/*******************************************************************************
* Copyright (c) 2005, 2009 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.resources.mapping;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
/**
* A model provider descriptor contains information about a model provider obtained from the plug-in
* manifest (<code>plugin.xml</code>) file.
* <p>
* Model provider descriptors are platform-defined objects that exist independent of whether that
* model provider's plug-in has been started. In contrast, a model provider's runtime object (
* <code>ModelProvider</code>) generally runs plug-in-defined code.
* </p>
*
* @see org.eclipse.core.resources.mapping.ModelProvider
* @since 3.2
* @noimplement This interface is not intended to be implemented by clients.
* @noextend This interface is not intended to be extended by clients.
*/
public interface IModelProviderDescriptor {
/**
* Return the ids of model providers that this model provider extends.
*
* @return the ids of model providers that this model provider extends
*/
public String[] getExtendedModels();
/**
* Returns the unique identifier of this model provider.
* <p>
* The model provider identifier is composed of the model provider's plug-in id and the simple
* id of the provider extension. For example, if plug-in <code>"com.xyz"</code> defines a
* provider extension with id <code>"myModelProvider"</code>, the unique model provider
* identifier will be <code>"com.xyz.myModelProvider"</code>.
* </p>
*
* @return the unique model provider identifier
*/
public String getId();
/**
* Returns a displayable label for this model provider. Returns the empty string if no label for
* this provider is specified in the plug-in manifest file.
* <p>
* Note that any translation specified in the plug-in manifest file is automatically applied.
* </p>
*
* @return a displayable string label for this model provider, possibly the empty string
*/
public String getLabel();
/**
* From the provides set of resources, return those that match the enablement rule specified for
* the model provider descriptor. The resource mappings for the returned resources can then be
* obtained by invoking
* {@link ModelProvider#getMappings(IResource[], ResourceMappingContext, IProgressMonitor)}
*
* @param resources the resources
* @return the resources that match the descriptor's enablement rule
*/
public IResource[] getMatchingResources(IResource[] resources) throws CoreException;
/**
* Return the set of traversals that overlap with the resources that this descriptor matches.
*
* @param traversals the traversals being tested
* @return the subset of these traversals that overlap with the resources that match this
* descriptor
* @throws CoreException
*/
public ResourceTraversal[] getMatchingTraversals(ResourceTraversal[] traversals) throws CoreException;
/**
* Return the model provider for this descriptor, instantiating it if it is the first time the
* method is called.
*
* @return the model provider for this descriptor
* @exception CoreException if the model provider could not be instantiated for some reason
*/
public ModelProvider getModelProvider() throws CoreException;
}