docs: Make sure the DSL documentation reflects clearly the code

Signed-off-by: Matheus André <matheusandr2@gmail.com>

Author: matheusandre1

experimental/fluent/func/src/main/java/io/serverlessworkflow/fluent/func/dsl/Step.java

@@ -156,12 +156,12 @@ public <T, R> SELF exportAs(Function<T, R> function, Class<T> taskResultClass) {
   /**
    * Shapes what the task exports for downstream consumers using a context-aware filter function.
    *
-   * <p>This variant provides access to both workflow and task context, allowing you to inspect
-   * metadata when shaping the export.
+   * <p>This variant provides access to the task result, workflow context, and task context,
+   * allowing you to inspect metadata when shaping the export.
    *
-   * @param <T> the workflow context type
+   * @param <T> the task result type
    * @param <R> the export type (what gets written in the context)
-   * @param function the filter function with workflow and task context
+   * @param function the filter function with task result, workflow context, and task context
    * @return this step for method chaining
    * @see io.serverlessworkflow.fluent.func.spi.FuncTaskTransformations#exportAs(FilterFunction)
    */
@@ -177,10 +177,10 @@ public <T, R> SELF exportAs(FilterFunction<T, R> function) {
    * Shapes what the task exports for downstream consumers using a context-aware filter function
    * with explicit input type.
    *
-   * @param <T> the workflow context type
+   * @param <T> the task result type
    * @param <R> the export type (what gets written in the context)
-   * @param function the filter function with workflow and task context
-   * @param taskResultClass the class of the workflow context type
+   * @param function the filter function with task result, workflow context, and task context
+   * @param taskResultClass the class of the task result type
    * @return this step for method chaining
    * @see io.serverlessworkflow.fluent.func.spi.FuncTaskTransformations#exportAs(FilterFunction,
    *     Class)
@@ -278,7 +278,7 @@ public SELF exportAs(String jqExpression) {
    *
    * <pre>{@code
    * agent("investmentAnalyst", analyst::analyse, InvestmentMemo.class)
-   *     .outputAs(memo -> Map.of("memo", memo))
+   *     .outputAs(taskOutput -> Map.of("memo", taskOutput))
    *     .when(condition);
    * }</pre>
    *
@@ -318,20 +318,21 @@ public <T, R> SELF outputAs(Function<T, R> function, Class<T> taskResultClass) {
    * Shapes what gets written back into the workflow data document using a context-aware filter
    * function.
    *
-   * <p>This variant provides access to both workflow and task context, allowing you to inspect
-   * metadata, task input, and raw output when shaping the committed output.
+   * <p>This variant provides access to the task result as the first lambda parameter, plus the
+   * workflow and task context for metadata, task input, and raw output when shaping the committed
+   * output.
    *
    * <p><strong>Example:</strong>
    *
    * <pre>{@code
    * get("fetchMarketData", "http://localhost:8081/market-data/{ticker}")
-   *     .outputAs((MarketDataSnapshot snapshot,
+   *     .outputAs((MarketDataSnapshot taskOutput,
    *                WorkflowContextData wf,
    *                TaskContextData task) -> {
    *         var input = task.input().asMap().orElseThrow();
    *         var rawBody = task.rawOutput().asText().orElseThrow();
    *         return new InvestmentPrompt(
-   *             snapshot.ticker(),
+   *             taskOutput.ticker(),
    *             input.get("objective").toString(),
    *             rawBody
    *         );

experimental/lambda/src/test/java/io/serverless/workflow/impl/executors/func/FuncDSLDataFlowTransformationHelpersTest.java

@@ -17,7 +17,6 @@
 
 import static io.serverlessworkflow.fluent.func.dsl.FuncDSL.function;
 import static io.serverlessworkflow.fluent.func.dsl.FuncDSL.input;
-import static io.serverlessworkflow.fluent.func.dsl.FuncDSL.output;
 
 import io.serverlessworkflow.api.types.Workflow;
 import io.serverlessworkflow.fluent.func.FuncWorkflowBuilder;
@@ -82,11 +81,13 @@ void test_input_with_outputAs() {
                         },
                         Long.class)
                     .outputAs(
-                        (object, workflowContext, taskContextData) -> {
-                          softly.assertThat(object).isEqualTo(15L);
+                        (Long taskOutput,
+                            WorkflowContextData workflowContext,
+                            TaskContextData taskContextData) -> {
+                          softly.assertThat(taskOutput).isEqualTo(15L);
                           Long input = input(workflowContext, Long.class);
                           softly.assertThat(input).isEqualTo(10L);
-                          return input + object;
+                          return input + taskOutput;
                         },
                         Long.class))
             .build();
@@ -119,10 +120,9 @@ void test_output_with_exportAs() {
                         },
                         Long.class)
                     .exportAs(
-                        (Long object,
+                        (Long taskOutput,
                             WorkflowContextData workflowContext,
                             TaskContextData taskContextData) -> {
-                          Long taskOutput = output(taskContextData, Long.class);
                           softly.assertThat(taskOutput).isEqualTo(15L);
                           return taskOutput * 2;
                         }))
@@ -178,10 +178,9 @@ void test_input_with_exportAs() {
                         },
                         Long.class)
                     .exportAs(
-                        (Long object,
+                        (Long taskOutput,
                             WorkflowContextData workflowContext,
                             TaskContextData taskContextData) -> {
-                          Long taskOutput = output(taskContextData, Long.class);
                           softly.assertThat(taskOutput).isEqualTo(15L);
                           Long input = input(workflowContext, Long.class);
                           softly.assertThat(input).isEqualTo(10L);

impl/core/src/main/java/io/serverlessworkflow/impl/WorkflowUtils.java

@@ -82,11 +82,16 @@ public static Optional<WorkflowFilter> buildWorkflowFilter(WorkflowApplication a
   }
 
   public static Optional<WorkflowFilter> buildWorkflowFilter(WorkflowApplication app, ExportAs as) {
-    return as != null
-        ? Optional.of(
-            buildFilterFromStrObject(
-                app.expressionFactory(), app.contextFactory(), as.getString(), as.getObject()))
-        : Optional.empty();
+    if (as == null) {
+      return Optional.empty();
+    }
+    WorkflowFilter filter =
+        buildFilterFromStrObject(
+            app.expressionFactory(), app.contextFactory(), as.getString(), as.getObject());
+    if (as.getString() == null && as.getObject() != null) {
+      return Optional.of((w, t, m) -> filter.apply(w, t, t.rawOutput()));
+    }
+    return Optional.of(filter);
   }
 
   public static WorkflowFilter buildWorkflowFilter(WorkflowApplication app, Object obj) {