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/*******************************************************************************
* Copyright (c) 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.web.ui.actions;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Iterator;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkbenchSite;
import org.eclipse.wst.jsdt.web.ui.views.contentoutline.JsJfaceNode;
/**
*
* 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.
*
* @author childsb
*
*/
public class SimpleJSDTActionProxy implements IObjectActionDelegate {
public static Object executeMethod(Object handler, String methodName, Class[] paramaterTypes, Object[] paramaterValues) throws SecurityException,
NoSuchMethodException, IllegalArgumentException, IllegalAccessException, InvocationTargetException {
Class target = handler.getClass();
Method m = target.getMethod(methodName, paramaterTypes);
return m.invoke(handler, paramaterValues);
}
public static JsJfaceNode[] getJsJfaceNodesFromSelection(ISelection selection) {
if (selection == null) {
return new JsJfaceNode[0];
}
ArrayList elements = new ArrayList();
if (selection instanceof IStructuredSelection) {
Iterator itt = ((IStructuredSelection) selection).iterator();
while (itt.hasNext()) {
Object element = itt.next();
if (element instanceof JsJfaceNode) {
elements.add(element);
}
}
return (JsJfaceNode[]) elements.toArray(new JsJfaceNode[elements.size()]);
}
return new JsJfaceNode[0];
}
protected Object actionHandlerTarget;
private ISelection currentSelection;
protected IAction handlerTargetAction;
protected IWorkbenchPart targetWorkbenchPart;
public SimpleJSDTActionProxy() {}
/*
* Most handlers look for WorkBenchSite, so we convert the WorkBenchPart to
* WorkBenchSite for init
*/
protected Object getActionHandler(IAction action) throws IllegalAccessException, NoSuchMethodException, IllegalArgumentException, InstantiationException,
InvocationTargetException {
/* Target class is cached */
if (handlerTargetAction == action && actionHandlerTarget != null) {
return actionHandlerTarget;
}
Class target = null;
String className = getActionHandlerClassName(action);
try {
target = Class.forName(className);
} catch (ClassNotFoundException ex) {
System.out.println("Error.. Class target of action handler not found: " + action);
System.out.println(Messages.getString("SimpleJSDTActionProxy.0") + ex); //$NON-NLS-1$
}
// use the loaded class
Class[] types = new Class[] { IWorkbenchSite.class };
Constructor cons = target.getConstructor(types);
Object[] args = new Object[] { targetWorkbenchPart.getSite() };
actionHandlerTarget = cons.newInstance(args);
handlerTargetAction = action;
return actionHandlerTarget;
}
/*
* Default way of determining the action handlers class name.. may be
* subclassed/overridden
*/
protected String getActionHandlerClassName(IAction action) {
return action.getId();
}
public ISelection getCurrentSelection() {
return currentSelection;
}
public Object[] getRunArgs(IAction action) {
return new Object[] { getCurrentSelection() };
}
public Class[] getRunArgTypes() {
return new Class[] { IStructuredSelection.class };
}
public Object[] getSelectionChangeArgs(IAction action, ISelection selection) {
return new Object[] { getCurrentSelection() };
}
public Class[] getSelectionChangeArgTypes() {
return new Class[] { IStructuredSelection.class };
}
/*
* Generic reflection util method to execute a named method with unknown
* paramaters on an object
*/
/*
* (non-Javadoc)
*
* @see org.eclipse.ui.IActionDelegate#run(org.eclipse.jface.action.IAction)
*/
public void run(IAction action) {
try {
Object handler = getActionHandler(action);
SimpleJSDTActionProxy.executeMethod(handler, "run", getRunArgTypes(), getRunArgs(action)); //$NON-NLS-1$
} catch (IllegalArgumentException ex) {
// TODO Auto-generated catch block
ex.printStackTrace();
} catch (SecurityException ex) {
// TODO Auto-generated catch block
ex.printStackTrace();
} catch (IllegalAccessException ex) {
// TODO Auto-generated catch block
ex.printStackTrace();
} catch (NoSuchMethodException ex) {
// TODO Auto-generated catch block
ex.printStackTrace();
} catch (InstantiationException ex) {
// TODO Auto-generated catch block
ex.printStackTrace();
} catch (InvocationTargetException ex) {
// TODO Auto-generated catch block
ex.printStackTrace();
}
}
public void selectionChanged(IAction action, ISelection selection) {
currentSelection = selection;
if(targetWorkbenchPart==null) return;
try {
Object handler = getActionHandler(action);
SimpleJSDTActionProxy.executeMethod(handler, "selectionChanged", getSelectionChangeArgTypes(), getSelectionChangeArgs(action, selection)); //$NON-NLS-1$
} catch (IllegalArgumentException ex) {
// TODO Auto-generated catch block
ex.printStackTrace();
} catch (SecurityException ex) {
// TODO Auto-generated catch block
ex.printStackTrace();
} catch (IllegalAccessException ex) {
// TODO Auto-generated catch block
ex.printStackTrace();
} catch (NoSuchMethodException ex) {
// TODO Auto-generated catch block
ex.printStackTrace();
} catch (InstantiationException ex) {
// TODO Auto-generated catch block
ex.printStackTrace();
} catch (InvocationTargetException ex) {
// TODO Auto-generated catch block
ex.printStackTrace();
}
}
public void setActivePart(IAction action, IWorkbenchPart targetPart) {
this.targetWorkbenchPart = targetPart;
}
protected void setSelection(ISelection selection) {
this.currentSelection = selection;
}
}
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