Hi All , I am new to this drools technology and want to do a prototype for checking its feasibility for our use. Most of the places I believe it will work fine.. but I have a use case of parsing input files recd in different formats. Scenario: I have 2 input files 1. ############################## Test config Start 100 bytes available 250 bytes total 1000 bytes is my life goal ############################## 2: ############################## Test config Start 200 bytes available 300 bytes used 500 bytes total 2000 bytes is my life goal ############################## I have to extract the numbers from here and populate an output objects.. containing whatever value is possible.. so for the first instance I will be able to populate 3 values.. but for the second one I will be able to extract 4 values I wrote a file to work on the first case but I am unable to get it working. Can somebody help me to complete this prototype.. (I am very new to this so please pardon my ignorance.. I just looked at help file and am trying to build this :) ) Thanks for looking.. - Amit ########################################################### ParsingExample.java ########################################################### package org.drools.examples; import java.io.InputStreamReader; import org.drools.FactHandle; import org.drools.RuleBase; import org.drools.RuleBaseFactory; import org.drools.StatefulSession; import org.drools.audit.WorkingMemoryFileLogger; import org.drools.compiler.PackageBuilder; import java.util.*; public class ParsingExample { /** * @param args */ public static void main(final String[] args) throws Exception { final PackageBuilder builder = new PackageBuilder(); builder.addPackageFromDrl( new InputStreamReader( ParsingExample.class.getResourceAsStream( "Parsing.drl" ) ) ); final RuleBase ruleBase = RuleBaseFactory.newRuleBase(); ruleBase.addPackage( builder.getPackage() ); final StatefulSession session = ruleBase.newStatefulSession(); final WorkingMemoryFileLogger logger = new WorkingMemoryFileLogger( session ); logger.setFileName( "log/OutputObj" ); String config = ""; config += "Test config Start\n"; config += " 100 bytes available 250 bytes total\n"; config += " 1000 bytes is my life goal"; String[] configA = config.split("\n"); List configL = new ArrayList(); for (int i=0; i < configA.length; i++) { configL.add(new Row(configA )); } final Lines l1 = new Lines( configL ); final InputConfig a = new InputConfig( l1 ); final OutputObj t1 = new OutputObj(); session.insert( a ); session.insert( t1 ); config = ""; config += "Test config Start\n"; config += " 200 bytes available 300 bytes used 500 bytes total\n"; config += " 2000 bytes is my life goal"; configA = config.split("\n"); configL = new ArrayList(); for (int i=0; i < configA.length; i++) { configL.add(new Row(configA )); } final Lines l2 = new Lines( configL ); final InputConfig b = new InputConfig( l2 ); final OutputObj t2 = new OutputObj(); session.insert( b ); session.insert( t2 ); session.fireAllRules(); session.dispose(); logger.writeToDisk(); } public static class Row { private String val; public Row() { } public Row(final String val) { this.val = val; } public String getVal() { return this.val; } public String toString() { return "[Row " + " : " + this.val + "]"; } } public static class Lines { private List rows; public Lines() { } public Lines(final List rows) { this.rows = rows; } public List getRows() { return this.rows; } public String toString() { return "[Lines " + " : " + this.rows.toString() + "]"; } } public static class InputConfig { private Lines config; public InputConfig() { } public InputConfig(final Lines config) { this.config = config; } public Lines getConfig() { return this.config; } public String toString() { return "[InputConfig " + " : " + this.config.toString() + "]"; } } public static class OutputObj { private String bu = ""; private String ba = ""; private String bt = ""; private String blg = ""; public OutputObj() { } public String getBu() { return this.bu; } public void setBu(final String bu) { this.bu = bu; } public String getBa() { return this.ba; } public void setBa(final String ba) { this.ba = ba; } public String getBt() { return this.bt; } public void setBt(final String bt) { this.bt = bt; } public String getBlg() { return this.blg; } public void setBlg(final String blg) { this.blg = blg; } public String toString() { return "[OutputObj " + " used: " + this.bu +" avail: " + this.ba + " total: " + this.bt + " Goal: " + this.blg + "]"; } } } ########################################################### Parsing.drl ########################################################### package org.drools.examples import org.drools.examples.ParsingExample.InputConfig; import org.drools.examples.ParsingExample.OutputObj; import org.drools.examples.ParsingExample.Lines; import org.drools.examples.ParsingExample.Row; rule "get Bytes v10" salience 10 when $o : OutputObj() $i : InputConfig() InputConfig( $conf : config) $row : rows( val matches "^\\s*\\d+\s+bytes available\s+\d+\s+bytes total\s*$") from $i.config then eval($o.bu = /$row/^\s*(\d+)\s+bytes available\s+\d+\s+bytes total\s*$/) eval($o.bt = /$row/^\s*\d+\s+bytes available\s+(\d+)\s+bytes total\s*$/) System.out.println("BU:" + $o.bu); System.out.println("BT:" + $o.bt); end