/*******************************************************************************
 * Copyright (c) 2003, 2004 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
 *******************************************************************************/
/*
 * Created on Oct 10, 2003
 *
 * To change the template for this generated file go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
package org.eclipse.wst.common.internal.emfworkbench.operation;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.emf.common.command.CommandStack;
import org.eclipse.wst.common.frameworks.internal.operations.IOperationHandler;
import org.eclipse.wst.common.frameworks.internal.operations.WTPOperation;
import org.eclipse.wst.common.frameworks.internal.operations.WTPOperationDataModel;
import org.eclipse.wst.common.internal.emfworkbench.EMFWorkbenchContext;
import org.eclipse.wst.common.internal.emfworkbench.integration.EditModel;
import org.eclipse.wst.common.internal.emfworkbench.validateedit.IValidateEditContext;

import com.ibm.wtp.common.UIContextDetermination;
import com.ibm.wtp.emf.workbench.WorkbenchResourceHelperBase;

public abstract class EditModelOperation extends WTPOperation {
	protected EditModel editModel;
	protected EMFWorkbenchContext emfWorkbenchContext;
	private CommandStack commandStack;

	public EditModelOperation(EditModelOperationDataModel dataModel) {
		super(dataModel);
	}

	public EditModelOperation() {
		//Default constructor
	}

	protected final void initilize(IProgressMonitor monitor) {
		EditModelOperationDataModel dataModel = (EditModelOperationDataModel) operationDataModel;
		emfWorkbenchContext = (EMFWorkbenchContext) WorkbenchResourceHelperBase.createEMFContext(dataModel.getTargetProject(), null);
		editModel = emfWorkbenchContext.getEditModelForWrite(dataModel.getStringProperty(EditModelOperationDataModel.EDIT_MODEL_ID), this);
		doInitialize(monitor);
	}

	protected void doInitialize(IProgressMonitor monitor) {
		//init
	}

	protected final void dispose(IProgressMonitor monitor) {
		try {
			doDispose(monitor);
		} finally {
			saveEditModel(monitor);
		}
	}

	private final void saveEditModel(IProgressMonitor monitor) {
		if (null != editModel) {
			if (((EditModelOperationDataModel) operationDataModel).getBooleanProperty(EditModelOperationDataModel.PROMPT_ON_SAVE))
				editModel.saveIfNecessaryWithPrompt(monitor, (IOperationHandler) operationDataModel.getProperty(WTPOperationDataModel.UI_OPERATION_HANLDER), this);
			else
				editModel.saveIfNecessary(monitor, this);
			editModel.releaseAccess(this);
			editModel = null;
		}
		postSaveEditModel(monitor);
	}

	/**
	 * @param monitor
	 */
	protected void postSaveEditModel(IProgressMonitor monitor) {
		// do nothing by default
	}

	protected void doDispose(IProgressMonitor monitor) {
		//dispose
	}

	/**
	 * @return Returns the commandStack.
	 */
	public CommandStack getCommandStack() {
		if (commandStack == null && editModel != null)
			commandStack = editModel.getCommandStack();
		return commandStack;
	}

	/**
	 * @param commandStack
	 *            The commandStack to set.
	 */
	public void setCommandStack(CommandStack commandStack) {
		this.commandStack = commandStack;
	}

	/**
	 * @see org.eclipse.wst.common.frameworks.internal.operation.WTPOperation#validateEdit()
	 */
	protected boolean validateEdit() {
		IValidateEditContext validator = (IValidateEditContext) UIContextDetermination.createInstance(IValidateEditContext.CLASS_KEY);
		return validator.validateState(editModel).isOK();
	}
}