net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/util/Util.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2003 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.compiler.util;
  12
  13 import java.io.BufferedInputStream;
  14 import java.io.ByteArrayInputStream;
  15 import java.io.File;
  16 import java.io.FileInputStream;
  17 import java.io.IOException;
  18 import java.io.InputStream;
  19 import java.io.InputStreamReader;
  20 import java.util.Locale;
  21 import java.util.MissingResourceException;
  22 import java.util.ResourceBundle;
  23 import java.util.zip.ZipEntry;
  24 import java.util.zip.ZipFile;
  25
  26 import net.sourceforge.phpdt.core.compiler.CharOperation;
  27 import net.sourceforge.phpdt.internal.ui.util.PHPFileUtil;
  28
  29 public class Util {
  30
  31         public static String LINE_SEPARATOR = System.getProperty("line.separator"); //$NON-NLS-1$
  32         public static char[] LINE_SEPARATOR_CHARS = LINE_SEPARATOR.toCharArray();
  33         public final static char[] SUFFIX_class = ".class".toCharArray(); //$NON-NLS-1$
  34         public final static char[] SUFFIX_CLASS = ".CLASS".toCharArray(); //$NON-NLS-1$
  35         public final static char[] SUFFIX_java = ".java".toCharArray(); //$NON-NLS-1$
  36         public final static char[] SUFFIX_JAVA = ".JAVA".toCharArray(); //$NON-NLS-1$
  37         public final static char[] SUFFIX_jar = ".jar".toCharArray(); //$NON-NLS-1$
  38         public final static char[] SUFFIX_JAR = ".JAR".toCharArray(); //$NON-NLS-1$
  39         public final static char[] SUFFIX_zip = ".zip".toCharArray(); //$NON-NLS-1$
  40         public final static char[] SUFFIX_ZIP = ".ZIP".toCharArray(); //$NON-NLS-1$
  41
  42         private final static char[] DOUBLE_QUOTES = "''".toCharArray(); //$NON-NLS-1$
  43         private final static char[] SINGLE_QUOTE = "'".toCharArray(); //$NON-NLS-1$
  44         private static final int DEFAULT_READING_SIZE = 8192;
  45
  46         /* Bundle containing messages */
  47         protected static ResourceBundle bundle;
  48         private final static String bundleName =
  49                 "net.sourceforge.phpdt.internal.compiler.util.messages"; //$NON-NLS-1$
  50         static {
  51                 relocalize();
  52         }
  53         /**
  54          * Lookup the message with the given ID in this catalog and bind its
  55          * substitution locations with the given strings.
  56          */
  57         public static String bind(String id, String binding1, String binding2) {
  58                 return bind(id, new String[] { binding1, binding2 });
  59         }
  60         /**
  61          * Lookup the message with the given ID in this catalog and bind its
  62          * substitution locations with the given string.
  63          */
  64         public static String bind(String id, String binding) {
  65                 return bind(id, new String[] { binding });
  66         }
  67         /**
  68          * Lookup the message with the given ID in this catalog and bind its
  69          * substitution locations with the given string values.
  70          */
  71         public static String bind(String id, String[] bindings) {
  72                 if (id == null)
  73                         return "No message available"; //$NON-NLS-1$
  74                 String message = null;
  75                 try {
  76                         message = bundle.getString(id);
  77                 } catch (MissingResourceException e) {
  78                         // If we got an exception looking for the message, fail gracefully by just returning
  79                         // the id we were looking for.  In most cases this is semi-informative so is not too bad.
  80                         return "Missing message: " + id + " in: " + bundleName; //$NON-NLS-2$ //$NON-NLS-1$
  81                 }
  82                 // for compatibility with MessageFormat which eliminates double quotes in original message
  83                 char[] messageWithNoDoubleQuotes =
  84                         CharOperation.replace(message.toCharArray(), DOUBLE_QUOTES, SINGLE_QUOTE);
  85                 message = new String(messageWithNoDoubleQuotes);
  86
  87                 if (bindings == null)
  88                         return message;
  89
  90                 int length = message.length();
  91                 int start = -1;
  92                 int end = length;
  93                 StringBuffer output = new StringBuffer(80);
  94                 while (true) {
  95                         if ((end = message.indexOf('{', start)) > -1) {
  96                                 output.append(message.substring(start + 1, end));
  97                                 if ((start = message.indexOf('}', end)) > -1) {
  98                                         int index = -1;
  99                                         try {
 100                                                 index = Integer.parseInt(message.substring(end + 1, start));
 101                                                 output.append(bindings[index]);
 102                                         } catch (NumberFormatException nfe) {
 103                                                 output.append(message.substring(end + 1, start + 1));
 104                                         } catch (ArrayIndexOutOfBoundsException e) {
 105                                                 output.append("{missing " + Integer.toString(index) + "}");     //$NON-NLS-2$ //$NON-NLS-1$
 106                                         }
 107                                 } else {
 108                                         output.append(message.substring(end, length));
 109                                         break;
 110                                 }
 111                         } else {
 112                                 output.append(message.substring(start + 1, length));
 113                                 break;
 114                         }
 115                 }
 116                 return output.toString();
 117         }
 118         /**
 119          * Lookup the message with the given ID in this catalog
 120          */
 121         public static String bind(String id) {
 122                 return bind(id, (String[]) null);
 123         }
 124         /**
 125          * Creates a NLS catalog for the given locale.
 126          */
 127         public static void relocalize() {
 128                 try {
 129                         bundle = ResourceBundle.getBundle(bundleName, Locale.getDefault());
 130                 } catch(MissingResourceException e) {
 131                         System.out.println("Missing resource : " + bundleName.replace('.', '/') + ".properties for locale " + Locale.getDefault()); //$NON-NLS-1$//$NON-NLS-2$
 132                         throw e;
 133                 }
 134         }
 135         /**
 136          * Returns the given bytes as a char array using a given encoding (null means platform default).
 137          */
 138         public static char[] bytesToChar(byte[] bytes, String encoding) throws IOException {
 139
 140                 return getInputStreamAsCharArray(new ByteArrayInputStream(bytes), bytes.length, encoding);
 141
 142         }
 143         /**
 144          * Returns the contents of the given file as a byte array.
 145          * @throws IOException if a problem occured reading the file.
 146          */
 147         public static byte[] getFileByteContent(File file) throws IOException {
 148                 InputStream stream = null;
 149                 try {
 150                         stream = new BufferedInputStream(new FileInputStream(file));
 151                         return getInputStreamAsByteArray(stream, (int) file.length());
 152                 } finally {
 153                         if (stream != null) {
 154                                 try {
 155                                         stream.close();
 156                                 } catch (IOException e) {
 157                                 }
 158                         }
 159                 }
 160         }
 161         /**
 162          * Returns the contents of the given file as a char array.
 163          * When encoding is null, then the platform default one is used
 164          * @throws IOException if a problem occured reading the file.
 165          */
 166         public static char[] getFileCharContent(File file, String encoding) throws IOException {
 167                 InputStream stream = null;
 168                 try {
 169                         stream = new BufferedInputStream(new FileInputStream(file));
 170                         return Util.getInputStreamAsCharArray(stream, (int) file.length(), encoding);
 171                 } finally {
 172                         if (stream != null) {
 173                                 try {
 174                                         stream.close();
 175                                 } catch (IOException e) {
 176                                 }
 177                         }
 178                 }
 179         }
 180         /**
 181          * Returns the given input stream's contents as a byte array.
 182          * If a length is specified (ie. if length != -1), only length bytes
 183          * are returned. Otherwise all bytes in the stream are returned.
 184          * Note this doesn't close the stream.
 185          * @throws IOException if a problem occured reading the stream.
 186          */
 187         public static byte[] getInputStreamAsByteArray(InputStream stream, int length)
 188                 throws IOException {
 189                 byte[] contents;
 190                 if (length == -1) {
 191                         contents = new byte[0];
 192                         int contentsLength = 0;
 193                         int amountRead = -1;
 194                         do {
 195                                 int amountRequested = Math.max(stream.available(), DEFAULT_READING_SIZE);  // read at least 8K
 196
 197                                 // resize contents if needed
 198                                 if (contentsLength + amountRequested > contents.length) {
 199                                         System.arraycopy(
 200                                                 contents,
 201                                                 0,
 202                                                 contents = new byte[contentsLength + amountRequested],
 203                                                 0,
 204                                                 contentsLength);
 205                                 }
 206
 207                                 // read as many bytes as possible
 208                                 amountRead = stream.read(contents, contentsLength, amountRequested);
 209
 210                                 if (amountRead > 0) {
 211                                         // remember length of contents
 212                                         contentsLength += amountRead;
 213                                 }
 214                         } while (amountRead != -1);
 215
 216                         // resize contents if necessary
 217                         if (contentsLength < contents.length) {
 218                                 System.arraycopy(
 219                                         contents,
 220                                         0,
 221                                         contents = new byte[contentsLength],
 222                                         0,
 223                                         contentsLength);
 224                         }
 225                 } else {
 226                         contents = new byte[length];
 227                         int len = 0;
 228                         int readSize = 0;
 229                         while ((readSize != -1) && (len != length)) {
 230                                 // See PR 1FMS89U
 231                                 // We record first the read size. In this case len is the actual read size.
 232                                 len += readSize;
 233                                 readSize = stream.read(contents, len, length - len);
 234                         }
 235                 }
 236
 237                 return contents;
 238         }
 239         /**
 240          * Returns the given input stream's contents as a character array.
 241          * If a length is specified (ie. if length != -1), only length chars
 242          * are returned. Otherwise all chars in the stream are returned.
 243          * Note this doesn't close the stream.
 244          * @throws IOException if a problem occured reading the stream.
 245          */
 246         public static char[] getInputStreamAsCharArray(InputStream stream, int length, String encoding)
 247                 throws IOException {
 248                 InputStreamReader reader = null;
 249                 reader = encoding == null
 250                                         ? new InputStreamReader(stream)
 251                                         : new InputStreamReader(stream, encoding);
 252                 char[] contents;
 253                 if (length == -1) {
 254                         contents = CharOperation.NO_CHAR;
 255                         int contentsLength = 0;
 256                         int amountRead = -1;
 257                         do {
 258                                 int amountRequested = Math.max(stream.available(), DEFAULT_READING_SIZE);  // read at least 8K
 259
 260                                 // resize contents if needed
 261                                 if (contentsLength + amountRequested > contents.length) {
 262                                         System.arraycopy(
 263                                                 contents,
 264                                                 0,
 265                                                 contents = new char[contentsLength + amountRequested],
 266                                                 0,
 267                                                 contentsLength);
 268                                 }
 269
 270                                 // read as many chars as possible
 271                                 amountRead = reader.read(contents, contentsLength, amountRequested);
 272
 273                                 if (amountRead > 0) {
 274                                         // remember length of contents
 275                                         contentsLength += amountRead;
 276                                 }
 277                         } while (amountRead != -1);
 278
 279                         // resize contents if necessary
 280                         if (contentsLength < contents.length) {
 281                                 System.arraycopy(
 282                                         contents,
 283                                         0,
 284                                         contents = new char[contentsLength],
 285                                         0,
 286                                         contentsLength);
 287                         }
 288                 } else {
 289                         contents = new char[length];
 290                         int len = 0;
 291                         int readSize = 0;
 292                         while ((readSize != -1) && (len != length)) {
 293                                 // See PR 1FMS89U
 294                                 // We record first the read size. In this case len is the actual read size.
 295                                 len += readSize;
 296                                 readSize = reader.read(contents, len, length - len);
 297                         }
 298                         // See PR 1FMS89U
 299                         // Now we need to resize in case the default encoding used more than one byte for each
 300                         // character
 301                         if (len != length)
 302                                 System.arraycopy(contents, 0, (contents = new char[len]), 0, len);
 303                 }
 304
 305                 return contents;
 306         }
 307
 308         /**
 309          * Returns the contents of the given zip entry as a byte array.
 310          * @throws IOException if a problem occured reading the zip entry.
 311          */
 312         public static byte[] getZipEntryByteContent(ZipEntry ze, ZipFile zip)
 313                 throws IOException {
 314
 315                 InputStream stream = null;
 316                 try {
 317                         stream = new BufferedInputStream(zip.getInputStream(ze));
 318                         return getInputStreamAsByteArray(stream, (int) ze.getSize());
 319                 } finally {
 320                         if (stream != null) {
 321                                 try {
 322                                         stream.close();
 323                                 } catch (IOException e) {
 324                                 }
 325                         }
 326                 }
 327         }
 328         /**
 329          * Returns true iff str.toLowerCase().endsWith(".jar") || str.toLowerCase().endsWith(".zip")
 330          * implementation is not creating extra strings.
 331          */
 332         public final static boolean isArchiveFileName(String name) {
 333                 int nameLength = name == null ? 0 : name.length();
 334                 int suffixLength = SUFFIX_JAR.length;
 335                 if (nameLength < suffixLength) return false;
 336
 337                 // try to match as JAR file
 338                 for (int i = 0; i < suffixLength; i++) {
 339                         char c = name.charAt(nameLength - i - 1);
 340                         int suffixIndex = suffixLength - i - 1;
 341                         if (c != SUFFIX_jar[suffixIndex] && c != SUFFIX_JAR[suffixIndex]) {
 342
 343                                 // try to match as ZIP file
 344                                 suffixLength = SUFFIX_ZIP.length;
 345                                 if (nameLength < suffixLength) return false;
 346                                 for (int j = 0; j < suffixLength; j++) {
 347                                         c = name.charAt(nameLength - j - 1);
 348                                         suffixIndex = suffixLength - j - 1;
 349                                         if (c != SUFFIX_zip[suffixIndex] && c != SUFFIX_ZIP[suffixIndex]) return false;
 350                                 }
 351                                 return true;
 352                         }
 353                 }
 354                 return true;
 355         }
 356         /**
 357          * Returns true iff str.toLowerCase().endsWith(".class")
 358          * implementation is not creating extra strings.
 359          */
 360         public final static boolean isClassFileName(String name) {
 361                 int nameLength = name == null ? 0 : name.length();
 362                 int suffixLength = SUFFIX_CLASS.length;
 363                 if (nameLength < suffixLength) return false;
 364
 365                 for (int i = 0; i < suffixLength; i++) {
 366                         char c = name.charAt(nameLength - i - 1);
 367                         int suffixIndex = suffixLength - i - 1;
 368                         if (c != SUFFIX_class[suffixIndex] && c != SUFFIX_CLASS[suffixIndex]) return false;
 369                 }
 370                 return true;
 371         }
 372         /**
 373          * Returns true iff str.toLowerCase().endsWith(".java")
 374          * implementation is not creating extra strings.
 375          */
 376         public final static boolean isJavaFileName(String name) {
 377                 return PHPFileUtil.isPHPFileName(name);
 378 //              int nameLength = name == null ? 0 : name.length();
 379 //              int suffixLength = SUFFIX_JAVA.length;
 380 //              if (nameLength < suffixLength) return false;
 381 //
 382 //              for (int i = 0; i < suffixLength; i++) {
 383 //                      char c = name.charAt(nameLength - i - 1);
 384 //                      int suffixIndex = suffixLength - i - 1;
 385 //                      if (c != SUFFIX_java[suffixIndex] && c != SUFFIX_JAVA[suffixIndex]) return false;
 386 //              }
 387 //              return true;
 388         }
 389 }