Replace utils’ Validator with Guava’s Predicate.

[Sone.git] / src / main / java / net / pterodactylus / sone / utils / IntegerRangePredicate.java

diff --git a/src/main/java/net/pterodactylus/sone/utils/IntegerRangePredicate.java b/src/main/java/net/pterodactylus/sone/utils/IntegerRangePredicate.java
new file mode 100644 (file)
index 0000000..db6a841
--- /dev/null
+++ b/src/main/java/net/pterodactylus/sone/utils/IntegerRangePredicate.java
@@ -0,0 +1,62 @@
+/*
+ * Sone - IntegerRangePredicate.java - Copyright © 2013 David Roden
+ *
+ * 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 net.pterodactylus.sone.utils;
+
+import com.google.common.base.Predicate;
+
+/**
+ * {@link Predicate} that verifies that an {@link Integer} value is not
+ * {@code null} and is between a lower and an upper bound. Both bounds are
+ * inclusive.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public class IntegerRangePredicate implements Predicate<Integer> {
+
+       /** The lower bound. */
+       private final int lowerBound;
+
+       /** The upper bound. */
+       private final int upperBound;
+
+       /**
+        * Creates a new integer range predicate.
+        *
+        * @param lowerBound
+        *            The lower bound
+        * @param upperBound
+        *            The upper bound
+        */
+       public IntegerRangePredicate(int lowerBound, int upperBound) {
+               this.lowerBound = lowerBound;
+               this.upperBound = upperBound;
+       }
+
+       //
+       // PREDICATE METHODS
+       //
+
+       /**
+        * {@inheritDoc}
+        */
+       @Override
+       public boolean apply(Integer value) {
+               return (value != null) && (value >= lowerBound) && (value <= upperBound);
+       }
+
+}