Add HalfValue dynamic value

Mage/src/main/java/mage/abilities/dynamicvalue/common/HalfValue.java

@@ -0,0 +1,80 @@
+/*
+ *  Copyright 2010 BetaSteward_at_googlemail.com. All rights reserved.
+ *
+ *  Redistribution and use in source and binary forms, with or without modification, are
+ *  permitted provided that the following conditions are met:
+ *
+ *     1. Redistributions of source code must retain the above copyright notice, this list of
+ *        conditions and the following disclaimer.
+ *
+ *     2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *        of conditions and the following disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ *  THIS SOFTWARE IS PROVIDED BY BetaSteward_at_googlemail.com ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ *  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BetaSteward_at_googlemail.com OR
+ *  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ *  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ *  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  The views and conclusions contained in the software and documentation are those of the
+ *  authors and should not be interpreted as representing official policies, either expressed
+ *  or implied, of BetaSteward_at_googlemail.com.
+ */
+package mage.abilities.dynamicvalue.common;
+
+import mage.abilities.Ability;
+import mage.abilities.dynamicvalue.DynamicValue;
+import mage.abilities.effects.Effect;
+import mage.game.Game;
+
+/**
+ *
+ * @author Quercitron
+ */
+public class HalfValue implements DynamicValue {
+
+    private final DynamicValue value;
+    private final boolean roundedUp;
+
+    public HalfValue(final DynamicValue value, final boolean roundedUp) {
+        this.value = value.copy();
+        this.roundedUp = roundedUp;
+    }
+
+    public HalfValue(final HalfValue halfValue) {
+        this.value = halfValue.value.copy();
+        this.roundedUp = halfValue.roundedUp;
+    }
+
+    @Override
+    public int calculate(Game game, Ability sourceAbility, Effect effect) {
+        return (value.calculate(game, sourceAbility, effect) + (roundedUp ? 1 : 0)) / 2;
+    }
+
+    @Override
+    public HalfValue copy() {
+        return new HalfValue(this);
+    }
+
+    @Override
+    public String getMessage() {
+        StringBuilder sb = new StringBuilder();
+        sb.append("half ").append(value.getMessage());
+        if (roundedUp) {
+            sb.append(", rounded up");
+        } else {
+            sb.append(", rounded down");
+        }
+        return sb.toString();
+    }
+
+    @Override
+    public String toString() {
+        return "half ";
+    }
+}