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/*
* 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 org.apache.thrift.transport;
import org.apache.thrift.TConfiguration;
public final class TMemoryInputTransport extends TEndpointTransport {
private byte[] buf_;
private int pos_;
private int endPos_;
public TMemoryInputTransport() throws TTransportException {
this(new TConfiguration());
}
public TMemoryInputTransport(TConfiguration _configuration) throws TTransportException {
this(_configuration, new byte[0]);
}
public TMemoryInputTransport(byte[] buf) throws TTransportException {
this(new TConfiguration(), buf);
}
public TMemoryInputTransport(TConfiguration _configuration, byte[] buf) throws TTransportException {
this(_configuration, buf, 0, buf.length);
}
public TMemoryInputTransport(byte[] buf, int offset, int length) throws TTransportException {
this(new TConfiguration(), buf, offset, length);
}
public TMemoryInputTransport(TConfiguration _configuration, byte[] buf, int offset, int length) throws TTransportException {
super(_configuration);
reset(buf, offset, length);
updateKnownMessageSize(length);
}
public void reset(byte[] buf) {
reset(buf, 0, buf.length);
}
public void reset(byte[] buf, int offset, int length) {
buf_ = buf;
pos_ = offset;
endPos_ = offset + length;
try {
resetConsumedMessageSize(-1);
} catch (TTransportException e) {
// ignore
}
}
public void clear() {
buf_ = null;
try {
resetConsumedMessageSize(-1);
} catch (TTransportException e) {
// ignore
}
}
@Override
public void close() {}
@Override
public boolean isOpen() {
return true;
}
@Override
public void open() throws TTransportException {}
@Override
public int read(byte[] buf, int off, int len) throws TTransportException {
int bytesRemaining = getBytesRemainingInBuffer();
int amtToRead = (len > bytesRemaining ? bytesRemaining : len);
if (amtToRead > 0) {
System.arraycopy(buf_, pos_, buf, off, amtToRead);
consumeBuffer(amtToRead);
countConsumedMessageBytes(amtToRead);
}
return amtToRead;
}
@Override
public void write(byte[] buf, int off, int len) throws TTransportException {
throw new UnsupportedOperationException("No writing allowed!");
}
@Override
public byte[] getBuffer() {
return buf_;
}
public int getBufferPosition() {
return pos_;
}
public int getBytesRemainingInBuffer() {
return endPos_ - pos_;
}
public void consumeBuffer(int len) {
pos_ += len;
}
}
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