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/*
* Copyright (c) 2012, 2015 Eike Stepper (Berlin, Germany) 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:
* Eike Stepper - initial API and implementation
*/
package org.eclipse.emf.cdo.internal.ui;
import org.eclipse.emf.cdo.common.lob.CDOBlob;
import org.eclipse.emf.cdo.common.lob.CDOClob;
import org.eclipse.emf.cdo.eresource.CDOBinaryResource;
import org.eclipse.emf.cdo.eresource.CDOResource;
import org.eclipse.emf.cdo.eresource.CDOResourceLeaf;
import org.eclipse.emf.cdo.eresource.CDOTextResource;
import org.eclipse.emf.cdo.transaction.CDOTransaction;
import org.eclipse.emf.cdo.view.CDOView;
import org.eclipse.net4j.util.StringUtil;
import org.eclipse.net4j.util.WrappedException;
import org.eclipse.net4j.util.io.IORuntimeException;
import org.eclipse.net4j.util.io.IOUtil;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.operation.IRunnableContext;
import org.eclipse.jface.text.Document;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.source.IAnnotationModel;
import org.eclipse.ui.texteditor.AbstractDocumentProvider;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.CharArrayReader;
import java.io.CharArrayWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
/**
* @author Eike Stepper
*/
public class CDOLobStorage extends AbstractDocumentProvider
{
private static final String CHARSET_UTF_8 = "UTF-8"; //$NON-NLS-1$
public CDOLobStorage()
{
}
@Override
protected IDocument createDocument(Object element) throws CoreException
{
if (element instanceof CDOLobEditorInput)
{
CDOResourceLeaf resource = ((CDOLobEditorInput)element).getResource();
String contents = getContents(resource);
IDocument document = new Document();
document.set(contents);
return document;
}
return null;
}
@Override
protected IAnnotationModel createAnnotationModel(Object element) throws CoreException
{
return null;
}
@Override
public boolean isReadOnly(Object element)
{
if (element instanceof CDOLobEditorInput)
{
CDOResourceLeaf resource = ((CDOLobEditorInput)element).getResource();
return resource.cdoView().isReadOnly();
}
return super.isReadOnly(element);
}
@Override
public boolean isModifiable(Object element)
{
return !isReadOnly(element);
}
@Override
protected void doSaveDocument(IProgressMonitor monitor, Object element, IDocument document, boolean overwrite)
throws CoreException
{
if (element instanceof CDOLobEditorInput)
{
CDOLobEditorInput editorInput = (CDOLobEditorInput)element;
CDOResourceLeaf resource = editorInput.getResource();
String contents = document.get();
try
{
if (resource instanceof CDOTextResource)
{
CDOTextResource textResource = (CDOTextResource)resource;
CDOClob clob = new CDOClob(new CharArrayReader(contents.toCharArray()));
textResource.setContents(clob);
}
else if (resource instanceof CDOBinaryResource)
{
byte[] bytes = contents.getBytes(getDefaultEncoding());
CDOBlob blob = new CDOBlob(new ByteArrayInputStream(bytes));
((CDOBinaryResource)resource).setContents(blob);
}
if (editorInput.isCommitOnSave())
{
CDOView view = resource.cdoView();
if (view instanceof CDOTransaction)
{
CDOTransaction transaction = (CDOTransaction)view;
transaction.commit();
}
}
}
catch (Exception ex)
{
throw WrappedException.wrap(ex);
}
}
}
@Override
protected IRunnableContext getOperationRunner(IProgressMonitor monitor)
{
return null;
}
private String getContents(CDOResourceLeaf resource)
{
try
{
if (resource instanceof CDOTextResource)
{
CDOTextResource textResource = (CDOTextResource)resource;
CDOClob clob = textResource.getContents();
if (clob == null)
{
return StringUtil.EMPTY;
}
Reader reader = null;
try
{
reader = clob.getContents();
CharArrayWriter writer = new CharArrayWriter();
IOUtil.copyCharacter(reader, writer);
return writer.toString();
}
finally
{
IOUtil.close(reader);
}
}
if (resource instanceof CDOBinaryResource)
{
CDOBlob blob = ((CDOBinaryResource)resource).getContents();
if (blob == null)
{
return StringUtil.EMPTY;
}
InputStream inputStream = null;
try
{
inputStream = blob.getContents();
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
IOUtil.copy(inputStream, outputStream);
return new String(outputStream.toByteArray(), getDefaultEncoding());
}
finally
{
IOUtil.close(inputStream);
}
}
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
((CDOResource)resource).save(outputStream, null);
return new String(outputStream.toByteArray(), getDefaultEncoding());
}
catch (IOException ex)
{
throw new IORuntimeException(ex);
}
}
private String getDefaultEncoding()
{
String encoding = CHARSET_UTF_8;
try
{
encoding = org.eclipse.core.resources.ResourcesPlugin.getWorkspace().getRoot().getDefaultCharset();
}
catch (CoreException ex)
{
// Ignore
}
return encoding;
}
}
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