Example usage for javax.el ExpressionFactory createValueExpression

Introduction

In this page you can find the example usage for javax.el ExpressionFactory createValueExpression.

Prototype

public abstract ValueExpression createValueExpression(ELContext context, String expression,
        Class<?> expectedType);

Source Link

Document

Create a new value expression.

Usage

From source file:com.thruzero.common.jsf.utils.FacesUtils.java

private static Object getExpressionValue(String el, Class<?> cls) {
    FacesContext facesContext = FacesContext.getCurrentInstance();
    ExpressionFactory expressionFactory = facesContext.getApplication().getExpressionFactory();
    ValueExpression valueExpression = expressionFactory.createValueExpression(facesContext.getELContext(), el,
            cls);/*from  ww  w . j a v  a 2  s .  com*/

    Object result = valueExpression.getValue(facesContext.getELContext());

    return result;
}

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From source file:AIR.Common.Web.taglib.JsfHelpers.java

public static void setValueExpressions(UIComponent component, Map<String, String> valueExpressions,
        FacesContext context) {//from  w  ww  .  j  a  v  a  2  s.  c  o  m
    if (valueExpressions == null || valueExpressions.size() == 0)
        return;
    if (context == null) {
        context = FacesContext.getCurrentInstance();
    }

    Application application = context.getApplication();
    // http://stackoverflow.com/a/16058002/1961102
    if (valueExpressions != null && !valueExpressions.isEmpty()) {
        ExpressionFactory factory = application.getExpressionFactory();
        ELContext ctx = context.getELContext();
        for (Map.Entry<String, String> entry : valueExpressions.entrySet()) {
            ValueExpression expr = factory.createValueExpression(ctx, entry.getValue(), Object.class);
            component.setValueExpression(entry.getKey(), expr);
        }
    }
}

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From source file:de.beyondjava.angularFaces.core.ELTools.java

public static ValueExpression createValueExpression(String p_expression) {
    FacesContext context = FacesContext.getCurrentInstance();
    ExpressionFactory expressionFactory = context.getApplication().getExpressionFactory();
    ELContext elContext = context.getELContext();
    ValueExpression vex = expressionFactory.createValueExpression(elContext, p_expression, Object.class);
    return vex;/*from ww w .j av a  2  s .  co  m*/
}

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From source file:de.beyondjava.angularFaces.core.ELTools.java

/**
 * Evaluates an EL expression into an object.
 *
 * @param p_expression/*  w  w  w .  ja v a2s  .  c  o  m*/
 * @return
 */
public static Object evalAsObject(String p_expression) {
    FacesContext context = FacesContext.getCurrentInstance();
    ExpressionFactory expressionFactory = context.getApplication().getExpressionFactory();
    ELContext elContext = context.getELContext();
    ValueExpression vex = expressionFactory.createValueExpression(elContext, p_expression, Object.class);
    Object result = vex.getValue(elContext);
    return result;
}

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From source file:de.beyondjava.angularFaces.core.ELTools.java

/**
 * Evaluates an EL expression into a string.
 *
 * @param p_expression/*  w w  w.  j  a va 2s . c om*/
 * @return
 */
public static String evalAsString(String p_expression) {
    FacesContext context = FacesContext.getCurrentInstance();
    ExpressionFactory expressionFactory = context.getApplication().getExpressionFactory();
    ELContext elContext = context.getELContext();
    ValueExpression vex = expressionFactory.createValueExpression(elContext, p_expression, String.class);
    String result = (String) vex.getValue(elContext);
    return result;
}

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From source file:com.googlecode.jsfFlex.taglib.AbstractFlexUIComponentTagBase.java

protected void setBooleanProperty(FacesContext context, UIComponent component, String propName, String value) {

    if (value != null) {
        ExpressionFactory expressionFactory = context.getApplication().getExpressionFactory();
        ValueExpression ve = expressionFactory.createValueExpression(context.getELContext(), value,
                Object.class);
        if (ve != null) {
            component.setValueExpression(propName, ve);
        } else {/*from  w ww . j av a 2  s.  c o m*/
            component.getAttributes().put(propName, Boolean.valueOf(value));
        }
    }
}

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From source file:com.googlecode.jsfFlex.taglib.AbstractFlexUIComponentTagBase.java

protected void setIntegerProperty(FacesContext context, UIComponent component, String propName, String value) {

    if (value != null) {
        ExpressionFactory expressionFactory = context.getApplication().getExpressionFactory();
        ValueExpression ve = expressionFactory.createValueExpression(context.getELContext(), value,
                Object.class);
        if (ve != null) {
            component.setValueExpression(propName, ve);
        } else {/*ww  w  . ja v  a 2 s .  co  m*/
            component.getAttributes().put(propName, Integer.valueOf(value));
        }
    }
}

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From source file:com.googlecode.jsfFlex.taglib.AbstractFlexUIComponentTagBase.java

protected void setLongProperty(FacesContext context, UIComponent component, String propName, String value) {

    if (value != null) {
        ExpressionFactory expressionFactory = context.getApplication().getExpressionFactory();
        ValueExpression ve = expressionFactory.createValueExpression(context.getELContext(), value,
                Object.class);
        if (ve != null) {
            component.setValueExpression(propName, ve);
        } else {//w  ww  .  j a va 2s  .  c o m
            component.getAttributes().put(propName, Long.valueOf(value));
        }
    }
}

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From source file:com.googlecode.jsfFlex.taglib.AbstractFlexUIComponentTagBase.java

protected void setStringProperty(FacesContext context, UIComponent component, String propName, String value) {

    if (value != null) {
        ExpressionFactory expressionFactory = context.getApplication().getExpressionFactory();
        ValueExpression ve = expressionFactory.createValueExpression(context.getELContext(), value,
                Object.class);
        if (ve != null) {
            component.setValueExpression(propName, ve);
        } else {/*from w  ww  . j  a v a  2  s.  com*/
            component.getAttributes().put(propName, value);
        }
    }
}

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From source file:de.openknowledge.extensions.jsf.model.ModelMethod.java

@Override
public void updateModel(FacesContext context) {
    ValueExpression expression = getValueExpression("value");
    SimpleMethodExpressionParser parser = new SimpleMethodExpressionParser(expression.getExpressionString());
    SimpleMethodExpression methodExpression = parser.parse();
    ExpressionFactory expressionFactory = notNull(context, "context may not be null").getApplication()
            .getExpressionFactory();/*from   w ww .j a  v  a2s  .c o  m*/
    ValueExpression baseExpression = expressionFactory.createValueExpression(context.getELContext(),
            "#{" + methodExpression.getBase() + '}', Object.class);
    Object baseValue = baseExpression.getValue(context.getELContext());
    Class<? extends Object> baseType = baseValue.getClass();
    UIInput[] parameterComponents = findComponents(methodExpression);
    Class<?>[] parameterTypes = findParameterTypes(context, methodExpression, expressionFactory,
            parameterComponents);
    Method method = findMethod(baseType, methodExpression.getMethodName(), parameterTypes);
    Object[] parameters = findParameters(context, methodExpression, expressionFactory, parameterComponents,
            parameterTypes);
    try {
        method.invoke(baseValue, parameters);
    } catch (InvocationTargetException e) {
        throw new ELException(e.getTargetException());
    } catch (Exception e) {
        throw new ELException(e);
    }
}

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