/* (non-Javadoc)
* @see org.eclipse.jface.viewers.IContentProvider#dispose()
*/
public void dispose() {
ICommonContentExtensionSite extensionSite = getExtensionSite();
if (extensionSite != null) {
extensionSite.getExtensionStateModel().removePropertyChangeListener(this);
}
ISynchronizationContext context = getContext();
if (context != null) context.getDiffTree().removeDiffChangeListener(this);
ISynchronizePageConfiguration configuration = getConfiguration();
if (configuration != null) configuration.removePropertyChangeListener(this);
}
private Object[] internalGetChildren(Object parent, boolean isElement) {
Object element = internalGetElement(parent);
if (element instanceof ISynchronizationScope) {
// If the root is a scope, we want to include all models in the scope
ISynchronizationScope rms = (ISynchronizationScope) element;
if (rms.getMappings(getModelProviderId()).length > 0) {
empty = false;
return new Object[] {getModelProvider()};
}
empty = true;
return new Object[0];
} else if (element instanceof ISynchronizationContext) {
ISynchronizationContext context = (ISynchronizationContext) element;
// If the root is a context, we want to filter by the context
ISynchronizationContext sc = (ISynchronizationContext) element;
if (sc.getScope().getMappings(getModelProviderId()).length > 0) {
Object root = getModelRoot();
boolean initialized = isInitialized(context);
if (!initialized
|| getChildrenInContext(sc, root, getDelegateChildren(root, isElement)).length > 0) {
if (!initialized) requestInitialization(context);
empty = false;
return new Object[] {getModelProvider()};
}
}
empty = true;
return new Object[0];
}
if (element == getModelProvider()) {
ISynchronizationContext context = getContext();
if (context != null && !isInitialized(context)) {
return new Object[0];
}
element = getModelRoot();
if (parent instanceof TreePath) {
parent = TreePath.EMPTY.createChildPath(element);
} else {
parent = element;
}
}
Object[] delegateChildren = getDelegateChildren(parent, isElement);
ISynchronizationContext context = getContext();
if (context == null) {
ISynchronizationScope scope = getScope();
if (scope == null) {
return delegateChildren;
} else {
return getChildrenInScope(scope, parent, delegateChildren);
}
} else {
return getChildrenInContext(context, parent, delegateChildren);
}
}
/* (non-Javadoc)
* @see org.eclipse.ui.navigator.ICommonContentProvider#init(org.eclipse.ui.navigator.ICommonContentExtensionSite)
*/
public void init(ICommonContentExtensionSite site) {
// Set the site
this.site = site;
// Configure the content provider based on the site and state model
site.getExtensionStateModel().addPropertyChangeListener(this);
ISynchronizePageConfiguration configuration = getConfiguration();
if (configuration != null) configuration.addPropertyChangeListener(this);
ITreeContentProvider provider = getDelegateContentProvider();
if (provider instanceof ICommonContentProvider) {
((ICommonContentProvider) provider).init(site);
}
ISynchronizationContext context = getContext();
if (context != null) context.getDiffTree().addDiffChangeListener(this);
}
/**
* Return whether the given object is visible in the synchronization page showing this content
* based on the diffs in the given context. Visibility is determined by obtaining the diffs for
* the object from the context by calling {@link #getTraversals(ISynchronizationContext, Object)}
* to get the traversals, then obtaining the diffs from the context's diff tree and then calling
* {@link #isVisible(IDiff)} for each diff.
*
* @param context the synchronization context
* @param object the object
* @return whether the given object is visible in the synchronization page showing this content
*/
protected boolean isVisible(ISynchronizationContext context, Object object) {
ResourceTraversal[] traversals = getTraversals(context, object);
IDiff[] deltas = context.getDiffTree().getDiffs(traversals);
boolean visible = false;
if (isVisible(deltas)) {
visible = true;
}
return visible;
}
/**
* Return the subset of children that are of interest from the given context. By default, this
* method returns those children whose traversals contain a diff in the context. However, it does
* not include those model elements that do not exist locally but are within the context (e.g.
* locally deleted elements and remotely added elements). Subclasses must override to include
* these.
*
* @param context the context
* @param parent the parent of the children
* @param children the children
* @return the subset of children that are of interest from the given context
*/
protected Object[] getChildrenInContext(
ISynchronizationContext context, Object parent, Object[] children) {
if (children.length != 0) children = getChildrenInScope(context.getScope(), parent, children);
if (parent instanceof IResource) {
IResource resource = (IResource) parent;
children = getChildrenWithPhantoms(context, resource, children);
}
if (children.length == 0) return children;
return internalGetChildren(context, parent, children);
}
private Object[] getChildrenWithPhantoms(
ISynchronizationContext context, IResource resource, Object[] children) {
IResource[] setChildren = context.getDiffTree().members(resource);
if (setChildren.length == 0) return children;
if (children.length == 0) return setChildren;
Set result = new HashSet(children.length);
for (int i = 0; i < children.length; i++) {
result.add(children[i]);
}
for (int i = 0; i < setChildren.length; i++) {
result.add(setChildren[i]);
}
return result.toArray();
}
/**
* Return whether the given element has children in the given context. The children may or may not
* exist locally. By default, this method returns true if the traversals for the element contain
* any diffs. This could result in false positives. Subclasses can override to provide a more
* efficient or precise answer.
*
* @param element a model element.
* @return whether the given element has children in the given context
*/
protected boolean hasChildrenInContext(ISynchronizationContext context, Object element) {
ResourceTraversal[] traversals = getTraversals(context, element);
if (traversals == null) return true;
return context.getDiffTree().getDiffs(traversals).length > 0;
}
/**
* If we needed to retrieve additional mappings for the given context's scope, this will return
* them.
*
* @param context The context to check for additional mappings.
* @return The additional mappings for the given context if any, <code>null</code> otherwise.
*/
public static ResourceMapping[] getAdditionalMappings(ISynchronizationContext context) {
return (ResourceMapping[]) context.getCache().get(EMFModelProvider.EMF_ADDITIONAL_MAPPINGS);
}
/**
* Caches the given mappings within the given synchronization context.
*
* @param context Context in which to cache the given additional mappings.
* @param additionalMappings Additional mappings discovered for this context.
*/
public static void cacheAdditionalMappings(
ISynchronizationContext context, ResourceMapping[] additionalMappings) {
context.getCache().put(EMFModelProvider.EMF_ADDITIONAL_MAPPINGS, additionalMappings);
}