package org.drools.decisiontable.parser;
/*
* Copyright 2005 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.util.LinkedList;
import java.util.List;
import java.util.StringTokenizer;
import org.drools.decisiontable.model.Global;
import org.drools.decisiontable.model.Import;
/**
* @author <a href="mailto:michael.neale@gmail.com"> Michael Neale </a>
*
* Parking lot for utility methods that don't belong anywhere else.
*/
public class RuleSheetParserUtil {
private RuleSheetParserUtil() {
// strictly util
}
public static String getRuleName(final String ruleRow) {
final int left = ruleRow.indexOf( DefaultRuleSheetListener.RULE_TABLE_TAG );
if ( ruleRow.indexOf( '(' ) > -1 || ruleRow.indexOf( ')' ) > -1 ) {
invalidRuleTableDef( ruleRow );
}
return ruleRow.substring( left + DefaultRuleSheetListener.RULE_TABLE_TAG.length() ).trim();
}
private static void invalidRuleTableDef(final String ruleRow) {
throw new IllegalArgumentException( "Invalid rule table header cell. Should be in the format of 'RuleTable YourRuleName'. " + "It was: \n [" + ruleRow + "] \n" );
}
/**
*
* @param importCell
* The cell text for all the classes to import.
* @return A list of Import classes, which can be added to the ruleset.
*/
public static List getImportList(final String importCell) {
final List importList = new LinkedList();
if ( importCell == null ) {
return importList;
}
final StringTokenizer tokens = new StringTokenizer( importCell,
"," );
while ( tokens.hasMoreTokens() ) {
final Import imp = new Import();
imp.setClassName( tokens.nextToken().trim() );
importList.add( imp );
}
return importList;
}
/**
* 08 - 18 - 2005
* Ricardo Rojas
* @param variableCell
* The cell text for all the application data variables to set.
* @return A list of Variable classes, which can be added to the ruleset.
*/
public static List getVariableList(final String variableCell) {
final List variableList = new LinkedList();
if ( variableCell == null ) {
return variableList;
}
final StringTokenizer tokens = new StringTokenizer( variableCell,
"," );
while ( tokens.hasMoreTokens() ) {
final String token = tokens.nextToken();
final Global vars = new Global();
final StringTokenizer paramTokens = new StringTokenizer( token,
" " );
vars.setClassName( paramTokens.nextToken() );
if ( !paramTokens.hasMoreTokens() ) {
throw new DecisionTableParseException( "The format for global variables is incorrect. " + "It should be: [Class name, Class otherName]. But it was: [" + variableCell + "]" );
}
vars.setIdentifier( paramTokens.nextToken() );
variableList.add( vars );
}
return variableList;
}
/**
* @return true is the String could possibly mean true. False otherwise !
*/
public static boolean isStringMeaningTrue(String property) {
if ( property == null ) {
return false;
} else {
property = property.trim();
if ( property.equalsIgnoreCase( "true" ) ) {
return true;
} else if ( property.startsWith( "Y" ) ) {
return true;
} else if ( property.startsWith( "y" ) ) {
return true;
} else if ( property.equalsIgnoreCase( "on" ) ) {
return true;
} else {
return false;
}
}
}
}