/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 com.facebook.thrift.transport;
import com.facebook.thrift.TByteArrayOutputStream;
import java.io.UnsupportedEncodingException;
/**
* Memory buffer-based implementation of the TTransport interface.
*
*/
public class TMemoryBuffer extends TTransport {
/**
*
*/
public TMemoryBuffer(int size) {
reset(size);
}
@Override
public boolean isOpen() {
return true;
}
@Override
public void open() {
/* Do nothing */
}
@Override
public void close() {
/* Do nothing */
}
@Override
public int read(byte[] buf, int off, int len) throws TTransportException {
byte[] src = arr_.get();
int amtToRead = (len > arr_.len() - pos_ ? arr_.len() - pos_ : len);
if (amtToRead > 0) {
System.arraycopy(src, pos_, buf, off, amtToRead);
pos_ += amtToRead;
}
return amtToRead;
}
@Override
public void write(byte[] buf, int off, int len) {
arr_.write(buf, off, len);
}
/**
* Output the contents of the memory buffer as a String, using the supplied
* encoding
* @param enc the encoding to use
* @return the contents of the memory buffer as a String
*/
public String toString(String enc) throws UnsupportedEncodingException {
return arr_.toString(enc);
}
public String inspect() {
String buf = "";
byte[] bytes = arr_.toByteArray();
for (int i = 0; i < bytes.length; i++) {
buf += (pos_ == i ? "==>" : "" ) + Integer.toHexString(bytes[i] & 0xff) + " ";
}
return buf;
}
// The contents of the buffer
private TByteArrayOutputStream arr_;
// Position to read next byte from
private int pos_;
public int length() {
return arr_.len();
}
public void reset(int size) {
arr_ = new TByteArrayOutputStream(size);
pos_ = 0;
}
public byte[] getArray() {
return arr_.get();
}
public int getArrayPos() {
return pos_;
}
}