Richard S. Hall | 7fa1415 | 2006-06-14 15:22:03 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2006 The Apache Software Foundation |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | * |
| 16 | */ |
| 17 | package org.apache.felix.ipojo.metadata; |
| 18 | |
| 19 | /** |
| 20 | * Element. |
Richard S. Hall | be279fc | 2006-06-22 12:56:53 +0000 | [diff] [blame] | 21 | * @author <a href="mailto:felix-dev@incubator.apache.org">Felix Project Team</a> |
Richard S. Hall | 7fa1415 | 2006-06-14 15:22:03 +0000 | [diff] [blame] | 22 | */ |
| 23 | public class Element { |
| 24 | |
| 25 | /** |
| 26 | * Name of the element. |
| 27 | */ |
| 28 | private String m_name; |
| 29 | |
| 30 | /** |
| 31 | * Name space of the element. |
| 32 | */ |
| 33 | private String m_nameSpace; |
| 34 | |
| 35 | /** |
| 36 | * List of the attributes of the element. |
| 37 | */ |
| 38 | private Attribute[] m_attributes = new Attribute[0]; |
| 39 | |
| 40 | /** |
| 41 | * List of the subelement of the element. |
| 42 | */ |
| 43 | private Element[] m_elements = new Element[0]; |
| 44 | |
| 45 | /** |
| 46 | * Constructor. |
| 47 | * @param name : the name of the element |
| 48 | * @pram ns : the namespace of the element |
| 49 | */ |
| 50 | public Element(String name, String ns) { |
| 51 | m_name = name.toLowerCase(); |
| 52 | m_nameSpace = ns; |
| 53 | } |
| 54 | |
| 55 | /** |
| 56 | * @return the sub elements |
| 57 | */ |
| 58 | public Element[] getElements() { return m_elements; } |
| 59 | |
| 60 | /** |
| 61 | * @return the attributes |
| 62 | */ |
| 63 | public Attribute[] getAttributes() { return m_attributes; } |
| 64 | |
| 65 | /** |
| 66 | * @return the name of the element |
| 67 | */ |
| 68 | public String getName() { return m_name; } |
| 69 | |
| 70 | /** |
| 71 | * @return the namespace of the element |
| 72 | */ |
| 73 | public String getNameSpace() { return m_nameSpace; } |
| 74 | |
| 75 | /** |
| 76 | * Return the value of the attribute given in parameter. |
| 77 | * @param name : the name of the searched attribute |
| 78 | * @return the value of the attrbitue given in parameter, null if the attribute does not exist |
| 79 | */ |
| 80 | public String getAttribute(String name) { |
| 81 | name = name.toLowerCase(); |
| 82 | for (int i = 0; i < m_attributes.length; i++) { |
| 83 | if (m_attributes[i].getName().equals(name)) { |
| 84 | return m_attributes[i].getValue(); |
| 85 | } |
| 86 | } |
| 87 | System.err.println("[Error in Metadata] The attribute " + name + " does not exist in " + m_name + " [" + m_nameSpace + "]"); |
| 88 | return null; |
| 89 | } |
| 90 | |
| 91 | /** |
| 92 | * Return the value of the attrbitue "name" of the namespace "ns". |
| 93 | * @param name : name of the attribute to find |
| 94 | * @param ns : namespace of the attribute to find |
| 95 | * @return the String value of the attribute, or null if the attribute is not found. |
| 96 | */ |
| 97 | public String getAttribute(String name, String ns) { |
| 98 | name = name.toLowerCase(); |
| 99 | for (int i = 0; i < m_attributes.length; i++) { |
| 100 | if (m_attributes[i].getName().equals(name) && m_attributes[i].getNameSpace().equals(ns)) { |
| 101 | return m_attributes[i].getValue(); |
| 102 | } |
| 103 | } |
| 104 | System.err.println("[Error in Metadata] The attribute " + name + "[" + ns + "] does not exist in " + m_name + " [" + m_nameSpace + "]"); |
| 105 | return null; |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * Add a subelement. |
| 110 | * @param elem : the element to add |
| 111 | */ |
| 112 | public void addElement(Element elem) { |
| 113 | for (int i = 0; (m_elements != null) && (i < m_elements.length); i++) { |
| 114 | if (m_elements[i] == elem) { return; } |
| 115 | } |
| 116 | |
| 117 | if (m_elements != null) { |
| 118 | Element[] newElementsList = new Element[m_elements.length + 1]; |
| 119 | System.arraycopy(m_elements, 0, newElementsList, 0, m_elements.length); |
| 120 | newElementsList[m_elements.length] = elem; |
| 121 | m_elements = newElementsList; |
| 122 | } |
| 123 | else { m_elements = new Element[] {elem}; } |
| 124 | } |
| 125 | |
| 126 | private static Element[] addElement(Element[] list, Element elem) { |
| 127 | if (list != null) { |
| 128 | Element[] newElementsList = new Element[list.length + 1]; |
| 129 | System.arraycopy(list, 0, newElementsList, 0, list.length); |
| 130 | newElementsList[list.length] = elem; |
| 131 | return newElementsList; |
| 132 | } |
| 133 | else { return new Element[] {elem}; } |
| 134 | } |
| 135 | |
| 136 | /** |
| 137 | * Remove a subelement. |
| 138 | * @param elem : the element to remove |
| 139 | */ |
| 140 | public void removeElement(Element elem) { |
| 141 | int idx = -1; |
| 142 | for (int i = 0; i < m_elements.length; i++) { |
| 143 | if (m_elements[i] == elem) { idx = i; break; } |
| 144 | } |
| 145 | |
| 146 | if (idx >= 0) { |
| 147 | if ((m_elements.length - 1) == 0) { m_elements = new Element[0]; } |
| 148 | else { |
| 149 | Element[] newElementsList = new Element[m_elements.length - 1]; |
| 150 | System.arraycopy(m_elements, 0, newElementsList, 0, idx); |
| 151 | if (idx < newElementsList.length) { |
| 152 | System.arraycopy(m_elements, idx + 1, newElementsList, idx, newElementsList.length - idx); } |
| 153 | m_elements = newElementsList; |
| 154 | } |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | /** |
| 159 | * Add a attribute. |
| 160 | * @param att : the attribute to add |
| 161 | */ |
| 162 | public void addAttribute(Attribute att) { |
| 163 | for (int i = 0; (m_attributes != null) && (i < m_attributes.length); i++) { |
| 164 | if (m_attributes[i] == att) { return; } |
| 165 | } |
| 166 | |
| 167 | if (m_attributes != null) { |
| 168 | Attribute[] newAttributesList = new Attribute[m_attributes.length + 1]; |
| 169 | System.arraycopy(m_attributes, 0, newAttributesList, 0, m_attributes.length); |
| 170 | newAttributesList[m_attributes.length] = att; |
| 171 | m_attributes = newAttributesList; |
| 172 | } |
| 173 | else { m_attributes = new Attribute[] {att}; } |
| 174 | } |
| 175 | |
| 176 | /** |
| 177 | * Remove an attribute. |
| 178 | * @param att : the attribute to remove |
| 179 | */ |
| 180 | public void removeAttribute(Attribute att) { |
| 181 | int idx = -1; |
| 182 | for (int i = 0; i < m_attributes.length; i++) { |
| 183 | if (m_attributes[i] == att) { idx = i; break; } |
| 184 | } |
| 185 | |
| 186 | if (idx >= 0) { |
| 187 | if ((m_attributes.length - 1) == 0) { m_attributes = new Attribute[0]; } |
| 188 | else { |
| 189 | Attribute[] newAttributesList = new Attribute[m_attributes.length - 1]; |
| 190 | System.arraycopy(m_attributes, 0, newAttributesList, 0, idx); |
| 191 | if (idx < newAttributesList.length) { |
| 192 | System.arraycopy(m_attributes, idx + 1, newAttributesList, idx, newAttributesList.length - idx); } |
| 193 | m_attributes = newAttributesList; |
| 194 | } |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | /** |
| 199 | * Get the elements array of the element type given in parameter. |
| 200 | * This method look for an empty namespace. |
| 201 | * @param name : the type of the element to find (element name) |
| 202 | * @return the resulting element array (empty if the search failed) |
| 203 | */ |
| 204 | public Element[] getElements(String name) { |
| 205 | name = name.toLowerCase(); |
| 206 | Element[] list = new Element[0]; |
| 207 | for (int i = 0; i < m_elements.length; i++) { |
| 208 | if (m_elements[i].getName().equals(name) && m_elements[i].getNameSpace().equals("")) { |
| 209 | list = Element.addElement(list, m_elements[i]); |
| 210 | } |
| 211 | } |
| 212 | return list; |
| 213 | } |
| 214 | |
| 215 | /** |
| 216 | * Get the elements array of the element type given in parameter. |
| 217 | * @param name : the type of the element to find (element name) |
| 218 | * @param ns : the namespace of the element |
| 219 | * @return the resulting element array (empty if the search failed) |
| 220 | */ |
| 221 | public Element[] getElements(String name, String ns) { |
| 222 | name = name.toLowerCase(); |
| 223 | Element[] list = new Element[0]; |
| 224 | for (int i = 0; i < m_elements.length; i++) { |
| 225 | if (m_elements[i].getName().equals(name) && m_elements[i].getNameSpace().equals(ns)) { |
| 226 | list = Element.addElement(list, m_elements[i]); |
| 227 | } |
| 228 | } |
| 229 | return list; |
| 230 | } |
| 231 | |
| 232 | /** |
| 233 | * Is the element contains a subelement of the type given in parameter. |
| 234 | * This method does not manage the namespace |
| 235 | * @param name : type of the element to check. |
| 236 | * @return true if the element contains an element of the type "name" |
| 237 | */ |
| 238 | public boolean containsElement(String name) { |
| 239 | name = name.toLowerCase(); |
| 240 | for (int i = 0; i < m_elements.length; i++) { |
| 241 | if (m_elements[i].getName().equals(name)) { return true; } |
| 242 | } |
| 243 | return false; |
| 244 | } |
| 245 | |
| 246 | /** |
| 247 | * Is the element contains a subelement of the type given in parameter. |
| 248 | * This method does not manage the namespace |
| 249 | * @param name : type of the element to check. |
| 250 | * @return true if the element contains an element of the type "name" |
| 251 | */ |
| 252 | public boolean containsElement(String name, String ns) { |
| 253 | name = name.toLowerCase(); |
| 254 | ns = ns.toLowerCase(); |
| 255 | for (int i = 0; i < m_elements.length; i++) { |
| 256 | if (m_elements[i].getName().equals(name) && m_elements[i].getNameSpace().equals(ns)) { return true; } |
| 257 | } |
| 258 | return false; |
| 259 | } |
| 260 | |
| 261 | /** |
| 262 | * Is the element contains an attribute of the name given in parameter. |
| 263 | * @param name : name of the element |
| 264 | * @return true if the element contains an attribute of the type "name" |
| 265 | */ |
| 266 | public boolean containsAttribute(String name) { |
| 267 | name = name.toLowerCase(); |
| 268 | for (int i = 0; i < m_attributes.length; i++) { |
| 269 | if (m_attributes[i].getName().equals(name)) { return true; } |
| 270 | } |
| 271 | return false; |
| 272 | } |
| 273 | |
| 274 | /** |
| 275 | * @return the first-order namespaces list of the current element. First-order namespace are namespace of the element attribute and namespaces of its direct sub-element. |
| 276 | */ |
| 277 | public String[] getNamespaces() { |
| 278 | String[] ns = new String[0]; |
| 279 | |
| 280 | // Look for each direct sub-element |
| 281 | for (int i = 0; i < m_elements.length; i++) { |
| 282 | boolean found = false; |
| 283 | for (int j = 0; !found && j < ns.length; j++) { |
| 284 | if (ns[j].equals(m_elements[i].getNameSpace())) { found = true; } |
| 285 | } |
| 286 | if (!found) { |
| 287 | String[] newNSList = new String[ns.length + 1]; |
| 288 | System.arraycopy(ns, 0, newNSList, 0, ns.length); |
| 289 | newNSList[ns.length] = m_elements[i].getNameSpace(); |
| 290 | ns = newNSList; |
| 291 | } |
| 292 | } |
| 293 | |
| 294 | // Look for each attribute |
| 295 | for (int i = 0; i < m_attributes.length; i++) { |
| 296 | boolean found = false; |
| 297 | for (int j = 0; !found && j < ns.length; j++) { |
| 298 | if (ns[j].equals(m_attributes[i].getNameSpace())) { found = true; } |
| 299 | } |
| 300 | if (!found) { |
| 301 | String[] newNSList = new String[ns.length + 1]; |
| 302 | System.arraycopy(ns, 0, newNSList, 0, ns.length); |
| 303 | newNSList[ns.length] = m_attributes[i].getNameSpace(); |
| 304 | ns = newNSList; |
| 305 | } |
| 306 | } |
| 307 | |
| 308 | return ns; |
| 309 | } |
| 310 | |
| 311 | } |