From 90a3792ccc7909fa9a54412f3f48dc02efe093e0 Mon Sep 17 00:00:00 2001
From: Patrick Gotthard <patrick@patrick-gotthard.de>
Date: Fri, 18 Apr 2014 19:28:04 +0200
Subject: [PATCH] Added method to parse Integers

---
 .../java/com/rometools/utils/Integers.java    | 22 ++++++++++++++++
 .../com/rometools/utils/IntegersTest.java     | 26 +++++++++++++++++++
 2 files changed, 48 insertions(+)
 create mode 100644 src/main/java/com/rometools/utils/Integers.java
 create mode 100644 src/test/java/com/rometools/utils/IntegersTest.java

diff --git a/src/main/java/com/rometools/utils/Integers.java b/src/main/java/com/rometools/utils/Integers.java
new file mode 100644
index 0000000..ec5ca85
--- /dev/null
+++ b/src/main/java/com/rometools/utils/Integers.java
@@ -0,0 +1,22 @@
+package com.rometools.utils;
+
+public final class Integers {
+
+    private Integers() {
+    }
+
+    /**
+     * Converts a String into an Integer.
+     * 
+     * @param s The String to convert, may be null
+     * @return The parsed Integer or null when parsing is not possible
+     */
+    public static Integer parse(final String s) {
+        try {
+            return Integer.parseInt(s);
+        } catch (final NumberFormatException e) {
+            return null;
+        }
+    }
+
+}
diff --git a/src/test/java/com/rometools/utils/IntegersTest.java b/src/test/java/com/rometools/utils/IntegersTest.java
new file mode 100644
index 0000000..8fc40db
--- /dev/null
+++ b/src/test/java/com/rometools/utils/IntegersTest.java
@@ -0,0 +1,26 @@
+package com.rometools.utils;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.nullValue;
+
+import org.junit.Test;
+
+public class IntegersTest {
+
+    @Test
+    public void testParse() {
+
+        final String nullString = null;
+        final String emptyString = null;
+        final String integerString = "1";
+        final String decimalString = "1.0";
+
+        assertThat(Integers.parse(nullString), is(nullValue()));
+        assertThat(Integers.parse(emptyString), is(nullValue()));
+        assertThat(Integers.parse(integerString), is(1));
+        assertThat(Integers.parse(decimalString), is(nullValue()));
+
+    }
+
+}