blade.kit.Assert Maven / Gradle / Ivy
/**
* Copyright (c) 2015, biezhi 王爵 ([email protected])
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package blade.kit;
import java.util.Collection;
import java.util.Map;
/**
* 断言工具类
*
* @author biezhi
* @since 1.0
*
*/
public abstract class Assert {
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_IS_TRUE_EX_MESSAGE = "The validated expression is false";
private static final String DEFAULT_IS_FALSE_EX_MESSAGE = "The validated expression is true";
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_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";
public static void isTrue(boolean expression, String message) {
if (!expression) {
throw new IllegalArgumentException(message);
}
}
public static void notNull(Object object, String message) {
if (object == null) {
throw new NullPointerException(message);
}
}
public static void notNull(Object object) {
notNull(object, "[Assertion failed] - this argument is required; it must not be null");
}
public static T checkNotNull(T reference) {
if (reference == null) {
throw new NullPointerException();
}
return reference;
}
public static void checkPositionIndexes(int start, int end, int size) {
// Carefully optimized for execution by hotspot (explanatory comment
// above)
if (start < 0 || end < start || end > size) {
throw new IndexOutOfBoundsException(badPositionIndexes(start, end, size));
}
}
private static String badPositionIndexes(int start, int end, int size) {
if (start < 0 || start > size) {
return badPositionIndex(start, size, "start index");
}
if (end < 0 || end > size) {
return badPositionIndex(end, size, "end index");
}
// end < start
return format("end index (%s) must not be less than start index (%s)", end, start);
}
private static String badPositionIndex(int index, int size, String desc) {
if (index < 0) {
return format("%s (%s) must not be negative", desc, index);
} else if (size < 0) {
throw new IllegalArgumentException("negative size: " + size);
} else { // index > size
return format("%s (%s) must not be greater than size (%s)", desc, index, size);
}
}
/**
* Substitutes each {@code %s} in {@code template} with an argument. These are matched by
* position: the first {@code %s} gets {@code args[0]}, etc. If there are more arguments than
* placeholders, the unmatched arguments will be appended to the end of the formatted message in
* square braces.
*
* @param template a non-null string containing 0 or more {@code %s} placeholders.
* @param args the arguments to be substituted into the message template. Arguments are converted
* to strings using {@link String#valueOf(Object)}. Arguments can be null.
*/
// Note that this is somewhat-improperly used from Verify.java as well.
static String format(String template, Object... args) {
template = String.valueOf(template); // null -> "null"
// start substituting the arguments into the '%s' placeholders
StringBuilder builder = new StringBuilder(template.length() + 16 * args.length);
int templateStart = 0;
int i = 0;
while (i < args.length) {
int placeholderStart = template.indexOf("%s", templateStart);
if (placeholderStart == -1) {
break;
}
builder.append(template.substring(templateStart, placeholderStart));
builder.append(args[i++]);
templateStart = placeholderStart + 2;
}
builder.append(template.substring(templateStart));
// if we run out of placeholders, append the extra args in square braces
if (i < args.length) {
builder.append(" [");
builder.append(args[i++]);
while (i < args.length) {
builder.append(", ");
builder.append(args[i++]);
}
builder.append(']');
}
return builder.toString();
}
public static void hasLength(String text, String message) {
if (StringKit.isEmpty(text)) {
throw new IllegalArgumentException(message);
}
}
public static void state(boolean expression, String message) {
if (!expression) {
throw new IllegalStateException(message);
}
}
public static void isTrue(boolean expression) {
if (expression == false) {
throw new IllegalArgumentException(DEFAULT_IS_TRUE_EX_MESSAGE);
}
}
public static void isTrue(boolean expression, String message, Object... values) {
if (expression == false) {
throw new IllegalArgumentException(String.format(message, values));
}
}
public static void isFalse(boolean expression) {
if (expression) {
throw new IllegalArgumentException(DEFAULT_IS_FALSE_EX_MESSAGE);
}
}
public static void isFalse(boolean expression, String message, Object... values) {
if (expression) {
throw new IllegalArgumentException(String.format(message, values));
}
}
public static void notNull(Object object, String message, Object... values) {
if (object == null) {
throw new NullPointerException(String.format(message, values));
}
}
public static void notEmpty(Object[] array) {
if (array == null) {
throw new NullPointerException(DEFAULT_NOT_EMPTY_ARRAY_EX_MESSAGE);
}
if (array.length == 0) {
throw new IllegalArgumentException(DEFAULT_NOT_EMPTY_ARRAY_EX_MESSAGE);
}
}
public static void notEmpty(Object[] array, String message, Object... values) {
if (array == null) {
throw new NullPointerException(String.format(message, values));
}
if (array.length == 0) {
throw new IllegalArgumentException(String.format(message, values));
}
}
public static void notEmpty(Collection collection) {
if (collection == null) {
throw new NullPointerException(DEFAULT_NOT_EMPTY_COLLECTION_EX_MESSAGE);
}
if (collection.size() == 0) {
throw new IllegalArgumentException(DEFAULT_NOT_EMPTY_COLLECTION_EX_MESSAGE);
}
}
public static void notEmpty(Collection collection, String message, Object... values) {
if (collection == null) {
throw new NullPointerException(String.format(message, values));
}
if (collection.size() == 0) {
throw new IllegalArgumentException(String.format(message, values));
}
}
public static void notEmpty(Map map) {
if (map == null) {
throw new NullPointerException(DEFAULT_NOT_EMPTY_MAP_EX_MESSAGE);
}
if (map.size() == 0) {
throw new IllegalArgumentException(DEFAULT_NOT_EMPTY_MAP_EX_MESSAGE);
}
}
public static void notEmpty(Map map, String message, Object... values) {
if (map == null) {
throw new NullPointerException(String.format(message, values));
}
if (map.size() == 0) {
throw new IllegalArgumentException(String.format(message, values));
}
}
public static void notEmpty(CharSequence str) {
if (str == null) {
throw new NullPointerException(DEFAULT_NOT_EMPTY_CHAR_SEQUENCE_EX_MESSAGE);
}
if (str.length() == 0) {
throw new IllegalArgumentException(DEFAULT_NOT_EMPTY_CHAR_SEQUENCE_EX_MESSAGE);
}
}
public static void notEmpty(CharSequence str, String message, Object... values) {
if (str == null) {
throw new NullPointerException(String.format(message, values));
}
if (str.length() == 0) {
throw new IllegalArgumentException(String.format(message, values));
}
}
public static void notBlank(CharSequence str) {
if (str == null) {
throw new NullPointerException(DEFAULT_NOT_BLANK_EX_MESSAGE);
}
if (str.toString().trim().length() == 0) {
throw new IllegalArgumentException(DEFAULT_NOT_BLANK_EX_MESSAGE);
}
}
public static void notBlank(CharSequence str, String message, Object... values) {
if (str == null) {
throw new NullPointerException(String.format(message, values));
}
if (str.toString().trim().length() == 0) {
throw new IllegalArgumentException(String.format(message, values));
}
}
public static void inclusiveBetween(final T start, final T end, final Comparable value) {
if (value.compareTo(start) < 0 || value.compareTo(end) > 0) {
throw new IllegalArgumentException(String.format(DEFAULT_INCLUSIVE_BETWEEN_EX_MESSAGE, value, start, end));
}
}
public static void inclusiveBetween(final T start, final T end, final Comparable value, final String message, final Object... values) {
if (value.compareTo(start) < 0 || value.compareTo(end) > 0) {
throw new IllegalArgumentException(String.format(message, values));
}
}
public static void inclusiveBetween(long start, long end, long value) {
if (value < start || value > end) {
throw new IllegalArgumentException(String.format(DEFAULT_INCLUSIVE_BETWEEN_EX_MESSAGE, value, start, end));
}
}
public static void inclusiveBetween(long start, long end, long value, final String message, final Object... values) {
if (value < start || value > end) {
throw new IllegalArgumentException(String.format(message, values));
}
}
public static void inclusiveBetween(double start, double end, double value) {
if (value < start || value > end) {
throw new IllegalArgumentException(String.format(DEFAULT_INCLUSIVE_BETWEEN_EX_MESSAGE, value, start, end));
}
}
public static void inclusiveBetween(double start, double end, double value, final String message, final Object... values) {
if (value < start || value > end) {
throw new IllegalArgumentException(String.format(message, values));
}
}
public static void exclusiveBetween(final T start, final T end, final Comparable value) {
if (value.compareTo(start) <= 0 || value.compareTo(end) >= 0) {
throw new IllegalArgumentException(String.format(DEFAULT_EXCLUSIVE_BETWEEN_EX_MESSAGE, value, start, end));
}
}
public static void exclusiveBetween(final T start, final T end, final Comparable value, final String message, final Object... values) {
if (value.compareTo(start) <= 0 || value.compareTo(end) >= 0) {
throw new IllegalArgumentException(String.format(message, values));
}
}
public static void exclusiveBetween(long start, long end, long value) {
if (value <= start || value >= end) {
throw new IllegalArgumentException(String.format(DEFAULT_EXCLUSIVE_BETWEEN_EX_MESSAGE, value, start, end));
}
}
public static void exclusiveBetween(long start, long end, long value, final String message, final Object... values) {
if (value <= start || value >= end) {
throw new IllegalArgumentException(String.format(message, values));
}
}
public static void exclusiveBetween(double start, double end, double value) {
if (value <= start || value >= end) {
throw new IllegalArgumentException(String.format(DEFAULT_EXCLUSIVE_BETWEEN_EX_MESSAGE, value, start, end));
}
}
public static void exclusiveBetween(double start, double end, double value, final String message, final Object... values) {
if (value <= start || value >= end) {
throw new IllegalArgumentException(String.format(message, values));
}
}
public static void isInstanceOf(Class type, Object obj) {
if (type.isInstance(obj) == false) {
throw new IllegalArgumentException(String.format(DEFAULT_IS_INSTANCE_OF_EX_MESSAGE, type.getName(), obj == null ? "null" : obj.getClass().getName()));
}
}
public static void isInstanceOf(Class type, Object obj, String message, Object... values) {
if (type.isInstance(obj) == false) {
throw new IllegalArgumentException(String.format(message, values));
}
}
public static void isAssignableFrom(Class superType, Class type) {
if (superType.isAssignableFrom(type) == false) {
throw new IllegalArgumentException(String.format(DEFAULT_IS_ASSIGNABLE_EX_MESSAGE, type == null ? "null" : type.getName(), superType.getName()));
}
}
public static void isAssignableFrom(Class superType, Class type, String message, Object... values) {
if (superType.isAssignableFrom(type) == false) {
throw new IllegalArgumentException(String.format(message, values));
}
}
}
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