/**
* Copyright 2004-2011 DTRules.com, Inc.
*
* See http://DTRules.com for updates and documentation for the DTRules Rules Engine
*
* 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.
**/
package com.dtrules.interpreter.operators;
import com.dtrules.infrastructure.RulesException;
import com.dtrules.interpreter.RBoolean;
import com.dtrules.interpreter.RInteger;
import com.dtrules.interpreter.RString;
import com.dtrules.session.DTState;
public class RStringOps {
static {
new Stringlength(); new Touppercase(); new Tolowercase(); new Trim();
new substring(); new RegexMatch(); new Indexof(); new StrConcat();
}
/**
* ( string -- length ) returns the length of the given string
* @author paul snow
*
*/
public static class Stringlength extends ROperator {
Stringlength(){super("strlength");}
@Override
public void execute(DTState state) throws RulesException {
String str = state.datapop().stringValue();
RInteger len = RInteger.getRIntegerValue(str.length());
state.datapush(len);
}
}
/**
* ( String -- String ) converts the string to uppercase.
* @author paul snow
*
*/
public static class Touppercase extends ROperator {
Touppercase(){super("touppercase");}
@Override
public void execute(DTState state) throws RulesException {
String str = state.datapop().stringValue();
String str2 = str.toUpperCase();
state.datapush(RString.newRString(str2));
}
}
/**
* ( String -- String ) converts the string to lowercase
* @author paul snow
*
*/
public static class Tolowercase extends ROperator {
Tolowercase(){super("tolowercase");}
@Override
public void execute(DTState state) throws RulesException {
String str = state.datapop().stringValue();
String str2 = str.toLowerCase();
state.datapush(RString.newRString(str2));
}
}
/**
* ( string -- string ) Trims the string, per trim in Java
* @author paul snow
*
*/
public static class Trim extends ROperator {
Trim(){super("trim");}
@Override
public void execute(DTState state) throws RulesException {
String str = state.datapop().stringValue();
String str2 = str.trim();
state.datapush(RString.newRString(str2));
}
}
/**
* (endindex beginindex string -- substring ) Returns the substring
* @author paul snow
*
*/
public static class substring extends ROperator {
substring(){super("substring");}
@Override
public void execute(DTState state) throws RulesException {
String str = state.datapop().stringValue();
int b = state.datapop().intValue();
int e = state.datapop().intValue();
String str2 = str.substring(b,e);
state.datapush(RString.newRString(str2));
}
}
/**
* ( regex String -- boolean ) Returns true if the given string is matched
* by the given regular expression.
*
* @author Paul Snow
*
*/
public static class RegexMatch extends ROperator {
RegexMatch(){super("regexmatch");}
@Override
public void execute(DTState state) throws RulesException {
String string = state.datapop().stringValue();
String regex = state.datapop().stringValue();
boolean b = string.matches(regex);
state.datapush( RBoolean.getRBoolean(b));
}
}
/**
* ( String1 String2 -- int ) Returns the index of String1 in String2. Returns -1
* if String1 is not a part of String2
*
* @author Paul Snow
*
*/
public static class Indexof extends ROperator {
Indexof(){super("indexof");}
@Override
public void execute(DTState state) throws RulesException {
String string2 = state.datapop().stringValue();
String string1 = state.datapop().stringValue();
int index = string2.indexOf(string1);
state.datapush( RInteger.getRIntegerValue(index));
}
}
/**
* StrConcat( String String -- String )
* StrConcat Operator, add the given two strings and returns a string value
*/
public static class StrConcat extends ROperator {
StrConcat(){super("s+"); alias("strconcat");}
public void execute(DTState state) throws RulesException {
String value2 = state.datapop().stringValue();
String value1 = state.datapop().stringValue();
state.datapush(RString.newRString(value1+value2));
}
}
}