ExprBlockHardness - new expression for block hardness of a material

src/main/java/ch/njol/skript/expressions/ExprBlockHardness.java

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+/**
+ *   This file is part of Skript.
+ *
+ *  Skript is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Skript is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Skript.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright Peter Güttinger, SkriptLang team and contributors
+ */
+package ch.njol.skript.expressions;
+
+import ch.njol.skript.Skript;
+import ch.njol.skript.aliases.ItemType;
+import ch.njol.skript.doc.Description;
+import ch.njol.skript.doc.Examples;
+import ch.njol.skript.doc.Name;
+import ch.njol.skript.doc.RequiredPlugins;
+import ch.njol.skript.doc.Since;
+import ch.njol.skript.expressions.base.SimplePropertyExpression;
+import org.bukkit.Material;
+import org.jetbrains.annotations.Nullable;
+
+@Name("Block Hardness")
+@Description("Obtains the block's hardness level (also known as \"strength\"). This number is used to calculate the time required to break each block.")
+@Examples({"set {_hard} to block hardness of target block",
+	"if block hardness of target block > 5:"})
+@RequiredPlugins("Minecraft 1.13+")
+@Since("INSERT VERSION")
+public class ExprBlockHardness extends SimplePropertyExpression<ItemType, Number> {
+
+	static {
+		if (Skript.methodExists(Material.class, "getHardness"))
+			register(ExprBlockHardness.class, Number.class, "[block] hardness", "itemtypes");
+	}
+
+	@Nullable
+	@Override
+	public Number convert(ItemType itemType) {
+		Material material = itemType.getMaterial();
+		if (material.isBlock())
+			return material.getHardness();
+		return null;
+	}
+
+	@Override
+	public Class<? extends Number> getReturnType() {
+		return Number.class;
+	}
+
+	@Override
+	protected String getPropertyName() {
+		return "block hardness";
+	}
+
+}