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

Example 1 with Node

use of org.apache.el.parser.Node in project tomcat70 by apache.

the class MethodExpressionImpl method getMethodInfo.

/**
 * Evaluates the expression relative to the provided context, and returns
 * information about the actual referenced method.
 *
 * @param context
 *            The context of this evaluation
 * @return an instance of <code>MethodInfo</code> containing information
 *         about the method the expression evaluated to.
 * @throws NullPointerException
 *             if context is <code>null</code> or the base object is
 *             <code>null</code> on the last resolution.
 * @throws PropertyNotFoundException
 *             if one of the property resolutions failed because a specified
 *             variable or property does not exist or is not readable.
 * @throws MethodNotFoundException
 *             if no suitable method can be found.
 * @throws ELException
 *             if an exception was thrown while performing property or
 *             variable resolution. The thrown exception must be included as
 *             the cause property of this exception, if available.
 * @see javax.el.MethodExpression#getMethodInfo(javax.el.ELContext)
 */
@Override
public MethodInfo getMethodInfo(ELContext context) throws PropertyNotFoundException, MethodNotFoundException, ELException {
    Node n = this.getNode();
    EvaluationContext ctx = new EvaluationContext(context, this.fnMapper, this.varMapper);
    return n.getMethodInfo(ctx, this.paramTypes);
}

Example 2 with Node

use of org.apache.el.parser.Node in project tomcat70 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 = cache.get(expr);
    if (n == null) {
        try {
            n = (new ELParser(new StringReader(expr))).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);
            }
            cache.put(expr, n);
        } catch (Exception e) {
            throw new ELException(MessageFactory.get("error.parseFail", expr), e);
        }
    }
    return n;
}

Example 3 with Node

use of org.apache.el.parser.Node in project tomcat70 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;
}

Example 4 with Node

use of org.apache.el.parser.Node 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;
}

Example 5 with Node

use of org.apache.el.parser.Node 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;
}