Kumar, Vasanth wrote:
It seems that your expression is correct. Probably you are looking at the result instead of the groups.
I ran TestRegex.java with data.txt as the data you had, and expr.txt as: \s*type_name: deliver_sm\s*([^\f]*)\s*SMPP PDU dump ends.\s*
Below is the result I got. Note the result of Saved Group 1.
--------------------------------------------------------------------------- java TestRegex Contents: \s*type_name: deliver_sm\s*([^\f]*)\s*SMPP PDU dump ends.\s* Contents: 2003-03-07 17:20:33 [6] DEBUG: type_name: deliver_sm { many lines to follow. } 2003-03-07 17:20:33 [6] DEBUG: SMPP PDU dump ends.
RESULT: Match: type_name: deliver_sm { many lines to follow. } 2003-03-07 17:20:33 [6] DEBUG: SMPP PDU dump ends.
Length: 111 Groups: 2 Begin offset: 30 End offset: 141 Saved Groups: 1: { many lines to follow. } 2003-03-07 17:20:33 [6] DEBUG: Begin: 26 End: 90
---------------------------------------------------------------------------
-----Original Message----- From: Kwok Peng Tuck [mailto:[EMAIL PROTECTED] Sent: Sunday, March 09, 2003 11:55 PM To: [EMAIL PROTECTED] Subject: Regular expression help.
I'm trying to use a regular expression to obtain the contents of a text file say between the start and end (which can occur many times in the file):
2003-03-07 17:20:33 [6] DEBUG: type_name: deliver_sm { many lines to follow. } 2003-03-07 17:20:33 [6] DEBUG: SMPP PDU dump ends.
But the result doesn't seem to work, and will continue on until the end of the file.
Is there something wrong with my pattern ? My pattern looks like this :
String pattern = "\\s*type_name: deliver_sm\\s*([^\\f]*)\\s*SMPP PDU dump ends.\\s*"
I'm using the Perl5Compiler. What can I do to correct the pattern ? I'm kind of new at this.
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import java.util.*; import java.io.*;
import org.apache.oro.text.regex.PatternMatcher; import org.apache.oro.text.regex.PatternCompiler; import org.apache.oro.text.regex.Pattern; import org.apache.oro.text.regex.PatternMatcherInput; import org.apache.oro.text.regex.MatchResult; import org.apache.oro.text.regex.Util; import org.apache.oro.text.regex.Perl5Compiler; import org.apache.oro.text.regex.StringSubstitution; import org.apache.oro.text.regex.Perl5Matcher; import org.apache.oro.text.regex.MalformedPatternException;
public class TestRegex { public static void main(String[] args) { try { PatternMatcher oroMatcher; PatternCompiler oroCompiler; Pattern oroPattern; PatternMatcherInput oroInput;
String sExpr = readDataFromFile("expr.txt");
String sData = readDataFromFile("data.txt");
oroCompiler = new Perl5Compiler();
oroMatcher = new Perl5Matcher();
// oroPattern = oroCompiler.compile(sExpr, Perl5Compiler.CASE_INSENSITIVE_MASK);
try { oroPattern = oroCompiler.compile(sExpr); } catch(MalformedPatternException e) { throw new Exception("Bad pattern.", e); }
oroInput = new PatternMatcherInput(sData);
while (oroMatcher.contains(oroInput, oroPattern))
{
System.out.println();
System.out.println("RESULT:");
MatchResult result = oroMatcher.getMatch();
// Perform whatever processing on the result you want.
// Here we just print out all its elements to show how its
// methods are used.
System.out.println("Match: " + result.toString());
System.out.println("Length: " + result.length());
int groups = result.groups();
System.out.println("Groups: " + groups);
System.out.println("Begin offset: " + result.beginOffset(0));
System.out.println("End offset: " + result.endOffset(0));
System.out.println("Saved Groups: ");
// Start at 1 because we just printed out group 0
for (int group = 1; group < groups; group++)
{
System.out.println(group + ": " + result.group(group));
System.out.println("Begin: " + result.begin(group));
System.out.println("End: " + result.end(group));
}
}
}
catch (Exception e)
{
e.printStackTrace();
System.out.println(e);
StackTraceElement[] stackTraceArray = e.getStackTrace();
System.out.println("Size = " + stackTraceArray.length);
for (int i = 0; i < stackTraceArray.length; i++)
{
StackTraceElement element = stackTraceArray[i];
System.out.println("Class: " + element.getClassName());
System.out.println("File: " + element.getFileName());
System.out.println("Line: " + element.getLineNumber());
System.out.println("Method: " + element.getMethodName());
System.out.println(element.toString());
System.out.println("--------------------------------------------------------------");
}
}
}
static String readDataFromFile(String filename) throws Exception
{
final int bufferSize = 80;
Reader reader;
try
{
reader = new FileReader(filename);
}
catch (FileNotFoundException e)
{
throw new Exception("Error opening filename: " + filename, e);
}
char[] charBuffer = new char[bufferSize];
StringBuffer strBuf = new StringBuffer();
try
{
int amountRead = reader.read(charBuffer, 0, bufferSize);
while (amountRead != -1)
{
strBuf.append(charBuffer, 0, amountRead);
amountRead = reader.read(charBuffer, 0, bufferSize);
}
}
catch (IOException e)
{
throw new Exception("Error while reading file: " + filename, e);
}
System.out.println("Contents: " + strBuf.toString()); return strBuf.toString(); }
}
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