limit() ? charBuffer.get() : -1;
}
@Override
public void close() throws IOException {
}
}