/** * Copyright 2004-2016 Riccardo Solmi. All rights reserved. * This file is part of the Whole Platform. * * The Whole Platform is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * The Whole Platform is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with the Whole Platform. If not, see <http://www.gnu.org/licenses/>. */ package org.whole.lang.ui.commands; import org.eclipse.gef.commands.Command; import org.whole.lang.commons.reflect.CommonsEntityDescriptorEnum; import org.whole.lang.matchers.Matcher; import org.whole.lang.model.IEntity; import org.whole.lang.reflect.EntityDescriptor; import org.whole.lang.util.EntityUtils; /** * @author Riccardo Solmi */ public class ReplaceChildCommand extends Command implements ILegacyCommand { protected IEntity parent; protected IEntity oldChild; protected IEntity newChild; public void execute() { parent.wSet(oldChild, newChild); } public void undo() { parent.wSet(newChild, oldChild); } public void setParent(IEntity parent) { this.parent = parent; } public void setOldChild(IEntity oldChild) { this.oldChild = oldChild; } public void setNewChild(IEntity newChild) { this.newChild = newChild; } public boolean canExecute() { if (!EntityUtils.hasParent(oldChild)) return false; if (EntityUtils.isVariable(parent) && Matcher.matchImpl(CommonsEntityDescriptorEnum.VarType, newChild)) return !EntityUtils.hasParent(parent) || parent.wGetParent().wGetEntityDescriptor(parent) .isPlatformSupertypeOf((EntityDescriptor<?>) newChild.wGetValue()); else return EntityUtils.isFragment(parent) || parent.wContains(oldChild) && parent.wGetEntityDescriptor(oldChild).isPlatformSupertypeOf(newChild.wGetEntityDescriptor()); } }