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/*******************************************************************************
* Copyright (c) 2004, 2005 Sybase, Inc. 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:
* Sybase, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.jsf.facesconfig.ui.pageflow.command;
import org.eclipse.gef.commands.Command;
import org.eclipse.jst.jsf.facesconfig.ui.pageflow.PageflowMessages;
import org.eclipse.jst.jsf.facesconfig.ui.pageflow.model.PageflowLink;
import org.eclipse.jst.jsf.facesconfig.ui.pageflow.model.PageflowNode;
import org.eclipse.jst.jsf.facesconfig.ui.pageflow.synchronization.TransformUtil;
/**
* This is the connection command for pageflow editpart
*
* @author Xiao-guang Zhang, hmeng
*/
public abstract class ConnectionCommand extends Command {
/** Old source pageflow node */
protected PageflowNode oldSource;
/** Old target pageflow node */
protected PageflowNode oldTarget;
/** New source pageflow node */
protected PageflowNode source;
/** New target pageflow node */
protected PageflowNode target;
/** pageflow link */
protected PageflowLink link;
/**
* Default constructor
*/
public ConnectionCommand() {
super(PageflowMessages.Pageflow_Commands_ConnectionCommand_Label);
}
/*
* (non-Javadoc)
*
* @see Command#canExecute()
*/
public boolean canExecute() {
return TransformUtil.isValidPageflowElement(link);
}
/**
* perform the main command execution. Sub-classes should override.
*/
protected void doExecute() {
// do nothing; sub-class can over-ride
}
/*
* (non-Javadoc)
*
* @see Command#execute()
*/
public final void execute() {
if (canExecute()) {
doExecute();
} else {
link = null;
}
}
/*
* (non-Javadoc)
*
* @see Command#redo()
*/
public void redo() {
execute();
}
/*
* (non-Javadoc)
*
* @see ommand#undo()
*/
public void undo() {
// do nothing
}
/**
* Get the source pageflow node
*
* @return - the source pageflow node
*/
public PageflowNode getSource() {
return source;
}
/**
* Get the target pageflow node
*
* @return - the target pageflow node.
*/
public PageflowNode getTarget() {
return target;
}
/**
* Get the pageflow link
*
* @return - the pageflow link.
*/
public PageflowLink getPFLink() {
return link;
}
/**
* Set the source pageflow node
*
* @param newSource -
* new source pageflow node
*/
public void setSource(PageflowNode newSource) {
source = newSource;
}
/**
* Set the target pageflow node
*
* @param newTarget -
* new target pageflow node
*/
public void setTarget(PageflowNode newTarget) {
target = newTarget;
}
/**
* Set the pageflow link
*
* @param link -
* new pageflow link
*/
public void setPFLink(PageflowLink link) {
this.link = link;
oldSource = link.getSource();
oldTarget = link.getTarget();
}
}
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