1 /**

     2 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the License "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 *

    16 */

    17 

    18 package org.eclipse.cdt.dsf.debug.ui;

    19 

    20 import org.eclipse.cdt.debug.ui.editors.AbstractDebugTextHover;

    21 import org.eclipse.cdt.dsf.concurrent.DataRequestMonitor;

    22 import org.eclipse.cdt.dsf.concurrent.Query;

    23 import org.eclipse.cdt.dsf.debug.service.IExpressions;

    24 import org.eclipse.cdt.dsf.debug.service.IFormattedValues;

    25 import org.eclipse.cdt.dsf.debug.service.IExpressions.IExpressionDMContext;

    26 import org.eclipse.cdt.dsf.debug.service.IFormattedValues.FormattedValueDMContext;

    27 import org.eclipse.cdt.dsf.debug.service.IFormattedValues.FormattedValueDMData;

    28 import org.eclipse.cdt.dsf.debug.service.IStack.IFrameDMContext;

    29 import org.eclipse.cdt.dsf.internal.ui.DsfUIPlugin;

    30 import org.eclipse.cdt.dsf.service.DsfServicesTracker;

    31 import org.eclipse.cdt.dsf.service.DsfSession;

    32 import org.eclipse.core.runtime.IAdaptable;

    33 import org.eclipse.debug.core.model.IDebugModelProvider;

    34 

    35 /**

    36  * An implementation of AbstractDebugTextHover using DSF services.

    37  * 

    38  * @since 2.1

    39  */

    40 abstract public class AbstractDsfDebugTextHover extends AbstractDebugTextHover {

    41 

    42     /**

    43      * Returns the debug model ID of that this debug text hover is to be used for.

    44      */

    45     abstract protected String getModelId();

    46     

    47 	private static class GetExpressionValueQuery extends Query<FormattedValueDMData> {

    48     	private final IFrameDMContext frame;

    49     	private final String expression;

    50 		private DsfServicesTracker dsfServicesTracker;

    51 

    52         public GetExpressionValueQuery(IFrameDMContext frame, String expression, DsfServicesTracker dsfServicesTracker) {

    53             this.frame = frame;

    54 			this.expression = expression;

    55 			this.dsfServicesTracker = dsfServicesTracker;

    56         }

    57 

    58         @Override

    59         protected void execute(final DataRequestMonitor<FormattedValueDMData> rm) {

    60             DsfSession session = DsfSession.getSession(frame.getSessionId());

    61 			IExpressions expressions = dsfServicesTracker.getService(IExpressions.class);

    62     		IExpressionDMContext expressionDMC = expressions.createExpression(frame, expression);

    63     		FormattedValueDMContext formattedValueContext = expressions.getFormattedValueContext(expressionDMC, IFormattedValues.NATURAL_FORMAT);

    64         	expressions.getFormattedExpressionValue(formattedValueContext,

    65         			new DataRequestMonitor<FormattedValueDMData>(session.getExecutor(), rm) {

    66                 @Override

    67                 protected void handleSuccess() {

    68                     rm.setData(getData());

    69                     rm.done();

    70                 }

    71                 

    72                 @Override

    73         		protected void handleFailure() {

    74         			rm.done();

    75         		}

    76             });

    77         }

    78     }

    79 

    80 	protected IFrameDMContext getFrame() {

    81 	    IAdaptable adaptable = getSelectionAdaptable();

    82 	    if (adaptable != null) {

    83 	        return (IFrameDMContext) adaptable.getAdapter(IFrameDMContext.class);

    84 		}

    85 		return null;

    86 	}

    87 

    88 	@Override

    89 	protected boolean canEvaluate() {

    90 	    if (getFrame() == null) {

    91 	        return false;

    92 	    }

    93 	    

    94 		IAdaptable adaptable = getSelectionAdaptable();

    95 		if (adaptable != null) {

    96 		    IDebugModelProvider modelProvider = (IDebugModelProvider)adaptable.getAdapter(IDebugModelProvider.class);

    97 		    if (modelProvider != null) {

    98 		        String[] models = modelProvider.getModelIdentifiers();

    99 		        String myModel = getModelId();

   100 		        for (int i = 0; i < models.length; i++) {

   101 		            if (models[i].equals(myModel)) {

   102 		                return true;

   103 		            }

   104 		        }

   105 		    }

   106 		}

   107 		return false;

   108 	}

   109 

   110 	@Override

   111 	protected String evaluateExpression(String expression) {

   112 		IFrameDMContext frame = getFrame();

   113 		String sessionId = frame.getSessionId();

   114 		DsfServicesTracker dsfServicesTracker = new DsfServicesTracker(DsfUIPlugin.getBundleContext(), sessionId);

   115 		try {

   116 			GetExpressionValueQuery query = new GetExpressionValueQuery(frame, expression, dsfServicesTracker);

   117 			DsfSession session = DsfSession.getSession(sessionId);

   118 	        session.getExecutor().execute(query);

   119 	        try {

   120 	        	FormattedValueDMData data = query.get();

   121 	        	if (data != null)

   122 	        		return data.getFormattedValue();

   123 	        } catch (Exception e) {

   124 	        }

   125 		} finally {

   126 			dsfServicesTracker.dispose();

   127 		}

   128         return null;

   129 	}

   130 

   131 }