How to use

getValue

method

in

org.drools.core.rule.Declaration

protected boolean checkProcessInstance(Activation activation) {
  final Map<?, ?> declarations = activation.getSubRule().getOuterDeclarations();
  for ( Iterator<?> it = declarations.values().iterator(); it.hasNext(); ) {
    Declaration declaration = (Declaration) it.next();
    if ("processInstance".equals(declaration.getIdentifier())
        || "org.kie.api.runtime.process.WorkflowProcessInstance".equals(declaration.getTypeName())) {
      Object value = declaration.getValue(
        ((StatefulKnowledgeSessionImpl) getProcessInstance().getKnowledgeRuntime()).getInternalWorkingMemory(),
        ((InternalFactHandle) activation.getTuple().get(declaration)).getObject());
      if (value instanceof ProcessInstance) {
        return ((ProcessInstance) value).getId() == getProcessInstance().getId();
      }
    }
  }
  return true;
}

@Test
public void testGetFieldValue() {
  final InternalReadAccessor extractor = store.getReader( Cheese.class,
                              "type" );
  final Pattern pattern = new Pattern( 5,
                     new ClassObjectType( Cheese.class ) );
  // Bind the extractor to a decleration 
  // Declarations know the pattern they derive their value from 
  final Declaration declaration = new Declaration( "typeOfCheese",
                           extractor,
                           pattern );
  // Create some facts
  final Cheese cheddar = new Cheese( "cheddar",
                    5 );
  // Check we can extract Declarations correctly
  assertEquals( "cheddar",
         declaration.getValue( null,
                    cheddar ) );
}

@Test
public void testDeclarationsObjectType() throws Exception {
  final ObjectType type = new ClassObjectType( Cheese.class );
  final Pattern col = new Pattern( 0,
                  type,
                  "foo" );
  final Declaration dec = col.getDeclaration();
  final InternalReadAccessor ext = dec.getExtractor();
  assertEquals( Cheese.class,
         ext.getExtractToClass() );
  final Cheese stilton = new Cheese( "stilton",
                    42 );
  assertEquals( stilton,
         dec.getValue( null, stilton ) );
}

declaration.getValue( null, brie ) );

@Test
public void testDeclarationsFactTemplate() throws Exception {
  InternalKnowledgePackage pkg = new KnowledgePackageImpl( "org.store" );
  final FieldTemplate cheeseName = new FieldTemplateImpl( "name",
                              0,
                              String.class );
  final FieldTemplate cheesePrice = new FieldTemplateImpl( "price",
                               1,
                               Integer.class );
  final FieldTemplate[] fields = new FieldTemplate[]{cheeseName, cheesePrice};
  final FactTemplate cheese = new FactTemplateImpl( pkg,
                           "Cheese",
                           fields );
  final ObjectType type = new FactTemplateObjectType( cheese );
  final Pattern col = new Pattern( 0,
                  type,
                  "foo" );
  final Declaration dec = col.getDeclaration();
  final InternalReadAccessor ext = dec.getExtractor();
  assertEquals( Fact.class,
         ext.getExtractToClass() );
  final Fact stilton = cheese.createFact( 10 );
  stilton.setFieldValue( "name",
              "stilton" );
  stilton.setFieldValue( "price",
              new Integer( 200 ) );
  assertEquals( stilton,
         dec.getValue( null, stilton ) );
}

protected boolean checkProcessInstance(Activation activation) {
  final Map<?, ?> declarations = activation.getSubRule().getOuterDeclarations();
  for ( Iterator<?> it = declarations.values().iterator(); it.hasNext(); ) {
    Declaration declaration = (Declaration) it.next();
    if ("processInstance".equals(declaration.getIdentifier())
        || "org.kie.api.runtime.process.WorkflowProcessInstance".equals(declaration.getTypeName())) {
      Object value = declaration.getValue(
        ((StatefulKnowledgeSessionImpl) getProcessInstance().getKnowledgeRuntime()).getInternalWorkingMemory(),
        ((InternalFactHandle) activation.getTuple().get(declaration)).getObject());
      if (value instanceof ProcessInstance) {
        return ((ProcessInstance) value).getId() == getProcessInstance().getId();
      }
    }
  }
  return true;
}