content: /*
   * Copyright 1999-2023 Alibaba Group Holding Ltd.
   *
   * 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 com.alibaba.nacos.common.packagescan.util;
  
  import com.alibaba.nacos.common.utils.CollectionUtils;
  import com.alibaba.nacos.common.utils.StringUtils;
  
  import java.util.Collection;
  import java.util.Map;
  import java.util.function.Supplier;
  
  /**
   * Copy from https://github.com/spring-projects/spring-framework.git, with less modifications
   * Assertion utility class that assists in validating arguments.
   *
   * <p>Useful for identifying programmer errors early and clearly at runtime.
   * For example, if the contract of a public method states it does not
   * allow {@code null} arguments, {@code Assert} can be used to validate that
   * contract. Doing this clearly indicates a contract violation when it
   * occurs and protects the class's invariants.
   *
   * <p>Typically used to validate method arguments rather than configuration
   * properties, to check for cases that are usually programmer errors rather
   * than configuration errors. In contrast to configuration initialization
   * code, there is usually no point in falling back to defaults in such methods.
   * This class is similar to JUnit's assertion library. If an argument value is
   * deemed invalid, an {@link IllegalArgumentException} is thrown (typically).
   * For example:
   *
   * <pre class="code">
   * Assert.notNull(clazz, "The class must not be null");
   * Assert.isTrue(i &gt; 0, "The value must be greater than zero");</pre>
   *
   * <p>Mainly for internal use within the framework; for a more comprehensive suite
   * of assertion utilities consider {@code org.apache.commons.lang3.Validate} from
   * <a href="https://commons.apache.org/proper/commons-lang/">Apache Commons Lang</a>,
   * Google Guava's
   * <a href="https://github.com/google/guava/wiki/PreconditionsExplained">Preconditions</a>,
   * or similar third-party libraries.
   *
   * @author Keith Donald
   * @author Juergen Hoeller
   * @author Sam Brannen
   * @author Colin Sampaleanu
   * @author Rob Harrop
   * @since 1.1.2
   */
  public abstract class AbstractAssert {
  
      private AbstractAssert() {
      }
  
      /**
       * Assert a boolean expression, throwing an {@code IllegalStateException}
       * if the expression evaluates to {@code false}.
       * Call {@link #isTrue} if you wish to throw an {@code IllegalArgumentException}
       * on an assertion failure.
       * <pre class="code">Assert.state(id == null, "The id property must not already be initialized");</pre>
       *
       * @param expression a boolean expression
       * @param message    the exception message to use if the assertion fails
       * @throws IllegalStateException if {@code expression} is {@code false}
       */
      public static void state(boolean expression, String message) {
          if (!expression) {
              throw new IllegalStateException(message);
          }
      }
  
      /**
       * Assert a boolean expression, throwing an {@code IllegalStateException}
       * if the expression evaluates to {@code false}.
       * Call {@link #isTrue} if you wish to throw an {@code IllegalArgumentException}
       * on an assertion failure.
       * <pre class="code">
       * Assert.state(entity.getId() == null,
       *     () -&gt; "ID for entity " + entity.getName() + " must not already be initialized");
       * </pre>
       *
       * @param expression      a boolean expression
       * @param messageSupplier a supplier for the exception message to use if the
       *                        assertion fails
       * @throws IllegalStateException if {@code expression} is {@code false}
       * @since 5.0
       */
      public static void state(boolean expression, Supplier<String> messageSupplier) {
          if (!expression) {
              throw new IllegalStateException(nullSafeGet(messageSupplier));
          }
      }
  
      /**
       * Assert a boolean expression, throwing an {@code IllegalStateException}
       * if the expression evaluates to {@code false}.
       *
       * @deprecated as of 4.3.7, in favor of {@link #state(boolean, String)}
       */
      @Deprecated
      public static void state(boolean expression) {
          state(expression, "[Assertion failed] - this state invariant must be true");
      }
  
      /**
       * Assert a boolean expression, throwing an {@code IllegalArgumentException}
       * if the expression evaluates to {@code false}.
       * <pre class="code">Assert.isTrue(i &gt; 0, "The value must be greater than zero");</pre>
       *
       * @param expression a boolean expression
       * @param message    the exception message to use if the assertion fails
       * @throws IllegalArgumentException if {@code expression} is {@code false}
       */
      public static void isTrue(boolean expression, String message) {
          if (!expression) {
              throw new IllegalArgumentException(message);
          }
      }
  
      /**
       * Assert a boolean expression, throwing an {@code IllegalArgumentException}
       * if the expression evaluates to {@code false}.
       * <pre class="code">
       * Assert.isTrue(i &gt; 0, () -&gt; "The value '" + i + "' must be greater than zero");
       * </pre>
       *
       * @param expression      a boolean expression
       * @param messageSupplier a supplier for the exception message to use if the
       *                        assertion fails
       * @throws IllegalArgumentException if {@code expression} is {@code false}
       * @since 5.0
       */
      public static void isTrue(boolean expression, Supplier<String> messageSupplier) {
          if (!expression) {
              throw new IllegalArgumentException(nullSafeGet(messageSupplier));
          }
      }
  
      /**
       * Assert a boolean expression, throwing an {@code IllegalArgumentException}
       * if the expression evaluates to {@code false}.
       *
       * @deprecated as of 4.3.7, in favor of {@link #isTrue(boolean, String)}
       */
      @Deprecated
      public static void isTrue(boolean expression) {
          isTrue(expression, "[Assertion failed] - this expression must be true");
      }
  
      /**
       * Assert that an object is {@code null}.
       * <pre class="code">Assert.isNull(value, "The value must be null");</pre>
       *
       * @param object  the object to check
       * @param message the exception message to use if the assertion fails
       * @throws IllegalArgumentException if the object is not {@code null}
       */
      public static void isNull(Object object, String message) {
          if (object != null) {
              throw new IllegalArgumentException(message);
          }
      }
  
      /**
       * Assert that an object is {@code null}.
       * <pre class="code">
       * Assert.isNull(value, () -&gt; "The value '" + value + "' must be null");
       * </pre>
       *
       * @param object          the object to check
       * @param messageSupplier a supplier for the exception message to use if the
       *                        assertion fails
       * @throws IllegalArgumentException if the object is not {@code null}
       * @since 5.0
       */
      public static void isNull(Object object, Supplier<String> messageSupplier) {
          if (object != null) {
              throw new IllegalArgumentException(nullSafeGet(messageSupplier));
          }
      }
  
      /**
       * Assert that an object is {@code null}.
       *
       * @deprecated as of 4.3.7, in favor of {@link #isNull(Object, String)}
       */
      @Deprecated
      public static void isNull(Object object) {
          isNull(object, "[Assertion failed] - the object argument must be null");
      }
  
      /**
       * Assert that an object is not {@code null}.
       * <pre class="code">Assert.notNull(clazz, "The class must not be null");</pre>
       *
       * @param object  the object to check
       * @param message the exception message to use if the assertion fails
       * @throws IllegalArgumentException if the object is {@code null}
       */
      public static void notNull(Object object, String message) {
          if (object == null) {
              throw new IllegalArgumentException(message);
          }
      }
  
      /**
       * Assert that an object is not {@code null}.
       * <pre class="code">
       * Assert.notNull(entity.getId(),
       *     () -&gt; "ID for entity " + entity.getName() + " must not be null");
       * </pre>
       *
       * @param object          the object to check
       * @param messageSupplier a supplier for the exception message to use if the
       *                        assertion fails
       * @throws IllegalArgumentException if the object is {@code null}
       * @since 5.0
       */
      public static void notNull(Object object, Supplier<String> messageSupplier) {
          if (object == null) {
              throw new IllegalArgumentException(nullSafeGet(messageSupplier));
          }
      }
  
      /**
       * Assert that an object is not {@code null}.
       *
       * @deprecated as of 4.3.7, in favor of {@link #notNull(Object, String)}
       */
      @Deprecated
      public static void notNull(Object object) {
          notNull(object, "[Assertion failed] - this argument is required; it must not be null");
      }
  
      /**
       * Assert that the given String is not empty; that is,
       * it must not be {@code null} and not the empty String.
       * <pre class="code">Assert.hasLength(name, "Name must not be empty");</pre>
       *
       * @param text    the String to check
       * @param message the exception message to use if the assertion fails
       * @throws IllegalArgumentException if the text is empty
       */
      public static void hasLength(String text, String message) {
          if (!StringUtils.hasLength(text)) {
              throw new IllegalArgumentException(message);
          }
      }
  
      /**
       * Assert that the given String is not empty; that is,
       * it must not be {@code null} and not the empty String.
       * <pre class="code">
       * Assert.hasLength(account.getName(),
       *     () -&gt; "Name for account '" + account.getId() + "' must not be empty");
       * </pre>
       *
       * @param text            the String to check
       * @param messageSupplier a supplier for the exception message to use if the
       *                        assertion fails
       * @throws IllegalArgumentException if the text is empty
       * @since 5.0
       */
      public static void hasLength(String text, Supplier<String> messageSupplier) {
          if (!StringUtils.hasLength(text)) {
              throw new IllegalArgumentException(nullSafeGet(messageSupplier));
          }
      }
  
      /**
       * Assert that the given String is not empty; that is,
       * it must not be {@code null} and not the empty String.
       *
       * @deprecated as of 4.3.7, in favor of {@link #hasLength(String, String)}
       */
      @Deprecated
      public static void hasLength(String text) {
          hasLength(text,
                  "[Assertion failed] - this String argument must have length; it must not be null or empty");
      }
  
      /**
       * Assert that the given String contains valid text content; that is, it must not
       * be {@code null} and must contain at least one non-whitespace character.
       * <pre class="code">Assert.hasText(name, "'name' must not be empty");</pre>
       *
       * @param text    the String to check
       * @param message the exception message to use if the assertion fails
       * @throws IllegalArgumentException if the text does not contain valid text content
       */
      public static void hasText(String text, String message) {
          if (!StringUtils.hasText(text)) {
              throw new IllegalArgumentException(message);
          }
      }
  
      /**
       * Assert that the given String contains valid text content; that is, it must not
       * be {@code null} and must contain at least one non-whitespace character.
       * <pre class="code">
       * Assert.hasText(account.getName(),
       *     () -&gt; "Name for account '" + account.getId() + "' must not be empty");
       * </pre>
       *
       * @param text            the String to check
       * @param messageSupplier a supplier for the exception message to use if the
       *                        assertion fails
       * @throws IllegalArgumentException if the text does not contain valid text content
       * @since 5.0
       */
      public static void hasText(String text, Supplier<String> messageSupplier) {
          if (!StringUtils.hasText(text)) {
              throw new IllegalArgumentException(nullSafeGet(messageSupplier));
          }
      }
  
      /**
       * Assert that the given String contains valid text content; that is, it must not
       * be {@code null} and must contain at least one non-whitespace character.
       *
       * @deprecated as of 4.3.7, in favor of {@link #hasText(String, String)}
       */
      @Deprecated
      public static void hasText(String text) {
          hasText(text,
                  "[Assertion failed] - this String argument must have text; it must not be null, empty, or blank");
      }
  
      /**
       * Assert that the given text does not contain the given substring.
       * <pre class="code">
       * Assert.doesNotContain(name, forbidden, () -&gt; "Name must not contain '" + forbidden + "'");
       * </pre>
       *
       * @param textToSearch    the text to search
       * @param substring       the substring to find within the text
       * @param messageSupplier a supplier for the exception message to use if the
       *                        assertion fails
       * @throws IllegalArgumentException if the text contains the substring
       * @since 5.0
       */
      public static void doesNotContain(String textToSearch, String substring, Supplier<String> messageSupplier) {
          if (StringUtils.hasLength(textToSearch) && StringUtils.hasLength(substring)
                  && textToSearch.contains(substring)) {
              throw new IllegalArgumentException(nullSafeGet(messageSupplier));
          }
      }
  
      /**
       * Assert that the given text does not contain the given substring.
       *
       * @deprecated as of 4.3.7, in favor of {@link #doesNotContain(String, String, String)}
       */
      @Deprecated
      public static void doesNotContain(String textToSearch, String substring) {
          doesNotContain(textToSearch, substring,
                  () -> "[Assertion failed] - this String argument must not contain the substring [" + substring + "]");
      }
  
      /**
       * Assert that an array contains elements; that is, it must not be
       * {@code null} and must contain at least one element.
       * <pre class="code">Assert.notEmpty(array, "The array must contain elements");</pre>
       *
       * @param array   the array to check
       * @param message the exception message to use if the assertion fails
       * @throws IllegalArgumentException if the object array is {@code null} or contains no elements
       */
      public static void notEmpty(Object[] array, String message) {
          if (AbstractObjectUtils.isEmpty(array)) {
              throw new IllegalArgumentException(message);
          }
      }
  
      /**
       * Assert that an array contains elements; that is, it must not be
       * {@code null} and must contain at least one element.
       * <pre class="code">
       * Assert.notEmpty(array, () -&gt; "The " + arrayType + " array must contain elements");
       * </pre>
       *
       * @param array           the array to check
       * @param messageSupplier a supplier for the exception message to use if the
       *                        assertion fails
       * @throws IllegalArgumentException if the object array is {@code null} or contains no elements
       * @since 5.0
       */
      public static void notEmpty(Object[] array, Supplier<String> messageSupplier) {
          if (AbstractObjectUtils.isEmpty(array)) {
              throw new IllegalArgumentException(nullSafeGet(messageSupplier));
          }
      }
  
      /**
       * Assert that an array contains elements; that is, it must not be
       * {@code null} and must contain at least one element.
       *
       * @deprecated as of 4.3.7, in favor of {@link #notEmpty(Object[], String)}
       */
      @Deprecated
      public static void notEmpty(Object[] array) {
          notEmpty(array, "[Assertion failed] - this array must not be empty: it must contain at least 1 element");
      }
  
      /**
       * Assert that a collection contains elements; that is, it must not be
       * {@code null} and must contain at least one element.
       * <pre class="code">
       * Assert.notEmpty(collection, () -&gt; "The " + collectionType + " collection must contain elements");
       * </pre>
       *
       * @param collection      the collection to check
       * @param messageSupplier a supplier for the exception message to use if the
       *                        assertion fails
       * @throws IllegalArgumentException if the collection is {@code null} or
       *                                  contains no elements
       * @since 5.0
       */
      public static void notEmpty(Collection<?> collection, Supplier<String> messageSupplier) {
          if (CollectionUtils.isEmpty(collection)) {
              throw new IllegalArgumentException(nullSafeGet(messageSupplier));
          }
      }
  
      /**
       * Assert that a collection contains elements; that is, it must not be
       * {@code null} and must contain at least one element.
       * <pre class="code">Assert.notEmpty(collection, "Collection must contain elements");</pre>
       *
       * @param collection the collection to check
       * @param message    the exception message to use if the assertion fails
       * @throws IllegalArgumentException if the collection is {@code null} or
       *                                  contains no elements
       */
      public static void notEmpty(Collection<?> collection, String message) {
          if (CollectionUtils.isEmpty(collection)) {
              throw new IllegalArgumentException(message);
          }
      }
  
      /**
       * Assert that a collection contains elements; that is, it must not be
       * {@code null} and must contain at least one element.
       *
       * @deprecated as of 4.3.7, in favor of {@link #notEmpty(Collection, String)}
       */
      @Deprecated
      public static void notEmpty(Collection<?> collection) {
          notEmpty(collection,
                  "[Assertion failed] - this collection must not be empty: it must contain at least 1 element");
      }
  
      /**
       * Assert that a Map contains entries; that is, it must not be {@code null}
       * and must contain at least one entry.
       * <pre class="code">Assert.notEmpty(map, "Map must contain entries");</pre>
       *
       * @param map     the map to check
       * @param message the exception message to use if the assertion fails
       * @throws IllegalArgumentException if the map is {@code null} or contains no entries
       */
      public static void notEmpty(Map<?, ?> map, String message) {
          if (CollectionUtils.isMapEmpty(map)) {
              throw new IllegalArgumentException(message);
          }
      }
  
      /**
       * Assert that a Map contains entries; that is, it must not be {@code null}
       * and must contain at least one entry.
       * <pre class="code">
       * Assert.notEmpty(map, () -&gt; "The " + mapType + " map must contain entries");
       * </pre>
       *
       * @param map             the map to check
       * @param messageSupplier a supplier for the exception message to use if the
       *                        assertion fails
       * @throws IllegalArgumentException if the map is {@code null} or contains no entries
       * @since 5.0
       */
      public static void notEmpty(Map<?, ?> map, Supplier<String> messageSupplier) {
          if (CollectionUtils.isMapEmpty(map)) {
              throw new IllegalArgumentException(nullSafeGet(messageSupplier));
          }
      }
  
      /**
       * Assert that a Map contains entries; that is, it must not be {@code null}
       * and must contain at least one entry.
       *
       * @deprecated as of 4.3.7, in favor of {@link #notEmpty(Map, String)}
       */
      @Deprecated
      public static void notEmpty(Map<?, ?> map) {
          notEmpty(map, "[Assertion failed] - this map must not be empty; it must contain at least one entry");
      }
  
      /**
       * Assert that an array contains no {@code null} elements.
       * Note: Does not complain if the array is empty!
       * <pre class="code">Assert.noNullElements(array, "The array must contain non-null elements");</pre>
       *
       * @param array   the array to check
       * @param message the exception message to use if the assertion fails
       * @throws IllegalArgumentException if the object array contains a {@code null} element
       */
      public static void noNullElements(Object[] array, String message) {
          if (array != null) {
              for (Object element : array) {
                  if (element == null) {
                      throw new IllegalArgumentException(message);
                  }
              }
          }
      }
  
      /**
       * Assert that an array contains no {@code null} elements.
       * Note: Does not complain if the array is empty!
       * <pre class="code">
       * Assert.noNullElements(array, () -&gt; "The " + arrayType + " array must contain non-null elements");
       * </pre>
       *
       * @param array           the array to check
       * @param messageSupplier a supplier for the exception message to use if the
       *                        assertion fails
       * @throws IllegalArgumentException if the object array contains a {@code null} element
       * @since 5.0
       */
      public static void noNullElements(Object[] array, Supplier<String> messageSupplier) {
          if (array != null) {
              for (Object element : array) {
                  if (element == null) {
                      throw new IllegalArgumentException(nullSafeGet(messageSupplier));
                  }
              }
          }
      }
  
      /**
       * Assert that an array contains no {@code null} elements.
       *
       * @deprecated as of 4.3.7, in favor of {@link #noNullElements(Object[], String)}
       */
      @Deprecated
      public static void noNullElements(Object[] array) {
          noNullElements(array, "[Assertion failed] - this array must not contain any null elements");
      }
  
      /**
       * Assert that a collection contains no {@code null} elements.
       * Note: Does not complain if the collection is empty!
       * <pre class="code">Assert.noNullElements(collection, "Collection must contain non-null elements");</pre>
       *
       * @param collection the collection to check
       * @param message    the exception message to use if the assertion fails
       * @throws IllegalArgumentException if the collection contains a {@code null} element
       * @since 5.2
       */
      public static void noNullElements(Collection<?> collection, String message) {
          if (collection != null) {
              for (Object element : collection) {
                  if (element == null) {
                      throw new IllegalArgumentException(message);
                  }
              }
          }
      }
  
      /**
       * Assert that a collection contains no {@code null} elements.
       * Note: Does not complain if the collection is empty!
       * <pre class="code">
       * Assert.noNullElements(collection, () -&gt; "Collection " + collectionName + " must contain non-null elements");
       * </pre>
       *
       * @param collection      the collection to check
       * @param messageSupplier a supplier for the exception message to use if the
       *                        assertion fails
       * @throws IllegalArgumentException if the collection contains a {@code null} element
       * @since 5.2
       */
      public static void noNullElements(Collection<?> collection, Supplier<String> messageSupplier) {
          if (collection != null) {
              for (Object element : collection) {
                  if (element == null) {
                      throw new IllegalArgumentException(nullSafeGet(messageSupplier));
                  }
              }
          }
      }
  
      /**
       * Assert that the provided object is an instance of the provided class.
       * <pre class="code">Assert.instanceOf(Foo.class, foo, "Foo expected");</pre>
       *
       * @param type    the type to check against
       * @param obj     the object to check
       * @param message a message which will be prepended to provide further context.
       *                If it is empty or ends in ":" or ";" or "," or ".", a full exception message
       *                will be appended. If it ends in a space, the name of the offending object's
       *                type will be appended. In any other case, a ":" with a space and the name
       *                of the offending object's type will be appended.
       * @throws IllegalArgumentException if the object is not an instance of type
       */
      public static void isInstanceOf(Class<?> type, Object obj, String message) {
          notNull(type, "Type to check against must not be null");
          if (!type.isInstance(obj)) {
              instanceCheckFailed(type, obj, message);
          }
      }
  
      /**
       * Assert that the provided object is an instance of the provided class.
       * <pre class="code">
       * Assert.instanceOf(Foo.class, foo, () -&gt; "Processing " + Foo.class.getSimpleName() + ":");
       * </pre>
       *
       * @param type            the type to check against
       * @param obj             the object to check
       * @param messageSupplier a supplier for the exception message to use if the
       *                        assertion fails. See {@link #isInstanceOf(Class, Object, String)} for details.
       * @throws IllegalArgumentException if the object is not an instance of type
       * @since 5.0
       */
      public static void isInstanceOf(Class<?> type, Object obj, Supplier<String> messageSupplier) {
          notNull(type, "Type to check against must not be null");
          if (!type.isInstance(obj)) {
              instanceCheckFailed(type, obj, nullSafeGet(messageSupplier));
          }
      }
  
      /**
       * Assert that the provided object is an instance of the provided class.
       * <pre class="code">Assert.instanceOf(Foo.class, foo);</pre>
       *
       * @param type the type to check against
       * @param obj  the object to check
       * @throws IllegalArgumentException if the object is not an instance of type
       */
      public static void isInstanceOf(Class<?> type, Object obj) {
          isInstanceOf(type, obj, "");
      }
  
      /**
       * Assert that {@code superType.isAssignableFrom(subType)} is {@code true}.
       * <pre class="code">Assert.isAssignable(Number.class, myClass, "Number expected");</pre>
       *
       * @param superType the super type to check against
       * @param subType   the sub type to check
       * @param message   a message which will be prepended to provide further context.
       *                  If it is empty or ends in ":" or ";" or "," or ".", a full exception message
       *                  will be appended. If it ends in a space, the name of the offending sub type
       *                  will be appended. In any other case, a ":" with a space and the name of the
       *                  offending sub type will be appended.
       * @throws IllegalArgumentException if the classes are not assignable
       */
      public static void isAssignable(Class<?> superType, Class<?> subType, String message) {
          notNull(superType, "Super type to check against must not be null");
          if (subType == null || !superType.isAssignableFrom(subType)) {
              assignableCheckFailed(superType, subType, message);
          }
      }
  
      /**
       * Assert that {@code superType.isAssignableFrom(subType)} is {@code true}.
       * <pre class="code">
       * Assert.isAssignable(Number.class, myClass, () -&gt; "Processing " + myAttributeName + ":");
       * </pre>
       *
       * @param superType       the super type to check against
       * @param subType         the sub type to check
       * @param messageSupplier a supplier for the exception message to use if the
       *                        assertion fails. See {@link #isAssignable(Class, Class, String)} for details.
       * @throws IllegalArgumentException if the classes are not assignable
       * @since 5.0
       */
      public static void isAssignable(Class<?> superType, Class<?> subType, Supplier<String> messageSupplier) {
          notNull(superType, "Super type to check against must not be null");
          if (subType == null || !superType.isAssignableFrom(subType)) {
              assignableCheckFailed(superType, subType, nullSafeGet(messageSupplier));
          }
      }
  
      /**
       * Assert that {@code superType.isAssignableFrom(subType)} is {@code true}.
       * <pre class="code">Assert.isAssignable(Number.class, myClass);</pre>
       *
       * @param superType the super type to check
       * @param subType   the sub type to check
       * @throws IllegalArgumentException if the classes are not assignable
       */
      public static void isAssignable(Class<?> superType, Class<?> subType) {
          isAssignable(superType, subType, "");
      }
  
      private static void instanceCheckFailed(Class<?> type, Object obj, String msg) {
          String className = (obj != null ? obj.getClass().getName() : "null");
          String result = "";
          boolean defaultMessage = true;
          if (StringUtils.hasLength(msg)) {
              if (endsWithSeparator(msg)) {
                  result = msg + " ";
              } else {
                  result = messageWithTypeName(msg, className);
                  defaultMessage = false;
              }
          }
          if (defaultMessage) {
              result = result + ("Object of class [" + className + "] must be an instance of " + type);
          }
          throw new IllegalArgumentException(result);
      }
  
      private static void assignableCheckFailed(Class<?> superType, Class<?> subType, String msg) {
          String result = "";
          boolean defaultMessage = true;
          if (StringUtils.hasLength(msg)) {
              if (endsWithSeparator(msg)) {
                  result = msg + " ";
              } else {
                  result = messageWithTypeName(msg, subType);
                  defaultMessage = false;
              }
          }
          if (defaultMessage) {
              result = result + (subType + " is not assignable to " + superType);
          }
          throw new IllegalArgumentException(result);
      }
  
      private static boolean endsWithSeparator(String msg) {
          return (msg.endsWith(":") || msg.endsWith(";") || msg.endsWith(",") || msg.endsWith("."));
      }
  
      private static String messageWithTypeName(String msg, Object typeName) {
          return msg + (msg.endsWith(" ") ? "" : ": ") + typeName;
      }
  
      private static String nullSafeGet(Supplier<String> messageSupplier) {
          return (messageSupplier != null ? messageSupplier.get() : null);
      }
  
  }
  