Enhance asset handling with type-specific retrieval and null safety improvements

src/main/java/be/seeseepuff/pcinv/meta/AssetDescriptor.java

@@ -26,6 +26,9 @@ public class AssetDescriptor {
     /// The type of property, e.g.: ram, asset, etc...
     private final String type;
 
+    /// The Java class of the type.
+    private final Class<?> assetClass;
+
     /// The displayable name of the property, e.g.: "Random Access Memory"
     private final String displayName;
 
@@ -53,6 +56,7 @@ public class AssetDescriptor {
         Objects.requireNonNull(assetInfo, "Asset class must be annotated with @AssetInfo");
         var builder = AssetDescriptor.builder()
                 .type(assetInfo.type())
+                .assetClass(assetType)
                 .displayName(assetInfo.displayName())
                 .pluralName(assetInfo.pluralName())
                 .visible(assetInfo.isVisible())

src/main/java/be/seeseepuff/pcinv/meta/AssetProperty.java

@@ -70,7 +70,11 @@ public class AssetProperty {
                 .setter((obj, value) -> {
                     try {
                         property.setAccessible(true);
-                        property.set(obj, Converters.convert(value, property.getType()));
+                        if (obj instanceof Asset asset) {
+                            property.set(asset.getAsset(property.getDeclaringClass()), Converters.convert(value, property.getType()));
+                        } else {
+                            property.set(obj, Converters.convert(value, property.getType()));
+                        }
                     } catch (IllegalAccessException e) {
                         throw new RuntimeException(e);
                     }
@@ -81,7 +85,12 @@ public class AssetProperty {
                             obj = asset.getAsset();
                         }
                         property.setAccessible(true);
-                        return property.get(obj);
+
+                        if (obj instanceof Asset asset) {
+                            return property.get(asset.getAsset(property.getDeclaringClass()));
+                        } else {
+                            return property.get(obj);
+                        }
                     } catch (IllegalAccessException e) {
                         throw new RuntimeException(e);
                     }

src/main/java/be/seeseepuff/pcinv/models/Asset.java

@@ -9,5 +9,24 @@ public interface Asset {
         return getAsset().getQr();
     }
 
+
+    /**
+     * Returns the asset as a specific type.
+     * @param assetType The type of asset to return, e.g., CpuAsset.class.
+     * @return The asset cast to the specified type.
+     * @param <T> The type of asset to return, must extend Asset.
+     * @throws IllegalArgumentException if the requested assetType is not compatible with this asset.
+     */
+    @SuppressWarnings("unchecked")
+	default <T> T getAsset(Class<T> assetType) {
+        if (assetType.equals(GenericAsset.class)) {
+            return (T) getAsset();
+        }
+        if (assetType.equals(this.getClass())) {
+			return (T) this;
+        }
+        throw new IllegalArgumentException("No asset of type " + assetType.getSimpleName() + " found in composite.");
+    }
+
     void setAsset(GenericAsset asset);
 }

src/main/java/be/seeseepuff/pcinv/models/Composite.java

@@ -30,13 +30,12 @@ public class Composite implements Asset {
         addAsset(asset);
     }
 
-    /**
-     * Returns the composite asset as a specific type.
-     * @param assetType The type of asset to return, e.g., CpuAsset.class.
-     * @return The asset cast to the specified type.
-     * @param <T> The type of asset to return, must extend Asset.
-     */
-    public <T extends Asset> T getAsset(Class<T> assetType) {
+    @Override
+    public <T> T getAsset(Class<T> assetType) {
+        if (assetType.equals(GenericAsset.class)) {
+			//noinspection unchecked
+			return (T) getAsset();
+        }
         if (assetType.equals(Composite.class)) {
             return assetType.cast(this);
         }

src/main/java/be/seeseepuff/pcinv/models/PowerSupplyAsset.java

@@ -28,7 +28,7 @@ public class PowerSupplyAsset implements Asset
 
 	@Description("The wattage rating of the power supply in watts.")
 	@Property("Wattage")
-	private int wattage;
+	private Integer wattage;
 
 	@Description("The efficiency rating of the power supply, e.g., 80 Plus Bronze, Silver, Gold, Platinum, Titanium.")
 	@Property("Efficiency Rating")
@@ -42,25 +42,25 @@ public class PowerSupplyAsset implements Asset
 
 	@Description("The number number of Molex connectors.")
 	@Property("4-pin Molex Connectors")
-	private int molexConnectors;
+	private Integer molexConnectors;
 
 	@Description("The number of 4-pin floppy connectors.")
 	@Property("4-pin Floppy Connectors")
-	private int floppyConnectors;
+	private Integer floppyConnectors;
 
 	@Description("The number of SATA power connectors.")
 	@Property("15-pin SATA Connectors")
-	private int sataConnectors;
+	private Integer sataConnectors;
 
 	@Description("The number of 6-pin PCIe connectors.")
 	@Property("6-pin PCIe Connectors")
-	private int pcie6Connectors;
+	private Integer pcie6Connectors;
 
 	@Description("The number of 8-pin PCIe connectors.")
 	@Property("8-pin PCIe Connectors")
-	private int pcie8Connectors;
+	private Integer pcie8Connectors;
 
 	@Description("The number of 4-pin ATX 12V connectors.")
 	@Property("4-pin ATX 12V Connectors")
-	private int atx12vConnectors;
+	private Integer atx12vConnectors;
 }