feat: Add Gemma4PromptStrategy and Qwen35PromptStrategy implementations with prompt handling logic

Co-authored-by: Copilot <copilot@github.com>

src/main/java/de/extio/lmlib/prompt/Gemma4PromptStrategy.java

@@ -0,0 +1,121 @@
+package de.extio.lmlib.prompt;
+
+public class Gemma4PromptStrategy implements PromptStrategy {
+	
+	private static final String TURN_END = "<turn|>";
+	private static final String THOUGHT_START = "<|channel>thought\n";
+	private static final String THOUGHT_END = "\n<channel|>";
+	private static final String SYSTEM_START = "<|turn>system\n";
+	private static final String USER_START = "<|turn>user\n";
+	private static final String MODEL_START = "<|turn>model\n";
+	
+	@Override
+	public String getPromptName() {
+		return "gemma4";
+	}
+	
+	@Override
+	public StringBuilder start(final String system, final String user) {
+		final StringBuilder prompt = new StringBuilder();
+		if (system != null && !system.isEmpty()) {
+			prompt.append(SYSTEM_START);
+			prompt.append(system);
+			prompt.append(TURN_END).append("\n");
+		}
+		if (user != null && !user.isEmpty()) {
+			prompt.append(USER_START);
+			prompt.append(user);
+			prompt.append(TURN_END).append("\n");
+		}
+		prompt.append(MODEL_START);
+		return prompt;
+	}
+	
+	@Override
+	public void next(final StringBuilder prompt, final String assistant, final String user) {
+		final String assistantContent = assistant == null ? "" : assistant;
+		if (assistantContent.startsWith(MODEL_START) && this.endsWith(prompt, MODEL_START)) {
+			prompt.setLength(prompt.length() - MODEL_START.length());
+		}
+		prompt.append(assistantContent);
+		if (!assistantContent.endsWith(TURN_END)) {
+			if (!assistantContent.endsWith("\n")) {
+				prompt.append("\n");
+			}
+			prompt.append(TURN_END).append("\n");
+		}
+		else if (!assistantContent.endsWith(TURN_END + "\n")) {
+			prompt.append("\n");
+		}
+		if (user != null && !user.isEmpty()) {
+			prompt.append(USER_START);
+			prompt.append(user);
+			prompt.append(TURN_END).append("\n");
+		}
+		prompt.append(MODEL_START);
+	}
+	
+	@Override
+	public String removeEOT(final String prompt) {
+		if (prompt == null) {
+			return null;
+		}
+		return prompt.strip().replace(TURN_END, "");
+	}
+	
+	@Override
+	public String getResponse(final String prompt) {
+		final String assistantBlock = this.assistantBlock(prompt);
+		if (assistantBlock == null) {
+			return null;
+		}
+		final int thoughtEnd = assistantBlock.indexOf(THOUGHT_END);
+		if (thoughtEnd != -1) {
+			return assistantBlock.substring(thoughtEnd + THOUGHT_END.length()).strip();
+		}
+		return assistantBlock.strip();
+	}
+	
+	@Override
+	public String getReasoning(final String prompt) {
+		final String assistantBlock = this.assistantBlock(prompt);
+		if (assistantBlock == null) {
+			return null;
+		}
+		final int thoughtStart = assistantBlock.indexOf(THOUGHT_START);
+		final int thoughtEnd = assistantBlock.indexOf(THOUGHT_END);
+		if (thoughtStart != -1 && thoughtEnd > thoughtStart) {
+			return assistantBlock.substring(thoughtStart + THOUGHT_START.length(), thoughtEnd).strip();
+		}
+		return null;
+	}
+	
+	private String assistantBlock(final String prompt) {
+		if (prompt == null) {
+			return null;
+		}
+		String assistantBlock = prompt;
+		final int lastAssistantStart = prompt.lastIndexOf(MODEL_START);
+		if (lastAssistantStart != -1) {
+			assistantBlock = prompt.substring(lastAssistantStart + MODEL_START.length());
+		}
+		final int turnEnd = assistantBlock.indexOf(TURN_END);
+		if (turnEnd != -1) {
+			assistantBlock = assistantBlock.substring(0, turnEnd);
+		}
+		return assistantBlock;
+	}
+	
+	private boolean endsWith(final StringBuilder value, final String suffix) {
+		if (value.length() < suffix.length()) {
+			return false;
+		}
+		for (int i = 0; i < suffix.length(); i++) {
+			if (value.charAt(value.length() - suffix.length() + i) != suffix.charAt(i)) {
+				return false;
+			}
+		}
+		return true;
+	}
+	
+}

src/main/java/de/extio/lmlib/prompt/GemmaPromptStrategy.java

@@ -30,7 +30,7 @@ public class GemmaPromptStrategy implements PromptStrategy {
 	
 	@Override
 	public String getPromptName() {
-		return "gemma";
+		return "gemma2,3";
 	}
 	
 }

src/main/java/de/extio/lmlib/prompt/PromptAutoConfiguration.java

@@ -35,6 +35,12 @@ public class PromptAutoConfiguration {
 		return new GemmaPromptStrategy();
 	}
 	
+	@Bean
+	@ConditionalOnMissingBean
+	Gemma4PromptStrategy gemma4PromptStrategy() {
+		return new Gemma4PromptStrategy();
+	}
+	
 	@Bean
 	@ConditionalOnMissingBean
 	GptOssPromptStrategy gptOssPromptStrategy() {
@@ -89,6 +95,12 @@ public class PromptAutoConfiguration {
 		return new Qwen3PromptStrategy();
 	}
 	
+	@Bean
+	@ConditionalOnMissingBean
+	Qwen35PromptStrategy qwen35PromptStrategy() {
+		return new Qwen35PromptStrategy();
+	}
+	
 	@Bean
 	@ConditionalOnMissingBean
 	VicunaPromptStrategy vicunaPromptStrategy() {

src/main/java/de/extio/lmlib/prompt/Qwen35PromptStrategy.java

@@ -0,0 +1,130 @@
+package de.extio.lmlib.prompt;
+
+public class Qwen35PromptStrategy implements PromptStrategy {
+
+	private static final String IM_END = "<|im_end|>";
+	private static final String THINK_START = "<think>";
+	private static final String THINK_END = "</think>";
+
+	private static final String SYSTEM_START = "<|im_start|>system\n";
+	private static final String USER_START = "<|im_start|>user\n";
+	private static final String ASSISTANT_START = "<|im_start|>assistant\n";
+	private static final String ASSISTANT_GENERATION_START = ASSISTANT_START + THINK_START + "\n";
+
+	@Override
+	public String getPromptName() {
+		return "qwen3.5";
+	}
+
+	@Override
+	public StringBuilder start(final String system, final String user) {
+		final StringBuilder prompt = new StringBuilder();
+		if (system != null && !system.isEmpty()) {
+			prompt.append(SYSTEM_START);
+			prompt.append(system);
+			prompt.append(IM_END).append("\n");
+		}
+		if (user != null && !user.isEmpty()) {
+			prompt.append(USER_START);
+			prompt.append(user);
+			prompt.append(IM_END).append("\n");
+		}
+		prompt.append(ASSISTANT_GENERATION_START);
+		return prompt;
+	}
+
+	@Override
+	public void next(final StringBuilder prompt, final String assistant, final String user) {
+		final String assistantContent = assistant == null ? "" : assistant;
+		if (this.endsWith(prompt, ASSISTANT_GENERATION_START)) {
+			prompt.setLength(prompt.length() - ASSISTANT_GENERATION_START.length());
+		}
+		prompt.append(ASSISTANT_START);
+		prompt.append(assistantContent);
+		if (!assistantContent.endsWith(IM_END)) {
+			if (!assistantContent.endsWith("\n")) {
+				prompt.append("\n");
+			}
+			prompt.append(IM_END).append("\n");
+		}
+		else if (!assistantContent.endsWith(IM_END + "\n")) {
+			prompt.append("\n");
+		}
+		if (user != null && !user.isEmpty()) {
+			prompt.append(USER_START);
+			prompt.append(user);
+			prompt.append(IM_END).append("\n");
+		}
+		prompt.append(ASSISTANT_GENERATION_START);
+	}
+
+	@Override
+	public String removeEOT(final String prompt) {
+		if (prompt == null) {
+			return null;
+		}
+		return prompt.strip().replace(IM_END, "");
+	}
+
+	@Override
+	public String getResponse(final String prompt) {
+		final String assistantBlock = this.assistantBlock(prompt);
+		if (assistantBlock == null) {
+			return null;
+		}
+		final int thinkEnd = assistantBlock.indexOf(THINK_END);
+		if (thinkEnd != -1) {
+			return assistantBlock.substring(thinkEnd + THINK_END.length()).strip();
+		}
+		if (assistantBlock.startsWith(THINK_START) || assistantBlock.startsWith("\n")) {
+			return "";
+		}
+		return assistantBlock.strip();
+	}
+
+	@Override
+	public String getReasoning(final String prompt) {
+		final String assistantBlock = this.assistantBlock(prompt);
+		if (assistantBlock == null) {
+			return null;
+		}
+		final int thinkStart = assistantBlock.indexOf(THINK_START);
+		final int thinkEnd = assistantBlock.indexOf(THINK_END);
+		if (thinkEnd == -1) {
+			return null;
+		}
+		if (thinkStart != -1 && thinkEnd > thinkStart) {
+			return assistantBlock.substring(thinkStart + THINK_START.length(), thinkEnd).strip();
+		}
+		return assistantBlock.substring(0, thinkEnd).strip();
+	}
+
+	private String assistantBlock(final String prompt) {
+		if (prompt == null) {
+			return null;
+		}
+		String assistantBlock = prompt;
+		final int lastAssistantStart = prompt.lastIndexOf(ASSISTANT_START);
+		if (lastAssistantStart != -1) {
+			assistantBlock = prompt.substring(lastAssistantStart + ASSISTANT_START.length());
+		}
+		final int end = assistantBlock.indexOf(IM_END);
+		if (end != -1) {
+			assistantBlock = assistantBlock.substring(0, end);
+		}
+		return assistantBlock;
+	}
+
+	private boolean endsWith(final StringBuilder value, final String suffix) {
+		if (value.length() < suffix.length()) {
+			return false;
+		}
+		for (int i = 0; i < suffix.length(); i++) {
+			if (value.charAt(value.length() - suffix.length() + i) != suffix.charAt(i)) {
+				return false;
+			}
+		}
+		return true;
+	}
+
+}