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

Example 46 with ValueExpression

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

the class TestAttributeParser method evalAttr.

private String evalAttr(String expression, char quote) {
    ExpressionFactoryImpl exprFactory = new ExpressionFactoryImpl();
    ELContextImpl ctx = new ELContextImpl(exprFactory);
    ctx.setFunctionMapper(new TesterFunctions.FMapper());
    ValueExpression ve = exprFactory.createValueExpression(ctx, AttributeParser.getUnquoted(expression, quote, false, false, false, false), String.class);
    return (String) ve.getValue(ctx);
}

Example 47 with ValueExpression

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

the class TestELParser method doTestParser.

private void doTestParser(String input, String expectedResult, String expectedBuilderOutput) throws JasperException {
    ELException elException = null;
    String elResult = null;
    // Don't try and evaluate expressions that depend on variables or functions
    if (expectedResult != null) {
        try {
            ELManager manager = new ELManager();
            ELContext context = manager.getELContext();
            ExpressionFactory factory = ELManager.getExpressionFactory();
            ValueExpression ve = factory.createValueExpression(context, input, String.class);
            elResult = ve.getValue(context).toString();
            Assert.assertEquals(expectedResult, elResult);
        } catch (ELException ele) {
            elException = ele;
        }
    }
    Nodes nodes = null;
    try {
        nodes = ELParser.parse(input, false);
        Assert.assertNull(elException);
    } catch (IllegalArgumentException iae) {
        Assert.assertNotNull(elResult, elException);
        // Not strictly true but enables us to report both
        iae.initCause(elException);
        throw iae;
    }
    TextBuilder textBuilder = new TextBuilder(false);
    nodes.visit(textBuilder);
    Assert.assertEquals(expectedBuilderOutput, textBuilder.getText());
}

Example 48 with ValueExpression

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

the class TestAstSetData method testGetType.

@Test
public void testGetType() {
    ELProcessor processor = new ELProcessor();
    ELContext context = processor.getELManager().getELContext();
    ExpressionFactory factory = ELManager.getExpressionFactory();
    ValueExpression ve = factory.createValueExpression(context, "${{'a','b','c'}}", Set.class);
    Assert.assertEquals(Set.class, ve.getType(context));
    Assert.assertEquals(simpleSet, ve.getValue(context));
}

Example 49 with ValueExpression

use of javax.el.ValueExpression 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 50 with ValueExpression

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

the class AstIdentifier method getValueReference.

@Override
public ValueReference getValueReference(EvaluationContext ctx) {
    VariableMapper varMapper = ctx.getVariableMapper();
    if (varMapper == null) {
        return null;
    }
    ValueExpression expr = varMapper.resolveVariable(this.image);
    if (expr == null) {
        return null;
    }
    return expr.getValueReference(ctx);
}