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26 changes: 26 additions & 0 deletions
26
api/kie-api/src/main/java/org/kie/submarine/rules/DataSource.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,26 @@ | ||
| package org.kie.submarine.rules; | ||
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| import org.kie.api.runtime.rule.FactHandle; | ||
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| public interface DataSource<T> { | ||
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| FactHandle add(T object ); | ||
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| /** | ||
| * Updates the fact for which the given FactHandle was assigned with the new | ||
| * fact set as the second parameter in this method. | ||
| * It is also possible to optionally specify the set of properties that have been modified. | ||
| * | ||
| * @param handle the FactHandle for the fact to be updated. | ||
| * @param object the new value for the fact being updated. | ||
| */ | ||
| void update(FactHandle handle, T object); | ||
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| /** | ||
| * Deletes the fact for which the given FactHandle was assigned | ||
| * | ||
| * @param handle the handle whose fact is to be retracted. | ||
| */ | ||
| void remove(FactHandle handle); | ||
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| } |
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api/kie-api/src/main/java/org/kie/submarine/rules/RuleUnit.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,5 @@ | ||
| package org.kie.submarine.rules; | ||
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| public interface RuleUnit<T> { | ||
| RuleUnitInstance<T> createInstance(T workingMemory); | ||
| } |
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6
api/kie-api/src/main/java/org/kie/submarine/rules/RuleUnitInstance.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,6 @@ | ||
| package org.kie.submarine.rules; | ||
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| public interface RuleUnitInstance<T> { | ||
| RuleUnit<T> unit(); | ||
| void fire(); | ||
| } |
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| package org.kie.submarine.rules; | ||
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| public @interface Unit { | ||
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| } |
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7
api/kie-api/src/main/java/org/kie/submarine/rules/impl/AbstractRuleUnit.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,7 @@ | ||
| package org.kie.submarine.rules.impl; | ||
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| import org.kie.submarine.rules.RuleUnit; | ||
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| public abstract class AbstractRuleUnit<T> implements RuleUnit<T> { | ||
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| } |
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50
api/kie-api/src/main/java/org/kie/submarine/rules/impl/AbstractRuleUnitInstance.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,50 @@ | ||
| package org.kie.submarine.rules.impl; | ||
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| import java.lang.reflect.Field; | ||
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| import org.kie.api.runtime.KieSession; | ||
| import org.kie.submarine.rules.RuleUnit; | ||
| import org.kie.submarine.rules.RuleUnitInstance; | ||
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| public class AbstractRuleUnitInstance<T> implements RuleUnitInstance<T> { | ||
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| private final T workingMemory; | ||
| private final RuleUnit<T> unit; | ||
| private final KieSession rt; | ||
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| public AbstractRuleUnitInstance(RuleUnit<T> unit, T workingMemory, KieSession rt) { | ||
| this.unit = unit; | ||
| this.rt = rt; | ||
| this.workingMemory = workingMemory; | ||
| } | ||
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| public void fire() { | ||
| magicReflectionThingie(rt, workingMemory); | ||
| rt.fireAllRules(); | ||
| } | ||
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| @Override | ||
| public RuleUnit<T> unit() { | ||
| return unit; | ||
| } | ||
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| public T workingMemory() { | ||
| return workingMemory; | ||
| } | ||
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| private void magicReflectionThingie(KieSession rt, T workingMemory) { | ||
| try { | ||
| for (Field f : workingMemory.getClass().getDeclaredFields()) { | ||
| f.setAccessible(true); | ||
| Object v = null; | ||
| v = f.get(workingMemory); | ||
| if (v instanceof ListDataSource) { | ||
| ListDataSource o = (ListDataSource) v; | ||
| o.drainInto(rt::insert); | ||
| } | ||
| } | ||
| } catch (IllegalAccessException e) { | ||
| throw new Error(e); | ||
| } | ||
| } | ||
| } |
41 changes: 41 additions & 0 deletions
41
api/kie-api/src/main/java/org/kie/submarine/rules/impl/ListDataSource.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,41 @@ | ||
| package org.kie.submarine.rules.impl; | ||
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| import java.util.ArrayList; | ||
| import java.util.Collection; | ||
| import java.util.Iterator; | ||
| import java.util.function.Consumer; | ||
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| import org.kie.api.runtime.rule.FactHandle; | ||
| import org.kie.submarine.rules.DataSource; | ||
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| public class ListDataSource<T> implements DataSource<T> { | ||
| ArrayList<T> values = new ArrayList<>(); | ||
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| public FactHandle add(T t) { | ||
| values.add(t); | ||
| return null; | ||
| } | ||
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| @Override | ||
| public void update(FactHandle handle, T object) { | ||
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| } | ||
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| @Override | ||
| public void remove(FactHandle handle) { | ||
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| } | ||
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| public void addAll(Collection<? extends T> ts) { | ||
| values.addAll(ts); | ||
| } | ||
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| public void drainInto(Consumer<Object> sink) { | ||
| Iterator<T> iter = values.iterator(); | ||
| while(iter.hasNext()) { | ||
| T t = iter.next(); | ||
| sink.accept(t); | ||
| iter.remove(); | ||
| } | ||
| } | ||
| } |
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