de.tsl2.nano.incubation.specification.rules

Class Rule<T>

java.lang.Object

de.tsl2.nano.incubation.specification.AbstractRunnable<T>

de.tsl2.nano.incubation.specification.rules.AbstractRule<T>

de.tsl2.nano.incubation.specification.rules.Rule<T>

All Implemented Interfaces:

de.tsl2.nano.core.execution.IRunnable<T,Map<String,Object>>, de.tsl2.nano.execution.IPRunnable<T,Map<String,Object>>, Serializable

public class Rule<T>
extends AbstractRule<T>

rule engine using operators (see Operator) for numeric and boolean values. rules can reference other rules through using '§' + name.

every rule defines parameters and an operation. the parameters will be checked against the arguments given on #execute(Map). additionally, there may be constraints for value ranges. Example:

 rule = new Rule<BigDecimal>("test", "A ? (x1 + 1) : (x2 * 2)", MapUtil.asMap("A",
     ParType.BOOLEAN,
     "x1",
     ParType.NUMBER,
     "x2",
     ParType.NUMBER));
 rule.addConstraint("x1", new Constraint(BigDecimal.class, new BigDecimal(0), new BigDecimal(1)));
 BigDecimal r2 = rule.execute(MapUtil.asMap("A", false, "x1", new BigDecimal(1), "x2", new BigDecimal(2)));
 
 or
 
         Rule ruleWithImport = new Rule("test-import", "A ? 1 + §test : (x2 * 3)", MapUtil.asMap("A",
             Boolean.class,
             "x1",
             BigDecimal.class,
             "x2",
             BigDecimal.class));
 
 
 
 

Version:

$Revision$

Author:

Tom, Thomas Schneider

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static String	KEY_RESULT

Fields inherited from class de.tsl2.nano.incubation.specification.rules.AbstractRule

initialized, PREFIX

Fields inherited from class de.tsl2.nano.incubation.specification.AbstractRunnable

constraints, name, operation, operationContent, parameter, specifications

Constructor Summary

Constructors

Constructor and Description
Rule() constructor only to be used by deserializing
Rule(String name, String operation, LinkedHashMap<String,ParType> parameter) constructor

Method Summary

Modifier and Type	Method and Description
protected void	initDeserializing()
T	run(Map<String,Object> arguments, Object... extArgs) executes the given rule, checking the given arguments.

Methods inherited from class de.tsl2.nano.incubation.specification.rules.AbstractRule

importSubRules, prefix

Methods inherited from class de.tsl2.nano.incubation.specification.AbstractRunnable

addConstraint, addSpecification, addSpecification, asSequence, checkConstraint, checkedArguments, checkSpecification, createConstraints, createParameters, createSimpleParameters, getName, getOperation, getParameter, getParameterList, markArgumentsAsSequence, parameters, setOperation, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

KEY_RESULT

public static final String KEY_RESULT

See Also:

Constant Field Values

Constructor Detail

Rule

public Rule()

constructor only to be used by deserializing

Rule

public Rule(String name,
            String operation,
            LinkedHashMap<String,ParType> parameter)

constructor

Parameters:

operation -

parameter -

Method Detail

run

public T run(Map<String,Object> arguments,
             Object... extArgs)

executes the given rule, checking the given arguments.

Parameters:

arguments - rule input

Returns:

evaluation result

initDeserializing

protected void initDeserializing()

Overrides:

initDeserializing in class AbstractRunnable<T>