PositionOperation.java

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package edu.rice.cs.hpc.traceviewer.operation;

import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.operations.AbstractOperation;
import org.eclipse.core.commands.operations.IUndoContext;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;

import edu.rice.cs.hpc.traceviewer.spaceTimeData.Position;

/**********************************
 * 
 * Operation for changes of cursor position
 * @see getPosition 
 *  method to retrieve the current position
 **********************************/
public class PositionOperation extends AbstractOperation 
{
    final static public IUndoContext context = new PositionOperationContext();
    final private Position position;
    
    public PositionOperation(Position position)
    {
        super(PositionOperationContext.label);
        addContext(context);
        
        this.position = position;
    }
    
    public Position getPosition() {
        return position;
    }


    @Override
    public IStatus execute(IProgressMonitor monitor, IAdaptable info)
            throws ExecutionException {
        return Status.OK_STATUS;
    }

    @Override
    public IStatus redo(IProgressMonitor monitor, IAdaptable info)
            throws ExecutionException {
        return execute(monitor, info);
    }

    @Override
    public IStatus undo(IProgressMonitor monitor, IAdaptable info)
            throws ExecutionException {
        return Status.OK_STATUS;
    }
    
    
    /**********
     * 
     * private inner class for the context of this operation
     *
     **********/
    static private class PositionOperationContext implements IUndoContext
    {
        private final static String label = "PositionOperationContext";

        @Override
        public String getLabel() {
            return label;
        }

        @Override
        public boolean matches(IUndoContext context) {
            return context.getLabel() == label;
        }
        
    }
}