net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpdt/internal/corext/template/php/TemplateSet.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2004 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package net.sourceforge.phpdt.internal.corext.template.php;
  12
  13 import java.io.File;
  14 import java.io.FileInputStream;
  15 import java.io.FileOutputStream;
  16 import java.io.IOException;
  17 import java.io.InputStream;
  18 import java.io.OutputStream;
  19 import java.util.ArrayList;
  20 import java.util.Iterator;
  21 import java.util.List;
  22 import java.util.MissingResourceException;
  23 import java.util.ResourceBundle;
  24
  25 import javax.xml.parsers.DocumentBuilder;
  26 import javax.xml.parsers.DocumentBuilderFactory;
  27 import javax.xml.parsers.ParserConfigurationException;
  28 import javax.xml.transform.OutputKeys;
  29 import javax.xml.transform.Transformer;
  30 import javax.xml.transform.TransformerException;
  31 import javax.xml.transform.TransformerFactory;
  32 import javax.xml.transform.dom.DOMSource;
  33 import javax.xml.transform.stream.StreamResult;
  34
  35 import org.eclipse.core.runtime.CoreException;
  36 import org.eclipse.core.runtime.IStatus;
  37 import org.eclipse.core.runtime.Status;
  38 import org.eclipse.jface.text.templates.ContextTypeRegistry;
  39 import org.eclipse.jface.text.templates.Template;
  40 import org.eclipse.jface.text.templates.TemplateContextType;
  41 import org.eclipse.jface.text.templates.TemplateException;
  42 import org.w3c.dom.Attr;
  43 import org.w3c.dom.Document;
  44 import org.w3c.dom.NamedNodeMap;
  45 import org.w3c.dom.Node;
  46 import org.w3c.dom.NodeList;
  47 import org.w3c.dom.Text;
  48 import org.xml.sax.InputSource;
  49 import org.xml.sax.SAXException;
  50
  51 /**
  52  * <code>TemplateSet</code> manages a collection of templates and makes them
  53  * persistent.
  54  *
  55  * @deprecated use TemplateStore instead
  56  * @since 3.0
  57  */
  58 public class TemplateSet {
  59
  60         private static final String NAME_ATTRIBUTE = "name"; //$NON-NLS-1$
  61
  62         private static final String DESCRIPTION_ATTRIBUTE = "description"; //$NON-NLS-1$
  63
  64         private static final String CONTEXT_ATTRIBUTE = "context"; //$NON-NLS-1$
  65
  66         private List fTemplates = new ArrayList();
  67
  68         private String fTemplateTag;
  69
  70         private static final int TEMPLATE_PARSE_EXCEPTION = 10002;
  71
  72         private static final int TEMPLATE_IO_EXCEPTION = 10005;
  73
  74         private ContextTypeRegistry fRegistry;
  75
  76         public TemplateSet(String templateTag, ContextTypeRegistry registry) {
  77                 fTemplateTag = templateTag;
  78                 fRegistry = registry;
  79         }
  80
  81         /**
  82          * Convenience method for reading templates from a file.
  83          *
  84          * @param file
  85          * @param allowDuplicates
  86          * @param bundle
  87          * @see #addFromStream(InputStream, boolean, boolean, ResourceBundle)
  88          * @throws CoreException
  89          */
  90         public void addFromFile(File file, boolean allowDuplicates,
  91                         ResourceBundle bundle) throws CoreException {
  92                 InputStream stream = null;
  93
  94                 try {
  95                         stream = new FileInputStream(file);
  96                         addFromStream(stream, allowDuplicates, false, bundle);
  97
  98                 } catch (IOException e) {
  99                         throwReadException(e);
 100
 101                 } finally {
 102                         try {
 103                                 if (stream != null)
 104                                         stream.close();
 105                         } catch (IOException e) {
 106                         }
 107                 }
 108         }
 109
 110         public String getTemplateTag() {
 111                 return fTemplateTag;
 112         }
 113
 114         /**
 115          * Reads templates from a XML stream and adds them to the templates
 116          *
 117          * @param stream
 118          * @param allowDuplicates
 119          * @param bundle
 120          * @param doTranslations
 121          * @see #addFromStream(InputStream, boolean, boolean, ResourceBundle)
 122          * @throws CoreException
 123          */
 124         public void addFromStream(InputStream stream, boolean allowDuplicates,
 125                         boolean doTranslations, ResourceBundle bundle) throws CoreException {
 126                 try {
 127                         DocumentBuilderFactory factory = DocumentBuilderFactory
 128                                         .newInstance();
 129                         DocumentBuilder parser = factory.newDocumentBuilder();
 130                         Document document = parser.parse(new InputSource(stream));
 131
 132                         NodeList elements = document.getElementsByTagName(getTemplateTag());
 133
 134                         int count = elements.getLength();
 135                         for (int i = 0; i != count; i++) {
 136                                 Node node = elements.item(i);
 137                                 NamedNodeMap attributes = node.getAttributes();
 138
 139                                 if (attributes == null)
 140                                         continue;
 141
 142                                 String name = getAttributeValue(attributes, NAME_ATTRIBUTE);
 143                                 String description = getAttributeValue(attributes,
 144                                                 DESCRIPTION_ATTRIBUTE);
 145                                 if (name == null || description == null)
 146                                         continue;
 147
 148                                 if (doTranslations) {
 149                                         description = translateString(description, bundle);
 150                                 }
 151                                 String context = getAttributeValue(attributes,
 152                                                 CONTEXT_ATTRIBUTE);
 153
 154                                 if (name == null || description == null || context == null)
 155                                         throw new SAXException(JavaTemplateMessages
 156                                                         .getString("TemplateSet.error.missing.attribute")); //$NON-NLS-1$
 157
 158                                 StringBuffer buffer = new StringBuffer();
 159                                 NodeList children = node.getChildNodes();
 160                                 for (int j = 0; j != children.getLength(); j++) {
 161                                         String value = children.item(j).getNodeValue();
 162                                         if (value != null)
 163                                                 buffer.append(value);
 164                                 }
 165                                 String pattern = buffer.toString().trim();
 166                                 if (doTranslations) {
 167                                         pattern = translateString(pattern, bundle);
 168                                 }
 169
 170                                 Template template = new Template(name, description, context,
 171                                                 pattern);
 172
 173                                 String message = validateTemplate(template);
 174                                 if (message == null) {
 175                                         if (!allowDuplicates) {
 176                                                 Template[] templates = getTemplates(name);
 177                                                 for (int k = 0; k < templates.length; k++) {
 178                                                         remove(templates[k]);
 179                                                 }
 180                                         }
 181                                         add(template);
 182                                 } else {
 183                                         throwReadException(null);
 184                                 }
 185                         }
 186                 } catch (ParserConfigurationException e) {
 187                         throwReadException(e);
 188                 } catch (IOException e) {
 189                         throwReadException(e);
 190                 } catch (SAXException e) {
 191                         throwReadException(e);
 192                 }
 193         }
 194
 195         private String translateString(String str, ResourceBundle bundle) {
 196                 int idx = str.indexOf('%');
 197                 if (idx == -1) {
 198                         return str;
 199                 }
 200                 StringBuffer buf = new StringBuffer();
 201                 int k = 0;
 202                 while (idx != -1) {
 203                         buf.append(str.substring(k, idx));
 204                         for (k = idx + 1; k < str.length()
 205                                         && !Character.isWhitespace(str.charAt(k)); k++) {
 206                                 // loop
 207                         }
 208                         String key = str.substring(idx + 1, k);
 209                         buf.append(getBundleString(key, bundle));
 210                         idx = str.indexOf('%', k);
 211                 }
 212                 buf.append(str.substring(k));
 213                 return buf.toString();
 214         }
 215
 216         private String getBundleString(String key, ResourceBundle bundle) {
 217                 if (bundle != null) {
 218                         try {
 219                                 return bundle.getString(key);
 220                         } catch (MissingResourceException e) {
 221                                 return '!' + key + '!';
 222                         }
 223                 } else
 224                         return JavaTemplateMessages.getString(key); // default messages
 225         }
 226
 227         protected String validateTemplate(Template template) {
 228                 TemplateContextType type = fRegistry.getContextType(template
 229                                 .getContextTypeId());
 230                 if (type == null) {
 231                         return "Unknown context type: " + template.getContextTypeId(); //$NON-NLS-1$
 232                 }
 233                 try {
 234                         type.validate(template.getPattern());
 235                         return null;
 236                 } catch (TemplateException e) {
 237                         return e.getMessage();
 238                 }
 239         }
 240
 241         private String getAttributeValue(NamedNodeMap attributes, String name) {
 242                 Node node = attributes.getNamedItem(name);
 243
 244                 return node == null ? null : node.getNodeValue();
 245         }
 246
 247         /**
 248          * Convenience method for saving to a file.
 249          *
 250          * @see #saveToStream(OutputStream)
 251          */
 252         public void saveToFile(File file) throws CoreException {
 253                 OutputStream stream = null;
 254
 255                 try {
 256                         stream = new FileOutputStream(file);
 257                         saveToStream(stream);
 258
 259                 } catch (IOException e) {
 260                         throwWriteException(e);
 261
 262                 } finally {
 263                         try {
 264                                 if (stream != null)
 265                                         stream.close();
 266                         } catch (IOException e) {
 267                         }
 268                 }
 269         }
 270
 271         /**
 272          * Saves the template set as XML.
 273          */
 274         public void saveToStream(OutputStream stream) throws CoreException {
 275                 try {
 276                         DocumentBuilderFactory factory = DocumentBuilderFactory
 277                                         .newInstance();
 278                         DocumentBuilder builder = factory.newDocumentBuilder();
 279                         Document document = builder.newDocument();
 280
 281                         Node root = document.createElement("templates"); //$NON-NLS-1$
 282                         document.appendChild(root);
 283
 284                         for (int i = 0; i != fTemplates.size(); i++) {
 285                                 Template template = (Template) fTemplates.get(i);
 286
 287                                 Node node = document.createElement(getTemplateTag());
 288                                 root.appendChild(node);
 289
 290                                 NamedNodeMap attributes = node.getAttributes();
 291
 292                                 Attr name = document.createAttribute(NAME_ATTRIBUTE);
 293                                 name.setValue(template.getName());
 294                                 attributes.setNamedItem(name);
 295
 296                                 Attr description = document
 297                                                 .createAttribute(DESCRIPTION_ATTRIBUTE);
 298                                 description.setValue(template.getDescription());
 299                                 attributes.setNamedItem(description);
 300
 301                                 Attr context = document.createAttribute(CONTEXT_ATTRIBUTE);
 302                                 context.setValue(template.getContextTypeId());
 303                                 attributes.setNamedItem(context);
 304
 305                                 Text pattern = document.createTextNode(template.getPattern());
 306                                 node.appendChild(pattern);
 307                         }
 308
 309                         Transformer transformer = TransformerFactory.newInstance()
 310                                         .newTransformer();
 311                         transformer.setOutputProperty(OutputKeys.METHOD, "xml"); //$NON-NLS-1$
 312                         transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8"); //$NON-NLS-1$
 313                         DOMSource source = new DOMSource(document);
 314                         StreamResult result = new StreamResult(stream);
 315
 316                         transformer.transform(source, result);
 317
 318                 } catch (ParserConfigurationException e) {
 319                         throwWriteException(e);
 320                 } catch (TransformerException e) {
 321                         throwWriteException(e);
 322                 }
 323         }
 324
 325         private static void throwReadException(Throwable t) throws CoreException {
 326                 int code;
 327                 if (t instanceof SAXException)
 328                         code = TEMPLATE_PARSE_EXCEPTION;
 329                 else
 330                         code = TEMPLATE_IO_EXCEPTION;
 331                 // IStatus status= JavaUIStatus.createError(code,
 332                 // TemplateMessages.getString("TemplateSet.error.read"), t);
 333                 // //$NON-NLS-1$
 334                 // throw new JavaUIException(status);
 335                 throw new CoreException(
 336                                 new Status(
 337                                                 IStatus.ERROR,
 338                                                 "org.eclipse.jface.text", code, JavaTemplateMessages.getString("TemplateSet.error.read"), t)); //$NON-NLS-1$ //$NON-NLS-2$
 339         }
 340
 341         private static void throwWriteException(Throwable t) throws CoreException {
 342                 // IStatus status=
 343                 // JavaUIStatus.createError(IJavaStatusConstants.TEMPLATE_IO_EXCEPTION,
 344                 // TemplateMessages.getString("TemplateSet.error.write"), t);
 345                 // //$NON-NLS-1$
 346                 // throw new JavaUIException(status);
 347                 throw new CoreException(
 348                                 new Status(
 349                                                 IStatus.ERROR,
 350                                                 "org.eclipse.jface.text", TEMPLATE_IO_EXCEPTION, JavaTemplateMessages.getString("TemplateSet.error.write"), t)); //$NON-NLS-1$ //$NON-NLS-2$
 351         }
 352
 353         /**
 354          * Adds a template to the set.
 355          */
 356         public void add(Template template) {
 357                 if (exists(template))
 358                         return; // ignore duplicate
 359
 360                 fTemplates.add(template);
 361         }
 362
 363         private boolean exists(Template template) {
 364                 for (Iterator iterator = fTemplates.iterator(); iterator.hasNext();) {
 365                         Template anotherTemplate = (Template) iterator.next();
 366
 367                         if (template.equals(anotherTemplate))
 368                                 return true;
 369                 }
 370
 371                 return false;
 372         }
 373
 374         /**
 375          * Removes a template to the set.
 376          */
 377         public void remove(Template template) {
 378                 fTemplates.remove(template);
 379         }
 380
 381         /**
 382          * Empties the set.
 383          */
 384         public void clear() {
 385                 fTemplates.clear();
 386         }
 387
 388         /**
 389          * Returns all templates.
 390          */
 391 //      public Template[] getTemplates() {
 392 //              return (Template[]) fTemplates.toArray(new Template[fTemplates.size()]);
 393 //      }
 394
 395         /**
 396          * Returns all templates with a given name.
 397          */
 398         public Template[] getTemplates(String name) {
 399                 ArrayList res = new ArrayList();
 400                 for (Iterator iterator = fTemplates.iterator(); iterator.hasNext();) {
 401                         Template curr = (Template) iterator.next();
 402                         if (curr.getName().equals(name)) {
 403                                 res.add(curr);
 404                         }
 405                 }
 406                 return (Template[]) res.toArray(new Template[res.size()]);
 407         }
 408
 409         /**
 410          * Returns the first templates with the given name.
 411          */
 412 //      public Template getFirstTemplate(String name) {
 413 //              for (Iterator iterator = fTemplates.iterator(); iterator.hasNext();) {
 414 //                      Template curr = (Template) iterator.next();
 415 //                      if (curr.getName().equals(name)) {
 416 //                              return curr;
 417 //                      }
 418 //              }
 419 //              return null;
 420 //      }
 421
 422 }