content: /*******************************************************************************
   * Copyright (c) 2000, 2007 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.wst.jsdt.ui.text.java;
  
  import org.eclipse.core.runtime.CoreException;
  
  
  /**
   * Interface to be implemented by contributors to the extension point
   * <code>org.eclipse.wst.jsdt.ui.quickAssistProcessors</code>.
   *
   *
   * Provisional API: This class/interface is part of an interim API that is still under development and expected to
   * change significantly before reaching stability. It is being made available at this early stage to solicit feedback
   * from pioneering adopters on the understanding that any code that uses this API will almost certainly be broken
   * (repeatedly) as the API evolves. */
  public interface IQuickAssistProcessor {
  
  	/**
  	 * Evaluates if quick assists can be created for the given context. This evaluation must be precise.
  	 *
  	 * @param context The invocation context
  	 * @return Returns <code>true</code> if quick assists can be created
  	 * @throws CoreException CoreException can be thrown if the operation fails
  	 */
  	boolean hasAssists(IInvocationContext context) throws CoreException;
  
  	/**
  	 * Collects quick assists for the given context.
  	 *
  	 * @param context Defines current compilation unit, position and a shared AST
  	 * @param locations The locations of problems at the invocation offset. The processor can decide to only
  	 * 			add assists when there are no errors at the selection offset.
  	 * @return Returns the assists applicable at the location or <code>null</code> if no proposals
  	 * 			can be offered.
  	 * @throws CoreException CoreException can be thrown if the operation fails
  	 */
  	IJavaCompletionProposal[] getAssists(IInvocationContext context, IProblemLocation[] locations) throws CoreException;
  
  }
  