Remove obsolete org.springframework.core.NestedIOException

This commit removes Spring's custom NestedIOException and replaces its
usage with the standard IOException which has supported a root cause
since Java 6.

Closes gh-28198

spring-context/src/main/java/org/springframework/context/annotation/ConfigurationClassParser.java

@@ -54,7 +54,6 @@ import org.springframework.beans.factory.support.BeanDefinitionRegistry;
 import org.springframework.beans.factory.support.BeanNameGenerator;
 import org.springframework.context.annotation.ConfigurationCondition.ConfigurationPhase;
 import org.springframework.context.annotation.DeferredImportSelector.Group;
-import org.springframework.core.NestedIOException;
 import org.springframework.core.OrderComparator;
 import org.springframework.core.Ordered;
 import org.springframework.core.annotation.AnnotationAttributes;
@@ -690,7 +689,7 @@ class ConfigurationClassParser {
 				return new SourceClass(ClassUtils.forName(className, this.resourceLoader.getClassLoader()));
 			}
 			catch (ClassNotFoundException ex) {
-				throw new NestedIOException("Failed to load class [" + className + "]", ex);
+				throw new IOException("Failed to load class [" + className + "]", ex);
 			}
 		}
 		return new SourceClass(this.metadataReaderFactory.getMetadataReader(className));
@@ -1079,7 +1078,7 @@ class ConfigurationClassParser {
 				catch (ClassNotFoundException ex) {
 					// Ignore -> fall back to ASM next, except for core java types.
 					if (className.startsWith("java")) {
-						throw new NestedIOException("Failed to load class [" + className + "]", ex);
+						throw new IOException("Failed to load class [" + className + "]", ex);
 					}
 					return new SourceClass(metadataReaderFactory.getMetadataReader(className));
 				}

spring-core/src/main/java/org/springframework/core/NestedIOException.java

@@ -1,80 +0,0 @@
-/*
- * Copyright 2002-2022 the original author or authors.
- *
- * 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
- *
- *      https://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.springframework.core;
-
-import java.io.IOException;
-
-import org.springframework.lang.Nullable;
-
-/**
- * Subclass of {@link IOException} that properly handles a root cause,
- * exposing the root cause just like NestedChecked/RuntimeException does.
- *
- * <p>Proper root cause handling was added to the standard {@code IOException} in
- * Java 6, which is why Spring originally introduced {@code NestedIOException}
- * for compatibility with versions prior to Java 6.
- *
- * <p>The similarity between this class and the NestedChecked/RuntimeException
- * class is unavoidable, as this class needs to derive from IOException.
- *
- * @author Juergen Hoeller
- * @since 2.0
- * @see #getMessage
- * @see #printStackTrace
- * @see org.springframework.core.NestedCheckedException
- * @see org.springframework.core.NestedRuntimeException
- */
-@SuppressWarnings("serial")
-public class NestedIOException extends IOException {
-
-	static {
-		// Eagerly load the NestedExceptionUtils class to avoid classloader deadlock
-		// issues on OSGi when calling getMessage(). Reported by Don Brown; SPR-5607.
-		NestedExceptionUtils.class.getName();
-	}
-
-
-	/**
-	 * Construct a {@code NestedIOException} with the specified detail message.
-	 * @param msg the detail message
-	 */
-	public NestedIOException(String msg) {
-		super(msg);
-	}
-
-	/**
-	 * Construct a {@code NestedIOException} with the specified detail message
-	 * and nested exception.
-	 * @param msg the detail message
-	 * @param cause the nested exception
-	 */
-	public NestedIOException(@Nullable String msg, @Nullable Throwable cause) {
-		super(msg, cause);
-	}
-
-
-	/**
-	 * Return the detail message, including the message from the nested exception
-	 * if there is one.
-	 */
-	@Override
-	@Nullable
-	public String getMessage() {
-		return NestedExceptionUtils.buildMessage(super.getMessage(), getCause());
-	}
-
-}

spring-core/src/main/java/org/springframework/core/io/AbstractResource.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -30,7 +30,6 @@ import java.util.function.Supplier;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 
-import org.springframework.core.NestedIOException;
 import org.springframework.lang.Nullable;
 import org.springframework.util.ResourceUtils;
 
@@ -120,7 +119,7 @@ public abstract class AbstractResource implements Resource {
 			return ResourceUtils.toURI(url);
 		}
 		catch (URISyntaxException ex) {
-			throw new NestedIOException("Invalid URI [" + url + "]", ex);
+			throw new IOException("Invalid URI [" + url + "]", ex);
 		}
 	}
 

spring-core/src/main/java/org/springframework/core/io/VfsResource.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,7 +22,6 @@ import java.io.InputStream;
 import java.net.URI;
 import java.net.URL;
 
-import org.springframework.core.NestedIOException;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 
@@ -76,7 +75,7 @@ public class VfsResource extends AbstractResource {
 			return VfsUtils.getURL(this.resource);
 		}
 		catch (Exception ex) {
-			throw new NestedIOException("Failed to obtain URL for file " + this.resource, ex);
+			throw new IOException("Failed to obtain URL for file " + this.resource, ex);
 		}
 	}
 
@@ -86,7 +85,7 @@ public class VfsResource extends AbstractResource {
 			return VfsUtils.getURI(this.resource);
 		}
 		catch (Exception ex) {
-			throw new NestedIOException("Failed to obtain URI for " + this.resource, ex);
+			throw new IOException("Failed to obtain URI for " + this.resource, ex);
 		}
 	}
 

spring-core/src/main/java/org/springframework/core/serializer/DefaultDeserializer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,7 +21,6 @@ import java.io.InputStream;
 import java.io.ObjectInputStream;
 
 import org.springframework.core.ConfigurableObjectInputStream;
-import org.springframework.core.NestedIOException;
 import org.springframework.lang.Nullable;
 
 /**
@@ -72,7 +71,7 @@ public class DefaultDeserializer implements Deserializer<Object> {
 			return objectInputStream.readObject();
 		}
 		catch (ClassNotFoundException ex) {
-			throw new NestedIOException("Failed to deserialize object type", ex);
+			throw new IOException("Failed to deserialize object type", ex);
 		}
 	}
 

spring-core/src/main/java/org/springframework/core/type/classreading/SimpleMetadataReader.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,7 +20,6 @@ import java.io.IOException;
 import java.io.InputStream;
 
 import org.springframework.asm.ClassReader;
-import org.springframework.core.NestedIOException;
 import org.springframework.core.io.Resource;
 import org.springframework.core.type.AnnotationMetadata;
 import org.springframework.core.type.ClassMetadata;
@@ -57,7 +56,7 @@ final class SimpleMetadataReader implements MetadataReader {
 				return new ClassReader(is);
 			}
 			catch (IllegalArgumentException ex) {
-				throw new NestedIOException("ASM ClassReader failed to parse class file - " +
+				throw new IOException("ASM ClassReader failed to parse class file - " +
 						"probably due to a new Java class file version that isn't supported yet: " + resource, ex);
 			}
 		}