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/*******************************************************************************
* Copyright (c) 2004, 2006 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.core.internal.runtime;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import org.eclipse.core.runtime.*;
import org.eclipse.osgi.service.datalocation.Location;
import org.eclipse.osgi.util.NLS;
import org.osgi.framework.Bundle;
/**
* This class can only be used if OSGi plugin is available
*/
public class DataArea {
/* package */static final String F_META_AREA = ".metadata"; //$NON-NLS-1$
/* package */static final String F_PLUGIN_DATA = ".plugins"; //$NON-NLS-1$
/* package */static final String F_LOG = ".log"; //$NON-NLS-1$
/**
* Internal name of the preference storage file (value <code>"pref_store.ini"</code>) in this plug-in's (read-write) state area.
*/
/* package */static final String PREFERENCES_FILE_NAME = "pref_store.ini"; //$NON-NLS-1$
private IPath location; //The location of the instance data
private boolean initialized = false;
protected void assertLocationInitialized() throws IllegalStateException {
if (location != null && initialized)
return;
Activator activator = Activator.getDefault();
if (activator == null)
throw new IllegalStateException(CommonMessages.activator_not_available);
Location service = activator.getInstanceLocation();
if (service == null)
throw new IllegalStateException(CommonMessages.meta_noDataModeSpecified);
try {
URL url = service.getURL();
if (url == null)
throw new IllegalStateException(CommonMessages.meta_instanceDataUnspecified);
// TODO assume the URL is a file:
// Use the new File technique to ensure that the resultant string is
// in the right format (e.g., leading / removed from /c:/foo etc)
location = new Path(new File(url.getFile()).toString());
initializeLocation();
} catch (CoreException e) {
throw new IllegalStateException(e.getMessage());
}
}
public IPath getMetadataLocation() throws IllegalStateException {
assertLocationInitialized();
return location.append(F_META_AREA);
}
public IPath getInstanceDataLocation() throws IllegalStateException {
assertLocationInitialized();
return location;
}
public IPath getLogLocation() throws IllegalStateException {
return new Path(Activator.getDefault().getFrameworkLog().getFile().getAbsolutePath());
}
/**
* Returns the read/write location in which the given bundle can manage private state.
*/
public IPath getStateLocation(Bundle bundle) throws IllegalStateException {
assertLocationInitialized();
return getStateLocation(bundle.getSymbolicName());
}
public IPath getStateLocation(String bundleName) throws IllegalStateException {
assertLocationInitialized();
return getMetadataLocation().append(F_PLUGIN_DATA).append(bundleName);
}
public IPath getPreferenceLocation(String bundleName, boolean create) throws IllegalStateException {
IPath result = getStateLocation(bundleName);
if (create)
result.toFile().mkdirs();
return result.append(PREFERENCES_FILE_NAME);
}
private void initializeLocation() throws CoreException {
// check if the location can be created
if (location.toFile().exists()) {
if (!location.toFile().isDirectory()) {
String message = NLS.bind(CommonMessages.meta_notDir, location);
throw new CoreException(new Status(IStatus.ERROR, IRuntimeConstants.PI_RUNTIME, IRuntimeConstants.FAILED_WRITE_METADATA, message, null));
}
}
//try infer the device if there isn't one (windows)
if (location.getDevice() == null)
location = new Path(location.toFile().getAbsolutePath());
createLocation();
initialized = true;
}
private void createLocation() throws CoreException {
// append on the metadata location so that the whole structure is created.
File file = location.append(F_META_AREA).toFile();
try {
file.mkdirs();
} catch (Exception e) {
String message = NLS.bind(CommonMessages.meta_couldNotCreate, file.getAbsolutePath());
throw new CoreException(new Status(IStatus.ERROR, IRuntimeConstants.PI_RUNTIME, IRuntimeConstants.FAILED_WRITE_METADATA, message, e));
}
if (!file.canWrite()) {
String message = NLS.bind(CommonMessages.meta_readonly, file.getAbsolutePath());
throw new CoreException(new Status(IStatus.ERROR, IRuntimeConstants.PI_RUNTIME, IRuntimeConstants.FAILED_WRITE_METADATA, message, null));
}
// set the log file location now that we created the data area
IPath path = location.append(F_META_AREA).append(F_LOG);
try {
Activator activator = Activator.getDefault();
if (activator != null)
activator.getFrameworkLog().setFile(path.toFile(), true);
} catch (IOException e) {
e.printStackTrace();
}
}
}
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