Method getValue

java/org/apache/el/parser/AstFunction.java:76–195

(EvaluationContext ctx)

    }

    @Override
    public Object getValue(EvaluationContext ctx) throws ELException {

        FunctionMapper fnMapper = ctx.getFunctionMapper();

        // quickly validate again for this request
        if (fnMapper == null) {
            throw new ELException(MessageFactory.get("error.fnMapper.null"));
        }
        Method m = fnMapper.resolveFunction(this.prefix, this.localName);

        if (m == null && this.prefix.isEmpty()) {
            // TODO: Do we need to think about precedence of the various ways
            // a lambda expression may be obtained from something that
            // the parser thinks is a function?
            Object obj = null;
            if (ctx.isLambdaArgument(this.localName)) {
                obj = ctx.getLambdaArgument(this.localName);
            }
            if (obj == null) {
                VariableMapper varMapper = ctx.getVariableMapper();
                if (varMapper != null) {
                    obj = varMapper.resolveVariable(this.localName);
                    if (obj != null) {
                        // See if this returns a LambdaExpression
                        obj = ((ValueExpression) obj).getValue(ctx);
                    }
                }
            }
            if (obj == null) {
                obj = ctx.getELResolver().getValue(ctx, null, this.localName);
            }
            if (obj instanceof LambdaExpression) {
                // Build arguments
                int i = 0;
                while (obj instanceof LambdaExpression && i < jjtGetNumChildren()) {
                    Node args = jjtGetChild(i);
                    obj = ((LambdaExpression) obj).invoke(((AstMethodParameters) args).getParameters(ctx));
                    i++;
                }
                if (i < jjtGetNumChildren()) {
                    // Haven't consumed all the sets of parameters therefore
                    // there were too many sets of parameters
                    throw new ELException(MessageFactory.get("error.lambda.tooManyMethodParameterSets"));
                }
                return obj;
            }

            // Call to a constructor or a static method
            obj = ctx.getImportHandler().resolveClass(this.localName);
            if (obj != null) {
                return ctx.getELResolver().invoke(ctx, new ELClass((Class<?>) obj), "<init>", null,
                        ((AstMethodParameters) this.children[0]).getParameters(ctx));
            }
            obj = ctx.getImportHandler().resolveStatic(this.localName);
            if (obj != null) {
                return ctx.getELResolver().invoke(ctx, new ELClass((Class<?>) obj), this.localName, null,
                        ((AstMethodParameters) this.children[0]).getParameters(ctx));