plugins/org.eclipse.viatra2.gui/src/org/eclipse/viatra2/frameworkgui/content/nativefunctions/NativeFunctionPropertySource.java

/*******************************************************************************
 * Copyright (c) 2004-2008 Istvan Rath and Daniel Varro
 * 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:
 *    Istvan Rath - initial API and implementation
 *******************************************************************************/

 package org.eclipse.viatra2.frameworkgui.content.nativefunctions;

import java.lang.annotation.Annotation;
import java.util.ArrayList;

import org.eclipse.ui.views.properties.IPropertyDescriptor;
import org.eclipse.ui.views.properties.IPropertySource2;
import org.eclipse.ui.views.properties.PropertyDescriptor;
import org.eclipse.viatra2.natives.ASMNativeFunction;
import org.eclipse.viatra2.natives.NativeFunctionParameter;
import org.eclipse.viatra2.natives.VIATRANativeFunction;

public class NativeFunctionPropertySource implements IPropertySource2
{

	ASMNativeFunction fNf;
	VIATRANativeFunction fNfA;
	
	public NativeFunctionPropertySource(ASMNativeFunction nf) 
	{
		fNf = nf;
	}
	
	enum PROP_IDS { NAME, ID, DESC, ANNOTATIONS, REMARK, SIGNATURE };
	

	public boolean isPropertyResettable(Object id) { return false; }


	public boolean isPropertySet(Object id) { return false; }


	public Object getEditableValue() { return null;	}


	public IPropertyDescriptor[] getPropertyDescriptors() {
		ArrayList<IPropertyDescriptor> ret = new ArrayList<IPropertyDescriptor>();
		PropertyDescriptor pd = new PropertyDescriptor(PROP_IDS.NAME, "Name");
		pd.setCategory("General");
		ret.add(pd);
		pd = new PropertyDescriptor(PROP_IDS.ID, "ID");
		pd.setCategory("General");
		ret.add(pd);
		pd = new PropertyDescriptor(PROP_IDS.DESC, "Description");
		pd.setCategory("General");
		ret.add(pd);
		
		
		// process annotations
		for (Annotation a : fNf.getClass().getAnnotations())
		{
			if (a.annotationType().equals(VIATRANativeFunction.class))
			{
				fNfA = (VIATRANativeFunction) a;
				
				pd = new PropertyDescriptor(PROP_IDS.REMARK, "Remark");
				pd.setCategory("General");
				ret.add(pd);
				
				pd = new PropertyDescriptor(PROP_IDS.SIGNATURE, "Signature");
				pd.setCategory("General");
				ret.add(pd);
				
				for (NativeFunctionParameter p : fNfA.params())
				{
					pd = new PropertyDescriptor(":"+p.name(),p.name());
					pd.setCategory("Parameters");
					ret.add(pd);
				}
			}
		}
		
		return ret.toArray(new IPropertyDescriptor[]{});
	}


	public Object getPropertyValue(Object id) {
		if (id.equals(PROP_IDS.ID))
			return fNf.getID();
		else if (id.equals(PROP_IDS.NAME))
			return fNf.getName();
		else if (id.equals(PROP_IDS.DESC))
			return fNf.getDescription();
		else if (id.equals(PROP_IDS.REMARK))
			return fNfA!=null?fNfA.remark():"";
		else if (id.equals(PROP_IDS.SIGNATURE))
			return fNfA!=null?getFunctionSignature(fNfA):"";
		else if ( ((String)id).startsWith(":") )
			// parameter signature
		{
			// parse parameter name
			String pname = ((String)id).substring(1);
			for (NativeFunctionParameter p : fNfA.params())
			{
				if (p.name().equals(pname))
				{
					return p.description() + " (variable argument number: "+p.isVarArg()+")";
				}
			}
		}
		return null;
	}

	protected String getParameterSignature(NativeFunctionParameter p)
	{
		String signature = "";
		for (NativeFunctionParameter.ParameterType t : p.type())
		{
			signature+="|"+t.name();
			if (p.isVarArg()) signature+="*";
		}
		signature = signature.substring(1);
		return signature;
	}
	
	protected String getFunctionSignature(VIATRANativeFunction f)
	{
		String s = f.name() + "( ";
		int i = 0;
		for (NativeFunctionParameter p : f.params())
		{
			s += i>0?(", "+getParameterSignature(p)):getParameterSignature(p);
			i++;
			s += " " + p.name();
		}
		String ret = "";
		for (NativeFunctionParameter.ParameterType t : f.returns())
		{
			ret+="|"+t.name();
		}
		return s+" ) : "+ret.substring(1);
	}
	

	public void resetPropertyValue(Object id) { }


	public void setPropertyValue(Object id, Object value) { }

}