use of org.apache.el.parser.AstDynamicExpression in project tomcat by apache.
the class ExpressionBuilder method createNodeInternal.
private static final Node createNodeInternal(String expr) throws ELException {
if (expr == null) {
throw new ELException(MessageFactory.get("error.null"));
}
Node n = expressionCache.get(expr);
if (n == null) {
ELParser parser = parserCache.pop();
try {
if (parser == null) {
parser = new ELParser(new StringReader(expr));
} else {
parser.ReInit(new StringReader(expr));
}
n = parser.CompositeExpression();
// validate composite expression
int numChildren = n.jjtGetNumChildren();
if (numChildren == 1) {
n = n.jjtGetChild(0);
} else {
Class<?> type = null;
Node child = null;
for (int i = 0; i < numChildren; i++) {
child = n.jjtGetChild(i);
if (child instanceof AstLiteralExpression)
continue;
if (type == null)
type = child.getClass();
else {
if (!type.equals(child.getClass())) {
throw new ELException(MessageFactory.get("error.mixed", expr));
}
}
}
}
if (n instanceof AstDeferredExpression || n instanceof AstDynamicExpression) {
n = n.jjtGetChild(0);
}
expressionCache.put(expr, n);
} catch (Exception e) {
throw new ELException(MessageFactory.get("error.parseFail", expr), e);
} finally {
if (parser != null) {
parserCache.push(parser);
}
}
}
return n;
}
use of org.apache.el.parser.AstDynamicExpression in project tomcat by apache.
the class ExpressionBuilder method build.
private Node build() throws ELException {
Node n = createNodeInternal(this.expression);
this.prepare(n);
if (n instanceof AstDeferredExpression || n instanceof AstDynamicExpression) {
n = n.jjtGetChild(0);
}
return n;
}
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