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/*******************************************************************************
* Copyright (c) 2001, 2005 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.wst.command.internal.env.common;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.wst.command.internal.env.core.context.ResourceContext;
import org.eclipse.wst.common.environment.IStatusHandler;
/**
* This class defines an output stream that writes to an
* {@link org.eclipse.core.resources.IFile IFile}.
*/
public class FileResourceOutputStream extends OutputStream
{
IPath fFilePath;
ResourceContext fResourceContext;
IProgressMonitor fMonitor;
IStatusHandler fStatusHandler;
ByteArrayOutputStream fByteArrayOutputStream;
boolean fOpen;
/**
* Constructs an output stream that can be used to write to the
* given <code>file</code>. The workspace is neither examined nor
* altered during construction. All resource creation is deferred
* until later in the stream's lifecycle, such as during writing
* or closure.
* <b>Note:</b> The preferred mechanism for creating a stream that
* writes to an IFile is to call the static factory method
* {@link FileResourceUtils#newFileOutputStream FileResourceUtils.newFileOutputStream()}
* and work with the resulting <code>OutputStream</code>.
* Direct construction of a FileResourceOutputStream is not recommended.
* @param file The {@link org.eclipse.core.resources.IFile IFile}
* handle of the file resource to create. The project implied by the
* pathname of the file must already exist,
* that is, this method cannot be used to create projects.
* @param progressMonitor The progress monitor for the operation, or null.
*/
public FileResourceOutputStream (
ResourceContext resourceContext,
IPath filePath,
IProgressMonitor monitor,
IStatusHandler statusHandler
)
{
fFilePath = filePath;
fResourceContext = resourceContext;
fMonitor = monitor;
fStatusHandler = statusHandler;
fByteArrayOutputStream = new ByteArrayOutputStream();
fOpen = true;
}
/**
* Closes the stream.
* @throws IOException If an error occurs while closing the stream.
* For example, if this stream was constructed with overwriteFile = false
* and a file of the same name already exists, then an IOException will
* be thrown either now or during an earlier {@link #write write}.
*/
public void close ()
throws IOException
{
if (!fOpen) return;
fOpen = false;
fByteArrayOutputStream.close();
byte[] buffer = fByteArrayOutputStream.toByteArray();
ByteArrayInputStream tempInputStream = new ByteArrayInputStream(buffer);
try
{
FileResourceUtils.createFile(fResourceContext, fFilePath, tempInputStream, fMonitor, fStatusHandler);
}
catch (CoreException e)
{
throw new IOException(e.getMessage());
}
}
/**
* Flushes the stream. This does not imply the File resource
* will be created or become visible within the workbench.
* @throws IOException If an error occurs. For example, if this
* stream was constructed with overwriteFile = false and a file of the
* same name already exists, then an IOException may be thrown at
* this point.
*/
public void flush ()
throws IOException
{
fByteArrayOutputStream.flush();
}
/**
* Writes all bytes from the given array to the stream.
* @param b The array of bytes to write.
* @throws IOException If an error occurs. For example, if this
* stream was constructed with overwriteFile = false and a file of the
* same name already exists, then an IOException may be thrown at
* this point.
*/
public void write ( byte[] b )
throws IOException
{
fByteArrayOutputStream.write(b);
}
/**
* Writes bytes from the given array beginning at some offset
* and continuing for some number of bytes (len) to the stream.
* @param b The array of bytes to write.
* @param off The offset into the array to begin writing.
* @param len The number of bytes to write.
* @throws IOException If an error occurs. For example, if this
* stream was constructed with overwriteFile = false and a file of the
* same name already exists, then an IOException may be thrown at
* this point.
*/
public void write ( byte[] b, int off, int len )
{
fByteArrayOutputStream.write(b,off,len);
}
/**
* Writes a single byte to the stream.
* @param b The byte to write.
* @throws IOException If an error occurs. For example, if this
* stream was constructed with overwriteFile = false and a file of the
* same name already exists, then an IOException may be thrown at
* this point.
*/
public void write ( int b )
{
fByteArrayOutputStream.write(b);
}
}
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