| /******************************************************************************* |
| * 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 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; |
| } |
| } |