commons-lang-2.6.jar - Apache Commons Lang
commons-lang-2.6.jar is the JAR file for Apache Commons Lang 2.6, which
provides a host of helper utilities for the java.lang API.
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File name: commons-lang-2.6.jar File size: 284220 bytes Date modified: 01/13/2011 Download: Apache Commons Lang Website
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⏎ org/apache/commons/lang/Validate.java
/*
* 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: Validate.java 1057051 2011-01-09 23:15:51Z sebb $
*/
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:
* " 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:
* " 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);
}
}
}
}
⏎ org/apache/commons/lang/Validate.java
⇒ commons-lang-1.0.1.jar - Apache Commons Lang
⇐ What Is commons-lang3-3.1.jar
2009-12-24, 80063👍, 0💬
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