/*
* (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);
}
}
@SuppressWarnings({"rawtypes", "unchecked"})
private Optional compare(boolean isMax) {
Comparable result = null;
if (iterator.hasNext()) {
Object obj = iterator.next();
if ((obj instanceof Comparable)) {
result = (Comparable) obj;
} else {
throw new ELException(MessageFactory.get("stream.compare.notComparable"));
}
}
while (iterator.hasNext()) {
Object obj = iterator.next();
if ((obj instanceof Comparable)) {
if (isMax && ((Comparable) obj).compareTo(result) > 0) {
result = (Comparable) obj;
} else if (!isMax && ((Comparable) obj).compareTo(result) < 0) {
result = (Comparable) obj;
}
} else {
throw new ELException(MessageFactory.get("stream.compare.notComparable"));
}
}
if (result == null) {
return Optional.EMPTY;
} else {
return new Optional(result);
}
}
@Override
public void setImage(String image) {
if (!Validation.isIdentifier(image)) {
throw new ELException(MessageFactory.get("error.identifier.notjava", image));
}
this.image = image;
}
private static final Node createNodeInternal(String expr) throws ELException {
if (expr == null) {
throw new ELException(MessageFactory.get("error.null"));
}
Node n = cache.get(expr);
if (n == 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);
}
cache.put(expr, n);
} catch (ParseException pe) {
throw new ELException("Error Parsing: " + expr, pe);
}
}
return n;
}
@Override
public void setValue(EvaluationContext ctx, Object value) throws ELException {
VariableMapper varMapper = ctx.getVariableMapper();
if (varMapper != null) {
ValueExpression expr = varMapper.resolveVariable(this.image);
if (expr != null) {
expr.setValue(ctx.getELContext(), value);
return;
}
}
ctx.setPropertyResolved(false);
ctx.getELResolver().setValue(ctx, null, this.image, value);
if (!ctx.isPropertyResolved()) {
throw new PropertyNotFoundException(
MessageFactory.get("error.resolver.unhandled.null", this.image));
}
}
@Override
public boolean isReadOnly(EvaluationContext ctx) throws ELException {
VariableMapper varMapper = ctx.getVariableMapper();
if (varMapper != null) {
ValueExpression expr = varMapper.resolveVariable(this.image);
if (expr != null) {
return expr.isReadOnly(ctx.getELContext());
}
}
ctx.setPropertyResolved(false);
boolean result = ctx.getELResolver().isReadOnly(ctx, null, this.image);
if (!ctx.isPropertyResolved()) {
throw new PropertyNotFoundException(
MessageFactory.get("error.resolver.unhandled.null", this.image));
}
return result;
}
protected final Number coerce(final Object obj) {
if (isNumber(obj)) {
return coerce((Number) obj);
}
if (obj instanceof String) {
return coerce((String) obj);
}
if (obj == null || "".equals(obj)) {
return coerce(ZERO);
}
if (obj instanceof Character) {
return coerce(Short.valueOf((short) ((Character) obj).charValue()));
}
throw new IllegalArgumentException(
MessageFactory.get("error.convert", obj, obj.getClass(), "Number"));
}
@Override
public void setValue(ELContext context, Object value) {
throw new PropertyNotWritableException(
MessageFactory.get("error.value.literal.write", this.value));
}
