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/*******************************************************************************
* Copyright (c) 2004, 2007 Sybase, Inc. and others.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Sybase, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.jsf.facesconfig.ui.pageflow.command;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jst.jsf.facesconfig.ui.pageflow.PageflowMessages;
import org.eclipse.jst.jsf.facesconfig.ui.pageflow.model.Pageflow;
import org.eclipse.jst.jsf.facesconfig.ui.pageflow.model.PageflowLink;
import org.eclipse.jst.jsf.facesconfig.ui.pageflow.model.PageflowNode;
/**
* This is the delete command for pageflow editpart
*
*/
public class DeleteNodeCommand extends AbstractBatchEditCommand {
/** the deleting pageflow node */
private PageflowNode child;
/** parent pageflow */
private Pageflow parent;
/** index of pageflow nodes */
private int index = -1;
/** source connections with the deleting node */
private List sourceConnections = new ArrayList();
private List sourceConnectionSources = new ArrayList();
private List sourceConnectionTargets = new ArrayList();
/** target connections with the deleting node */
private List targetConnections = new ArrayList();
private List targetConnectionSources = new ArrayList();
private List targetConnectionTargets = new ArrayList();
/**
* @param pageflow
*/
public DeleteNodeCommand(Pageflow pageflow) {
// Pageflow.Commands.DeleteNodeCommand.Label = Delete
super(pageflow, PageflowMessages.Pageflow_Commands_DeleteNodeCommand_Label);
}
/*
* (non-Javadoc)
*
* @see Command#execute()
*/
public void doExecute() {
primExecute();
}
/*
* (non-Javadoc)
*
* @see Command#redo()
*/
public void doRedo() {
primExecute();
}
/*
* (non-Javadoc)
*
* @see Command#undo()
*/
public void doUndo() {
parent.getNodes().add(index, child);
restoreConnections(child);
}
/**
* delete the connections related with the pageflow node.
*
* @param node -
* the deleting pageflow node
*/
private void deleteConnections(PageflowNode node) {
while (node.getOutlinks().size() > 0) {
// Note:should save the source and target of the link, otherwise
// source and target will be lost,
// when the source and target node remove the link.
PageflowLink link = (PageflowLink) node.getOutlinks().get(0);
sourceConnections.add(link);
sourceConnectionSources.add(link.getSource());
sourceConnectionTargets.add(link.getTarget());
link.getTarget().getInlinks().remove(link);
node.getOutlinks().remove(link);
parent.getLinks().remove(link);
}
while (node.getInlinks().size() > 0) {
// Note: should save the source and target of the link, otherwise
// source and target will be lost,
// when the source and target node remove the link.
PageflowLink link = (PageflowLink) node.getInlinks().get(0);
targetConnections.add(link);
targetConnectionSources.add(link.getSource());
targetConnectionTargets.add(link.getTarget());
link.getSource().getOutlinks().remove(link);
node.getInlinks().remove(link);
parent.getLinks().remove(link);
}
}
/**
* execute the delete command
*
*
*/
protected void primExecute() {
deleteConnections(child);
index = parent.getNodes().indexOf(child);
parent.getNodes().remove(child);
}
/**
* restore the connections of the deleted pageflow node
*
* @param node -
* the deleted pageflow node
*/
private void restoreConnections(PageflowNode node) {
for (int i = 0; i < sourceConnections.size(); i++) {
// restore the link with the source and target
PageflowLink link = (PageflowLink) sourceConnections.get(i);
PageflowNode source = (PageflowNode) sourceConnectionSources.get(i);
PageflowNode target = (PageflowNode) sourceConnectionTargets.get(i);
link.setSource(source);
link.setTarget(target);
parent.getLinks().add(link);
node.getOutlinks().add(link);
link.getTarget().getInlinks().add(link);
}
sourceConnections.clear();
for (int i = 0; i < targetConnections.size(); i++) {
// restore the link with the source and target
PageflowLink link = (PageflowLink) targetConnections.get(i);
PageflowNode source = (PageflowNode) targetConnectionSources.get(i);
PageflowNode target = (PageflowNode) targetConnectionTargets.get(i);
link.setSource(source);
link.setTarget(target);
parent.getLinks().add(link);
node.getInlinks().add(link);
link.getSource().getOutlinks().add(link);
}
targetConnections.clear();
}
/**
* set the child pageflow node
*
* @param c -
* the child pageflow node
*/
public void setChild(PageflowNode c) {
child = c;
}
/**
* set the parent pageflow
*
* @param p -
* the parent pageflow
*/
public void setParent(Pageflow p) {
parent = p;
}
}
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