Package de.innovationgate.eclipse.wgadesigner.refactoring

Source Code of de.innovationgate.eclipse.wgadesigner.refactoring.ContainerMoveParticipant

/*******************************************************************************
* Copyright (c) 2009, 2010 Innovation Gate GmbH.
* 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:
*     Innovation Gate GmbH - initial API and implementation
******************************************************************************/
package de.innovationgate.eclipse.wgadesigner.refactoring;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.eclipse.core.resources.IContainer;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.ltk.core.refactoring.Change;
import org.eclipse.ltk.core.refactoring.CompositeChange;
import org.eclipse.ltk.core.refactoring.RefactoringStatus;
import org.eclipse.ltk.core.refactoring.RefactoringStatusEntry;
import org.eclipse.ltk.core.refactoring.participants.CheckConditionsContext;
import org.eclipse.ltk.core.refactoring.participants.MoveParticipant;

import de.innovationgate.eclipse.wgadesigner.WGADesignerPlugin;

public class ContainerMoveParticipant extends MoveParticipant {

  private List<RefactoringInfo> _refactoringInformations;
  private RefactoringStatus _refactoringStatus = new RefactoringStatus();
  private List<Change> _changes = new ArrayList<Change>();

  @Override
  public RefactoringStatus checkConditions(IProgressMonitor pm, CheckConditionsContext context) throws OperationCanceledException {
   
    Iterator<RefactoringInfo> infos = _refactoringInformations.iterator();
    while (infos.hasNext()) {
      RefactoringInfo info = infos.next();
      try {
        _changes .add(RefactoringManager.createChange(info));
      } catch (Exception e) {
        _refactoringStatus.addEntry(new RefactoringStatusEntry(RefactoringStatus.WARNING, "Unable to create change for '" + info.getDescription() + "'. See log for details."));
        WGADesignerPlugin.getDefault().logError("Unable to create change for '" + info.getDescription() + "'. ", e);
      }
    }
   
    return _refactoringStatus;
  }

  @Override
  public Change createChange(IProgressMonitor pm) throws CoreException, OperationCanceledException {
    CompositeChange change = new CompositeChange("WGA resource changes");
    change.addAll(_changes.toArray(new Change[0]));
    return change;
  }

  @Override
  public String getName() {
    return "Container move participant";
  }

  @Override
  protected boolean initialize(Object element) {
    if (element instanceof IContainer) {
      IContainer container = (IContainer) element;
      try {
        _refactoringInformations = RefactoringManager.getAffectedResources(container, getArguments());
      } catch (Exception e) {
        _refactoringStatus .addEntry(new  RefactoringStatusEntry(RefactoringStatus.ERROR,"Unable to gather refactoring information. See error log for details. Essential refactoring operations will be skipped. Workspace structure might get invalid."));
        WGADesignerPlugin.getDefault().logError("Unable to gather refactoring information.", e);         
      }
      return !_refactoringInformations.isEmpty();
    } else {
      return false;
    }
  }

}
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