src/main/java/org/apache/commons/lang/Validate.java - commons-lang - Git at Google

 /*
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.
  * The ASF licenses this file to You 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.apache.commons.lang;

 import java.util.Collection;
 import java.util.Iterator;
 import java.util.Map;

 /**
  * <p>This class assists in validating arguments.</p>
  *
  * <p>The class is based along the lines of JUnit. If an argument value is
  * deemed invalid, an IllegalArgumentException is thrown. For example:</p>
  *
  * <pre>
  * Validate.isTrue( i > 0, "The value must be greater than zero: ", i);
  * Validate.notNull( surname, "The surname must not be null");
  * </pre>
  *
  * @author Apache Software Foundation
  * @author <a href="mailto:ola.berg@arkitema.se">Ola Berg</a>
  * @author Gary Gregory
  * @author Norm Deane
  * @since 2.0
  * @version $Id$
  */
 public class Validate {
     // Validate has no dependencies on other classes in Commons Lang at present

     /**
      * Constructor. This class should not normally be instantiated.
      */
     public Validate() {
       super();
     }

     // isTrue
     //---------------------------------------------------------------------------------
     /**
      * <p>Validate that the argument condition is <code>true</code>; otherwise
      * throwing an exception with the specified message. This method is useful when
      * validating according to an arbitrary boolean expression, such as validating an
      * object or using your own custom validation expression.</p>
      *
      * <pre>Validate.isTrue( myObject.isOk(), "The object is not OK: ", myObject);</pre>
      *
      * <p>For performance reasons, the object value is passed as a separate parameter and
      * appended to the exception message only in the case of an error.</p>
      *
      * @param expression the boolean expression to check
      * @param message the exception message if invalid
      * @param value the value to append to the message when invalid
      * @throws IllegalArgumentException if expression is <code>false</code>
      */
     public static void isTrue(boolean expression, String message, Object value) {
         if (expression == false) {
             throw new IllegalArgumentException(message + value);
         }
     }

     /**
      * <p>Validate that the argument condition is <code>true</code>; otherwise
      * throwing an exception with the specified message. This method is useful when
      * validating according to an arbitrary boolean expression, such as validating a
      * primitive number or using your own custom validation expression.</p>
      *
      * <pre>Validate.isTrue(i > 0.0, "The value must be greater than zero: ", i);</pre>
      *
      * <p>For performance reasons, the long value is passed as a separate parameter and
      * appended to the exception message only in the case of an error.</p>
      *
      * @param expression the boolean expression to check
      * @param message the exception message if invalid
      * @param value the value to append to the message when invalid
      * @throws IllegalArgumentException if expression is <code>false</code>
      */
     public static void isTrue(boolean expression, String message, long value) {
         if (expression == false) {
             throw new IllegalArgumentException(message + value);
         }
     }

     /**
      * <p>Validate that the argument condition is <code>true</code>; otherwise
      * throwing an exception with the specified message. This method is useful when
      * validating according to an arbitrary boolean expression, such as validating a
      * primitive number or using your own custom validation expression.</p>
      *
      * <pre>Validate.isTrue(d > 0.0, "The value must be greater than zero: ", d);</pre>
      *
      * <p>For performance reasons, the double value is passed as a separate parameter and
      * appended to the exception message only in the case of an error.</p>
      *
      * @param expression the boolean expression to check
      * @param message the exception message if invalid
      * @param value the value to append to the message when invalid
      * @throws IllegalArgumentException if expression is <code>false</code>
      */
     public static void isTrue(boolean expression, String message, double value) {
         if (expression == false) {
             throw new IllegalArgumentException(message + value);
         }
     }

     /**
      * <p>Validate that the argument condition is <code>true</code>; otherwise
      * throwing an exception with the specified message. This method is useful when
      * validating according to an arbitrary boolean expression, such as validating a
      * primitive number or using your own custom validation expression.</p>
      *
      * <pre>
      * Validate.isTrue( (i > 0), "The value must be greater than zero");
      * Validate.isTrue( myObject.isOk(), "The object is not OK");
      * </pre>
      *
      * @param expression the boolean expression to check
      * @param message the exception message if invalid
      * @throws IllegalArgumentException if expression is <code>false</code>
      */
     public static void isTrue(boolean expression, String message) {
         if (expression == false) {
             throw new IllegalArgumentException(message);
         }
     }

     /**
      * <p>Validate that the argument condition is <code>true</code>; otherwise
      * throwing an exception. This method is useful when validating according
      * to an arbitrary boolean expression, such as validating a
      * primitive number or using your own custom validation expression.</p>
      *
      * <pre>
      * Validate.isTrue(i > 0);
      * Validate.isTrue(myObject.isOk());</pre>
      *
      * <p>The message of the exception is &quot;The validated expression is
      * false&quot;.</p>
      *
      * @param expression the boolean expression to check
      * @throws IllegalArgumentException if expression is <code>false</code>
      */
     public static void isTrue(boolean expression) {
         if (expression == false) {
             throw new IllegalArgumentException("The validated expression is false");
         }
     }

     // notNull
     //---------------------------------------------------------------------------------

     /**
      * <p>Validate that the specified argument is not <code>null</code>;
      * otherwise throwing an exception.
      *
      * <pre>Validate.notNull(myObject);</pre>
      *
      * <p>The message of the exception is &quot;The validated object is
      * null&quot;.</p>
      *
      * @param object the object to check
      * @throws IllegalArgumentException if the object is <code>null</code>
      */
     public static void notNull(Object object) {
         notNull(object, "The validated object is null");
     }

     /**
      * <p>Validate that the specified argument is not <code>null</code>;
      * otherwise throwing an exception with the specified message.
      *
      * <pre>Validate.notNull(myObject, "The object must not be null");</pre>
      *
      * @param object the object to check
      * @param message the exception message if invalid
      */
     public static void notNull(Object object, String message) {
         if (object == null) {
             throw new IllegalArgumentException(message);
         }
     }

     // notEmpty array
     //---------------------------------------------------------------------------------

     /**
      * <p>Validate that the specified argument array is neither <code>null</code>
      * nor a length of zero (no elements); otherwise throwing an exception
      * with the specified message.
      *
      * <pre>Validate.notEmpty(myArray, "The array must not be empty");</pre>
      *
      * @param array the array to check
      * @param message the exception message if invalid
      * @throws IllegalArgumentException if the array is empty
      */
     public static void notEmpty(Object[] array, String message) {
         if (array == null || array.length == 0) {
             throw new IllegalArgumentException(message);
         }
     }

     /**
      * <p>Validate that the specified argument array is neither <code>null</code>
      * nor a length of zero (no elements); otherwise throwing an exception.
      *
      * <pre>Validate.notEmpty(myArray);</pre>
      *
      * <p>The message in the exception is &quot;The validated array is
      * empty&quot;.
      *
      * @param array the array to check
      * @throws IllegalArgumentException if the array is empty
      */
     public static void notEmpty(Object[] array) {
         notEmpty(array, "The validated array is empty");
     }

     // notEmpty collection
     //---------------------------------------------------------------------------------

     /**
      * <p>Validate that the specified argument collection is neither <code>null</code>
      * nor a size of zero (no elements); otherwise throwing an exception
      * with the specified message.
      *
      * <pre>Validate.notEmpty(myCollection, "The collection must not be empty");</pre>
      *
      * @param collection the collection to check
      * @param message the exception message if invalid
      * @throws IllegalArgumentException if the collection is empty
      */
     public static void notEmpty(Collection collection, String message) {
         if (collection == null || collection.size() == 0) {
             throw new IllegalArgumentException(message);
         }
     }

     /**
      * <p>Validate that the specified argument collection is neither <code>null</code>
      * nor a size of zero (no elements); otherwise throwing an exception.
      *
      * <pre>Validate.notEmpty(myCollection);</pre>
      *
      * <p>The message in the exception is &quot;The validated collection is
      * empty&quot;.</p>
      *
      * @param collection the collection to check
      * @throws IllegalArgumentException if the collection is empty
      */
     public static void notEmpty(Collection collection) {
         notEmpty(collection, "The validated collection is empty");
     }

     // notEmpty map
     //---------------------------------------------------------------------------------

     /**
      * <p>Validate that the specified argument map is neither <code>null</code>
      * nor a size of zero (no elements); otherwise throwing an exception
      * with the specified message.
      *
      * <pre>Validate.notEmpty(myMap, "The map must not be empty");</pre>
      *
      * @param map the map to check
      * @param message the exception message if invalid
      * @throws IllegalArgumentException if the map is empty
      */
     public static void notEmpty(Map map, String message) {
         if (map == null || map.size() == 0) {
             throw new IllegalArgumentException(message);
         }
     }

     /**
      * <p>Validate that the specified argument map is neither <code>null</code>
      * nor a size of zero (no elements); otherwise throwing an exception.
      *
      * <pre>Validate.notEmpty(myMap);</pre>
      *
      * <p>The message in the exception is &quot;The validated map is
      * empty&quot;.</p>
      *
      * @param map the map to check
      * @throws IllegalArgumentException if the map is empty
      * @see #notEmpty(Map, String)
      */
     public static void notEmpty(Map map) {
         notEmpty(map, "The validated map is empty");
     }

     // notEmpty string
     //---------------------------------------------------------------------------------

     /**
      * <p>Validate that the specified argument string is
      * neither <code>null</code> nor a length of zero (no characters);
      * otherwise throwing an exception with the specified message.
      *
      * <pre>Validate.notEmpty(myString, "The string must not be empty");</pre>
      *
      * @param string the string to check
      * @param message the exception message if invalid
      * @throws IllegalArgumentException if the string is empty
      */
     public static void notEmpty(String string, String message) {
         if (string == null || string.length() == 0) {
             throw new IllegalArgumentException(message);
         }
     }

     /**
      * <p>Validate that the specified argument string is
      * neither <code>null</code> nor a length of zero (no characters);
      * otherwise throwing an exception with the specified message.
      *
      * <pre>Validate.notEmpty(myString);</pre>
      *
      * <p>The message in the exception is &quot;The validated
      * string is empty&quot;.</p>
      *
      * @param string the string to check
      * @throws IllegalArgumentException if the string is empty
      */
     public static void notEmpty(String string) {
         notEmpty(string, "The validated string is empty");
     }

     // notNullElements array
     //---------------------------------------------------------------------------------

     /**
      * <p>Validate that the specified argument array is neither
      * <code>null</code> nor contains any elements that are <code>null</code>;
      * otherwise throwing an exception with the specified message.
      *
      * <pre>Validate.noNullElements(myArray, "The array contain null at position %d");</pre>
      *
      * <p>If the array is <code>null</code>, then the message in the exception
      * is &quot;The validated object is null&quot;.</p>
      *
      * @param array the array to check
      * @param message the exception message if the collection has <code>null</code> elements
      * @throws IllegalArgumentException if the array is <code>null</code> or
      * an element in the array is <code>null</code>
      */
     public static void noNullElements(Object[] array, String message) {
         Validate.notNull(array);
         for (int i = 0; i < array.length; i++) {
             if (array[i] == null) {
                 throw new IllegalArgumentException(message);
             }
         }
     }

     /**
      * <p>Validate that the specified argument array is neither
      * <code>null</code> nor contains any elements that are <code>null</code>;
      * otherwise throwing an exception.
      *
      * <pre>Validate.noNullElements(myArray);</pre>
      *
      * <p>If the array is <code>null</code>, then the message in the exception
      * is &quot;The validated object is null&quot;.</p>
      *
      * <p>If the array has a <code>null</code> element, then the message in the
      * exception is &quot;The validated array contains null element at index:
      * &quot followed by the index.</p>
      *
      * @param array the array to check
      * @throws IllegalArgumentException if the array is <code>null</code> or
      * an element in the array is <code>null</code>
      */
     public static void noNullElements(Object[] array) {
         Validate.notNull(array);
         for (int i = 0; i < array.length; i++) {
             if (array[i] == null) {
                 throw new IllegalArgumentException("The validated array contains null element at index: " + i);
             }
         }
     }

     // notNullElements collection
     //---------------------------------------------------------------------------------

     /**
      * <p>Validate that the specified argument collection is neither
      * <code>null</code> nor contains any elements that are <code>null</code>;
      * otherwise throwing an exception with the specified message.
      *
      * <pre>Validate.noNullElements(myCollection, "The collection contains null elements");</pre>
      *
      * <p>If the collection is <code>null</code>, then the message in the exception
      * is &quot;The validated object is null&quot;.</p>
      *
      *
      * @param collection  the collection to check
      * @param message  the exception message if the collection has
      * @throws IllegalArgumentException if the collection is <code>null</code> or
      * an element in the collection is <code>null</code>
      */
     public static void noNullElements(Collection collection, String message) {
         Validate.notNull(collection);
         for (Iterator it = collection.iterator(); it.hasNext();) {
             if (it.next() == null) {
                 throw new IllegalArgumentException(message);
             }
         }
     }

     /**
      * <p>Validate that the specified argument collection is neither
      * <code>null</code> nor contains any elements that are <code>null</code>;
      * otherwise throwing an exception.
      *
      * <pre>Validate.noNullElements(myCollection);</pre>
      *
      * <p>If the collection is <code>null</code>, then the message in the exception
      * is &quot;The validated object is null&quot;.</p>
      *
      * <p>If the collection has a <code>null</code> element, then the message in the
      * exception is &quot;The validated collection contains null element at index:
      * &quot followed by the index.</p>
      *
      * @param collection  the collection to check
      * @throws IllegalArgumentException if the collection is <code>null</code> or
      * an element in the collection is <code>null</code>
      */
     public static void noNullElements(Collection collection) {
         Validate.notNull(collection);
         int i = 0;
         for (Iterator it = collection.iterator(); it.hasNext(); i++) {
             if (it.next() == null) {
                 throw new IllegalArgumentException("The validated collection contains null element at index: " + i);
             }
         }
     }

     /**
      * <p>Validate an argument, throwing <code>IllegalArgumentException</code>
      * if the argument collection  is <code>null</code> or has elements that
      * are not of type <code>clazz</code> or a subclass.</p>
      *
      * <pre>
      * Validate.allElementsOfType(collection, String.class, "Collection has invalid elements");
      * </pre>
      *
      * @param collection  the collection to check, not null
      * @param clazz  the <code>Class</code> which the collection's elements are expected to be, not null
      * @param message  the exception message if the <code>Collection</code> has elements not of type <code>clazz</code>
      * @since 2.1
      */
     public static void allElementsOfType(Collection collection, Class clazz, String message) {
         Validate.notNull(collection);
         Validate.notNull(clazz);
         for (Iterator it = collection.iterator(); it.hasNext(); ) {
             if (clazz.isInstance(it.next()) == false) {
                 throw new IllegalArgumentException(message);
             }
         }
     }

     /**
      * <p>
      * Validate an argument, throwing <code>IllegalArgumentException</code> if the argument collection is
      * <code>null</code> or has elements that are not of type <code>clazz</code> or a subclass.
      * </p>
      *
      * <pre>
      * Validate.allElementsOfType(collection, String.class);
      * </pre>
      *
      * <p>
      * The message in the exception is 'The validated collection contains an element not of type clazz at index: '.
      * </p>
      *
      * @param collection  the collection to check, not null
      * @param clazz  the <code>Class</code> which the collection's elements are expected to be, not null
      * @since 2.1
      */
     public static void allElementsOfType(Collection collection, Class clazz) {
         Validate.notNull(collection);
         Validate.notNull(clazz);
         int i = 0;
         for (Iterator it = collection.iterator(); it.hasNext(); i++) {
             if (clazz.isInstance(it.next()) == false) {
                 throw new IllegalArgumentException("The validated collection contains an element not of type "
                     + clazz.getName() + " at index: " + i);
             }
         }
     }

 }
	/*
	* Licensed to the Apache Software Foundation (ASF) under one or more
	* contributor license agreements. See the NOTICE file distributed with
	* this work for additional information regarding copyright ownership.
	* The ASF licenses this file to You 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.apache.commons.lang;

	import java.util.Collection;
	import java.util.Iterator;
	import java.util.Map;

	/**
	* <p>This class assists in validating arguments.</p>
	*
	* <p>The class is based along the lines of JUnit. If an argument value is
	* deemed invalid, an IllegalArgumentException is thrown. For example:</p>
	*
	* <pre>
	* Validate.isTrue( i > 0, "The value must be greater than zero: ", i);
	* Validate.notNull( surname, "The surname must not be null");
	* </pre>
	*
	* @author Apache Software Foundation
	* @author <a href="mailto:ola.berg@arkitema.se">Ola Berg</a>
	* @author Gary Gregory
	* @author Norm Deane
	* @since 2.0
	* @version $Id$
	*/
	public class Validate {
	// Validate has no dependencies on other classes in Commons Lang at present

	/**
	* Constructor. This class should not normally be instantiated.
	*/
	public Validate() {
	super();
	}

	// isTrue
	//---------------------------------------------------------------------------------
	/**
	* <p>Validate that the argument condition is <code>true</code>; otherwise
	* throwing an exception with the specified message. This method is useful when
	* validating according to an arbitrary boolean expression, such as validating an
	* object or using your own custom validation expression.</p>
	*
	* <pre>Validate.isTrue( myObject.isOk(), "The object is not OK: ", myObject);</pre>
	*
	* <p>For performance reasons, the object value is passed as a separate parameter and
	* appended to the exception message only in the case of an error.</p>
	*
	* @param expression the boolean expression to check
	* @param message the exception message if invalid
	* @param value the value to append to the message when invalid
	* @throws IllegalArgumentException if expression is <code>false</code>
	*/
	public static void isTrue(boolean expression, String message, Object value) {
	if (expression == false) {
	throw new IllegalArgumentException(message + value);
	}
	}

	/**
	* <p>Validate that the argument condition is <code>true</code>; otherwise
	* throwing an exception with the specified message. This method is useful when
	* validating according to an arbitrary boolean expression, such as validating a
	* primitive number or using your own custom validation expression.</p>
	*
	* <pre>Validate.isTrue(i > 0.0, "The value must be greater than zero: ", i);</pre>
	*
	* <p>For performance reasons, the long value is passed as a separate parameter and
	* appended to the exception message only in the case of an error.</p>
	*
	* @param expression the boolean expression to check
	* @param message the exception message if invalid
	* @param value the value to append to the message when invalid
	* @throws IllegalArgumentException if expression is <code>false</code>
	*/
	public static void isTrue(boolean expression, String message, long value) {
	if (expression == false) {
	throw new IllegalArgumentException(message + value);
	}
	}

	/**
	* <p>Validate that the argument condition is <code>true</code>; otherwise
	* throwing an exception with the specified message. This method is useful when
	* validating according to an arbitrary boolean expression, such as validating a
	* primitive number or using your own custom validation expression.</p>
	*
	* <pre>Validate.isTrue(d > 0.0, "The value must be greater than zero: ", d);</pre>
	*
	* <p>For performance reasons, the double value is passed as a separate parameter and
	* appended to the exception message only in the case of an error.</p>
	*
	* @param expression the boolean expression to check
	* @param message the exception message if invalid
	* @param value the value to append to the message when invalid
	* @throws IllegalArgumentException if expression is <code>false</code>
	*/
	public static void isTrue(boolean expression, String message, double value) {
	if (expression == false) {
	throw new IllegalArgumentException(message + value);
	}
	}

	/**
	* <p>Validate that the argument condition is <code>true</code>; otherwise
	* throwing an exception with the specified message. This method is useful when
	* validating according to an arbitrary boolean expression, such as validating a
	* primitive number or using your own custom validation expression.</p>
	*
	* <pre>
	* Validate.isTrue( (i > 0), "The value must be greater than zero");
	* Validate.isTrue( myObject.isOk(), "The object is not OK");
	* </pre>
	*
	* @param expression the boolean expression to check
	* @param message the exception message if invalid
	* @throws IllegalArgumentException if expression is <code>false</code>
	*/
	public static void isTrue(boolean expression, String message) {
	if (expression == false) {
	throw new IllegalArgumentException(message);
	}
	}

	/**
	* <p>Validate that the argument condition is <code>true</code>; otherwise
	* throwing an exception. This method is useful when validating according
	* to an arbitrary boolean expression, such as validating a
	* primitive number or using your own custom validation expression.</p>
	*
	* <pre>
	* Validate.isTrue(i > 0);
	* Validate.isTrue(myObject.isOk());</pre>
	*
	* <p>The message of the exception is "The validated expression is
	* false".</p>
	*
	* @param expression the boolean expression to check
	* @throws IllegalArgumentException if expression is <code>false</code>
	*/
	public static void isTrue(boolean expression) {
	if (expression == false) {
	throw new IllegalArgumentException("The validated expression is false");
	}
	}

	// notNull
	//---------------------------------------------------------------------------------

	/**
	* <p>Validate that the specified argument is not <code>null</code>;
	* otherwise throwing an exception.
	*
	* <pre>Validate.notNull(myObject);</pre>
	*
	* <p>The message of the exception is "The validated object is
	* null".</p>
	*
	* @param object the object to check
	* @throws IllegalArgumentException if the object is <code>null</code>
	*/
	public static void notNull(Object object) {
	notNull(object, "The validated object is null");
	}

	/**
	* <p>Validate that the specified argument is not <code>null</code>;
	* otherwise throwing an exception with the specified message.
	*
	* <pre>Validate.notNull(myObject, "The object must not be null");</pre>
	*
	* @param object the object to check
	* @param message the exception message if invalid
	*/
	public static void notNull(Object object, String message) {
	if (object == null) {
	throw new IllegalArgumentException(message);
	}
	}

	// notEmpty array
	//---------------------------------------------------------------------------------

	/**
	* <p>Validate that the specified argument array is neither <code>null</code>
	* nor a length of zero (no elements); otherwise throwing an exception
	* with the specified message.
	*
	* <pre>Validate.notEmpty(myArray, "The array must not be empty");</pre>
	*
	* @param array the array to check
	* @param message the exception message if invalid
	* @throws IllegalArgumentException if the array is empty
	*/
	public static void notEmpty(Object[] array, String message) {
	if (array == null \|\| array.length == 0) {
	throw new IllegalArgumentException(message);
	}
	}

	/**
	* <p>Validate that the specified argument array is neither <code>null</code>
	* nor a length of zero (no elements); otherwise throwing an exception.
	*
	* <pre>Validate.notEmpty(myArray);</pre>
	*
	* <p>The message in the exception is "The validated array is
	* empty".
	*
	* @param array the array to check
	* @throws IllegalArgumentException if the array is empty
	*/
	public static void notEmpty(Object[] array) {
	notEmpty(array, "The validated array is empty");
	}

	// notEmpty collection
	//---------------------------------------------------------------------------------

	/**
	* <p>Validate that the specified argument collection is neither <code>null</code>
	* nor a size of zero (no elements); otherwise throwing an exception
	* with the specified message.
	*
	* <pre>Validate.notEmpty(myCollection, "The collection must not be empty");</pre>
	*
	* @param collection the collection to check
	* @param message the exception message if invalid
	* @throws IllegalArgumentException if the collection is empty
	*/
	public static void notEmpty(Collection collection, String message) {
	if (collection == null \|\| collection.size() == 0) {
	throw new IllegalArgumentException(message);
	}
	}

	/**
	* <p>Validate that the specified argument collection is neither <code>null</code>
	* nor a size of zero (no elements); otherwise throwing an exception.
	*
	* <pre>Validate.notEmpty(myCollection);</pre>
	*
	* <p>The message in the exception is "The validated collection is
	* empty".</p>
	*
	* @param collection the collection to check
	* @throws IllegalArgumentException if the collection is empty
	*/
	public static void notEmpty(Collection collection) {
	notEmpty(collection, "The validated collection is empty");
	}

	// notEmpty map
	//---------------------------------------------------------------------------------

	/**
	* <p>Validate that the specified argument map is neither <code>null</code>
	* nor a size of zero (no elements); otherwise throwing an exception
	* with the specified message.
	*
	* <pre>Validate.notEmpty(myMap, "The map must not be empty");</pre>
	*
	* @param map the map to check
	* @param message the exception message if invalid
	* @throws IllegalArgumentException if the map is empty
	*/
	public static void notEmpty(Map map, String message) {
	if (map == null \|\| map.size() == 0) {
	throw new IllegalArgumentException(message);
	}
	}

	/**
	* <p>Validate that the specified argument map is neither <code>null</code>
	* nor a size of zero (no elements); otherwise throwing an exception.
	*
	* <pre>Validate.notEmpty(myMap);</pre>
	*
	* <p>The message in the exception is "The validated map is
	* empty".</p>
	*
	* @param map the map to check
	* @throws IllegalArgumentException if the map is empty
	* @see #notEmpty(Map, String)
	*/
	public static void notEmpty(Map map) {
	notEmpty(map, "The validated map is empty");
	}

	// notEmpty string
	//---------------------------------------------------------------------------------

	/**
	* <p>Validate that the specified argument string is
	* neither <code>null</code> nor a length of zero (no characters);
	* otherwise throwing an exception with the specified message.
	*
	* <pre>Validate.notEmpty(myString, "The string must not be empty");</pre>
	*
	* @param string the string to check
	* @param message the exception message if invalid
	* @throws IllegalArgumentException if the string is empty
	*/
	public static void notEmpty(String string, String message) {
	if (string == null \|\| string.length() == 0) {
	throw new IllegalArgumentException(message);
	}
	}

	/**
	* <p>Validate that the specified argument string is
	* neither <code>null</code> nor a length of zero (no characters);
	* otherwise throwing an exception with the specified message.
	*
	* <pre>Validate.notEmpty(myString);</pre>
	*
	* <p>The message in the exception is "The validated
	* string is empty".</p>
	*
	* @param string the string to check
	* @throws IllegalArgumentException if the string is empty
	*/
	public static void notEmpty(String string) {
	notEmpty(string, "The validated string is empty");
	}

	// notNullElements array
	//---------------------------------------------------------------------------------

	/**
	* <p>Validate that the specified argument array is neither
	* <code>null</code> nor contains any elements that are <code>null</code>;
	* otherwise throwing an exception with the specified message.
	*
	* <pre>Validate.noNullElements(myArray, "The array contain null at position %d");</pre>
	*
	* <p>If the array is <code>null</code>, then the message in the exception
	* is "The validated object is null".</p>
	*
	* @param array the array to check
	* @param message the exception message if the collection has <code>null</code> elements
	* @throws IllegalArgumentException if the array is <code>null</code> or
	* an element in the array is <code>null</code>
	*/
	public static void noNullElements(Object[] array, String message) {
	Validate.notNull(array);
	for (int i = 0; i < array.length; i++) {
	if (array[i] == null) {
	throw new IllegalArgumentException(message);
	}
	}
	}

	/**
	* <p>Validate that the specified argument array is neither
	* <code>null</code> nor contains any elements that are <code>null</code>;
	* otherwise throwing an exception.
	*
	* <pre>Validate.noNullElements(myArray);</pre>
	*
	* <p>If the array is <code>null</code>, then the message in the exception
	* is "The validated object is null".</p>
	*
	* <p>If the array has a <code>null</code> element, then the message in the
	* exception is "The validated array contains null element at index:
	* &quot followed by the index.</p>
	*
	* @param array the array to check
	* @throws IllegalArgumentException if the array is <code>null</code> or
	* an element in the array is <code>null</code>
	*/
	public static void noNullElements(Object[] array) {
	Validate.notNull(array);
	for (int i = 0; i < array.length; i++) {
	if (array[i] == null) {
	throw new IllegalArgumentException("The validated array contains null element at index: " + i);
	}
	}
	}

	// notNullElements collection
	//---------------------------------------------------------------------------------

	/**
	* <p>Validate that the specified argument collection is neither
	* <code>null</code> nor contains any elements that are <code>null</code>;
	* otherwise throwing an exception with the specified message.
	*
	* <pre>Validate.noNullElements(myCollection, "The collection contains null elements");</pre>
	*
	* <p>If the collection is <code>null</code>, then the message in the exception
	* is "The validated object is null".</p>
	*
	*
	* @param collection the collection to check
	* @param message the exception message if the collection has
	* @throws IllegalArgumentException if the collection is <code>null</code> or
	* an element in the collection is <code>null</code>
	*/
	public static void noNullElements(Collection collection, String message) {
	Validate.notNull(collection);
	for (Iterator it = collection.iterator(); it.hasNext();) {
	if (it.next() == null) {
	throw new IllegalArgumentException(message);
	}
	}
	}

	/**
	* <p>Validate that the specified argument collection is neither
	* <code>null</code> nor contains any elements that are <code>null</code>;
	* otherwise throwing an exception.
	*
	* <pre>Validate.noNullElements(myCollection);</pre>
	*
	* <p>If the collection is <code>null</code>, then the message in the exception
	* is "The validated object is null".</p>
	*
	* <p>If the collection has a <code>null</code> element, then the message in the
	* exception is "The validated collection contains null element at index:
	* &quot followed by the index.</p>
	*
	* @param collection the collection to check
	* @throws IllegalArgumentException if the collection is <code>null</code> or
	* an element in the collection is <code>null</code>
	*/
	public static void noNullElements(Collection collection) {
	Validate.notNull(collection);
	int i = 0;
	for (Iterator it = collection.iterator(); it.hasNext(); i++) {
	if (it.next() == null) {
	throw new IllegalArgumentException("The validated collection contains null element at index: " + i);
	}
	}
	}

	/**
	* <p>Validate an argument, throwing <code>IllegalArgumentException</code>
	* if the argument collection is <code>null</code> or has elements that
	* are not of type <code>clazz</code> or a subclass.</p>
	*
	* <pre>
	* Validate.allElementsOfType(collection, String.class, "Collection has invalid elements");
	* </pre>
	*
	* @param collection the collection to check, not null
	* @param clazz the <code>Class</code> which the collection's elements are expected to be, not null
	* @param message the exception message if the <code>Collection</code> has elements not of type <code>clazz</code>
	* @since 2.1
	*/
	public static void allElementsOfType(Collection collection, Class clazz, String message) {
	Validate.notNull(collection);
	Validate.notNull(clazz);
	for (Iterator it = collection.iterator(); it.hasNext(); ) {
	if (clazz.isInstance(it.next()) == false) {
	throw new IllegalArgumentException(message);
	}
	}
	}

	/**
	* <p>
	* Validate an argument, throwing <code>IllegalArgumentException</code> if the argument collection is
	* <code>null</code> or has elements that are not of type <code>clazz</code> or a subclass.
	* </p>
	*
	* <pre>
	* Validate.allElementsOfType(collection, String.class);
	* </pre>
	*
	* <p>
	* The message in the exception is 'The validated collection contains an element not of type clazz at index: '.
	* </p>
	*
	* @param collection the collection to check, not null
	* @param clazz the <code>Class</code> which the collection's elements are expected to be, not null
	* @since 2.1
	*/
	public static void allElementsOfType(Collection collection, Class clazz) {
	Validate.notNull(collection);
	Validate.notNull(clazz);
	int i = 0;
	for (Iterator it = collection.iterator(); it.hasNext(); i++) {
	if (clazz.isInstance(it.next()) == false) {
	throw new IllegalArgumentException("The validated collection contains an element not of type "
	+ clazz.getName() + " at index: " + i);
	}
	}
	}

	}