Example usage for javax.servlet.jsp PageContext getExpressionEvaluator

Introduction

In this page you can find the example usage for javax.servlet.jsp PageContext getExpressionEvaluator.

Prototype

public abstract ExpressionEvaluator getExpressionEvaluator();

Source Link

Document

Provides programmatic access to the ExpressionEvaluator.

Usage

From source file:io.undertow.test.jsp.expression.ExpressionJspTestCase.java

public static void evaluate(JspWriter out, PageContext pc, String qualifiedMethodExpression,
        String unqualifiedMethodExpression, String variableExpression) throws Exception {
    assert pc != null;
    TSFunctionMapper mapper = new TSFunctionMapper();
    ExpressionEvaluator eval = pc.getExpressionEvaluator();
    VariableResolver resolver = pc.getVariableResolver();
    assert eval != null : "Unable to obtain ExpressionEvaluator";
    Expression expr = eval.parseExpression(qualifiedMethodExpression, java.lang.String.class, mapper);
    assert expr != null;
    String result = (String) expr.evaluate(resolver);
    if (result != null) {
        if (result.equals("string")) {
            Expression expr2 = eval.parseExpression(variableExpression, javax.servlet.jsp.PageContext.class,
                    null);//from   www  .  j  av  a  2  s . c  o  m
            if (expr2 != null) {
                PageContext pageContext = (PageContext) expr2.evaluate(resolver);
                if (pageContext != pc) {
                    out.println("Test FAILED.  Resolution didn't return expected value.");
                    out.println("PageContext returned is not the same instance as expected.");
                }
                Expression expr3 = eval.parseExpression(unqualifiedMethodExpression, java.lang.String.class,
                        mapper);
                if (expr3 != null) {
                    result = (String) expr3.evaluate(resolver);
                    if (result != null) {
                        if (result.equals("string")) {
                            out.println("Test PASSED");
                        } else {
                            out.println("Test FAILED. (l3) Expression evaluation returned unexpected value.");
                            out.println("Expected 'string', received '" + result + "'");
                        }
                    } else {
                        out.println("Test FAILED.  (l3) Expression evaluation returned null.");
                    }
                } else {
                    out.println("Test FAILED. (l3) ExpressionEvaluator.parseExpression" + " returned null.");
                }
            } else {
                out.println("Test FAILED. (l2) ExpressionEvaluator returned null.");
            }
        } else {
            out.println("Test FAILED.  (l1) Expression evaluation returned unexpected result.");
            out.println("Expected 'string', Received '" + result + "'");
        }
    } else {
        out.println("Test FAILED. (l1) Expression evaluation returned null.");
    }

}

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From source file:org.emonocot.portal.view.Functions.java

public static String evaluate(String expressionString, PageContext pageContext) throws ELException {
    return (String) pageContext.getExpressionEvaluator().evaluate(expressionString, String.class,
            pageContext.getVariableResolver(), null);
}

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