/*
* (non-Javadoc)
*
* @see com.sun.el.parser.NodeVisitor#visit(com.sun.el.parser.Node)
*/
public void visit(Node node) throws ELException {
if (node instanceof AstFunction) {
AstFunction funcNode = (AstFunction) node;
if (this.fnMapper == null) {
throw new ELException(MessageFactory.get("error.fnMapper.null"));
}
Method m = fnMapper.resolveFunction(funcNode.getPrefix(), funcNode.getLocalName());
if (m == null) {
throw new ELException(
MessageFactory.get("error.fnMapper.method", funcNode.getOutputName()));
}
int pcnt = m.getParameterTypes().length;
if (node.jjtGetNumChildren() != pcnt) {
throw new ELException(
MessageFactory.get(
"error.fnMapper.paramcount",
funcNode.getOutputName(),
"" + pcnt,
"" + node.jjtGetNumChildren()));
}
} else if (node instanceof AstIdentifier && this.varMapper != null) {
String variable = ((AstIdentifier) node).getImage();
// simply capture it
this.varMapper.resolveVariable(variable);
}
}
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;
}
private void prepare(Node node) throws ELException {
node.accept(this);
if (this.fnMapper instanceof FunctionMapperFactory) {
this.fnMapper = ((FunctionMapperFactory) this.fnMapper).create();
}
if (this.varMapper instanceof VariableMapperFactory) {
this.varMapper = ((VariableMapperFactory) this.varMapper).create();
}
}
private static final Node createNodeInternal(String expr) throws ELException {
if (expr == null) {
throw new ELException(MessageFactory.get("error.null"));
}
Node n = (Node) cache.get(expr);
if (n == null && (n = (Node) cache2.get(expr)) == null) {
try {
n = (new ELParser(new StringReader(expr))).CompositeExpression();
// validate composite expression
if (n instanceof AstCompositeExpression) {
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);
}
if (cache.size() > SIZE) {
cache2.clear();
cache2.putAll(cache);
cache.clear();
}
cache.put(expr, n);
} catch (ParseException pe) {
throw new ELException("Error Parsing: " + expr, pe);
}
}
return n;
}