package org.infinispan.marshall;
import org.infinispan.io.ByteBuffer;
import org.infinispan.io.ExposedByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
/**
* Abstract Marshaller implementation containing shared implementations.
*
* @author Galder Zamarreño
* @since 4.1
*/
public abstract class AbstractMarshaller implements Marshaller {
protected static final int DEFAULT_BUF_SIZE = 512;
/**
* This is a convenience method for converting an object into a {@link org.infinispan.io.ByteBuffer} which takes
* an estimated size as parameter. A {@link org.infinispan.io.ByteBuffer} allows direct access to the byte
* array with minimal array copying
*
* @param o object to marshall
* @param estimatedSize an estimate of how large the resulting byte array may be
* @return a ByteBuffer
* @throws Exception
*/
protected abstract ByteBuffer objectToBuffer(Object o, int estimatedSize) throws IOException, InterruptedException;
@Override
public ByteBuffer objectToBuffer(Object obj) throws IOException, InterruptedException {
return objectToBuffer(obj, DEFAULT_BUF_SIZE);
}
@Override
public byte[] objectToByteBuffer(Object o) throws IOException, InterruptedException {
return objectToByteBuffer(o, DEFAULT_BUF_SIZE);
}
@Override
public byte[] objectToByteBuffer(Object obj, int estimatedSize) throws IOException, InterruptedException {
ByteBuffer b = objectToBuffer(obj, estimatedSize);
byte[] bytes = new byte[b.getLength()];
System.arraycopy(b.getBuf(), b.getOffset(), bytes, 0, b.getLength());
return bytes;
}
@Override
public Object objectFromByteBuffer(byte[] buf) throws IOException, ClassNotFoundException {
return objectFromByteBuffer(buf, 0, buf.length);
}
/**
* This method implements {@link StreamingMarshaller#objectFromInputStream(java.io.InputStream)}, but its
* implementation has been moved here rather that keeping under a class that implements StreamingMarshaller
* in order to avoid code duplication.
*/
public Object objectFromInputStream(InputStream inputStream) throws IOException, ClassNotFoundException {
int len = inputStream.available();
ExposedByteArrayOutputStream bytes = new ExposedByteArrayOutputStream(len);
byte[] buf = new byte[Math.min(len, 1024)];
int bytesRead;
while ((bytesRead = inputStream.read(buf, 0, buf.length)) != -1) bytes.write(buf, 0, bytesRead);
return objectFromByteBuffer(bytes.getRawBuffer(), 0, bytes.size());
}
}