| 1 | package org.egothor.methodatlas.ai; | |
| 2 | ||
| 3 | /** | |
| 4 | * Utility methods for extracting JSON fragments from free-form text produced by | |
| 5 | * AI model responses. | |
| 6 | * | |
| 7 | * <p> | |
| 8 | * Some AI providers may return textual responses that contain additional | |
| 9 | * commentary or formatting around the actual JSON payload requested by the | |
| 10 | * application. This helper provides a minimal extraction mechanism that | |
| 11 | * isolates the first JSON object found within such responses so that it can be | |
| 12 | * deserialized safely. | |
| 13 | * </p> | |
| 14 | * | |
| 15 | * <p> | |
| 16 | * The current implementation performs a simple structural search for the first | |
| 17 | * opening brace (<code>{</code>) and the last closing brace (<code>}</code>), | |
| 18 | * and returns the substring spanning those positions. | |
| 19 | * </p> | |
| 20 | * | |
| 21 | * <p> | |
| 22 | * The method is intentionally tolerant of provider-specific output formats and | |
| 23 | * is primarily used as a defensive measure to recover valid JSON payloads from | |
| 24 | * otherwise well-formed responses. | |
| 25 | * </p> | |
| 26 | * | |
| 27 | * <p> | |
| 28 | * This class is a non-instantiable utility holder. | |
| 29 | * </p> | |
| 30 | * | |
| 31 | * @see AiSuggestionException | |
| 32 | * @see AiClassSuggestion | |
| 33 | */ | |
| 34 | public final class JsonText { | |
| 35 | /** | |
| 36 | * Prevents instantiation of this utility class. | |
| 37 | */ | |
| 38 | private JsonText() { | |
| 39 | } | |
| 40 | ||
| 41 | /** | |
| 42 | * Extracts the first JSON object found within a text response. | |
| 43 | * | |
| 44 | * <p> | |
| 45 | * The method scans the supplied text for the first occurrence of an opening | |
| 46 | * brace (<code>{</code>) and the last occurrence of a closing brace | |
| 47 | * (<code>}</code>). The substring between these positions (inclusive) is | |
| 48 | * returned as the extracted JSON object. | |
| 49 | * </p> | |
| 50 | * | |
| 51 | * <p> | |
| 52 | * This approach allows the application to recover structured data even when the | |
| 53 | * model returns additional natural-language content or formatting around the | |
| 54 | * JSON payload. | |
| 55 | * </p> | |
| 56 | * | |
| 57 | * @param text text returned by the AI model | |
| 58 | * @return extracted JSON object as text | |
| 59 | * | |
| 60 | * @throws AiSuggestionException if the input text is empty or if no valid JSON | |
| 61 | * object boundaries can be located | |
| 62 | */ | |
| 63 | public static String extractFirstJsonObject(String text) throws AiSuggestionException { | |
| 64 |
4
1. extractFirstJsonObject : removed conditional - replaced equality check with false → KILLED 2. extractFirstJsonObject : removed conditional - replaced equality check with true → KILLED 3. extractFirstJsonObject : removed conditional - replaced equality check with false → KILLED 4. extractFirstJsonObject : removed conditional - replaced equality check with true → KILLED |
if (text == null || text.isBlank()) { |
| 65 | throw new AiSuggestionException("Model returned an empty response"); | |
| 66 | } | |
| 67 | ||
| 68 | int start = text.indexOf('{'); | |
| 69 | int end = text.lastIndexOf('}'); | |
| 70 | ||
| 71 |
9
1. extractFirstJsonObject : changed conditional boundary → SURVIVED 2. extractFirstJsonObject : changed conditional boundary → SURVIVED 3. extractFirstJsonObject : removed conditional - replaced comparison check with true → SURVIVED 4. extractFirstJsonObject : removed conditional - replaced comparison check with true → SURVIVED 5. extractFirstJsonObject : removed conditional - replaced comparison check with false → KILLED 6. extractFirstJsonObject : removed conditional - replaced comparison check with false → KILLED 7. extractFirstJsonObject : changed conditional boundary → KILLED 8. extractFirstJsonObject : removed conditional - replaced comparison check with false → KILLED 9. extractFirstJsonObject : removed conditional - replaced comparison check with true → KILLED |
if (start < 0 || end < 0 || end < start) { |
| 72 | throw new AiSuggestionException("Model response does not contain a JSON object: " + text); | |
| 73 | } | |
| 74 | ||
| 75 |
2
1. extractFirstJsonObject : replaced return value with "" for org/egothor/methodatlas/ai/JsonText::extractFirstJsonObject → KILLED 2. extractFirstJsonObject : Replaced integer addition with subtraction → KILLED |
return text.substring(start, end + 1); |
| 76 | } | |
| 77 | } | |
Mutations | ||
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1.1 2.2 3.3 4.4 |
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| 71 |
1.1 2.2 3.3 4.4 5.5 6.6 7.7 8.8 9.9 |
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| 75 |
1.1 2.2 |