Java Code Examples for com.sun.codemodel.JBlock#add()

private JMethod addAddMethod(JDefinedClass builderClass, JFieldVar field, boolean inherit) {
    List<JClass> typeParams = ((JClass) getJavaType(field)).getTypeParameters();
    if (!typeParams.iterator().hasNext()) {
        return null;
    }
    JMethod method = builderClass.method(JMod.PUBLIC, builderClass, "add" + StringUtils.capitalize(field.name()));
    JBlock block = method.body();
    String fieldName = field.name();
    JVar param = method.param(JMod.FINAL, typeParams.iterator().next(), fieldName);
    if (inherit) {
        generateSuperCall(method);
    } else {
        JInvocation invocation = JExpr.refthis(fieldName).invoke("add").arg(param);
        block.add(invocation);
    }
    block._return(JExpr._this());
    return method;
}
 

/**
 * The code generator creates a method called __DRILL_INIT__ which takes the
 * place of the constructor when the code goes though the byte code merge.
 * For Plain-old Java, we call the method from a constructor created for
 * that purpose. (Generated code, fortunately, never includes a constructor,
 * so we can create one.) Since the init block throws an exception (which
 * should never occur), the generated constructor converts the checked
 * exception into an unchecked one so as to not require changes to the
 * various places that create instances of the generated classes.
 *
 * Example:<code><pre>
 * public StreamingAggregatorGen1() {
 *       try {
 *         __DRILL_INIT__();
 *     } catch (SchemaChangeException e) {
 *         throw new UnsupportedOperationException(e);
 *     }
 * }</pre></code>
 *
 * Note: in Java 8 we'd use the <tt>Parameter</tt> class defined in Java's
 * introspection package. But, Drill prefers Java 7 which only provides
 * parameter types.
 */

private void addCtor(Class<?>[] parameters) {
  JMethod ctor = clazz.constructor(JMod.PUBLIC);
  JBlock body = ctor.body();

  // If there are parameters, need to pass them to the super class.
  if (parameters.length > 0) {
    JInvocation superCall = JExpr.invoke("super");

    // This case only occurs for nested classes, and all nested classes
    // in Drill are inner classes. Don't pass along the (hidden)
    // this$0 field.

    for (int i = 1; i < parameters.length; i++) {
      Class<?> p = parameters[i];
      superCall.arg(ctor.param(model._ref(p), "arg" + i));
    }
    body.add(superCall);
  }
  JTryBlock tryBlock = body._try();
  tryBlock.body().invoke(SignatureHolder.DRILL_INIT_METHOD);
  JCatchBlock catchBlock = tryBlock._catch(model.ref(SchemaChangeException.class));
  catchBlock.body()._throw(JExpr._new(model.ref(UnsupportedOperationException.class)).arg(catchBlock.param("e")));
}
 

final void generateCopyToMethod(final boolean partial) {
	if (this.implement) {
		final JDefinedClass typeDefinition = this.typeOutline.isInterface() && ((DefinedInterfaceOutline)this.typeOutline).getSupportInterface() != null ? ((DefinedInterfaceOutline)this.typeOutline).getSupportInterface() : this.definedClass;
		final JMethod copyToMethod = typeDefinition.method(JMod.PUBLIC, this.pluginContext.voidType, this.settings.getCopyToMethodName());
		final JTypeVar typeVar = copyToMethod.generify(BuilderGenerator.PARENT_BUILDER_TYPE_PARAMETER_NAME);
		final JVar otherParam = copyToMethod.param(JMod.FINAL, this.builderClass.raw.narrow(typeVar), BuilderGenerator.OTHER_PARAM_NAME);
		final CopyGenerator cloneGenerator = this.pluginContext.createCopyGenerator(copyToMethod, partial);
		final JBlock body = copyToMethod.body();
		final JVar otherRef;
		if (this.typeOutline.getSuperClass() != null) {
			body.add(cloneGenerator.generatePartialArgs(this.pluginContext.invoke(JExpr._super(), copyToMethod.name()).arg(otherParam)));
		}
		otherRef = otherParam;
		generateFieldCopyExpressions(cloneGenerator, body, otherRef, JExpr._this());
		copyToMethod.javadoc().append(JavadocUtils.hardWrapTextForJavadoc(getMessage("javadoc.method.copyTo")));
		copyToMethod.javadoc().addParam(otherParam).append(JavadocUtils.hardWrapTextForJavadoc(getMessage("javadoc.method.copyTo.param.other")));
	}
}
 

/**
 * Creates an inner braced and indented block
 * @param type type of the created block
 * @return a newly created inner block
 */
private JBlock createInnerBlock(BlockType type) {
  final JBlock currBlock = getBlock(type);
  final JBlock innerBlock = new JBlock();
  currBlock.add(innerBlock);
  return innerBlock;
}
 

@Override
public Void visit(MethodReference methodReference, ReadContext input) {
    JBlock body = input.getBody();

    body.add(invocationBuilder.buildMethodCall(
            input.getContainer(),
            methodReference.getRoot(),
            methodReference.getMethod(),
            Collections.singletonList(input.getGetExpression().getExpression()),
            input.getWrapped()));
    return null;
}
 

@Override
public Void visit(FieldReference fieldReference, ReadContext input) {
    JBlock body = input.getBody();

    body.add(invocationBuilder.buildFieldSet(
            input.getContainer(),
            fieldReference.getField(),
            input.getWrapped().getType(),
            new TypedExpression(fieldReference.getOwner(), input.getWrapped().getExpression()),
            input.getGetExpression()
    ));
    return null;
}
 

static
private void createReportMethod(JDefinedClass clazz){
	JCodeModel codeModel = clazz.owner();

	JMethod method = clazz.method(JMod.PRIVATE, void.class, "report");

	JVar expressionParameter = method.param(String.class, "expression");

	JBlock body = method.body();

	if((clazz.name()).endsWith("Value")){
		JClass reportClazz = codeModel.ref(Report.class);
		JClass reportEntryClazz = codeModel.ref(Report.Entry.class);

		JVar reportVariable = body.decl(reportClazz, "report", JExpr.invoke("getReport"));
		JVar entryVariable = body.decl(reportEntryClazz, "entry", JExpr._new(reportEntryClazz).arg(expressionParameter).arg(JExpr.invoke("getValue")));

		body.add(reportVariable.invoke("add").arg(entryVariable));
	} else

	if((clazz.name()).endsWith("Vector")){
		body.add(JExpr.invoke("setExpression").arg(expressionParameter));
	} else

	{
		throw new RuntimeException();
	}
}
 

static
private void createConstructor(JDefinedClass clazz, ExecutableElement executableElement, boolean hasExpression){
	JCodeModel codeModel = clazz.owner();

	JMethod constructor = clazz.constructor(JMod.PUBLIC);

	List<? extends VariableElement> parameterElements = executableElement.getParameters();
	for(VariableElement parameterElement : parameterElements){
		constructor.param(toType(codeModel, parameterElement.asType()), String.valueOf(parameterElement.getSimpleName()));
	}

	JBlock body = constructor.body();

	body.add(createSuperInvocation(clazz, constructor));

	if((clazz.name()).endsWith("Value")){
		JClass reportClazz = codeModel.ref(Report.class);

		JVar reportParameter = constructor.param(reportClazz, "report");

		body.add(JExpr.invoke("setReport").arg(reportParameter));
	} // End if

	if(hasExpression){
		JVar expressionParameter = constructor.param(String.class, "expression");

		body._if(expressionParameter.ne(JExpr._null()))._then().add(JExpr.invoke("report").arg(expressionParameter));
	}
}
 

static
private void createReportingConstructor(JDefinedClass clazz, ExecutableElement executableElement, String operation, String initialOperation, JPrimitiveType type){
	JCodeModel codeModel = clazz.owner();

	JMethod constructor = clazz.constructor(JMod.PUBLIC);

	List<? extends VariableElement> parameterElements = executableElement.getParameters();
	for(VariableElement parameterElement : parameterElements){
		constructor.param(toType(codeModel, parameterElement.asType()), String.valueOf(parameterElement.getSimpleName()));
	}

	JBlock body = constructor.body();

	body.add(createSuperInvocation(clazz, constructor));

	if((clazz.name()).endsWith("Value")){
		JClass reportClazz = codeModel.ref(Report.class);

		JVar reportParameter = constructor.param(reportClazz, "report");

		body.add(JExpr.invoke("setReport").arg(reportParameter));
	} // End if

	if(initialOperation != null){
		throw new RuntimeException();
	}

	body.add(JExpr.invoke("report").arg(createReportInvocation(clazz, operation, constructor.params(), type)));
}
 

private JBlock generateInitWorkspaceBlockHA(ClassGenerator<?> g, BlockType bt, String body, JVar[] workspaceJVars, JExpression wsIndexVariable){
  JBlock initBlock = new JBlock(true, true);
  if(!Strings.isNullOrEmpty(body) && !body.trim().isEmpty()){
    JBlock sub = new JBlock(true, true);
    addProtectedBlockHA(g, sub, body, null, workspaceJVars, wsIndexVariable);
    initBlock.directStatement(String.format("/** start %s for function %s **/ ", bt.name(), registeredNames[0]));
    initBlock.add(sub);
    initBlock.directStatement(String.format("/** end %s for function %s **/ ", bt.name(), registeredNames[0]));
  }
  return initBlock;
}
 

/**
 * Creates an inner braced and indented block
 * @param type type of the created block
 * @return a newly created inner block
 */
private JBlock createInnerBlock(BlockType type) {
  final JBlock currBlock = getBlock(type);
  final JBlock innerBlock = new JBlock();
  currBlock.add(innerBlock);
  return innerBlock;
}
 

private JBlock generateInitWorkspaceBlockHA(ClassGenerator<?> g, BlockType bt, String body, JVar[] workspaceJVars, JExpression wsIndexVariable){
  JBlock initBlock = new JBlock(true, true);
  if(!Strings.isNullOrEmpty(body) && !body.trim().isEmpty()){
    JBlock sub = new JBlock(true, true);
    addProtectedBlockHA(g, sub, body, null, workspaceJVars, wsIndexVariable);
    initBlock.directStatement(String.format("/** start %s for function %s **/ ", bt.name(), getRegisteredNames()[0]));
    initBlock.add(sub);
    initBlock.directStatement(String.format("/** end %s for function %s **/ ", bt.name(), getRegisteredNames()[0]));
  }
  return initBlock;
}
 

private HoldingContainer visitValueVectorWriteExpression(ValueVectorWriteExpression e, ClassGenerator<?> generator) {

      final LogicalExpression child = e.getChild();
      final HoldingContainer inputContainer = child.accept(this, generator);

      JBlock block = generator.getEvalBlock();
      JExpression outIndex = generator.getMappingSet().getValueWriteIndex();
      JVar vv = generator.declareVectorValueSetupAndMember(generator.getMappingSet().getOutgoing(), e.getFieldId());

      // Only when the input is a reader, use writer interface to copy value.
      // Otherwise, input is a holder and we use vv mutator to set value.
      if (inputContainer.isReader()) {
        JType writerImpl = generator.getModel()._ref(
            TypeHelper.getWriterImpl(inputContainer.getMinorType(), inputContainer.getMajorType().getMode()));
        JType writerIFace = generator.getModel()._ref(
            TypeHelper.getWriterInterface(inputContainer.getMinorType(), inputContainer.getMajorType().getMode()));
        JVar writer = generator.declareClassField("writer", writerIFace);
        generator.getSetupBlock().assign(writer, JExpr._new(writerImpl).arg(vv).arg(JExpr._null()));
        generator.getEvalBlock().add(writer.invoke("setPosition").arg(outIndex));
        String copyMethod = inputContainer.isSingularRepeated() ? "copyAsValueSingle" : "copyAsValue";
        generator.getEvalBlock().add(inputContainer.getHolder().invoke(copyMethod).arg(writer));
        if (e.isSafe()) {
          HoldingContainer outputContainer = generator.declare(Types.REQUIRED_BIT);
          generator.getEvalBlock().assign(outputContainer.getValue(), JExpr.lit(1));
          return outputContainer;
        }
      } else {

        final JInvocation setMeth = GetSetVectorHelper.write(e.getChild().getMajorType(), vv, inputContainer, outIndex, e.isSafe() ? "setSafe" : "set");
          if (inputContainer.isOptional()) {
            JConditional jc = block._if(inputContainer.getIsSet().eq(JExpr.lit(0)).not());
            block = jc._then();
          }
          block.add(setMeth);

      }

      return null;
    }
 

private HoldingContainer generateEval(ClassGenerator<?> g, HoldingContainer[] inputVariables, JVar[] workspaceJVars) {

    HoldingContainer out = g.declare(returnType);

    JCodeModel m = g.getModel();
    JBlock sub = new JBlock(true, true);

    // initialize DeferredObject's. For an optional type, assign the value holder only if it is not null
    for(int i=0; i<argTypes.length; i++) {
      sub.assign(workspaceJVars[3].component(JExpr.lit(i)), workspaceJVars[2].component(JExpr.lit(i)));
      JBlock conditionalBlock = new JBlock(false, false);
      JConditional jc = conditionalBlock._if(inputVariables[i].getIsSet().ne(JExpr.lit(0)));
      jc._then().assign(JExpr.ref(workspaceJVars[3].component(JExpr.lit(i)), "valueHolder"), inputVariables[i].getHolder());
      jc._else().assign(JExpr.ref(workspaceJVars[3].component(JExpr.lit(i)), "valueHolder"), JExpr._null());
      sub.add(conditionalBlock);
    }

    // declare generic object for storing return value from GenericUDF.evaluate
    JVar retVal = sub.decl(m._ref(Object.class), "ret");

    // create try..catch block to call the GenericUDF instance with given input
    JTryBlock udfEvalTry = sub._try();
    udfEvalTry.body().assign(retVal,
      workspaceJVars[1].invoke("evaluate").arg(workspaceJVars[3]));

    JCatchBlock udfEvalCatch = udfEvalTry._catch(m.directClass(Exception.class.getCanonicalName()));
    JVar exVar = udfEvalCatch.param("ex");
    udfEvalCatch.body()
      ._throw(JExpr._new(m.directClass(RuntimeException.class.getCanonicalName()))
        .arg(JExpr.lit(String.format("GenericUDF.evaluate method failed"))).arg(exVar));

    // get the ValueHolder from retVal and return ObjectInspector
    sub.add(ObjectInspectorHelper.getObject(m, returnOI, workspaceJVars[0], workspaceJVars[4], retVal));
    sub.assign(out.getHolder(), workspaceJVars[4]);

    // now add it to the doEval block in Generated class
    JBlock setup = g.getBlock(ClassGenerator.BlockType.EVAL);
    setup.directStatement(String.format("/** start %s for function %s **/ ",
      ClassGenerator.BlockType.EVAL.name(), genericUdfClazz.getName() + (!isGenericUDF ? "("+udfName+")" : "")));
    setup.add(sub);
    setup.directStatement(String.format("/** end %s for function %s **/ ",
      ClassGenerator.BlockType.EVAL.name(), genericUdfClazz.getName() + (!isGenericUDF ? "("+udfName+")" : "")));

    return out;
  }
 

private void generateSetup(ClassGenerator<?> g, JVar[] workspaceJVars) {
  JCodeModel m = g.getModel();
  JBlock sub = new JBlock(true, true);

  // declare and instantiate argument ObjectInspector's
  JVar oiArray = sub.decl(
    m._ref(ObjectInspector[].class),
    "argOIs",
    JExpr.newArray(m._ref(ObjectInspector.class), argTypes.length));

  JClass oih = m.directClass(ObjectInspectorHelper.class.getCanonicalName());
  JClass mt = m.directClass(MinorType.class.getCanonicalName());
  JClass mode = m.directClass(DataMode.class.getCanonicalName());
  for(int i=0; i<argTypes.length; i++) {
    sub.assign(
      oiArray.component(JExpr.lit(i)),
      oih.staticInvoke("getObjectInspector")
        .arg(mode.staticInvoke("valueOf").arg(JExpr.lit("OPTIONAL")))
        .arg(mt.staticInvoke("valueOf").arg(JExpr.lit(argTypes[i].toMinorType().name())))
        .arg((((PrimitiveObjectInspector) returnOI).getPrimitiveCategory() ==
            PrimitiveObjectInspector.PrimitiveCategory.STRING) ? JExpr.lit(true) : JExpr.lit(false)));
  }

  // declare and instantiate DeferredObject array
  sub.assign(workspaceJVars[2], JExpr.newArray(m._ref(DeferredObject.class), argTypes.length));

  for(int i=0; i<argTypes.length; i++) {
    sub.assign(
      workspaceJVars[2].component(JExpr.lit(i)),
      JExpr._new(m.directClass(DeferredObject.class.getCanonicalName())));
  }

  // declare empty array for argument deferred objects
  sub.assign(workspaceJVars[3], JExpr.newArray(m._ref(DeferredObject.class), argTypes.length));

  // create new instance of the UDF class
  sub.assign(workspaceJVars[1], getUDFInstance(m));

  // create try..catch block to initialize the UDF instance with argument OIs
  JTryBlock udfInitTry = sub._try();
  udfInitTry.body().assign(
    workspaceJVars[0],
    workspaceJVars[1].invoke("initialize")
    .arg(oiArray));

  JCatchBlock udfInitCatch = udfInitTry._catch(m.directClass(Exception.class.getCanonicalName()));
  JVar exVar = udfInitCatch.param("ex");
  udfInitCatch.body()
    ._throw(JExpr._new(m.directClass(RuntimeException.class.getCanonicalName()))
      .arg(JExpr.lit(String.format("Failed to initialize GenericUDF"))).arg(exVar));

  sub.add(ObjectInspectorHelper.initReturnValueHolder(g, m, workspaceJVars[4], returnOI, returnType.toMinorType()));

  // now add it to the doSetup block in Generated class
  JBlock setup = g.getBlock(ClassGenerator.BlockType.SETUP);
  setup.directStatement(String.format("/** start %s for function %s **/ ",
    ClassGenerator.BlockType.SETUP.name(), genericUdfClazz.getName() + (!isGenericUDF ? "("+udfName+")" : "")));

  setup.add(sub);

  setup.directStatement(String.format("/** end %s for function %s **/ ",
    ClassGenerator.BlockType.SETUP.name(), genericUdfClazz.getName() + (!isGenericUDF ? "("+udfName+")" : "")));
}
 

static
private void createReportingMethod(JDefinedClass clazz, ExecutableElement executableElement, String operation, String initialOperation, JPrimitiveType type){
	JCodeModel codeModel = clazz.owner();

	String name = String.valueOf(executableElement.getSimpleName());

	JMethod method = clazz.method(JMod.PUBLIC, clazz, name);
	method.annotate(Override.class);

	List<JVar> params = new ArrayList<>();

	List<? extends VariableElement> parameterElements = executableElement.getParameters();
	for(VariableElement parameterElement : parameterElements){
		TypeMirror paramType = parameterElement.asType();
		Name paramName = parameterElement.getSimpleName();

		JVar param;

		if((TypeKind.ARRAY).equals(paramType.getKind())){
			ArrayType arrayType = (ArrayType)paramType;

			param = method.varParam(toType(codeModel, arrayType.getComponentType()), String.valueOf(paramName));
		} else

		{
			param = method.param(toType(codeModel, paramType), String.valueOf(paramName));
		}

		params.add(param);
	}

	String valueMethod;

	if((codeModel.DOUBLE).equals(type)){
		valueMethod = "doubleValue";
	} else

	if((codeModel.FLOAT).equals(type)){
		valueMethod = "floatValue";
	} else

	{
		throw new IllegalArgumentException();
	}

	boolean checkChange;

	switch(name){
		case "add":
		case "subtract":
		case "multiply":
		case "divide":
			checkChange = (clazz.name()).endsWith("Value");
			break;
		default:
			checkChange = false;
			break;
	}

	JBlock body = method.body();

	JVar oldValueVar = null;
	if(checkChange){
		oldValueVar = body.decl(type, "oldValue", JExpr.invoke(valueMethod));
	}

	JVar resultVariable = body.decl(clazz, "result", JExpr.cast(clazz, createSuperInvocation(clazz, method)));

	JVar newValueVar = null;
	if(checkChange){
		newValueVar = body.decl(type, "newValue", JExpr.invoke(valueMethod));
	}

	JBlock block = body;
	if(checkChange){
		block = body._if((oldValueVar).ne(newValueVar))._then();
	}

	if(initialOperation != null){
		JConditional ifStatement = block._if(JExpr.invoke("hasExpression"));

		JBlock trueBlock = ifStatement._then();

		trueBlock.add(JExpr.invoke("report").arg(createReportInvocation(clazz, operation, params, type)));

		JBlock falseBlock = ifStatement._else();

		falseBlock.add(JExpr.invoke("report").arg(createReportInvocation(clazz, initialOperation, params, type)));
	} else

	{
		block.add(JExpr.invoke("report").arg(createReportInvocation(clazz, operation, params, type)));
	}

	body._return(resultVariable);
}
 

private HoldingContainer visitValueVectorWriteExpression(ValueVectorWriteExpression e, ClassGenerator<?> generator) {

      final LogicalExpression child = e.getChild();
      final HoldingContainer inputContainer = child.accept(this, generator);

      JBlock block = generator.getEvalBlock();
      JExpression outIndex = generator.getMappingSet().getValueWriteIndex();
      JVar vv = generator.declareVectorValueSetupAndMember(generator.getMappingSet().getOutgoing(), e.getFieldId());

      // Only when the input is a reader, use writer interface to copy value.
      // Otherwise, input is a holder and we use vv mutator to set value.
      if (inputContainer.isReader()) {
        JType writerImpl = generator.getModel()._ref(
                TypeHelper.getWriterImpl(getArrowMinorType(inputContainer.getCompleteType().toMinorType())));
        JType writerIFace = generator.getModel()._ref(
            TypeHelper.getWriterInterface(getArrowMinorType(inputContainer.getCompleteType().toMinorType())));

        JVar writer = generator.declareClassField("writer", writerIFace);
        generator.getSetupBlock().assign(writer, JExpr._new(writerImpl).arg(vv));
        generator.getEvalBlock().add(writer.invoke("setPosition").arg(outIndex));

        if (child.getCompleteType().isUnion() || child.getCompleteType().isComplex()) {
          final JClass complexCopierClass = generator.getModel()
              .ref(org.apache.arrow.vector.complex.impl.ComplexCopier.class);
          final JExpression castedWriter = JExpr.cast(generator.getModel().ref(FieldWriter.class), writer);
          generator.getEvalBlock()
              .add(complexCopierClass.staticInvoke("copy")
                  .arg(inputContainer.getHolder())
                  .arg(castedWriter));
        } else {
          String copyMethod = inputContainer.isSingularRepeated() ? "copyAsValueSingle" : "copyAsValue";
          generator.getEvalBlock().add(inputContainer.getHolder().invoke(copyMethod).arg(writer));
        }

        if (e.isSafe()) {
          HoldingContainer outputContainer = generator.declare(CompleteType.BIT);
          generator.getEvalBlock().assign(outputContainer.getValue(), JExpr.lit(1));
          return outputContainer;
        }
      } else {

        final JInvocation setMeth = GetSetVectorHelper.write(e.getChild().getCompleteType().toMinorType(), vv, inputContainer, outIndex, e.isSafe() ? "setSafe" : "set");
        JConditional jc = block._if(inputContainer.getIsSet().eq(JExpr.lit(0)).not());
        block = jc._then();
        block.add(setMeth);

      }

      return null;
    }
 

static
private void createFormatMethod(JDefinedClass clazz, JPrimitiveType type){
	JCodeModel codeModel = clazz.owner();

	JClass numberClazz = codeModel.ref(Number.class);
	JClass stringBuilderClazz = codeModel.ref(StringBuilder.class);

	JMethod method = clazz.method(JMod.STATIC | JMod.PRIVATE, String.class, "format");

	JVar valuesParameter = method.varParam(numberClazz, "values");

	JBlock body = method.body();

	JVar sbVariable = body.decl(stringBuilderClazz, "sb", JExpr._new(stringBuilderClazz).arg(valuesParameter.ref("length").mul(JExpr.lit(32))));

	JForEach forStatement = body.forEach(numberClazz, "value", valuesParameter);

	JBlock forBody = forStatement.body();

	forBody.add(createReportInvocation(clazz, sbVariable, "${0}", Collections.singletonList(forStatement.var()), type));

	body._return(sbVariable.invoke("toString"));
}
 

public static void read(CompleteType ct, JExpression vector, JBlock eval, HoldingContainer out, JCodeModel model,
                        JExpression indexVariable) {

  MinorType type = ct.toMinorType();

    eval.assign(out.getIsSet(), vector.invoke("isSet").arg(indexVariable));
    eval = eval._if(out.getIsSet().eq(JExpr.lit(1)))._then();
    switch (type) {
    case BIGINT:
    case FLOAT4:
    case FLOAT8:
    case INT:
    case MONEY:
    case SMALLINT:
    case TINYINT:
    case UINT1:
    case UINT2:
    case UINT4:
    case UINT8:
    case INTERVALYEAR:
    case DATE:
    case TIME:
    case TIMESTAMP:
    case BIT:
      eval.assign(out.getValue(), vector.invoke("get").arg(indexVariable));
      return;
    case DECIMAL:
      eval.assign(out.getHolder().ref("scale"), JExpr.lit(ct.getType(Decimal.class).getScale()));
      eval.assign(out.getHolder().ref("precision"), JExpr.lit(ct.getType(Decimal.class).getPrecision()));
      eval.assign(out.getHolder().ref("start"), JExpr.lit(TypeHelper.getSize(getArrowMinorType(type))).mul(indexVariable));
      eval.assign(out.getHolder().ref("buffer"), vector.invoke("getDataBuffer"));
      return;
    case INTERVALDAY: {
      JVar start = eval.decl(model.INT, "start", JExpr.lit(TypeHelper.getSize(getArrowMinorType(type))).mul(indexVariable));
      eval.assign(out.getHolder().ref("days"), vector.invoke("getDataBuffer").invoke("getInt").arg(start));
      eval.assign(out.getHolder().ref("milliseconds"), vector.invoke("getDataBuffer").invoke("getInt").arg(start.plus(JExpr.lit(4))));
      return;
    }
    case VARBINARY:
    case VARCHAR:
       eval.assign(out.getHolder().ref("buffer"), vector.invoke("getDataBuffer"));
       JVar se = eval.decl(model.LONG, "startEnd", vector.invoke("getStartEnd").arg(indexVariable));
       eval.assign(out.getHolder().ref("start"), JExpr.cast(model._ref(int.class), se));
       eval.assign(out.getHolder().ref("end"), JExpr.cast(model._ref(int.class), se.shr(JExpr.lit(32))));
      return;

    }

  // fallback.
  eval.add(vector.invoke("get").arg(indexVariable).arg(out.getHolder()));
}