Remove use of ObjectArrays.concat() in ApplicableRegionSet.

src/main/java/com/sk89q/worldguard/protection/ApplicableRegionSet.java

@@ -19,7 +19,6 @@
 
 package com.sk89q.worldguard.protection;
 
-import com.google.common.collect.ObjectArrays;
 import com.sk89q.worldguard.LocalPlayer;
 import com.sk89q.worldguard.protection.association.RegionAssociable;
 import com.sk89q.worldguard.protection.flags.DefaultFlag;
@@ -121,7 +120,7 @@ public boolean canBuild(LocalPlayer player) {
      */
     public boolean testBuild(RegionAssociable subject, StateFlag... flags) {
         checkNotNull(subject);
-        return test(flagValueCalculator.queryState(subject, ObjectArrays.concat(flags, DefaultFlag.BUILD)));
+        return test(flagValueCalculator.queryState(subject, DefaultFlag.BUILD, flags));
     }
 
     /**

src/main/java/com/sk89q/worldguard/protection/FlagValueCalculator.java

@@ -205,6 +205,53 @@ public State queryState(@Nullable RegionAssociable subject, StateFlag... flags)
         return value;
     }
 
+    /**
+     * Get the effective value for a list of state flags. The rules of
+     * states is observed here; that is, {@code DENY} overrides {@code ALLOW},
+     * and {@code ALLOW} overrides {@code NONE}.
+     *
+     * <p>This method is the same as
+     * {@link #queryState(RegionAssociable, StateFlag...)}.</p>
+     *
+     * @param subject an optional subject, which would be used to determine the region group to apply
+     * @param flag a flag to check
+     * @return a state
+     */
+    @Nullable
+    public State queryState(@Nullable RegionAssociable subject, StateFlag flag) {
+        return queryValue(subject, flag);
+    }
+
+    /**
+     * Get the effective value for a list of state flags. The rules of
+     * states is observed here; that is, {@code DENY} overrides {@code ALLOW},
+     * and {@code ALLOW} overrides {@code NONE}.
+     *
+     * <p>This method is the same as
+     * {@link #queryState(RegionAssociable, StateFlag...)} except it allows
+     * another flag to be added at the beginning of the flag list without
+     * having to concatenate the vararg array with the first flag.</p>
+     *
+     * @param subject an optional subject, which would be used to determine the region group to apply
+     * @param flags a list of flags to check
+     * @return a state
+     */
+    @Nullable
+    public State queryState(@Nullable RegionAssociable subject, StateFlag firstFlag, StateFlag... flags) {
+        State value = queryValue(subject, firstFlag);
+
+        if (value != State.DENY) {
+            for (StateFlag flag : flags) {
+                value = StateFlag.combine(value, queryValue(subject, flag));
+                if (value == State.DENY) {
+                    break;
+                }
+            }
+        }
+
+        return value;
+    }
+
     /**
      * Get the effective value for a flag. If there are multiple values
      * (for example, if there are multiple regions with the same priority