Francesco Furfari | d8bdb64 | 2006-04-04 23:33:40 +0000 | [diff] [blame] | 1 | /*
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| 2 | * Copyright 2006 The Apache Software Foundation
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| 3 | *
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| 4 | * Licensed under the Apache License, Version 2.0 (the "License");
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| 5 | * you may not use this file except in compliance with the License.
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| 6 | * You may obtain a copy of the License at
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| 7 | *
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| 8 | * http://www.apache.org/licenses/LICENSE-2.0
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| 9 | *
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| 10 | * Unless required by applicable law or agreed to in writing, software
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| 11 | * distributed under the License is distributed on an "AS IS" BASIS,
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| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 13 | * See the License for the specific language governing permissions and
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| 14 | * limitations under the License.
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| 15 | *
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| 16 | */
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| 17 |
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| 18 | package org.apache.felix.upnp.basedriver.export;
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| 19 | import java.util.ArrayList;
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| 20 | import java.util.Collection;
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| 21 | import java.util.Iterator;
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| 22 | import java.util.Vector;
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| 23 |
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| 24 | import org.osgi.framework.BundleContext;
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| 25 | import org.osgi.framework.ServiceReference;
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| 26 | import org.osgi.service.upnp.UPnPDevice;
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| 27 |
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Francesco Furfari | f2a6791 | 2006-07-17 17:08:02 +0000 | [diff] [blame^] | 28 | /*
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| 29 | * @author <a href="mailto:felix-dev@incubator.apache.org">Felix Project Team</a>
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| 30 | */
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Francesco Furfari | d8bdb64 | 2006-04-04 23:33:40 +0000 | [diff] [blame] | 31 | public class DeviceNode {
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| 32 |
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| 33 | private ServiceReference sr;
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| 34 | private boolean isRootNode;
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| 35 | private String udn ;
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| 36 | private boolean hasChild;
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| 37 | private int numberOfSons;
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| 38 | private ArrayList children;
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| 39 | private DeviceNode parent;
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| 40 |
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| 41 | public DeviceNode(ServiceReference sr){
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| 42 | //PRE: argument is always UPnPDevice service reference
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| 43 | if (sr == null)
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| 44 | throw new IllegalArgumentException("null is not a valid arg in DeviceNode constructor");
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| 45 | this.sr = sr;
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| 46 | udn = (String) sr.getProperty(UPnPDevice.UDN);
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| 47 | parent=null;
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| 48 | isRootNode = (sr.getProperty(UPnPDevice.PARENT_UDN) == null);
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| 49 | String[] sons = ((String[]) sr.getProperty(UPnPDevice.CHILDREN_UDN));
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| 50 | hasChild = (sons != null);
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| 51 | if (hasChild) {
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| 52 | children = new ArrayList();
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| 53 | numberOfSons = sons.length;
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| 54 | }
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| 55 | }
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| 56 |
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| 57 | public ServiceReference getReference(){
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| 58 | return sr;
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| 59 | }
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| 60 | public UPnPDevice getDevice(BundleContext ctx){
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| 61 | return (UPnPDevice)ctx.getService(sr);
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| 62 | }
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| 63 |
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| 64 | public void attach(DeviceNode node){
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| 65 | if (node == null)
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| 66 | throw new IllegalArgumentException("null is not a valid arg in DeviceNode.attach() method");
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| 67 | node.parent = this;
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| 68 | children.add(node);
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| 69 | }
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| 70 |
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| 71 | public DeviceNode dethatch(String name){
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| 72 | DeviceNode dn = this.search(name);
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| 73 | if(dn==null)
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| 74 | return null;
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| 75 |
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| 76 | if(dn.parent!=null){
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| 77 | Iterator list = dn.parent.children.iterator();
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| 78 | while (list.hasNext()) {
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| 79 | DeviceNode x = (DeviceNode) list.next();
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| 80 | if(x.udn.equals(name)){
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| 81 | list.remove();
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| 82 | break;
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| 83 | }
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| 84 | }
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| 85 | }
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| 86 | dn.parent=null;
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| 87 | return dn;
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| 88 | }
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| 89 |
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| 90 | public Collection getAllChildren(){
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| 91 | if((this.children==null)||(this.children.size()==0))
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| 92 | return null;
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| 93 |
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| 94 | Vector v = new Vector(this.children);
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| 95 | Iterator list = this.children.iterator();
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| 96 | while (list.hasNext()) {
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| 97 | DeviceNode x = (DeviceNode) list.next();
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| 98 | Collection c = x.getAllChildren();
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| 99 | if(c==null) continue;
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| 100 | v.addAll(c);
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| 101 | }
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| 102 | return v;
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| 103 | }
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| 104 |
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| 105 | public Collection getChildren(){
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| 106 | if((this.children==null)||(this.children.size()==0))
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| 107 | return null;
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| 108 | return this.children;
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| 109 | }
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| 110 |
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| 111 | /**
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| 112 | * @param name <code>String</code> that contain the UDN to look for
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| 113 | * @return return a <code>DeviceNode</code> that have the UDN equals to name and <br>
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| 114 | * if there is any <code>DeviceNode</code> with the proper UDN value return <code>null</code>
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| 115 | */
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| 116 | public DeviceNode search(String name){
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| 117 | if (name == null)
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| 118 | throw new IllegalArgumentException("null is not a valid arg in DeviceNode.search() method");
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| 119 | if (name.equals(udn))
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| 120 | return this;
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| 121 | else if (hasChild){
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| 122 | Iterator list = children.iterator();
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| 123 | while (list.hasNext()){
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| 124 | DeviceNode child = (DeviceNode)list.next();
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| 125 | DeviceNode node = child.search(name);
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| 126 | if (node != null) return node;
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| 127 | }
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| 128 | }
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| 129 | return null;
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| 130 | }
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| 131 |
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| 132 | /**
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| 133 | *
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| 134 | * @param udn
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| 135 | * @return <code>true</code> if and only if this <code>DeviceNode</code>
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| 136 | * contains a DeviceNode with UDN equals to passed argument or if
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| 137 | * its USN is equal to passed argument
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| 138 | */
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| 139 | public boolean contains(String udn){
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| 140 | return this.search(udn)!=null;
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| 141 | }
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| 142 |
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| 143 | public boolean isComplete(){
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| 144 | if (! hasChild) return true;
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| 145 | if (numberOfSons != children.size())return false;
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| 146 | Iterator list = children.iterator();
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| 147 | while (list.hasNext()){
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| 148 | DeviceNode child = (DeviceNode)list.next();
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| 149 | if (! child.isComplete()) return false;
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| 150 | }
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| 151 | return true;
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| 152 | }
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| 153 |
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| 154 | public DeviceNode isAttachable(DeviceNode node){
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| 155 | if (node == null)
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| 156 | throw new IllegalArgumentException("null is not a valid arg in DeviceNode.isAttachable() method");
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| 157 | String parentUDN=(String) node.getReference().getProperty(UPnPDevice.PARENT_UDN);
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| 158 | if(parentUDN==null) return null;
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| 159 | return search(parentUDN);
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| 160 | }
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| 161 |
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| 162 | public boolean isRoot(){
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| 163 | return isRootNode;
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| 164 | }
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| 165 |
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| 166 | public boolean equals(String udn){
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| 167 | return this.udn.equals(udn);
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| 168 | }
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| 169 |
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| 170 | public String toString(){
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| 171 | return udn;
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| 172 | }
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| 173 |
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| 174 | /**
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| 175 | * @return true if and only
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| 176 | * if the Device doesn't have embedded Device
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| 177 | */
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| 178 | public boolean isLeaf() {
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| 179 | return !hasChild;
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| 180 | }
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| 181 | }
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