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Fix[cf]: unable to load CurseForge entries in the modpack menu and un…
…able to download modpacks
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115 changes: 115 additions & 0 deletions
115
app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/utils/GsonJsonUtils.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,115 @@ | ||
| package net.kdt.pojavlaunch.utils; | ||
|
|
||
| import com.google.gson.JsonArray; | ||
| import com.google.gson.JsonElement; | ||
| import com.google.gson.JsonObject; | ||
|
|
||
| public class GsonJsonUtils { | ||
| /** | ||
| * Safely converts a JsonElement into a JsonObject. | ||
| * @param element the input JsonElement | ||
| * @return the JsonObject if: | ||
| * the JsonElement is not null | ||
| * the JsonElement is not Json null | ||
| * the JsonElement is a JsonObjet | ||
| * null otherwise | ||
| */ | ||
| public static JsonObject getJsonObjectSafe(JsonElement element) { | ||
| if(element == null) return null; | ||
| if(element.isJsonNull() || !element.isJsonObject()) return null; | ||
| return element.getAsJsonObject(); | ||
| } | ||
|
|
||
| /** | ||
| * Safely gets a JsonElement from a JsonObject | ||
| * @param jsonObject the input JsonObject | ||
| * @param memberName the member name of the JsonElement | ||
| * @return the JsonElement if: | ||
| * the input JsonObject is not null | ||
| * the input JsonObject contains an element with the specified memberName | ||
| * the JsonElement is not Json null | ||
| * null otherwise | ||
| */ | ||
| public static JsonElement getElementSafe(JsonObject jsonObject, String memberName) { | ||
| if(jsonObject == null) return null; | ||
| if(!jsonObject.has(memberName)) return null; | ||
| JsonElement element = jsonObject.get(memberName); | ||
| if(element.isJsonNull()) return null; | ||
| return element; | ||
| } | ||
|
|
||
| /** | ||
| * Safely gets a JsonObject from a JsonObject | ||
| * @param jsonObject the input JsonObject | ||
| * @param memberName the member name of the output JsonObject | ||
| * @return the output JsonObject if: | ||
| * the input JsonObject is not null | ||
| * the input JsonObject contains an element with the specified memberName | ||
| * the output JsonObject is not Json null | ||
| * the output JsonObject is a JsonObjet | ||
| * null otherwise | ||
| */ | ||
| public static JsonObject getJsonObjectSafe(JsonObject jsonObject, String memberName) { | ||
| return getJsonObjectSafe(getElementSafe(jsonObject, memberName)); | ||
| } | ||
|
|
||
| /** | ||
| * Safely gets a JsonArray from a JsonObject | ||
| * @param jsonObject the input JsonObject | ||
| * @param memberName the member name of the JsonArray | ||
| * @return the JsonArray if: | ||
| * the input JsonObject is not null | ||
| * the input JsonObject contains an element with the specified memberName | ||
| * the JsonArray is not Json null | ||
| * the JsonArray is a JsonArray | ||
| * null otherwise | ||
| */ | ||
| public static JsonArray getJsonArraySafe(JsonObject jsonObject, String memberName) { | ||
| JsonElement jsonElement = getElementSafe(jsonObject, memberName); | ||
| if(jsonElement == null || !jsonElement.isJsonArray()) return null; | ||
| return jsonElement.getAsJsonArray(); | ||
| } | ||
|
|
||
| /** | ||
| * Safely gets an int from a JsonObject | ||
| * @param jsonObject the input JsonObject | ||
| * @param memberName the member name of the int | ||
| * @param onNullValue the value that will be returned if any of the checks fail | ||
| * @return the int if: | ||
| * the input JsonObject is not null | ||
| * the input JsonObject contains an element with the specified memberName | ||
| * the int is not Json null | ||
| * the int is an actual integer | ||
| * onNullValue otherwise | ||
| */ | ||
| public static int getIntSafe(JsonObject jsonObject, String memberName, int onNullValue) { | ||
| JsonElement jsonElement = getElementSafe(jsonObject, memberName); | ||
| if(jsonElement == null || !jsonElement.isJsonPrimitive()) return onNullValue; | ||
| try { | ||
| return jsonElement.getAsInt(); | ||
| }catch (ClassCastException e) { | ||
| return onNullValue; | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Safely gets a String from a JsonObject | ||
| * @param jsonObject the input JsonObject | ||
| * @param memberName the member name of the int | ||
| * @return the String if: | ||
| * the input JsonObject is not null | ||
| * the input JsonObject contains an element with the specified memberName | ||
| * the String is not a Json null | ||
| * the String is an actual String | ||
| * null otherwise | ||
| */ | ||
| public static String getStringSafe(JsonObject jsonObject, String memberName) { | ||
| JsonElement jsonElement = getElementSafe(jsonObject, memberName); | ||
| if(jsonElement == null || !jsonElement.isJsonPrimitive()) return null; | ||
| try { | ||
| return jsonElement.getAsString(); | ||
| }catch (ClassCastException e) { | ||
| return null; | ||
| } | ||
| } | ||
| } |