Java: Fix execution of Example05_InlineFunctionDefinition (#4452)

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- [ ] The code builds clean without any errors or warnings
- [ ] The PR follows the [SK Contribution
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java/samples/sample-code/src/main/java/com/microsoft/semantickernel/samples/syntaxexamples/Example06_TemplateLanguage.java

@@ -0,0 +1,68 @@
+package com.microsoft.semantickernel.samples.syntaxexamples;
+
+import com.azure.ai.openai.OpenAIAsyncClient;
+import com.microsoft.semantickernel.DefaultKernel;
+import com.microsoft.semantickernel.Kernel;
+import com.microsoft.semantickernel.aiservices.azureopenai.AzureOpenAITextGenerationService;
+import com.microsoft.semantickernel.exceptions.ConfigurationException;
+import com.microsoft.semantickernel.samples.SamplesConfig;
+import com.microsoft.semantickernel.textcompletion.TextGenerationService;
+
+public class Example06_TemplateLanguage {
+
+    public static void main(String[] args) throws ConfigurationException {
+
+        System.out.println("======== TemplateLanguage ========");
+
+        OpenAIAsyncClient client = SamplesConfig.getClient();
+
+        AzureOpenAITextGenerationService textGenerationService = AzureOpenAITextGenerationService.builder()
+            .withOpenAIAsyncClient(client)
+            .withModelId("text-davinci-003")
+            .build();
+
+        Kernel kernel = new DefaultKernel.Builder()
+            .withDefaultAIService(TextGenerationService.class, textGenerationService)
+            .build();
+/*
+        // Load native plugin into the kernel function collection, sharing its functions with prompt templates
+        // Functions loaded here are available as "time.*"
+        kernel.importPluginFromType("time");
+
+        // Prompt Function invoking time.Date and time.Time method functions
+        String functionDefinition = """
+            Today is: {{time.Date}}
+            Current time is: {{time.Time}}
+
+            Answer to the following questions using JSON syntax, including the data used.
+                Is it morning, afternoon, evening, or night (morning/afternoon/evening/night)?
+                Is it weekend time (weekend/not weekend)?
+                """;
+
+        // This allows to see the prompt before it's sent to OpenAI
+        System.out.println("--- Rendered Prompt");
+        var promptTemplateFactory = new KernelPromptTemplateFactory();
+        var promptTemplate = promptTemplateFactory.tryCreate(
+            new PromptTemplateConfig(functionDefinition));
+        var renderedPrompt = promptTemplate.renderAsync(kernel, null).block();
+        System.out.println(renderedPrompt);
+
+        // Run the prompt / prompt function
+        var kindOfDay = kernel
+            .createFunctionFromPrompt(
+                functionDefinition,
+                new PromptExecutionSettings.Builder()
+                    .withMaxTokens(100)
+                    .build(),
+                null,
+                null,
+                null,
+                null);
+
+        // Show the result
+        System.out.println("--- Prompt Function result");
+        var result = kernel.invokeAsync(kindOfDay, null);
+        System.out.println(result.GetValue < string > ());
+*/
+    }
+}

java/semantickernel-api/src/main/java/com/microsoft/semantickernel/DefaultKernel.java

@@ -2,12 +2,14 @@ package com.microsoft.semantickernel;
 
 import com.microsoft.semantickernel.chatcompletion.ChatCompletionService;
 import com.microsoft.semantickernel.orchestration.KernelFunction;
+import com.microsoft.semantickernel.orchestration.PromptExecutionSettings;
 import com.microsoft.semantickernel.orchestration.contextvariables.ContextVariable;
 import com.microsoft.semantickernel.orchestration.contextvariables.ContextVariableType;
 import com.microsoft.semantickernel.orchestration.contextvariables.ContextVariableTypes;
 import com.microsoft.semantickernel.orchestration.contextvariables.KernelArguments;
 import com.microsoft.semantickernel.plugin.KernelPlugin;
 import com.microsoft.semantickernel.semanticfunctions.PromptTemplate;
+import com.microsoft.semantickernel.semanticfunctions.PromptTemplateFactory;
 import com.microsoft.semantickernel.textcompletion.TextGenerationService;
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -58,6 +60,19 @@ public class DefaultKernel implements Kernel {
         return serviceProvider;
     }
 
+    @Override
+    public KernelPlugin importPluginFromType(@Nullable String pluginName) {
+        throw new Todo();
+    }
+
+    @Override
+    public KernelFunction createFunctionFromPrompt(String promptTemplate,
+        @Nullable PromptExecutionSettings executionSettings, @Nullable String functionName,
+        @Nullable String description, @Nullable String templateFormat,
+        @Nullable PromptTemplateFactory promptTemplateFactory) {
+        throw new Todo();
+    }
+
     static class DefaultServiceProvider implements ServiceProvider {
 
         private final Map<Class, AIService> services;

java/semantickernel-api/src/main/java/com/microsoft/semantickernel/Kernel.java

@@ -51,6 +51,16 @@ public interface Kernel extends Buildable {
 
     ServiceProvider getServiceSelector();
 
+    KernelPlugin importPluginFromType(@Nullable String pluginName);
+
+    KernelFunction createFunctionFromPrompt(
+        String promptTemplate,
+        @Nullable PromptExecutionSettings executionSettings,
+        @Nullable String functionName,
+        @Nullable String description,
+        @Nullable String templateFormat,
+        @Nullable PromptTemplateFactory promptTemplateFactory);
+
     interface Builder extends SemanticKernelBuilder<Kernel> {
 
         <T extends AIService> Builder withDefaultAIService(Class<T> clazz, T aiService);

java/semantickernel-api/src/main/java/com/microsoft/semantickernel/semanticfunctions/KernelFunctionFromPrompt.java

@@ -1,14 +1,5 @@
 package com.microsoft.semantickernel.semanticfunctions;
 
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
-import javax.annotation.Nullable;
-
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import com.azure.core.exception.HttpResponseException;
 import com.microsoft.semantickernel.AIService;
 import com.microsoft.semantickernel.Kernel;
@@ -23,7 +14,12 @@ import com.microsoft.semantickernel.orchestration.contextvariables.ContextVariab
 import com.microsoft.semantickernel.orchestration.contextvariables.KernelArguments;
 import com.microsoft.semantickernel.templateengine.handlebars.HandlebarsPromptTemplate;
 import com.microsoft.semantickernel.textcompletion.TextGenerationService;
-
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import javax.annotation.Nullable;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
 
@@ -66,13 +62,20 @@ public class KernelFunctionFromPrompt extends DefaultKernelFunction {
 
                 Flux<StreamingContent<T>> result;
 
+                PromptExecutionSettings executionSettings;
+                if (arguments != null) {
+                    executionSettings = arguments.getExecutionSettings();
+                } else {
+                    executionSettings = null;
+                }
+
                 if (client instanceof ChatCompletionService) {
 
                     prompt = "<messages>" + prompt + "</messages>";
                     result = ((ChatCompletionService) client)
                         .getStreamingChatMessageContentsAsync(
                             prompt,
-                            arguments.getExecutionSettings(),
+                            executionSettings,
                             kernel)
                         .flatMap(streamingChatMessageContent -> {
                             T value = variableType
@@ -81,13 +84,13 @@ public class KernelFunctionFromPrompt extends DefaultKernelFunction {
                                     streamingChatMessageContent.getContent());
                             return Flux.just(new StreamingContent<>(value));
                         });
-                        return result;
+                    return result;
 
                 } else if (client instanceof TextGenerationService) {
                     result = ((TextGenerationService) client)
                         .getStreamingTextContentsAsync(
                             prompt,
-                            arguments.getExecutionSettings(),
+                            executionSettings,
                             kernel)
                         .flatMap(streamingTextContent -> {
                             T value = variableType.getConverter().fromPromptString(

java/semantickernel-api/src/main/java/com/microsoft/semantickernel/semanticfunctions/KernelPromptTemplateFactory.java

@@ -0,0 +1,9 @@
+package com.microsoft.semantickernel.semanticfunctions;
+
+public class KernelPromptTemplateFactory implements PromptTemplateFactory{
+
+    @Override
+    public PromptTemplate tryCreate(PromptTemplateConfig templateConfig) {
+        return null;
+    }
+}