alfresco-community-repo/source/java/org/alfresco/repo/avm/AVMRemoteInputStream.java
Britt Park ef669bec2a Odds and ends. Started infrastructure for AVM command line utilities.
Loosened cache invalidation for write operations so that layered/write 
lookups are not discarded.  Changed direct buffer copies to use 
System.arraycopy.


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/BRANCHES/WCM-DEV2/root@4447 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
2006-11-27 14:42:46 +00:00

114 lines
2.7 KiB
Java

/*
* Copyright (C) 2006 Alfresco, Inc.
*
* Licensed under the Mozilla Public License version 1.1
* with a permitted attribution clause. You may obtain a
* copy of the License at
*
* http://www.alfresco.org/legal/license.txt
*
* 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.alfresco.repo.avm;
import java.io.IOException;
import java.io.InputStream;
/**
* Wrapper around AVMRemote stream reading.
* @author britt
*/
public class AVMRemoteInputStream extends InputStream
{
/**
* The AVMRemote reference.
*/
private AVMRemote fAVMRemote;
/**
* The handle to the input stream.
*/
private String fHandle;
/**
* Construct one.
* @param handle The handle returned by getInputStream();
* @param remote The AVMRemote instance.
*/
public AVMRemoteInputStream(String handle, AVMRemote remote)
{
fHandle = handle;
fAVMRemote = remote;
}
/**
* Read in a single byte.
* @return The byte as 0-255 or -1 for eof.
*/
@Override
public int read() throws IOException
{
try
{
byte [] buff = fAVMRemote.readInput(fHandle, 1);
if (buff.length == 0)
{
return -1;
}
return ((int)buff[0]) & 0xff;
}
catch (Exception e)
{
throw new IOException("Remote I/O Error.");
}
}
/**
* Read a buffer of bytes.
* @param b The buffer into which to put the bytes.
* @param off The offset into the buffer.
* @param len The number of bytes to read.
* @return The actual number of bytes read or -1 on eof.
*/
@Override
public int read(byte[] b, int off, int len) throws IOException
{
try
{
byte [] buff = fAVMRemote.readInput(fHandle, len);
if (buff.length == 0)
{
return -1;
}
System.arraycopy(buff, 0, b, off, buff.length);
return buff.length;
}
catch (Exception e)
{
throw new IOException("Remote I/O Error.");
}
}
/**
* Close the underlying AVMRemote handle.
*/
@Override
public void close() throws IOException
{
try
{
fAVMRemote.closeInputHandle(fHandle);
}
catch (Exception e)
{
throw new IOException("Remote Error closing input stream.");
}
}
}