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Optimize performance of produces condition checks

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wenqi.huang
2019-03-22 22:09:04 +08:00
committed by Rossen Stoyanchev
parent d4714847a0
commit d10174a3e9
3 changed files with 49 additions and 16 deletions
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15
spring-web/src/main/java/org/springframework/http/ReadOnlyHttpHeaders.java
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@@ -40,6 +40,9 @@ class ReadOnlyHttpHeaders extends HttpHeaders {
@Nullable
private MediaType cachedContentType;
@Nullable
private MediaType cachedAccept;
ReadOnlyHttpHeaders(HttpHeaders headers) {
super(headers.headers);
}
@@ -56,6 +59,18 @@ class ReadOnlyHttpHeaders extends HttpHeaders {
}
}
@Override
public List<MediaType> getAccept() {
if (this.cachedAccept != null) {
return this.cachedAccept;
}
else {
List<MediaType> accept = super.getAccept();
this.cachedAccept = accept;
return accept;
}
}
@Override
public List<String> get(Object key) {
List<String> values = this.headers.get(key);