/*******************************************************************************
 * Copyright (c) 2010 SAP AG.
 * 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:
 *    Emil Simeonov - initial API and implementation.
 *    Dimitar Donchev - initial API and implementation.
 *    Dimitar Tenev - initial API and implementation.
 *    Nevena Manova - initial API and implementation.
 *    Georgi Konstantinov - initial API and implementation.
 *******************************************************************************/
package org.eclipse.wst.sse.sieditor.model.validation.constraints.http;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.validation.IValidationContext;
import org.eclipse.emf.validation.model.ConstraintStatus;
import org.eclipse.wst.wsdl.BindingInput;
import org.eclipse.wst.wsdl.BindingOperation;
import org.eclipse.wst.wsdl.ExtensibilityElement;
import org.eclipse.wst.wsdl.WSDLElement;
import org.eclipse.wst.wsdl.binding.http.HTTPOperation;

import org.eclipse.wst.sse.sieditor.model.i18n.Messages;
import org.eclipse.wst.sse.sieditor.model.validation.constraints.AbstractConstraint;
/**
 * Ensure the HTTP operation has been defined
 */
public class InputChildrenOperation extends AbstractConstraint{

	@Override
	protected IStatus doValidate(IValidationContext ctx) {
		EObject target = ctx.getTarget();
		
		BindingOperation bindingOperation = getBindingOperation((ExtensibilityElement) target);
		if (bindingOperation != null) {
			for (Object extensibilityElement : bindingOperation.getEExtensibilityElements()) {
				if (extensibilityElement instanceof HTTPOperation) {
					return ConstraintStatus.createSuccessStatus(ctx, target, null);
				}
			}
			String elementName = ((WSDLElement) target).getElement().getLocalName();
			return ConstraintStatus.createStatus(ctx, target, null, Messages.HTTPInputChildrenOperation_0, bindingOperation.getName(), elementName);
		}
		
		return ConstraintStatus.createSuccessStatus(ctx, target, null);
	}

	@Override
	protected boolean shouldExecute(IValidationContext ctx) {
		return true;
	}
	
	private BindingOperation getBindingOperation(ExtensibilityElement element) {
		WSDLElement container = element.getContainer();
		if (container instanceof BindingInput) {
			container = container.getContainer();
			if (container instanceof BindingOperation) {
				return (BindingOperation) container;
			}
		}
		
		return null;
	}

}