Java example source code file (Validate.java)
The Validate.java Java example source code/*
* 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.lang3;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
import java.util.regex.Pattern;
/**
* <p>This class assists in validating arguments. The validation methods are
* based along the following principles:
* <ul>
* <li>An invalid {@code null} argument causes a {@link NullPointerException}.
* <li>A non-{@code null} argument causes an {@link IllegalArgumentException}.
* <li>An invalid index into an array/collection/map/string causes an {@link IndexOutOfBoundsException}.
* </ul>
*
* <p>All exceptions messages are
* <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/util/Formatter.html#syntax">format strings
* as defined by the Java platform. For example:</p>
*
* <pre>
* Validate.isTrue(i > 0, "The value must be greater than zero: %d", i);
* Validate.notNull(surname, "The surname must not be %s", null);
* </pre>
*
* <p>#ThreadSafe#
* @see java.lang.String#format(String, Object...)
* @since 2.0
*/
public class Validate {
private static final String DEFAULT_NOT_NAN_EX_MESSAGE =
"The validated value is not a number";
private static final String DEFAULT_FINITE_EX_MESSAGE =
"The value is invalid: %f";
private static final String DEFAULT_GREATER_EX_MESSAGE =
"The value %s is not greater than %s";
private static final String DEFAULT_GREATER_OR_EQUAL_EX_MESSAGE =
"The value %s is not greater than or equal to %s";
private static final String DEFAULT_SMALLER_EX_MESSAGE =
"The value %s is not smaller than %s";
private static final String DEFAULT_SMALLER_OR_EQUAL_EX_MESSAGE =
"The value %s is not smaller than or equal to %s";
private static final String DEFAULT_DIFFERENT_EX_MESSAGE =
"The value %s is invalid";
private static final String DEFAULT_EXCLUSIVE_BETWEEN_EX_MESSAGE =
"The value %s is not in the specified exclusive range of %s to %s";
private static final String DEFAULT_INCLUSIVE_BETWEEN_EX_MESSAGE =
"The value %s is not in the specified inclusive range of %s to %s";
private static final String DEFAULT_MATCHES_PATTERN_EX = "The string %s does not match the pattern %s";
private static final String DEFAULT_IS_NULL_EX_MESSAGE = "The validated object is null";
private static final String DEFAULT_IS_TRUE_EX_MESSAGE = "The validated expression is false";
private static final String DEFAULT_NO_NULL_ELEMENTS_ARRAY_EX_MESSAGE =
"The validated array contains null element at index: %d";
private static final String DEFAULT_NO_NULL_ELEMENTS_COLLECTION_EX_MESSAGE =
"The validated collection contains null element at index: %d";
private static final String DEFAULT_NOT_BLANK_EX_MESSAGE = "The validated character sequence is blank";
private static final String DEFAULT_NOT_EMPTY_ARRAY_EX_MESSAGE = "The validated array is empty";
private static final String DEFAULT_NOT_EMPTY_CHAR_SEQUENCE_EX_MESSAGE =
"The validated character sequence is empty";
private static final String DEFAULT_NOT_EMPTY_COLLECTION_EX_MESSAGE = "The validated collection is empty";
private static final String DEFAULT_NOT_EMPTY_MAP_EX_MESSAGE = "The validated map is empty";
private static final String DEFAULT_VALID_INDEX_ARRAY_EX_MESSAGE = "The validated array index is invalid: %d";
private static final String DEFAULT_VALID_INDEX_CHAR_SEQUENCE_EX_MESSAGE =
"The validated character sequence index is invalid: %d";
private static final String DEFAULT_VALID_INDEX_COLLECTION_EX_MESSAGE =
"The validated collection index is invalid: %d";
private static final String DEFAULT_VALID_STATE_EX_MESSAGE = "The validated state is false";
private static final String DEFAULT_IS_ASSIGNABLE_EX_MESSAGE = "Cannot assign a %s to a %s";
private static final String DEFAULT_IS_INSTANCE_OF_EX_MESSAGE = "Expected type: %s, actual: %s";
/**
* Constructor. This class should not normally be instantiated.
*/
public Validate() {
super();
}
// isTrue
//---------------------------------------------------------------------------------
/**
* <p>Validate that the argument condition is {@code true}; 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: %d", i);
*
* <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 {@link String#format(String, Object...)} exception message if invalid, not null
* @param value the value to append to the message when invalid
* @throws IllegalArgumentException if expression is {@code false}
* @see #isTrue(boolean)
* @see #isTrue(boolean, String, double)
* @see #isTrue(boolean, String, Object...)
*/
public static void isTrue(final boolean expression, final String message, final long value) {
if (expression == false) {
throw new IllegalArgumentException(String.format(message, Long.valueOf(value)));
}
}
/**
* <p>Validate that the argument condition is {@code true}; 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: %s", d);
*
* <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 {@link String#format(String, Object...)} exception message if invalid, not null
* @param value the value to append to the message when invalid
* @throws IllegalArgumentException if expression is {@code false}
* @see #isTrue(boolean)
* @see #isTrue(boolean, String, long)
* @see #isTrue(boolean, String, Object...)
*/
public static void isTrue(final boolean expression, final String message, final double value) {
if (expression == false) {
throw new IllegalArgumentException(String.format(message, Double.valueOf(value)));
}
}
/**
* <p>Validate that the argument condition is {@code true}; 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 >= min && i <= max, "The value must be between %d and %d", min, max);
* Validate.isTrue(myObject.isOk(), "The object is not okay");</pre>
*
* @param expression the boolean expression to check
* @param message the {@link String#format(String, Object...)} exception message if invalid, not null
* @param values the optional values for the formatted exception message, null array not recommended
* @throws IllegalArgumentException if expression is {@code false}
* @see #isTrue(boolean)
* @see #isTrue(boolean, String, long)
* @see #isTrue(boolean, String, double)
*/
public static void isTrue(final boolean expression, final String message, final Object... values) {
if (expression == false) {
throw new IllegalArgumentException(String.format(message, values));
}
}
/**
* <p>Validate that the argument condition is {@code true}; 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}
* @see #isTrue(boolean, String, long)
* @see #isTrue(boolean, String, double)
* @see #isTrue(boolean, String, Object...)
*/
public static void isTrue(final boolean expression) {
if (expression == false) {
throw new IllegalArgumentException(DEFAULT_IS_TRUE_EX_MESSAGE);
}
}
// notNull
//---------------------------------------------------------------------------------
/**
* <p>Validate that the specified argument is not {@code null};
* otherwise throwing an exception.
*
* <pre>Validate.notNull(myObject, "The object must not be null");
*
* <p>The message of the exception is "The validated object is
* null".</p>
*
* @param <T> the object type
* @param object the object to check
* @return the validated object (never {@code null} for method chaining)
* @throws NullPointerException if the object is {@code null}
* @see #notNull(Object, String, Object...)
*/
public static <T> T notNull(final T object) {
return notNull(object, DEFAULT_IS_NULL_EX_MESSAGE);
}
/**
* <p>Validate that the specified argument is not {@code null};
* otherwise throwing an exception with the specified message.
*
* <pre>Validate.notNull(myObject, "The object must not be null");
*
* @param <T> the object type
* @param object the object to check
* @param message the {@link String#format(String, Object...)} exception message if invalid, not null
* @param values the optional values for the formatted exception message
* @return the validated object (never {@code null} for method chaining)
* @throws NullPointerException if the object is {@code null}
* @see #notNull(Object)
*/
public static <T> T notNull(final T object, final String message, final Object... values) {
if (object == null) {
throw new NullPointerException(String.format(message, values));
}
return object;
}
// notEmpty array
//---------------------------------------------------------------------------------
/**
* <p>Validate that the specified argument array is neither {@code null}
* 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");
*
* @param <T> the array type
* @param array the array to check, validated not null by this method
* @param message the {@link String#format(String, Object...)} exception message if invalid, not null
* @param values the optional values for the formatted exception message, null array not recommended
* @return the validated array (never {@code null} method for chaining)
* @throws NullPointerException if the array is {@code null}
* @throws IllegalArgumentException if the array is empty
* @see #notEmpty(Object[])
*/
public static <T> T[] notEmpty(final T[] array, final String message, final Object... values) {
if (array == null) {
throw new NullPointerException(String.format(message, values));
}
if (array.length == 0) {
throw new IllegalArgumentException(String.format(message, values));
}
return array;
}
/**
* <p>Validate that the specified argument array is neither {@code null}
* nor a length of zero (no elements); otherwise throwing an exception.
*
* <pre>Validate.notEmpty(myArray);
*
* <p>The message in the exception is "The validated array is
* empty".
*
* @param <T> the array type
* @param array the array to check, validated not null by this method
* @return the validated array (never {@code null} method for chaining)
* @throws NullPointerException if the array is {@code null}
* @throws IllegalArgumentException if the array is empty
* @see #notEmpty(Object[], String, Object...)
*/
public static <T> T[] notEmpty(final T[] array) {
return notEmpty(array, DEFAULT_NOT_EMPTY_ARRAY_EX_MESSAGE);
}
// notEmpty collection
//---------------------------------------------------------------------------------
/**
* <p>Validate that the specified argument collection is neither {@code null}
* 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");
*
* @param <T> the collection type
* @param collection the collection to check, validated not null by this method
* @param message the {@link String#format(String, Object...)} exception message if invalid, not null
* @param values the optional values for the formatted exception message, null array not recommended
* @return the validated collection (never {@code null} method for chaining)
* @throws NullPointerException if the collection is {@code null}
* @throws IllegalArgumentException if the collection is empty
* @see #notEmpty(Object[])
*/
public static <T extends Collection T notEmpty(final T collection, final String message, final Object... values) {
if (collection == null) {
throw new NullPointerException(String.format(message, values));
}
if (collection.isEmpty()) {
throw new IllegalArgumentException(String.format(message, values));
}
return collection;
}
/**
* <p>Validate that the specified argument collection is neither {@code null}
* nor a size of zero (no elements); otherwise throwing an exception.
*
* <pre>Validate.notEmpty(myCollection);
*
* <p>The message in the exception is "The validated collection is
* empty".</p>
*
* @param <T> the collection type
* @param collection the collection to check, validated not null by this method
* @return the validated collection (never {@code null} method for chaining)
* @throws NullPointerException if the collection is {@code null}
* @throws IllegalArgumentException if the collection is empty
* @see #notEmpty(Collection, String, Object...)
*/
public static <T extends Collection T notEmpty(final T collection) {
return notEmpty(collection, DEFAULT_NOT_EMPTY_COLLECTION_EX_MESSAGE);
}
// notEmpty map
//---------------------------------------------------------------------------------
/**
* <p>Validate that the specified argument map is neither {@code null}
* 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");
*
* @param <T> the map type
* @param map the map to check, validated not null by this method
* @param message the {@link String#format(String, Object...)} exception message if invalid, not null
* @param values the optional values for the formatted exception message, null array not recommended
* @return the validated map (never {@code null} method for chaining)
* @throws NullPointerException if the map is {@code null}
* @throws IllegalArgumentException if the map is empty
* @see #notEmpty(Object[])
*/
public static <T extends Map T notEmpty(final T map, final String message, final Object... values) {
if (map == null) {
throw new NullPointerException(String.format(message, values));
}
if (map.isEmpty()) {
throw new IllegalArgumentException(String.format(message, values));
}
return map;
}
/**
* <p>Validate that the specified argument map is neither {@code null}
* nor a size of zero (no elements); otherwise throwing an exception.
*
* <pre>Validate.notEmpty(myMap);
*
* <p>The message in the exception is "The validated map is
* empty".</p>
*
* @param <T> the map type
* @param map the map to check, validated not null by this method
* @return the validated map (never {@code null} method for chaining)
* @throws NullPointerException if the map is {@code null}
* @throws IllegalArgumentException if the map is empty
* @see #notEmpty(Map, String, Object...)
*/
public static <T extends Map T notEmpty(final T map) {
return notEmpty(map, DEFAULT_NOT_EMPTY_MAP_EX_MESSAGE);
}
// notEmpty string
//---------------------------------------------------------------------------------
/**
* <p>Validate that the specified argument character sequence is
* neither {@code null} 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");
*
* @param <T> the character sequence type
* @param chars the character sequence to check, validated not null by this method
* @param message the {@link String#format(String, Object...)} exception message if invalid, not null
* @param values the optional values for the formatted exception message, null array not recommended
* @return the validated character sequence (never {@code null} method for chaining)
* @throws NullPointerException if the character sequence is {@code null}
* @throws IllegalArgumentException if the character sequence is empty
* @see #notEmpty(CharSequence)
*/
public static <T extends CharSequence> T notEmpty(final T chars, final String message, final Object... values) {
if (chars == null) {
throw new NullPointerException(String.format(message, values));
}
if (chars.length() == 0) {
throw new IllegalArgumentException(String.format(message, values));
}
return chars;
}
/**
* <p>Validate that the specified argument character sequence is
* neither {@code null} nor a length of zero (no characters);
* otherwise throwing an exception with the specified message.
*
* <pre>Validate.notEmpty(myString);
*
* <p>The message in the exception is "The validated
* character sequence is empty".</p>
*
* @param <T> the character sequence type
* @param chars the character sequence to check, validated not null by this method
* @return the validated character sequence (never {@code null} method for chaining)
* @throws NullPointerException if the character sequence is {@code null}
* @throws IllegalArgumentException if the character sequence is empty
* @see #notEmpty(CharSequence, String, Object...)
*/
public static <T extends CharSequence> T notEmpty(final T chars) {
return notEmpty(chars, DEFAULT_NOT_EMPTY_CHAR_SEQUENCE_EX_MESSAGE);
}
// notBlank string
//---------------------------------------------------------------------------------
/**
* <p>Validate that the specified argument character sequence is
* neither {@code null}, a length of zero (no characters), empty
* nor whitespace; otherwise throwing an exception with the specified
* message.
*
* <pre>Validate.notBlank(myString, "The string must not be blank");
*
* @param <T> the character sequence type
* @param chars the character sequence to check, validated not null by this method
* @param message the {@link String#format(String, Object...)} exception message if invalid, not null
* @param values the optional values for the formatted exception message, null array not recommended
* @return the validated character sequence (never {@code null} method for chaining)
* @throws NullPointerException if the character sequence is {@code null}
* @throws IllegalArgumentException if the character sequence is blank
* @see #notBlank(CharSequence)
*
* @since 3.0
*/
public static <T extends CharSequence> T notBlank(final T chars, final String message, final Object... values) {
if (chars == null) {
throw new NullPointerException(String.format(message, values));
}
if (StringUtils.isBlank(chars)) {
throw new IllegalArgumentException(String.format(message, values));
}
return chars;
}
/**
* <p>Validate that the specified argument character sequence is
* neither {@code null}, a length of zero (no characters), empty
* nor whitespace; otherwise throwing an exception.
*
* <pre>Validate.notBlank(myString);
*
* <p>The message in the exception is "The validated character
* sequence is blank".</p>
*
* @param <T> the character sequence type
* @param chars the character sequence to check, validated not null by this method
* @return the validated character sequence (never {@code null} method for chaining)
* @throws NullPointerException if the character sequence is {@code null}
* @throws IllegalArgumentException if the character sequence is blank
* @see #notBlank(CharSequence, String, Object...)
*
* @since 3.0
*/
public static <T extends CharSequence> T notBlank(final T chars) {
return notBlank(chars, DEFAULT_NOT_BLANK_EX_MESSAGE);
}
// noNullElements array
//---------------------------------------------------------------------------------
/**
* <p>Validate that the specified argument array is neither
* {@code null} nor contains any elements that are {@code null};
* otherwise throwing an exception with the specified message.
*
* <pre>Validate.noNullElements(myArray, "The array contain null at position %d");
*
* <p>If the array is {@code null}, then the message in the exception
* is "The validated object is null".</p>
*
* <p>If the array has a {@code null} element, then the iteration
* index of the invalid element is appended to the {@code values}
* argument.</p>
*
* @param <T> the array type
* @param array the array to check, validated not null by this method
* @param message the {@link String#format(String, Object...)} exception message if invalid, not null
* @param values the optional values for the formatted exception message, null array not recommended
* @return the validated array (never {@code null} method for chaining)
* @throws NullPointerException if the array is {@code null}
* @throws IllegalArgumentException if an element is {@code null}
* @see #noNullElements(Object[])
*/
public static <T> T[] noNullElements(final T[] array, final String message, final Object... values) {
Validate.notNull(array);
for (int i = 0; i < array.length; i++) {
if (array[i] == null) {
final Object[] values2 = ArrayUtils.add(values, Integer.valueOf(i));
throw new IllegalArgumentException(String.format(message, values2));
}
}
return array;
}
/**
* <p>Validate that the specified argument array is neither
* {@code null} nor contains any elements that are {@code null};
* otherwise throwing an exception.</p>
*
* <pre>Validate.noNullElements(myArray);
*
* <p>If the array is {@code null}, then the message in the exception
* is "The validated object is null".</p>
*
* <p>If the array has a {@code null} element, then the message in the
* exception is "The validated array contains null element at index:
* " followed by the index.</p>
*
* @param <T> the array type
* @param array the array to check, validated not null by this method
* @return the validated array (never {@code null} method for chaining)
* @throws NullPointerException if the array is {@code null}
* @throws IllegalArgumentException if an element is {@code null}
* @see #noNullElements(Object[], String, Object...)
*/
public static <T> T[] noNullElements(final T[] array) {
return noNullElements(array, DEFAULT_NO_NULL_ELEMENTS_ARRAY_EX_MESSAGE);
}
// noNullElements iterable
//---------------------------------------------------------------------------------
/**
* <p>Validate that the specified argument iterable is neither
* {@code null} nor contains any elements that are {@code null};
* otherwise throwing an exception with the specified message.
*
* <pre>Validate.noNullElements(myCollection, "The collection contains null at position %d");
*
* <p>If the iterable is {@code null}, then the message in the exception
* is "The validated object is null".</p>
*
* <p>If the iterable has a {@code null} element, then the iteration
* index of the invalid element is appended to the {@code values}
* argument.</p>
*
* @param <T> the iterable type
* @param iterable the iterable to check, validated not null by this method
* @param message the {@link String#format(String, Object...)} exception message if invalid, not null
* @param values the optional values for the formatted exception message, null array not recommended
* @return the validated iterable (never {@code null} method for chaining)
* @throws NullPointerException if the array is {@code null}
* @throws IllegalArgumentException if an element is {@code null}
* @see #noNullElements(Iterable)
*/
public static <T extends Iterable T noNullElements(final T iterable, final String message, final Object... values) {
Validate.notNull(iterable);
int i = 0;
for (final Iterator<?> it = iterable.iterator(); it.hasNext(); i++) {
if (it.next() == null) {
final Object[] values2 = ArrayUtils.addAll(values, Integer.valueOf(i));
throw new IllegalArgumentException(String.format(message, values2));
}
}
return iterable;
}
/**
* <p>Validate that the specified argument iterable is neither
* {@code null} nor contains any elements that are {@code null};
* otherwise throwing an exception.
*
* <pre>Validate.noNullElements(myCollection);
*
* <p>If the iterable is {@code null}, then the message in the exception
* is "The validated object is null".</p>
*
* <p>If the array has a {@code null} element, then the message in the
* exception is "The validated iterable contains null element at index:
* " followed by the index.</p>
*
* @param <T> the iterable type
* @param iterable the iterable to check, validated not null by this method
* @return the validated iterable (never {@code null} method for chaining)
* @throws NullPointerException if the array is {@code null}
* @throws IllegalArgumentException if an element is {@code null}
* @see #noNullElements(Iterable, String, Object...)
*/
public static <T extends Iterable T noNullElements(final T iterable) {
return noNullElements(iterable, DEFAULT_NO_NULL_ELEMENTS_COLLECTION_EX_MESSAGE);
}
// validIndex array
//---------------------------------------------------------------------------------
/**
* <p>Validates that the index is within the bounds of the argument
* array; otherwise throwing an exception with the specified message.</p>
*
* <pre>Validate.validIndex(myArray, 2, "The array index is invalid: ");
*
* <p>If the array is {@code null}, then the message of the exception
* is "The validated object is null".</p>
*
* @param <T> the array type
* @param array the array to check, validated not null by this method
* @param index the index to check
* @param message the {@link String#format(String, Object...)} exception message if invalid, not null
* @param values the optional values for the formatted exception message, null array not recommended
* @return the validated array (never {@code null} for method chaining)
* @throws NullPointerException if the array is {@code null}
* @throws IndexOutOfBoundsException if the index is invalid
* @see #validIndex(Object[], int)
*
* @since 3.0
*/
public static <T> T[] validIndex(final T[] array, final int index, final String message, final Object... values) {
Validate.notNull(array);
if (index < 0 || index >= array.length) {
throw new IndexOutOfBoundsException(String.format(message, values));
}
return array;
}
/**
* <p>Validates that the index is within the bounds of the argument
* array; otherwise throwing an exception.</p>
*
* <pre>Validate.validIndex(myArray, 2);
*
* <p>If the array is {@code null}, then the message of the exception
* is "The validated object is null".</p>
*
* <p>If the index is invalid, then the message of the exception is
* "The validated array index is invalid: " followed by the
* index.</p>
*
* @param <T> the array type
* @param array the array to check, validated not null by this method
* @param index the index to check
* @return the validated array (never {@code null} for method chaining)
* @throws NullPointerException if the array is {@code null}
* @throws IndexOutOfBoundsException if the index is invalid
* @see #validIndex(Object[], int, String, Object...)
*
* @since 3.0
*/
public static <T> T[] validIndex(final T[] array, final int index) {
return validIndex(array, index, DEFAULT_VALID_INDEX_ARRAY_EX_MESSAGE, Integer.valueOf(index));
}
// validIndex collection
//---------------------------------------------------------------------------------
/**
* <p>Validates that the index is within the bounds of the argument
* collection; otherwise throwing an exception with the specified message.</p>
*
* <pre>Validate.validIndex(myCollection, 2, "The collection index is invalid: ");
*
* <p>If the collection is {@code null}, then the message of the
* exception is "The validated object is null".</p>
*
* @param <T> the collection type
* @param collection the collection to check, validated not null by this method
* @param index the index to check
* @param message the {@link String#format(String, Object...)} exception message if invalid, not null
* @param values the optional values for the formatted exception message, null array not recommended
* @return the validated collection (never {@code null} for chaining)
* @throws NullPointerException if the collection is {@code null}
* @throws IndexOutOfBoundsException if the index is invalid
* @see #validIndex(Collection, int)
*
* @since 3.0
*/
public static <T extends Collection T validIndex(final T collection, final int index, final String message, final Object... values) {
Validate.notNull(collection);
if (index < 0 || index >= collection.size()) {
throw new IndexOutOfBoundsException(String.format(message, values));
}
return collection;
}
/**
* <p>Validates that the index is within the bounds of the argument
* collection; otherwise throwing an exception.</p>
*
* <pre>Validate.validIndex(myCollection, 2);
*
* <p>If the index is invalid, then the message of the exception
* is "The validated collection index is invalid: "
* followed by the index.</p>
*
* @param <T> the collection type
* @param collection the collection to check, validated not null by this method
* @param index the index to check
* @return the validated collection (never {@code null} for method chaining)
* @throws NullPointerException if the collection is {@code null}
* @throws IndexOutOfBoundsException if the index is invalid
* @see #validIndex(Collection, int, String, Object...)
*
* @since 3.0
*/
public static <T extends Collection T validIndex(final T collection, final int index) {
return validIndex(collection, index, DEFAULT_VALID_INDEX_COLLECTION_EX_MESSAGE, Integer.valueOf(index));
}
// validIndex string
//---------------------------------------------------------------------------------
/**
* <p>Validates that the index is within the bounds of the argument
* character sequence; otherwise throwing an exception with the
* specified message.</p>
*
* <pre>Validate.validIndex(myStr, 2, "The string index is invalid: ");
*
* <p>If the character sequence is {@code null}, then the message
* of the exception is "The validated object is null".</p>
*
* @param <T> the character sequence type
* @param chars the character sequence to check, validated not null by this method
* @param index the index to check
* @param message the {@link String#format(String, Object...)} exception message if invalid, not null
* @param values the optional values for the formatted exception message, null array not recommended
* @return the validated character sequence (never {@code null} for method chaining)
* @throws NullPointerException if the character sequence is {@code null}
* @throws IndexOutOfBoundsException if the index is invalid
* @see #validIndex(CharSequence, int)
*
* @since 3.0
*/
public static <T extends CharSequence> T validIndex(final T chars, final int index, final String message, final Object... values) {
Validate.notNull(chars);
if (index < 0 || index >= chars.length()) {
throw new IndexOutOfBoundsException(String.format(message, values));
}
return chars;
}
/**
* <p>Validates that the index is within the bounds of the argument
* character sequence; otherwise throwing an exception.</p>
*
* <pre>Validate.validIndex(myStr, 2);
*
* <p>If the character sequence is {@code null}, then the message
* of the exception is "The validated object is
* null".</p>
*
* <p>If the index is invalid, then the message of the exception
* is "The validated character sequence index is invalid: "
* followed by the index.</p>
*
* @param <T> the character sequence type
* @param chars the character sequence to check, validated not null by this method
* @param index the index to check
* @return the validated character sequence (never {@code null} for method chaining)
* @throws NullPointerException if the character sequence is {@code null}
* @throws IndexOutOfBoundsException if the index is invalid
* @see #validIndex(CharSequence, int, String, Object...)
*
* @since 3.0
*/
public static <T extends CharSequence> T validIndex(final T chars, final int index) {
return validIndex(chars, index, DEFAULT_VALID_INDEX_CHAR_SEQUENCE_EX_MESSAGE, Integer.valueOf(index));
}
// validState
//---------------------------------------------------------------------------------
/**
* <p>Validate that the stateful condition is {@code true}; 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.validState(field > 0);
* Validate.validState(this.isOk());</pre>
*
* <p>The message of the exception is "The validated state is
* false".</p>
*
* @param expression the boolean expression to check
* @throws IllegalStateException if expression is {@code false}
* @see #validState(boolean, String, Object...)
*
* @since 3.0
*/
public static void validState(final boolean expression) {
if (expression == false) {
throw new IllegalStateException(DEFAULT_VALID_STATE_EX_MESSAGE);
}
}
/**
* <p>Validate that the stateful condition is {@code true}; 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.validState(this.isOk(), "The state is not OK: %s", myObject);
*
* @param expression the boolean expression to check
* @param message the {@link String#format(String, Object...)} exception message if invalid, not null
* @param values the optional values for the formatted exception message, null array not recommended
* @throws IllegalStateException if expression is {@code false}
* @see #validState(boolean)
*
* @since 3.0
*/
public static void validState(final boolean expression, final String message, final Object... values) {
if (expression == false) {
throw new IllegalStateException(String.format(message, values));
}
}
// matchesPattern
//---------------------------------------------------------------------------------
/**
* <p>Validate that the specified argument character sequence matches the specified regular
* expression pattern; otherwise throwing an exception.</p>
*
* <pre>Validate.matchesPattern("hi", "[a-z]*");
*
* <p>The syntax of the pattern is the one used in the {@link Pattern} class.
*
* @param input the character sequence to validate, not null
* @param pattern the regular expression pattern, not null
* @throws IllegalArgumentException if the character sequence does not match the pattern
* @see #matchesPattern(CharSequence, String, String, Object...)
*
* @since 3.0
*/
public static void matchesPattern(final CharSequence input, final String pattern) {
// TODO when breaking BC, consider returning input
if (Pattern.matches(pattern, input) == false) {
throw new IllegalArgumentException(String.format(DEFAULT_MATCHES_PATTERN_EX, input, pattern));
}
}
/**
* <p>Validate that the specified argument character sequence matches the specified regular
* expression pattern; otherwise throwing an exception with the specified message.</p>
*
* <pre>Validate.matchesPattern("hi", "[a-z]*", "%s does not match %s", "hi" "[a-z]*");
*
* <p>The syntax of the pattern is the one used in the {@link Pattern} class.
*
* @param input the character sequence to validate, not null
* @param pattern the regular expression pattern, not null
* @param message the {@link String#format(String, Object...)} exception message if invalid, not null
* @param values the optional values for the formatted exception message, null array not recommended
* @throws IllegalArgumentException if the character sequence does not match the pattern
* @see #matchesPattern(CharSequence, String)
*
* @since 3.0
*/
public static void matchesPattern(final CharSequence input, final String pattern, final String message, final Object... values) {
// TODO when breaking BC, consider returning input
if (Pattern.matches(pattern, input) == false) {
throw new IllegalArgumentException(String.format(message, values));
}
}
// notNaN
//---------------------------------------------------------------------------------
/**
* <p>Validates that the specified argument is not {@code NaN}; otherwise
* throwing an exception.</p>
*
* <pre>Validate.notNaN(myDouble);
*
* <p>The message of the exception is "The validated value is not a
* number".</p>
*
* @param value the value to validate
* @throws IllegalArgumentException if the value is not a number
* @see #notNaN(double, java.lang.String, java.lang.Object...)
*
* @since 3.5
*/
public static void notNaN(final double value) {
notNaN(value, DEFAULT_NOT_NAN_EX_MESSAGE);
}
/**
* <p>Validates that the specified argument is not {@code NaN}; otherwise
* throwing an exception with the specified message.</p>
*
* <pre>Validate.notNaN(myDouble, "The value must be a number");
*
* @param value the value to validate
* @param message the {@link String#format(String, Object...)} exception message if invalid, not null
* @param values the optional values for the formatted exception message
* @throws IllegalArgumentException if the value is not a number
* @see #notNaN(double)
*
* @since 3.5
*/
public static void notNaN(final double value, final String message, final Object... values) {
if (Double.isNaN(value)) {
throw new IllegalArgumentException(String.format(message, values));
}
}
// finite
//---------------------------------------------------------------------------------
/**
* <p>Validates that the specified argument is not infinite or {@code NaN};
* otherwise throwing an exception.</p>
*
* <pre>Validate.finite(myDouble);
*
* <p>The message of the exception is "The value is invalid: %f".
*
* @param value the value to validate
* @throws IllegalArgumentException if the value is infinite or {@code NaN}
* @see #finite(double, java.lang.String, java.lang.Object...)
*
* @since 3.5
*/
public static void finite(final double value) {
finite(value, DEFAULT_FINITE_EX_MESSAGE, value);
}
/**
* <p>Validates that the specified argument is not infinite or {@code NaN};
* otherwise throwing an exception with the specified message.</p>
*
* <pre>Validate.finite(myDouble, "The argument must contain a numeric value");
*
* @param value the value to validate
* @param message the {@link String#format(String, Object...)} exception message if invalid, not null
* @param values the optional values for the formatted exception message
* @throws IllegalArgumentException if the value is infinite or {@code NaN}
* @see #finite(double)
*
* @since 3.5
*/
public static void finite(final double value, final String message, final Object... values) {
if (Double.isNaN(value) || Double.isInfinite(value)) {
throw new IllegalArgumentException(String.format(message, values));
}
}
// greater
//---------------------------------------------------------------------------------
/**
* <p>Validates that the specified argument is strictly greater than a given
* reference; otherwise throwing an exception.</p>
*
* <pre>Validate.greaterObj(myObject, refObject);
*
* <p>The message of the exception is "The value {@code value} is not
* greater than {@code min}".</p>
*
* @param <T> the type of the argument object
* @param value the object to validate
* @param min the reference value
* @throws IllegalArgumentException if {@code value} is smaller than or equal to {@code min}
* @see #greaterObj(java.lang.Comparable, java.lang.Object, java.lang.String, java.lang.Object...)
*
* @since 3.5
*/
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