Recipe loading from json assets

.gitignore

@@ -80,3 +80,4 @@ gradlew.bat
 # Linux
 *~
 
+/.nb-gradle/

.nb-gradle-properties

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<gradle-project-properties>
+  <!--DO NOT EDIT THIS FILE! - Used by the Gradle plugin of NetBeans.-->
+  <gradle-home/>
+</gradle-project-properties>

src/main/java/gregtech/api/recipes/GT_RecipeConditions.java

@@ -0,0 +1,72 @@
+package gregtech.api.recipes;
+
+import cpw.mods.fml.common.Loader;
+import gregtech.GT_Mod;
+import gregtech.api.enums.Materials;
+import gregtech.api.util.GT_Log;
+import gregtech.common.GT_Proxy;
+import java.lang.reflect.Field;
+import java.util.HashMap;
+import java.util.Map;
+import net.minecraftforge.fluids.FluidRegistry;
+
+/**
+ *
+ * Maps the conditions that certain recipes might need to be enabled or disabled based on.
+ * Some of these are boolean fields in other classes.<br>
+ * Plus a few special cases:
+ * <ul><li>ModLoaded(<i>ModName</i>) - Checks if the named mod is loaded
+ * <li>ModsLoaded(<i>ModName</i>, <i>ModName</i>, ...) - Checks if all the mods in the comma separated list are loaded.
+ * <li>FluidExists(<i>FluidName</i>) - Checks if the named fluid has been registered.
+ * <li>MaterialParent(<i>MaterialName</i>) - Checks if the named material has a "parent mod" according to the field in the Materials enum.
+ * </ul>
+ */
+public class GT_RecipeConditions {
+    private final static Map<String, Field> sConditionMap = new HashMap<>(100);
+
+    private GT_RecipeConditions() {
+        // Utility class
+    }
+
+    public static boolean getConditionValue(String aConditionName) {
+        String tModLoadedPattern = "ModLoaded\\(([A-Za-z0-9_]+)\\)";
+        String tModsLoadedPattern = "ModsLoaded\\(([A-Za-z0-9_, ]+)\\)";
+        String tFluidExistsPattern = "FluidExists\\(([A-Za-z]+)\\)";
+        String tMaterialParentPattern = "MaterialParent\\(([A-Za-z0-9_]+)\\)";
+        if (aConditionName.matches(tModLoadedPattern)) {
+            return Loader.isModLoaded(aConditionName.replaceFirst(tModLoadedPattern, "$1"));
+        } else if (aConditionName.matches(tModsLoadedPattern)) {
+            String[] tModNames = aConditionName.replaceFirst(tModsLoadedPattern, "$1").split(", *");
+            for (String tModName : tModNames) {
+                if (!Loader.isModLoaded(tModName)) {
+                    return false;
+                }
+            }
+            return true;
+        } else if (aConditionName.matches(tFluidExistsPattern)) {
+            return FluidRegistry.isFluidRegistered(aConditionName.replaceFirst(tFluidExistsPattern, "$1"));
+        } else if (aConditionName.matches(tMaterialParentPattern)) {
+            Materials tMaterial = Materials.get(aConditionName.replaceFirst(tMaterialParentPattern, "$1"));
+            if (tMaterial != Materials._NULL) {
+                return tMaterial.mHasParentMod;
+            }
+        }
+        try {
+            return sConditionMap.get(aConditionName).getBoolean(GT_Mod.gregtechproxy);
+        } catch (IllegalArgumentException | IllegalAccessException e) {
+            // ignore exceptions
+        }
+        return false;
+    }
+
+    static {
+        try {
+            sConditionMap.put("DisableIC2Cables", GT_Proxy.class.getField("mDisableIC2Cables"));
+            sConditionMap.put("HardMachineCasings", GT_Proxy.class.getField("mHardMachineCasings"));
+            sConditionMap.put("DisableOldChemicalRecipes", GT_Proxy.class.getField("mDisableOldChemicalRecipes"));
+            sConditionMap.put("MoreComplicatedChemicalRecipes", GT_Proxy.class.getField("mMoreComplicatedChemicalRecipes"));
+        } catch (Throwable e) {
+            e.printStackTrace(GT_Log.err);
+        }
+    }
+}