Examples with ELContext javax.el.ELContext used on opensource projects

Example 26 with ELContext

use of javax.el.ELContext in project tomcat by apache.

the class PageContextImpl method proprietaryEvaluate.

/**
     * Proprietary method to evaluate EL expressions. XXX - This method should
     * go away once the EL interpreter moves out of JSTL and into its own
     * project. For now, this is necessary because the standard machinery is too
     * slow.
     *
     * @param expression
     *            The expression to be evaluated
     * @param expectedType
     *            The expected resulting type
     * @param pageContext
     *            The page context
     * @param functionMap
     *            Maps prefix and name to Method
     * @return The result of the evaluation
     * @throws ELException If an error occurs during the evaluation
     */
public static Object proprietaryEvaluate(final String expression, final Class<?> expectedType, final PageContext pageContext, final ProtectedFunctionMapper functionMap) throws ELException {
    final ExpressionFactory exprFactory = jspf.getJspApplicationContext(pageContext.getServletContext()).getExpressionFactory();
    ELContext ctx = pageContext.getELContext();
    ELContextImpl ctxImpl;
    if (ctx instanceof ELContextWrapper) {
        ctxImpl = (ELContextImpl) ((ELContextWrapper) ctx).getWrappedELContext();
    } else {
        ctxImpl = (ELContextImpl) ctx;
    }
    ctxImpl.setFunctionMapper(functionMap);
    ValueExpression ve = exprFactory.createValueExpression(ctx, expression, expectedType);
    return ve.getValue(ctx);
}

Example 27 with ELContext

use of javax.el.ELContext in project tomcat by apache.

the class TestScopedAttributeELResolverPerformance method testGetValuePerformance.

/*
     * With the caching of NotFound responses this test takes ~20ms. Without the
     * caching it takes ~6s.
     */
@Test
public void testGetValuePerformance() throws Exception {
    ELContext context = new StandardELContext(ELManager.getExpressionFactory());
    context.putContext(JspContext.class, new TesterPageContext());
    ELResolver resolver = new ScopedAttributeELResolver();
    for (int i = 0; i < 100000; i++) {
        resolver.getValue(context, null, "unknown");
    }
}

Example 28 with ELContext

use of javax.el.ELContext in project camel by apache.

the class JuelExpression method evaluate.

public <T> T evaluate(Exchange exchange, Class<T> tClass) {
    // Create (if needed) the ExpressionFactory first from the CamelContext using FactoryFinder
    ExpressionFactory factory = getExpressionFactory(exchange.getContext());
    ELContext context = populateContext(createContext(), exchange);
    ValueExpression valueExpression = factory.createValueExpression(context, expression, type);
    Object value = valueExpression.getValue(context);
    LOG.trace("Value returned {}", value);
    return exchange.getContext().getTypeConverter().convertTo(tClass, value);
}