Examples with AstFunction org.apache.el.parser.AstFunction used on opensource projects

Example 1 with AstFunction

use of org.apache.el.parser.AstFunction in project tomcat by apache.

the class ExpressionBuilder method visit.

/*
     * (non-Javadoc)
     *
     * @see com.sun.el.parser.NodeVisitor#visit(com.sun.el.parser.Node)
     */
@Override
public void visit(Node node) throws ELException {
    if (node instanceof AstFunction) {
        AstFunction funcNode = (AstFunction) node;
        Method m = null;
        if (this.fnMapper != null) {
            m = fnMapper.resolveFunction(funcNode.getPrefix(), funcNode.getLocalName());
        }
        // need to treat it as a variable rather than a function.
        if (m == null && this.varMapper != null && funcNode.getPrefix().length() == 0) {
            this.varMapper.resolveVariable(funcNode.getLocalName());
            return;
        }
        if (this.fnMapper == null) {
            throw new ELException(MessageFactory.get("error.fnMapper.null"));
        }
        if (m == null) {
            throw new ELException(MessageFactory.get("error.fnMapper.method", funcNode.getOutputName()));
        }
        int methodParameterCount = m.getParameterTypes().length;
        // AstFunction->MethodParameters->Parameters()
        int inputParameterCount = node.jjtGetChild(0).jjtGetNumChildren();
        if (m.isVarArgs() && inputParameterCount < methodParameterCount - 1 || !m.isVarArgs() && inputParameterCount != methodParameterCount) {
            throw new ELException(MessageFactory.get("error.fnMapper.paramcount", funcNode.getOutputName(), "" + methodParameterCount, "" + node.jjtGetChild(0).jjtGetNumChildren()));
        }
    } else if (node instanceof AstIdentifier && this.varMapper != null) {
        String variable = ((AstIdentifier) node).getImage();
        // simply capture it
        this.varMapper.resolveVariable(variable);
    }
}