Fixed TrapDoor and added MaterialData for LONG_GRASS. Thanks sunkid!

By: EvilSeph <evilseph@unaligned.org>

paper-api/src/main/java/org/bukkit/GrassSpecies.java

@@ -0,0 +1,57 @@
+package org.bukkit;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Represents the different types of grass.
+ */
+public enum GrassSpecies {
+
+    /**
+     * Represents the dead looking grass.
+     */
+    DEAD((byte) 0x0),
+    /**
+     * Represents the normal grass species.
+     */
+    NORMAL((byte) 0x1),
+    /**
+     * Represents the fern-looking grass species.
+     */
+    FERN_LIKE((byte) 0x2);
+
+    private final byte data;
+    private final static Map<Byte, GrassSpecies> species = new HashMap<Byte, GrassSpecies>();
+
+    private GrassSpecies(final byte data) {
+        this.data = data;
+    }
+
+    /**
+     * Gets the associated data value representing this species
+     *
+     * @return A byte containing the data value of this grass species
+     */
+    public byte getData() {
+        return data;
+    }
+
+    /**
+     * Gets the GrassSpecies with the given data value
+     *
+     * @param data
+     *            Data value to fetch
+     * @return The {@link GrassSpecies} representing the given value, or null if
+     *         it doesn't exist
+     */
+    public static GrassSpecies getByData(final byte data) {
+        return species.get(data);
+    }
+
+    static {
+        for (GrassSpecies s : GrassSpecies.values()) {
+            species.put(s.getData(), s);
+        }
+    }
+}