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Posted to commits@lenya.apache.org by eg...@apache.org on 2003/10/02 14:33:58 UTC
cvs commit: cocoon-lenya/src/java/org/apache/lenya/search Grep.java
egli 2003/10/02 05:33:58
Modified: src/java/org/apache/lenya/search Grep.java
Log:
Added a method to find all occurences of a pattern.
Revision Changes Path
1.3 +46 -2 cocoon-lenya/src/java/org/apache/lenya/search/Grep.java
Index: Grep.java
===================================================================
RCS file: /home/cvs/cocoon-lenya/src/java/org/apache/lenya/search/Grep.java,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -r1.2 -r1.3
--- Grep.java 30 Sep 2003 09:03:28 -0000 1.2
+++ Grep.java 2 Oct 2003 12:33:58 -0000 1.3
@@ -107,6 +107,50 @@
}
/**
+ * Find all occurences of pattern in a file.
+ *
+ * @param file the file to search for occurences of pattern
+ * @param pattern the pattern to search for
+ * @param group which group in the pattern to return
+ *
+ * @return an <code>array</code> of occurences of pattern
+ * (i.e. the groupth group of the match)
+ *
+ * @throws IOException if the file could not be read.
+ *
+ */
+ public static String[] findPattern(File file, Pattern pattern, int group)
+ throws IOException {
+
+ ArrayList occurences = new ArrayList();
+
+ // Open the file and then get a channel from the stream
+ FileInputStream fis = new FileInputStream(file);
+ FileChannel fc = fis.getChannel();
+
+ // Get the file's size and then map it into memory
+ int sz = (int)fc.size();
+ MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, sz);
+
+ // Decode the file into a char buffer
+ CharBuffer cb = decoder.decode(bb);
+
+ // Perform the search
+ Matcher pm = pattern.matcher(cb); // Pattern matcher
+
+ while (pm.find()) {
+ occurences.add(pm.group(group));
+ }
+
+ // Close the channel and the stream
+ fc.close();
+ fis.close();
+
+ return (String[])occurences.toArray(new String[occurences.size()]);
+
+ }
+
+ /**
* Find all files below the given file which contain the given pattern.
*
* @param file the file where to start the search for the pattern.
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