Creeper Explosion Radius Expression

src/main/java/ch/njol/skript/expressions/ExprCreeperExplosionRadius.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 2011-2017 Peter Güttinger and contributors
+ */
+package ch.njol.skript.expressions;
+
+import org.bukkit.entity.Creeper;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.event.Event;
+import org.eclipse.jdt.annotation.Nullable;
+
+import ch.njol.skript.Skript;
+import ch.njol.skript.classes.Changer.ChangeMode;
+import ch.njol.skript.doc.Description;
+import ch.njol.skript.doc.Examples;
+import ch.njol.skript.doc.Name;
+import ch.njol.skript.doc.Since;
+import ch.njol.skript.expressions.base.SimplePropertyExpression;
+import ch.njol.util.coll.CollectionUtils;
+
+@Name("Creeper Explosion Radius")
+@Description("The explosion radius that a creeper has.")
+@Examples("set target entity's explosion radius to 10")
+@Since("INSERT VERSION")
+public class ExprCreeperExplosionRadius extends SimplePropertyExpression<LivingEntity, Number> {
+
+	static {
+		if(Skript.methodExists(LivingEntity.class, "getExplosionRadius"))
+			register(ExprCreeperExplosionRadius.class, Number.class, "[creeper] explosion radius", "livingentities");
+	}
+
+	@Override
+	public Number convert(LivingEntity e) {
+		return e instanceof Creeper ? ((Creeper) e).getExplosionRadius() : 0;
+	}
+
+	@Override
+	@Nullable
+	public Class<?>[] acceptChange(final ChangeMode mode) {
+		if (mode == ChangeMode.REMOVE_ALL)
+			return null;
+		return CollectionUtils.array(Number.class);
+	}
+
+	@Override
+	public void change(final Event e, final @Nullable Object[] delta, final ChangeMode mode) {
+		int d = delta == null ? 0 : ((Number) delta[0]).intValue();
+		for (LivingEntity le : getExpr().getArray(e)) {
+			if (le instanceof Creeper) {
+				Creeper c = (Creeper) le;
+				switch (mode) {
+					case ADD:
+						int r1 = c.getExplosionRadius() + d;
+						if (r1 < 0) r1 = 0;
+						c.setExplosionRadius(r1);
+						break;
+					case SET:
+						c.setExplosionRadius(d);
+						break;
+					case DELETE:
+					case RESET:
+						c.setExplosionRadius(0);
+						break;
+					case REMOVE:
+						int r2 = c.getExplosionRadius() - d;
+						if (r2 < 0) r2 = 0;
+						c.setExplosionRadius(r2);
+						break;
+					case REMOVE_ALL:
+						assert false;		
+				}
+			}
+		}
+	}
+
+	@Override
+	protected String getPropertyName() {
+		return "creeper explosion radius";
+	}
+
+	@Override
+	public Class<Number> getReturnType() {
+		return Number.class;
+	}
+
+}