Update to Minecraft 1.9

By: md_5 <git@md-5.net>

paper-server/src/main/java/org/bukkit/craftbukkit/attribute/CraftAttributeInstance.java

@@ -0,0 +1,70 @@
+package org.bukkit.craftbukkit.attribute;
+
+import com.google.common.base.Preconditions;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import org.bukkit.attribute.Attribute;
+import org.bukkit.attribute.AttributeInstance;
+import org.bukkit.attribute.AttributeModifier;
+
+public class CraftAttributeInstance implements AttributeInstance {
+
+    private final net.minecraft.server.AttributeInstance handle;
+    private final Attribute attribute;
+
+    public CraftAttributeInstance(net.minecraft.server.AttributeInstance handle, Attribute attribute) {
+        this.handle = handle;
+        this.attribute = attribute;
+    }
+
+    @Override
+    public Attribute getAttribute() {
+        return attribute;
+    }
+
+    @Override
+    public double getBaseValue() {
+        return handle.b();
+    }
+
+    @Override
+    public void setBaseValue(double d) {
+        handle.setValue(d);
+    }
+
+    @Override
+    public Collection<AttributeModifier> getModifiers() {
+        List<AttributeModifier> result = new ArrayList<AttributeModifier>();
+        for (net.minecraft.server.AttributeModifier nms : handle.c()) {
+            result.add(convert(nms));
+        }
+
+        return result;
+    }
+
+    @Override
+    public void addModifier(AttributeModifier modifier) {
+        Preconditions.checkArgument(modifier != null, "modifier");
+        handle.b(convert(modifier));
+    }
+
+    @Override
+    public void removeModifier(AttributeModifier modifier) {
+        Preconditions.checkArgument(modifier != null, "modifier");
+        handle.c(convert(modifier));
+    }
+
+    @Override
+    public double getValue() {
+        return handle.getValue();
+    }
+
+    private static net.minecraft.server.AttributeModifier convert(AttributeModifier bukkit) {
+        return new net.minecraft.server.AttributeModifier(bukkit.getUniqueId(), bukkit.getName(), bukkit.getAmount(), bukkit.getOperation().ordinal());
+    }
+
+    private static AttributeModifier convert(net.minecraft.server.AttributeModifier nms) {
+        return new AttributeModifier(nms.a(), nms.b(), nms.d(), AttributeModifier.Operation.values()[nms.c()]);
+    }
+}

paper-server/src/main/java/org/bukkit/craftbukkit/attribute/CraftAttributeMap.java

@@ -0,0 +1,37 @@
+package org.bukkit.craftbukkit.attribute;
+
+import com.google.common.base.Preconditions;
+import net.minecraft.server.AttributeMapBase;
+import org.bukkit.attribute.Attributable;
+import org.bukkit.attribute.Attribute;
+import org.bukkit.attribute.AttributeInstance;
+
+public class CraftAttributeMap implements Attributable {
+
+    private final AttributeMapBase handle;
+
+    public CraftAttributeMap(AttributeMapBase handle) {
+        this.handle = handle;
+    }
+
+    @Override
+    public AttributeInstance getAttribute(Attribute attribute) {
+        Preconditions.checkArgument(attribute != null, "attribute");
+        net.minecraft.server.AttributeInstance nms = handle.a(toMinecraft(attribute.name()));
+
+        return (nms == null) ? null : new CraftAttributeInstance(nms, attribute);
+    }
+
+    static String toMinecraft(String bukkit) {
+        int first = bukkit.indexOf('_');
+        int second = bukkit.indexOf('_', first + 1);
+
+        StringBuilder sb = new StringBuilder(bukkit.toLowerCase());
+
+        sb.setCharAt(first, '.');
+        sb.deleteCharAt(second);
+        sb.setCharAt(second, bukkit.charAt(second + 1));
+
+        return sb.toString();
+    }
+}