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https://issues.apache.org/jira/browse/JEXL-442?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18004233#comment-18004233
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Xu Pengcheng commented on JEXL-442:
-----------------------------------
Here is my fix by customizing TemplateInterpreter and JexlContext
{code:java}
@Override
protected Object getVariable(Frame frame, LexicalScope block, ASTIdentifier
identifier) {
if (identifier.getSymbol() < 0) {
MyContext ctx = (MyContext) this.context;
String name = identifier.getName();
if (ctx.hasVariableValue(name)) {
return ctx.getVariableValue(name);
}
}
return super.getVariable(frame, block, identifier);
}{code}
MyContext is my customized JexlContext which hold the call frame stack, if the
symbol < 0, I will find it from the parent call frame.
> Global variables can't be found in template.
> --------------------------------------------
>
> Key: JEXL-442
> URL: https://issues.apache.org/jira/browse/JEXL-442
> Project: Commons JEXL
> Issue Type: Bug
> Reporter: Xu Pengcheng
> Priority: Major
>
> The following code throws an exception: JexlExample.main:24@3:1 variable 'x'
> is undefined
> {code:java}
> JexlBuilder jexlBuilder = new JexlBuilder();
> JexlEngine jexl = jexlBuilder.create();
> JexlContext context = new MapContext();
> String code = """
> var x = 'hello';
> function test() {
> return `${x}`
> }
> test();
> """;
> JexlScript script = jexl.createScript(code);
> Object result = script.execute(context);
> System.out.println("Expression Result: " + result);{code}
> but if I change to
> {code:java}
> return x; {code}
> which works.
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