Example usage for javax.el ELResolver getValue

Introduction

In this page you can find the example usage for javax.el ELResolver getValue.

Prototype

public abstract Object getValue(ELContext context, Object base, Object property);

Source Link

Usage

From source file:eu.planets_project.tb.gui.util.JSFUtil.java

public static Object getManagedObject(String objectName) {
    FacesContext context = FacesContext.getCurrentInstance();
    if (context == null)
        return null;
    ELResolver resolver = context.getApplication().getELResolver();
    Object requestedObject = resolver.getValue(context.getELContext(), null, objectName);
    return requestedObject;
}

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From source file:org.apache.myfaces.config.ManagedBeanBuilder.java

@SuppressWarnings("unchecked")
private void initializeProperties(FacesContext facesContext, ManagedBean beanConfiguration, Object bean) {
    ELResolver elResolver = facesContext.getApplication().getELResolver();
    ELContext elContext = facesContext.getELContext();

    for (ManagedProperty property : beanConfiguration.getManagedProperties()) {
        Object value = null;//from w  ww.  j a  va 2  s  . com

        switch (property.getType()) {
        case ManagedProperty.TYPE_LIST:

            // JSF 1.1, 5.3.1.3
            // Call the property getter, if it exists.
            // If the getter returns null or doesn't exist, create a java.util.ArrayList,
            // otherwise use the returned Object ...
            if (PropertyUtils.isReadable(bean, property.getPropertyName())) {
                value = elResolver.getValue(elContext, bean, property.getPropertyName());
            }

            value = value == null ? new ArrayList<Object>() : value;

            if (value instanceof List) {
                initializeList(facesContext, property.getListEntries(), (List<Object>) value);

            } else if (value != null && value.getClass().isArray()) {
                int length = Array.getLength(value);
                ArrayList<Object> temp = new ArrayList<Object>(length);
                for (int i = 0; i < length; i++) {
                    temp.add(Array.get(value, i));
                }
                initializeList(facesContext, property.getListEntries(), temp);
                value = Array.newInstance(value.getClass().getComponentType(), temp.size());
                length = temp.size();

                for (int i = 0; i < length; i++) {
                    Array.set(value, i, temp.get(i));
                }
            } else {
                value = new ArrayList<Object>();
                initializeList(facesContext, property.getListEntries(), (List<Object>) value);
            }

            break;
        case ManagedProperty.TYPE_MAP:

            // JSF 1.1, 5.3.1.3
            // Call the property getter, if it exists.
            // If the getter returns null or doesn't exist, create a java.util.HashMap,
            // otherwise use the returned java.util.Map .
            if (PropertyUtils.isReadable(bean, property.getPropertyName())) {
                value = elResolver.getValue(elContext, bean, property.getPropertyName());
            }
            value = value == null ? new HashMap<Object, Object>() : value;

            if (!(value instanceof Map)) {
                value = new HashMap<Object, Object>();
            }

            initializeMap(facesContext, property.getMapEntries(), (Map<Object, Object>) value);
            break;
        case ManagedProperty.TYPE_NULL:
            break;
        case ManagedProperty.TYPE_VALUE:
            // check for correct scope of a referenced bean
            if (!isInValidScope(facesContext, property, beanConfiguration)) {
                throw new FacesException("Property " + property.getPropertyName()
                        + " references object in a scope with shorter lifetime than the target scope "
                        + beanConfiguration.getManagedBeanScope());
            }
            value = property.getRuntimeValue(facesContext);
            break;
        default:
            throw new FacesException("unknown ManagedProperty type: " + property.getType());
        }

        Class<?> propertyClass = null;

        if (property.getPropertyClass() == null) {
            propertyClass = elResolver.getType(elContext, bean, property.getPropertyName());
        } else {
            propertyClass = ClassUtils.simpleJavaTypeToClass(property.getPropertyClass());
        }

        if (null == propertyClass) {
            throw new IllegalArgumentException(
                    "unable to find the type of property " + property.getPropertyName());
        }

        Object coercedValue = coerceToType(facesContext, value, propertyClass);
        elResolver.setValue(elContext, bean, property.getPropertyName(), coercedValue);
    }
}

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From source file:org.apache.myfaces.ov2021.config.ManagedBeanBuilder.java

@SuppressWarnings("unchecked")
private void initializeProperties(FacesContext facesContext, ManagedBean beanConfiguration, Object bean) {
    ELResolver elResolver = facesContext.getApplication().getELResolver();
    ELContext elContext = facesContext.getELContext();

    for (ManagedProperty property : beanConfiguration.getManagedProperties()) {
        Object value = null;/* w ww.  ja v  a  2s  .c o m*/

        switch (property.getType()) {
        case ManagedProperty.TYPE_LIST:

            // JSF 1.1, 5.3.1.3
            // Call the property getter, if it exists.
            // If the getter returns null or doesn't exist, create a java.util.ArrayList,
            // otherwise use the returned Object ...
            if (PropertyUtils.isReadable(bean, property.getPropertyName())) {
                value = elResolver.getValue(elContext, bean, property.getPropertyName());
            }

            value = value == null ? new ArrayList<Object>() : value;

            if (value instanceof List) {
                initializeList(facesContext, property.getListEntries(), (List<Object>) value);

            } else if (value != null && value.getClass().isArray()) {
                int length = Array.getLength(value);
                ArrayList<Object> temp = new ArrayList<Object>(length);
                for (int i = 0; i < length; i++) {
                    temp.add(Array.get(value, i));
                }
                initializeList(facesContext, property.getListEntries(), temp);
                value = Array.newInstance(value.getClass().getComponentType(), temp.size());
                length = temp.size();

                for (int i = 0; i < length; i++) {
                    Array.set(value, i, temp.get(i));
                }
            } else {
                value = new ArrayList<Object>();
                initializeList(facesContext, property.getListEntries(), (List<Object>) value);
            }

            break;
        case ManagedProperty.TYPE_MAP:

            // JSF 1.1, 5.3.1.3
            // Call the property getter, if it exists.
            // If the getter returns null or doesn't exist, create a java.util.HashMap,
            // otherwise use the returned java.util.Map .
            if (PropertyUtils.isReadable(bean, property.getPropertyName()))
                value = elResolver.getValue(elContext, bean, property.getPropertyName());
            value = value == null ? new HashMap<Object, Object>() : value;

            if (!(value instanceof Map)) {
                value = new HashMap<Object, Object>();
            }

            initializeMap(facesContext, property.getMapEntries(), (Map<Object, Object>) value);
            break;
        case ManagedProperty.TYPE_NULL:
            break;
        case ManagedProperty.TYPE_VALUE:
            // check for correct scope of a referenced bean
            if (!isInValidScope(facesContext, property, beanConfiguration)) {
                throw new FacesException("Property " + property.getPropertyName()
                        + " references object in a scope with shorter lifetime than the target scope "
                        + beanConfiguration.getManagedBeanScope());
            }
            value = property.getRuntimeValue(facesContext);
            break;
        }

        Class<?> propertyClass = null;

        if (property.getPropertyClass() == null) {
            propertyClass = elResolver.getType(elContext, bean, property.getPropertyName());
        } else {
            propertyClass = ClassUtils.simpleJavaTypeToClass(property.getPropertyClass());
        }

        if (null == propertyClass) {
            throw new IllegalArgumentException(
                    "unable to find the type of property " + property.getPropertyName());
        }

        Object coercedValue = coerceToType(facesContext, value, propertyClass);
        elResolver.setValue(elContext, bean, property.getPropertyName(), coercedValue);
    }
}

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