Added CombinedRegionFunction.

src/main/java/com/sk89q/worldedit/function/CombinedRegionFunction.java

@@ -0,0 +1,91 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program 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.
+ *
+ * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.function;
+
+import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.WorldEditException;
+
+import java.util.*;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Executes several region functions in order.
+ */
+public class CombinedRegionFunction implements RegionFunction {
+
+    private final List<RegionFunction> functions = new ArrayList<RegionFunction>();
+
+    /**
+     * Create a combined region function.
+     */
+    public CombinedRegionFunction() {
+    }
+
+    /**
+     * Create a combined region function.
+     *
+     * @param functions a list of functions to match
+     */
+    public CombinedRegionFunction(Collection<RegionFunction> functions) {
+        checkNotNull(functions);
+        this.functions.addAll(functions);
+    }
+
+    /**
+     * Create a combined region function.
+     *
+     * @param function an array of functions to match
+     */
+    public CombinedRegionFunction(RegionFunction... function) {
+        this(Arrays.asList(checkNotNull(function)));
+    }
+
+    /**
+     * Add the given functions to the list of functions to call.
+     *
+     * @param functions a list of functions
+     */
+    public void add(Collection<RegionFunction> functions) {
+        checkNotNull(functions);
+        this.functions.addAll(functions);
+    }
+
+    /**
+     * Add the given functions to the list of functions to call.
+     *
+     * @param function an array of functions
+     */
+    public void add(RegionFunction... function) {
+        add(Arrays.asList(checkNotNull(function)));
+    }
+
+    @Override
+    public boolean apply(Vector position) throws WorldEditException {
+        boolean ret = false;
+        for (RegionFunction function : functions) {
+            if (function.apply(position)) {
+                ret = true;
+            }
+        }
+        return ret;
+    }
+
+}