| /******************************************************************************* |
| * Copyright (c) 2007, 2018 IBM Corporation and others. |
| * |
| * 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: |
| * IBM Corporation - initial API and implementation |
| * Jacek Pospychala <jacek.pospychala@pl.ibm.com> - bug 207344 |
| *******************************************************************************/ |
| package org.eclipse.ui.internal.views.log; |
| |
| import java.io.PrintWriter; |
| import java.util.ArrayList; |
| import java.util.List; |
| import org.eclipse.core.runtime.PlatformObject; |
| import org.eclipse.jface.resource.ImageDescriptor; |
| import org.eclipse.ui.model.IWorkbenchAdapter; |
| |
| /** |
| * Everything that appears in LogView is Abstract Entry. It provides composite pattern. |
| */ |
| public abstract class AbstractEntry extends PlatformObject implements IWorkbenchAdapter { |
| |
| /** |
| * The collection of direct children of this entry |
| */ |
| private List<AbstractEntry> children = new ArrayList<>(); |
| protected Object parent; |
| |
| /** |
| * Adds the specified child entry to the listing of children. |
| * If the specified child is <code>null</code>, no work is done |
| * |
| * @param child |
| */ |
| public void addChild(AbstractEntry child) { |
| if (child != null) { |
| children.add(0, child); |
| child.setParent(this); |
| } |
| } |
| |
| @Override |
| public Object[] getChildren(Object parent) { |
| return children.toArray(); |
| } |
| |
| /** |
| * @return true if this entry has children, false otherwise |
| */ |
| public boolean hasChildren() { |
| return children.size() > 0; |
| } |
| |
| /** |
| * @return the size of the child array |
| * |
| * TODO rename to getChildCount(), or something more meaningful |
| */ |
| public int size() { |
| return children.size(); |
| } |
| |
| @Override |
| public ImageDescriptor getImageDescriptor(Object object) { |
| return null; |
| } |
| |
| @Override |
| public String getLabel(Object o) { |
| return null; |
| } |
| |
| @Override |
| public Object getParent(Object o) { |
| return parent; |
| } |
| |
| /** |
| * Sets the parent of this entry |
| * @param parent |
| */ |
| public void setParent(AbstractEntry parent) { |
| this.parent = parent; |
| } |
| |
| /** |
| * removes all of the children specified in the given listing |
| * |
| * @param list the list of children to remove |
| */ |
| public void removeChildren(List<AbstractEntry> list) { |
| children.removeAll(list); |
| } |
| |
| /** |
| * Removes all of the children from this entry |
| */ |
| public void removeAllChildren() { |
| children.clear(); |
| } |
| |
| /** |
| * Writes this entry information into the given {@link PrintWriter} |
| * |
| * @param writer |
| */ |
| public abstract void write(PrintWriter writer); |
| } |