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

Example 31 with ValueExpression

use of javax.el.ValueExpression in project jersey by jersey.

the class LinkELContextTest method testNestedExpression.

@Test
public void testNestedExpression() {
    System.out.println("Nested expression");
    ExpressionFactory factory = ExpressionFactory.newInstance();
    LinkELContext context = new LinkELContext(new OuterEntityBean(), null);
    ValueExpression expr = factory.createValueExpression(context, "${entity.inner.id}", String.class);
    Object value = expr.getValue(context);
    assertEquals(ID, value);
}

Example 32 with ValueExpression

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

the class ExpressionEvaluatorImpl method parseExpression.

public Expression parseExpression(String expression, Class expectedType, FunctionMapper fMapper) throws ELException {
    try {
        ELContextImpl ctx = new ELContextImpl(ELResolverImpl.DefaultResolver);
        if (fMapper != null) {
            ctx.setFunctionMapper(new FunctionMapperImpl(fMapper));
        }
        ValueExpression ve = this.factory.createValueExpression(ctx, expression, expectedType);
        return new ExpressionImpl(ve);
    } catch (javax.el.ELException e) {
        throw new ELParseException(e.getMessage());
    }
}

Example 33 with ValueExpression

use of javax.el.ValueExpression in project sling 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
	 */
public static Object proprietaryEvaluate(final String expression, final Class expectedType, final PageContext pageContext, final ProtectedFunctionMapper functionMap, final boolean escape) throws ELException {
    Object retValue;
    final ExpressionFactory exprFactory = JspFactory.getDefaultFactory().getJspApplicationContext(pageContext.getServletContext()).getExpressionFactory();
    if (SecurityUtil.isPackageProtectionEnabled()) {
        try {
            retValue = AccessController.doPrivileged(new PrivilegedExceptionAction() {

                public Object run() throws Exception {
                    ELContextImpl ctx = (ELContextImpl) pageContext.getELContext();
                    ctx.setFunctionMapper(new FunctionMapperImpl(functionMap));
                    ValueExpression ve = exprFactory.createValueExpression(ctx, expression, expectedType);
                    return ve.getValue(ctx);
                }
            });
        } catch (PrivilegedActionException ex) {
            Exception realEx = ex.getException();
            if (realEx instanceof ELException) {
                throw (ELException) realEx;
            } else {
                throw new ELException(realEx);
            }
        }
    } else {
        ELContextImpl ctx = (ELContextImpl) pageContext.getELContext();
        ctx.setFunctionMapper(new FunctionMapperImpl(functionMap));
        ValueExpression ve = exprFactory.createValueExpression(ctx, expression, expectedType);
        retValue = ve.getValue(ctx);
    }
    if (escape && retValue != null) {
        retValue = XmlEscape(retValue.toString());
    }
    return retValue;
}

Example 34 with ValueExpression

use of javax.el.ValueExpression in project oxCore by GluuFederation.

the class ValueExpressionAnalyzer method getValueReference.

public ValueReference getValueReference(ELContext elContext) {
    InterceptingResolver resolver = new InterceptingResolver(elContext.getELResolver());
    try {
        expression.setValue(decorateELContext(elContext, resolver), null);
    } catch (ELException ele) {
        return null;
    }
    ValueReference reference = resolver.getValueReference();
    if (reference != null) {
        Object base = reference.getBase();
        if (base instanceof CompositeComponentExpressionHolder) {
            ValueExpression ve = ((CompositeComponentExpressionHolder) base).getExpression((String) reference.getProperty());
            if (ve != null) {
                this.expression = ve;
                reference = getValueReference(elContext);
            }
        }
    }
    return reference;
}

Example 35 with ValueExpression

use of javax.el.ValueExpression in project oxCore by GluuFederation.

the class EnumConverter method getAsObjectImpl.

public Object getAsObjectImpl(FacesContext context, UIComponent comp, String value) throws ConverterException {
    ValueExpression expr = comp.getValueExpression("value");
    Class enumType = expr == null ? null : expr.getType(context.getELContext());
    if (enumType != null && enumType.isEnum()) {
        return Enum.valueOf(enumType, value);
    } else {
        for (Object child : comp.getChildren()) {
            if (child instanceof UIComponent) {
                UIComponent c = (UIComponent) child;
                expr = c.getValueExpression("value");
                Object val = expr == null ? null : expr.getValue(context.getELContext());
                if (val == null) {
                    throw new ConverterException("Cannot get items");
                }
                Class t = val.getClass();
                if (t.isArray() && t.getComponentType().isEnum()) {
                    return Enum.valueOf(t.getComponentType(), value);
                } else if (val instanceof Collection) {
                    Object firstItem = ((Collection) val).iterator().next();
                    if (firstItem instanceof Enum) {
                        t = ((Enum) firstItem).getDeclaringClass();
                    } else {
                        t = firstItem.getClass();
                    }
                    return Enum.valueOf(t, value);
                }
            }
        }
    }
    throw new ConverterException("Unable to find selectItems with enum values.");
}