| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.openjpa.persistence.kernel.common.apps; |
| |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.Set; |
| import javax.persistence.CascadeType; |
| import javax.persistence.Entity; |
| import javax.persistence.FetchType; |
| import javax.persistence.GeneratedValue; |
| import javax.persistence.GenerationType; |
| import javax.persistence.Id; |
| import javax.persistence.ManyToMany; |
| import javax.persistence.ManyToOne; |
| import javax.persistence.Column; |
| |
| import org.apache.openjpa.persistence.FetchAttribute; |
| import org.apache.openjpa.persistence.FetchGroup; |
| import org.apache.openjpa.persistence.FetchGroups; |
| |
| /** |
| * @author <A HREF="mailto:pinaki.poddar@gmail.com>Pinaki Poddar</A> |
| */ |
| @Entity |
| @FetchGroups({ |
| @FetchGroup(name = "name+parent+grandparent", attributes = { |
| @FetchAttribute(name = "_name"), |
| @FetchAttribute(name = "_parent", recursionDepth = 2) |
| }), |
| @FetchGroup(name = "name+parent+grandparent+greatgrandparent", attributes = { |
| @FetchAttribute(name = "_name"), |
| @FetchAttribute(name = "_parent", recursionDepth = 3) |
| }), |
| @FetchGroup(name = "name+parent", attributes = { |
| @FetchAttribute(name = "_name"), |
| @FetchAttribute(name = "_parent") |
| }), |
| @FetchGroup(name = "allparents", attributes = { |
| @FetchAttribute(name = "_name"), |
| @FetchAttribute(name = "_parent", recursionDepth = -1) |
| }), |
| @FetchGroup(name = "name", attributes = @FetchAttribute(name = "_name")) |
| }) |
| public class PCDirectory { |
| |
| @Id |
| @GeneratedValue(strategy = GenerationType.AUTO) |
| private int id; |
| |
| @Column(name="name_col") |
| private String _name; |
| |
| @ManyToOne(fetch = FetchType.LAZY, cascade = CascadeType.PERSIST) |
| private PCDirectory _parent; |
| |
| @ManyToMany(cascade = CascadeType.PERSIST) |
| private Set<PCDirectory> _children; |
| |
| @ManyToMany(cascade = CascadeType.PERSIST) |
| private Set<PCFile> _files; |
| |
| /** |
| * |
| */ |
| public PCDirectory() { |
| super(); |
| } |
| |
| public PCDirectory(String name) { |
| super(); |
| _name = name; |
| } |
| |
| public int getId() { |
| return this.id; |
| } |
| |
| public String getName() { |
| return _name; |
| } |
| |
| public PCDirectory getParent() { |
| return _parent; |
| } |
| |
| public Set getChildren() { |
| return _children; |
| } |
| |
| public Set getFiles() { |
| return _files; |
| } |
| |
| public void add(PCDirectory dir) { |
| if (dir == null) |
| throw new NullPointerException("null directory"); |
| if (dir.getParent() != null && dir.getParent() != this) |
| throw new IllegalArgumentException(dir + " has a different parent"); |
| if (_children == null) |
| _children = new HashSet(); |
| _children.add(dir); |
| dir._parent = this; |
| } |
| |
| public PCFile add(String name) { |
| if (name == null) |
| throw new NullPointerException("null file"); |
| PCFile file = new PCFile(this, name); |
| if (_files == null) |
| _files = new HashSet(); |
| if (_files.contains(file)) |
| throw new IllegalArgumentException("duplicate file" + file); |
| _files.add(file); |
| return file; |
| } |
| |
| public boolean isChild(PCDirectory dir, boolean recurse) { |
| if (_children == null) |
| return false; |
| |
| if (_children.contains(dir)) |
| return true; |
| if (recurse) { |
| Iterator i = _children.iterator(); |
| while (i.hasNext()) { |
| PCDirectory child = (PCDirectory) i.next(); |
| if (child.isChild(dir, recurse)) |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| public boolean isChild(PCFile file, boolean recurse) { |
| if (_files != null && _files.contains(file)) |
| return true; |
| |
| if (_children == null) |
| return false; |
| |
| if (recurse) { |
| Iterator i = _children.iterator(); |
| while (i.hasNext()) { |
| PCDirectory child = (PCDirectory) i.next(); |
| if (child.isChild(file, recurse)) |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| public static Object reflect(PCDirectory instance, String name) { |
| if (instance == null) |
| return null; |
| try { |
| return PCDirectory.class.getDeclaredField(name).get(instance); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |