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Declare resolvedCharset as transient (restoring serializability)

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Closes gh-26127
This commit is contained in:
Juergen Hoeller
2020-11-20 18:40:10 +01:00
parent e6324bd578
commit 4fb5d59c64
4 changed files with 50 additions and 18 deletions
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29
spring-core/src/main/java/org/springframework/util/MimeType.java
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@@ -16,6 +16,8 @@
package org.springframework.util;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.Serializable;
import java.nio.charset.Charset;
import java.util.BitSet;
@@ -104,7 +106,7 @@ public class MimeType implements Comparable<MimeType>, Serializable {
private final Map<String, String> parameters;
@Nullable
private Charset resolvedCharset;
private transient Charset resolvedCharset;
@Nullable
private volatile String toStringValue;
@@ -184,9 +186,9 @@ public class MimeType implements Comparable<MimeType>, Serializable {
this.subtype = subtype.toLowerCase(Locale.ENGLISH);
if (!CollectionUtils.isEmpty(parameters)) {
Map<String, String> map = new LinkedCaseInsensitiveMap<>(parameters.size(), Locale.ENGLISH);
parameters.forEach((attribute, value) -> {
checkParameters(attribute, value);
map.put(attribute, value);
parameters.forEach((parameter, value) -> {
checkParameters(parameter, value);
map.put(parameter, value);
});
this.parameters = Collections.unmodifiableMap(map);
}
@@ -224,11 +226,11 @@ public class MimeType implements Comparable<MimeType>, Serializable {
}
}
protected void checkParameters(String attribute, String value) {
Assert.hasLength(attribute, "'attribute' must not be empty");
protected void checkParameters(String parameter, String value) {
Assert.hasLength(parameter, "'parameter' must not be empty");
Assert.hasLength(value, "'value' must not be empty");
checkToken(attribute);
if (PARAM_CHARSET.equals(attribute)) {
checkToken(parameter);
if (PARAM_CHARSET.equals(parameter)) {
if (this.resolvedCharset == null) {
this.resolvedCharset = Charset.forName(unquote(value));
}
@@ -591,6 +593,17 @@ public class MimeType implements Comparable<MimeType>, Serializable {
return 0;
}
private void readObject(ObjectInputStream ois) throws IOException, ClassNotFoundException {
// Rely on default serialization, just initialize state after deserialization.
ois.defaultReadObject();
// Initialize transient fields.
String charsetName = getParameter(PARAM_CHARSET);
if (charsetName != null) {
this.resolvedCharset = Charset.forName(unquote(charsetName));
}
}
/**
* Parse the given String value into a {@code MimeType} object,