Examples of KnowledgeHelper

org.drools.core.spi.KnowledgeHelper
KnowledgeHelper implementation types are injected into consequenses instrumented at compile time and instances passed at runtime. It provides convenience methods for users to interact with the WorkingMemory.
Of particular interest is the update method as it allows an object to be modified without having to specify the facthandle, because they are not passed to the consequence at runtime. To achieve this the implementation will need to lookup the fact handle of the object form the WorkingMemory.
org.drools.spi.KnowledgeHelper
KnowledgeHelper implementation types are injected into consequenses instrumented at compile time and instances passed at runtime. It provides convenience methods for users to interact with the WorkingMemory.
Of particular interest is the modifyObject method as it allows an object to be modified without having to specify the facthandle, because they are not passed to the consequence at runtime. To achieve this the implementation will need to lookup the fact handle of the object form the WorkingMemory. @author bob mcwhirter @author mark proctor
org.mvel2.tests.core.res.KnowledgeHelper

Examples of org.drools.spi.KnowledgeHelper


        df.setOtherVarsPos( otherVarsPos );
        df.setOtherVarsLength( otherVarsLength );
        
        if ( knowledgeHelper instanceof KnowledgeHelper ) {
            KnowledgeHelper kh = ( KnowledgeHelper ) knowledgeHelper;
            kh.setIdentityMap( identityMap );
            df.setKnowledgeHelper( kh );
        }        
    }

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Examples of org.drools.spi.KnowledgeHelper

                        VariableResolverFactory factory) {
        Object object = ((WithNode) node).getNestedStatement().getValue( null,
                                                                         factory );


        DroolsMVELKnowledgeHelper resolver = (DroolsMVELKnowledgeHelper) factory.getVariableResolver( "drools" );
        KnowledgeHelper helper = (KnowledgeHelper) resolver.getValue();
        helper.modifyRetract( object );
        return 0;
    }

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Examples of org.drools.spi.KnowledgeHelper


    public int doAfter(Object value,
                       ASTNode node,
                       VariableResolverFactory factory) {
        DroolsMVELKnowledgeHelper resolver = (DroolsMVELKnowledgeHelper) factory.getVariableResolver( "drools" );
        KnowledgeHelper helper = (KnowledgeHelper) resolver.getValue();
        helper.modifyInsert( value );
        return 0;
    }

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Examples of org.drools.spi.KnowledgeHelper

    }
    
    private void triggerTimer(TimerInstance timerInstance) {
      for (Map.Entry<Timer, DroolsAction> entry: getEventBasedNode().getTimers().entrySet()) {
        if (entry.getKey().getId() == timerInstance.getTimerId()) {
          KnowledgeHelper knowledgeHelper = createKnowledgeHelper();
          executeAction(entry.getValue(), knowledgeHelper);
          return;
        }
      }
    }

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Examples of org.drools.spi.KnowledgeHelper

            throw new IllegalArgumentException(
                "An ActionNode only accepts default incoming connections!");
        }
    Action action = (Action) getActionNode().getAction().getMetaData("Action");
    try {
        KnowledgeHelper knowledgeHelper = createKnowledgeHelper();
        ProcessContext context = new ProcessContext();
        context.setNodeInstance(this);
          action.execute(knowledgeHelper, ((ProcessInstance) getProcessInstance()).getWorkingMemory(), context);        
    } catch (Exception e) {
        throw new RuntimeException("unable to execute Action", e);

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Examples of org.drools.spi.KnowledgeHelper

  public void handleException(ExceptionHandler handler, String exception, Object params) {
    
    if (handler instanceof ActionExceptionHandler) {
      Action action = (Action) ((ActionExceptionHandler) handler).getAction().getMetaData("Action");
      try {
          KnowledgeHelper knowledgeHelper = createKnowledgeHelper();
          ProcessContext context = new ProcessContext();
          ProcessInstance processInstance = getProcessInstance();
          ContextInstanceContainer contextInstanceContainer = getContextInstanceContainer();
          if (contextInstanceContainer instanceof NodeInstance) {
            context.setNodeInstance((NodeInstance) contextInstanceContainer);

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Examples of org.drools.spi.KnowledgeHelper

  }
  
  protected void triggerEvent(String type) {
    List<DroolsAction> actions = getExtendedNode().getActions(type);
    if (actions != null) {
      KnowledgeHelper knowledgeHelper = createKnowledgeHelper();
      for (DroolsAction droolsAction: actions) {
        executeAction(droolsAction, knowledgeHelper);
      }
    }
  }

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Examples of org.drools.spi.KnowledgeHelper

      }
    }
  }
  
  protected KnowledgeHelper createKnowledgeHelper() {
    KnowledgeHelper knowledgeHelper = null;
    WorkingMemory workingMemory = ((ProcessInstance) getProcessInstance()).getWorkingMemory();
    if (((InternalRuleBase) workingMemory.getRuleBase()).getConfiguration().isSequential()) {
      knowledgeHelper = new SequentialKnowledgeHelper(workingMemory);
        } else {
          knowledgeHelper = new DefaultKnowledgeHelper(workingMemory);

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Examples of org.drools.spi.KnowledgeHelper


        df.setOtherVarsPos( otherVarsPos );
        df.setOtherVarsLength( otherVarsLength );
        
        if ( knowledgeHelper instanceof KnowledgeHelper ) {
            KnowledgeHelper kh = ( KnowledgeHelper ) knowledgeHelper;
            kh.setIdentityMap( identityMap );
            df.setKnowledgeHelper( kh );
        }        
    }

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Examples of org.drools.spi.KnowledgeHelper

        
        if ( factory == null ) {
            throw new RuntimeException( "Unable to find DroolsMVELIndexedFactory" );
        }


        KnowledgeHelper knowledgeHelper = ((DroolsVarFactory)factory).getKnowledgeHelper();


        if (modificationMask < 0) {
            calculateModificationMask(knowledgeHelper, (WithNode)node);
        }


        knowledgeHelper.update(value, modificationMask, value.getClass());
        return 0;
    }

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