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

Author: sbrannen

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

@@ -54,7 +54,6 @@
 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 @@ SourceClass asSourceClass(@Nullable String className, Predicate<String> filter)
 				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 @@ private SourceClass getRelated(String className) throws IOException {
 				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

@@ -1,5 +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 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 URI getURI() throws IOException {
 			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/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.
@@ -22,7 +22,6 @@
 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 URL getURL() throws IOException {
 			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 URI getURI() throws IOException {
 			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/io/VfsResource.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.ObjectInputStream;
 
 import org.springframework.core.ConfigurableObjectInputStream;
-import org.springframework.core.NestedIOException;
 import org.springframework.lang.Nullable;
 
 /**
@@ -72,7 +71,7 @@ public Object deserialize(InputStream inputStream) throws IOException {
 			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/serializer/DefaultDeserializer.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.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 @@ private static ClassReader getClassReader(Resource resource) throws IOException
 				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);
 			}
 		}