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/*******************************************************************************
* Copyright (c) 2011, 2012 Wind River Systems, Inc. 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:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tcf.te.core.adapters;
import java.net.URI;
import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Platform;
import org.eclipse.tcf.te.core.activator.CoreBundleActivator;
import org.eclipse.tcf.te.runtime.model.interfaces.IModelNode;
import org.eclipse.tcf.te.runtime.model.interfaces.IModelNodeProvider;
import org.eclipse.tcf.te.runtime.persistence.interfaces.IPersistableNameProvider;
import org.eclipse.tcf.te.runtime.persistence.interfaces.IPersistableNodeProperties;
import org.eclipse.tcf.te.runtime.persistence.interfaces.IPersistableURIProvider;
/**
* Model node persistable adapter implementation.
*/
public class ModelNodePersistableURIProvider implements IPersistableURIProvider {
/**
* Determine the model node from the given context object.
*
* @param context The context object or <code>null</code>.
* @return The model node or <code>null</code>.
*/
private IModelNode getModelNode(Object context) {
IModelNode node = null;
if (context instanceof IModelNode) {
node = (IModelNode)context;
}
else if (context instanceof IModelNodeProvider) {
node = ((IModelNodeProvider)context).getModelNode();
}
return node;
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.runtime.persistence.interfaces.IPersistableURIProvider#getURI(java.lang.Object)
*/
@Override
public URI getURI(Object context) {
Assert.isNotNull(context);
URI uri = null;
IModelNode node = getModelNode(context);
// Only model nodes are supported
if (node != null) {
IPath path = null;
// Try to adapt the node to the IPersistableNameProvider interface first
IPersistableNameProvider provider = (IPersistableNameProvider)node.getAdapter(IPersistableNameProvider.class);
if (provider != null) {
String name = provider.getName(node);
if (name != null && !"".equals(name.trim())) { //$NON-NLS-1$
path = getRoot().append(name.trim());
}
}
if (path == null) {
// If the path could not be determined via the IPersistableNameProvider interface, check for the node id
if (node.getStringProperty(IModelNode.PROPERTY_ID) != null && !"".equals(node.getStringProperty(IModelNode.PROPERTY_ID).trim())) { //$NON-NLS-1$
path = getRoot().append(makeValidFileSystemName(node.getStringProperty(IModelNode.PROPERTY_ID).trim()));
}
// If the id is not set, check for the node name
else if (node.getName() != null && !"".equals(node.getName().trim())) { //$NON-NLS-1$
path = getRoot().append(makeValidFileSystemName(node.getName().trim()));
}
// If the name is not set, check for an URI
else if (node.getProperty(IPersistableNodeProperties.PROPERTY_URI) != null) {
Object candidate = node.getProperty(IPersistableNodeProperties.PROPERTY_URI);
if (candidate instanceof URI) {
uri = (URI)candidate;
}
else if (candidate instanceof String && !"".equals(((String)candidate).trim())) { //$NON-NLS-1$
uri = URI.create(((String)candidate).trim());
}
}
// No name and no explicit path is set -> use the UUID
else if (node.getUUID() != null) {
path = getRoot().append(makeValidFileSystemName(node.getUUID().toString().trim()));
}
}
if (path != null) {
if (!"json".equals(path.getFileExtension())) { //$NON-NLS-1$
path = path.addFileExtension("json"); //$NON-NLS-1$
}
uri = path.toFile().toURI();
}
}
return uri;
}
/**
* Make a valid file system name from the given name.
*
* @param name The original name. Must not be <code>null</code>.
* @return The valid file system name.
*/
protected String makeValidFileSystemName(String name) {
Assert.isNotNull(name);
return name.replaceAll("\\W", "_"); //$NON-NLS-1$ //$NON-NLS-2$
}
/**
* Returns the root location.
*
* @return The root location or <code>null</code> if it cannot be determined.
*/
protected IPath getRoot() {
IPath location = null;
// Try the bundles state location first (not available if launched with -data @none).
try {
IPath path = Platform.getStateLocation(CoreBundleActivator.getContext().getBundle()).append(".store"); //$NON-NLS-1$
boolean exists = path.toFile().exists();
if (!exists) exists = path.toFile().mkdirs();
if (exists && path.toFile().canRead() && path.toFile().isDirectory()) {
location = path;
}
} catch (IllegalStateException e) {
// Workspace less environments (-data @none)
// The users local target definition persistence directory is $HOME/.tcf/.store.
IPath path = new Path(System.getProperty("user.home")).append(".tcf/.store"); //$NON-NLS-1$ //$NON-NLS-2$
boolean exists = path.toFile().exists();
if (!exists) exists = path.toFile().mkdirs();
if (exists && path.toFile().canRead() && path.toFile().isDirectory()) {
location = path;
}
}
return location;
}
}
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