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markt pushed a commit to branch master
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The following commit(s) were added to refs/heads/master by this push:
new 4aab46d Partial fix for BZ 65124. Only generate local out variable
when required
4aab46d is described below
commit 4aab46d425e26dd6448665c74f0956e01c9fa8fb
Author: Mark Thomas <[email protected]>
AuthorDate: Tue May 18 11:22:04 2021 +0100
Partial fix for BZ 65124. Only generate local out variable when required
https://bz.apache.org/bugzilla/show_bug.cgi?id=65124
---
java/org/apache/jasper/compiler/Generator.java | 8 ++++++--
webapps/docs/changelog.xml | 5 +++++
2 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/java/org/apache/jasper/compiler/Generator.java
b/java/org/apache/jasper/compiler/Generator.java
index 4c228e8..92ccaf6 100644
--- a/java/org/apache/jasper/compiler/Generator.java
+++ b/java/org/apache/jasper/compiler/Generator.java
@@ -1845,9 +1845,13 @@ class Generator {
// Initialize local variables used in this method.
if (!isTagFile) {
- out.printil("jakarta.servlet.jsp.PageContext pageContext =
_jspx_page_context;");
+ out.printil("final jakarta.servlet.jsp.PageContext
pageContext = _jspx_page_context;");
+ }
+ // Only need to define out if the tag has a non-empty body or
+ // uses <jsp:attribute>...</jsp:attribute> nodes
+ if (!n.hasEmptyBody() || n.getNamedAttributeNodes().size() >
0) {
+ out.printil("jakarta.servlet.jsp.JspWriter out =
_jspx_page_context.getOut();");
}
- out.printil("jakarta.servlet.jsp.JspWriter out =
_jspx_page_context.getOut();");
generateLocalVariables(out, n);
}
diff --git a/webapps/docs/changelog.xml b/webapps/docs/changelog.xml
index 20a366a..173e8cd 100644
--- a/webapps/docs/changelog.xml
+++ b/webapps/docs/changelog.xml
@@ -131,6 +131,11 @@
Refactor use of internal <code>ChildInfo</code> class to use compile
time type checking rather than run time type checking. (markt)
</scode>
+ <fix>
+ <bug>65124</bug>: Partial fix. When generating Java source code to call
+ a tag handler, only define the local variable <code>JspWriter
out</code>
+ when it is going to be used. (markt)
+ </fix>
</changelog>
</subsection>
</section>
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