1 files changed, 138 insertions, 0 deletions
diff --git a/tags/2.3/src/main/java/org/mockftpserver/core/util/Assert.java b/tags/2.3/src/main/java/org/mockftpserver/core/util/Assert.java
new file mode 100644
index 0000000..de4a8cd
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+++ b/tags/2.3/src/main/java/org/mockftpserver/core/util/Assert.java
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+/*
+ * Copyright 2007 the original author or authors.
+ * 
+ * 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 org.mockftpserver.core.util;
+
+import java.util.Collection;
+import java.util.Map;
+
+/**
+ * Provides static helper methods to make runtime assertions. Throws an
+ * <code>AssertFailedException</code> when the assertion fails. All methods are static.
+ * 
+ * @version $Revision$ - $Date$
+ * 
+ * @author Chris Mair
+ */
+public final class Assert {
+    
+    /**
+     * Verify that arg is null. Throw an AssertFailedException if it is not null.
+     * @param arg - the method parameter value
+     * @param argName - the name of the parameter; used in the exception message
+     * @throws AssertFailedException - if arg is not null
+     */
+    public static void isNull(Object arg, String argName) {
+        if (arg != null) {
+            throw new AssertFailedException("The value for \"" + argName + "\" must be null");
+        }
+    }
+
+	/**
+	 * Verify that arg is not null. Throw an AssertFailedException if it is null.
+	 * @param arg - the method parameter value
+     * @param argName - the name of the parameter; used in the exception message
+	 * @throws AssertFailedException - if arg is null
+	 */
+    public static void notNull(Object arg, String argName) {
+		if (arg == null) {
+            throw new AssertFailedException("The value of \"" + argName + "\" is null");
+		}
+	}
+
+	/**
+	 * Verify that condition is true. Throw an AssertFailedException if it is false.
+	 * @param condition - the condition that should be true
+	 * @throws AssertFailedException - if condition is false
+	 */
+	public static void isTrue(boolean condition, String message) {
+		if (!condition) {
+			throw new AssertFailedException(message);
+		}
+	}
+
+	/**
+	 * Verify that condition is false. Throw an AssertFailedException if it is true.
+	 * @param condition - the condition that should be false
+	 * @throws AssertFailedException - if condition is true
+	 */
+	public static void isFalse(boolean condition, String message) {
+		if (condition) {
+			throw new AssertFailedException(message);
+		}
+	}
+
+	/**
+	 * Verify that the collection is not null or empty. Throw an 
+	 * AssertFailedException if it is null or empty.
+	 * @param collection - the Collection
+     * @param argName - the name of the parameter; used in the exception message
+	 * @throws AssertFailedException - if collection is null or empty
+	 */
+    public static void notNullOrEmpty(Collection collection, String argName) {
+        notNull(collection, argName);
+		if (collection.isEmpty()) {
+            throw new AssertFailedException("The \"" + argName + "\" Collection is empty");
+		}
+	}
+
+	/**
+	 * Verify that the Map is not null or empty. Throw an AssertFailedException 
+	 * if it is null or empty.
+	 * @param map - the Map
+     * @param argName - the name of the parameter; used in the exception message
+	 * @throws AssertFailedException - if map is null or empty
+	 */
+    public static void notNullOrEmpty(Map map, String argName) {
+        notNull(map, argName);
+		if (map.isEmpty()) {
+            throw new AssertFailedException("The \"" + argName + "\" Map is empty");
+		}
+	}
+
+	/**
+	 * Verify that the array is not null or empty. Throw an 
+	 * AssertFailedException if it is null or empty.
+	 * @param array - the array
+     * @param argName - the name of the parameter; used in the exception message
+	 * @throws AssertFailedException - if array is null or empty
+	 */
+    public static void notNullOrEmpty(Object[] array, String argName) {
+        notNull(array, argName);
+		if (array.length == 0) {
+            throw new AssertFailedException("The \"" + argName + "\" array is empty");
+		}
+	}
+
+	/**
+	 * Verify that the String is not null or empty. Throw an 
+	 * AssertFailedException if it is null or empty.
+	 * @param string - the String
+     * @param argName - the name of the parameter; used in the exception message
+	 * @throws AssertFailedException - if string is null or empty
+	 */
+    public static void notNullOrEmpty(String string, String argName) {
+        notNull(string, argName);
+		if (string.trim().length() == 0) {
+            throw new AssertFailedException("The \"" + argName + "\" String is empty");
+		}
+	}
+
+	/**
+	 * Private constructor. All methods are static
+	 */
+	private Assert() {
+	}
+}