1 files changed, 40 insertions, 0 deletions
diff --git a/src/main/java/com/beust/jcommander/validators/PositiveInteger.java b/src/main/java/com/beust/jcommander/validators/PositiveInteger.java
new file mode 100644
index 0000000..7b5c1b7
--- /dev/null
+++ b/src/main/java/com/beust/jcommander/validators/PositiveInteger.java
@@ -0,0 +1,40 @@
+/**
+ * Copyright (C) 2011 the original author or authors.
+ * See the notice.md file distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.beust.jcommander.validators;
+
+import com.beust.jcommander.IParameterValidator;
+import com.beust.jcommander.ParameterException;
+
+/**
+ * A validator that makes sure the value of the parameter is a positive integer.
+ *
+ * @author Cedric Beust <cedric@beust.com>
+ */
+public class PositiveInteger implements IParameterValidator {
+
+  public void validate(String name, String value)
+      throws ParameterException {
+    int n = Integer.parseInt(value);
+    if (n < 0) {
+      throw new ParameterException("Parameter " + name
+          + " should be positive (found " + value +")");
+    }
+  }
+
+}