Java Code Examples for javax.el.ELContext#getContext()

@Override
public void setValue(ELContext context, Object base, Object property, Object value) {
    Objects.requireNonNull(context);

    if (base == null) {
        context.setPropertyResolved(base, property);
        if (property != null) {
            String key = property.toString();
            PageContext page = (PageContext) context.getContext(JspContext.class);
            int scope = page.getAttributesScope(key);
            if (scope != 0) {
                page.setAttribute(key, value, scope);
            } else {
                page.setAttribute(key, value);
            }
        }
    }
}
 

@Override
public Object getValue(ELContext context, Object base, Object property)
        throws NullPointerException, PropertyNotFoundException, ELException {
    if (context == null) {
        throw new NullPointerException();
    }

    if (base == null) {
        context.setPropertyResolved(true);
        if (property != null) {
            String key = property.toString();
            PageContext page = (PageContext) context
                    .getContext(JspContext.class);
            return page.findAttribute(key);
        }
    }

    return null;
}
 

@Override
public void setValue(ELContext context, Object base, Object property,
        Object value) throws NullPointerException,
        PropertyNotFoundException, PropertyNotWritableException,
        ELException {
    if (context == null) {
        throw new NullPointerException();
    }

    if (base == null) {
        context.setPropertyResolved(true);
        if (property != null) {
            String key = property.toString();
            PageContext page = (PageContext) context
                    .getContext(JspContext.class);
            int scope = page.getAttributesScope(key);
            if (scope != 0) {
                page.setAttribute(key, value, scope);
            } else {
                page.setAttribute(key, value);
            }
        }
    }
}
 

@Override
public Object getValue(ELContext context, Object base, Object property)
        throws NullPointerException, PropertyNotFoundException, ELException {
    if (context == null) {
        throw new NullPointerException();
    }

    if (base == null) {
        context.setPropertyResolved(true);
        if (property != null) {
            String key = property.toString();
            PageContext page = (PageContext) context
                    .getContext(JspContext.class);
            return page.findAttribute(key);
        }
    }

    return null;
}
 

@Override
public void setValue(ELContext context, Object base, Object property,
        Object value) throws NullPointerException,
        PropertyNotFoundException, PropertyNotWritableException,
        ELException {
    if (context == null) {
        throw new NullPointerException();
    }

    if (base == null) {
        context.setPropertyResolved(true);
        if (property != null) {
            String key = property.toString();
            PageContext page = (PageContext) context
                    .getContext(JspContext.class);
            int scope = page.getAttributesScope(key);
            if (scope != 0) {
                page.setAttribute(key, value, scope);
            } else {
                page.setAttribute(key, value);
            }
        }
    }
}
 

@Override
public Object getValue(ELContext context, Object base, Object property) {
  if (base == null) {
    VariableContext variableContext = (VariableContext) context.getContext(VariableContext.class);
    if(variableContext != null) {
      if(VARIABLE_CONTEXT_KEY.equals(property)) {
        context.setPropertyResolved(true);
        return variableContext;
      }
      TypedValue typedValue = variableContext.resolve((String) property);
      if(typedValue != null) {
        context.setPropertyResolved(true);
        return unpack(typedValue);
      }
    }
  }
  return null;
}
 

@Override
public Object getValue(ELContext context, Object base, Object property) {
  if (base == null) {
    VariableContext variableContext = (VariableContext) context.getContext(VariableContext.class);
    if(variableContext != null) {
      if(VARIABLE_CONTEXT_KEY.equals(property)) {
        context.setPropertyResolved(true);
        return variableContext;
      }
      TypedValue typedValue = variableContext.resolve((String) property);
      if(typedValue != null) {
        context.setPropertyResolved(true);
        return unpack(typedValue);
      }
    }
  }
  return null;
}
 

@Override
public Object getValue(ELContext context, Object base, Object property) {
    Objects.requireNonNull(context);

    if (base == null && property != null) {
        int idx = Arrays.binarySearch(SCOPE_NAMES, property.toString());

        if (idx >= 0) {
            PageContext page = (PageContext) context
                    .getContext(JspContext.class);
            context.setPropertyResolved(base, property);
            switch (idx) {
            case APPLICATIONSCOPE:
                return ScopeManager.get(page).getApplicationScope();
            case COOKIE:
                return ScopeManager.get(page).getCookie();
            case HEADER:
                return ScopeManager.get(page).getHeader();
            case HEADERVALUES:
                return ScopeManager.get(page).getHeaderValues();
            case INITPARAM:
                return ScopeManager.get(page).getInitParam();
            case PAGECONTEXT:
                return ScopeManager.get(page).getPageContext();
            case PAGESCOPE:
                return ScopeManager.get(page).getPageScope();
            case PARAM:
                return ScopeManager.get(page).getParam();
            case PARAM_VALUES:
                return ScopeManager.get(page).getParamValues();
            case REQUEST_SCOPE:
                return ScopeManager.get(page).getRequestScope();
            case SESSION_SCOPE:
                return ScopeManager.get(page).getSessionScope();
            }
        }
    }
    return null;
}
 

@Override
public Object getValue(final ELContext elContext, final Object base, final Object property) {

	if (property == null) {
		throw new PropertyNotFoundException();
	}
	
	FacesContext facesContext = (FacesContext) elContext.getContext(FacesContext.class);

	if ((null == base) && BeyondViewScope.SCOPE_NAME.equals(property.toString())) {

		// Scope is referenced directly
		BeyondViewScope scope = getScope(facesContext);
		elContext.setPropertyResolved(true);
		return scope;

	} else if ((null != base) && (base instanceof BeyondViewScope)) {

		// An object within the scope is referenced

		return resolve(facesContext, (BeyondViewScope) base, property.toString());

	} else if (null == base) {
		BeyondViewScope customScope = getScope(facesContext);
		return null != customScope ? resolve(facesContext, customScope, property.toString()):null;

	}
	return null;
}
 

@Override
public Object getValue(ELContext context, Object base, Object property) {
    Objects.requireNonNull(context);

    Object result = null;

    if (base == null) {
        context.setPropertyResolved(base, property);
        if (property != null) {
            String key = property.toString();
            PageContext page = (PageContext) context.getContext(JspContext.class);
            result = page.findAttribute(key);

            if (result == null) {
                boolean resolveClass = true;
                // Performance short-cut available when running on Tomcat
                if (AST_IDENTIFIER_KEY != null) {
                    // Tomcat will set this key to Boolean.TRUE if the
                    // identifier is a stand-alone identifier (i.e.
                    // identifier) rather than part of an AstValue (i.e.
                    // identifier.something). Imports do not need to be
                    // checked if this is a stand-alone identifier
                    Boolean value = (Boolean) context.getContext(AST_IDENTIFIER_KEY);
                    if (value != null && value.booleanValue()) {
                        resolveClass = false;
                    }
                }
                // This might be the name of an imported class
                ImportHandler importHandler = context.getImportHandler();
                if (importHandler != null) {
                    Class<?> clazz = null;
                    if (resolveClass) {
                        clazz = importHandler.resolveClass(key);
                    }
                    if (clazz != null) {
                        result = new ELClass(clazz);
                    }
                    if (result == null) {
                        // This might be the name of an imported static field
                        clazz = importHandler.resolveStatic(key);
                        if (clazz != null) {
                            try {
                                result = clazz.getField(key).get(null);
                            } catch (IllegalArgumentException | IllegalAccessException |
                                    NoSuchFieldException | SecurityException e) {
                                // Most (all?) of these should have been
                                // prevented by the checks when the import
                                // was defined.
                            }
                        }
                    }
                }
            }
        }
    }

    return result;
}
 

@Override
public Object getValue(ELContext context, Object base, Object property)
        throws NullPointerException, PropertyNotFoundException, ELException {
    if (context == null) {
        throw new NullPointerException();
    }

    if (base == null && property != null) {
        int idx = Arrays.binarySearch(SCOPE_NAMES, property.toString());

        if (idx >= 0) {
            PageContext page = (PageContext) context
                    .getContext(JspContext.class);
            context.setPropertyResolved(true);
            switch (idx) {
            case APPLICATIONSCOPE:
                return ScopeManager.get(page).getApplicationScope();
            case COOKIE:
                return ScopeManager.get(page).getCookie();
            case HEADER:
                return ScopeManager.get(page).getHeader();
            case HEADERVALUES:
                return ScopeManager.get(page).getHeaderValues();
            case INITPARAM:
                return ScopeManager.get(page).getInitParam();
            case PAGECONTEXT:
                return ScopeManager.get(page).getPageContext();
            case PAGESCOPE:
                return ScopeManager.get(page).getPageScope();
            case PARAM:
                return ScopeManager.get(page).getParam();
            case PARAM_VALUES:
                return ScopeManager.get(page).getParamValues();
            case REQUEST_SCOPE:
                return ScopeManager.get(page).getRequestScope();
            case SESSION_SCOPE:
                return ScopeManager.get(page).getSessionScope();
            }
        }
    }
    return null;
}
 

/**
 * If the base object is <code>null</code>, searches the page, 
 * request, session and application scopes for an attribute with
 * the given name and returns it, or <code>null</code> if no
 * attribute exists with the current name.
 *
 * <p>The <code>propertyResolved</code> property of the 
 * <code>ELContext</code> object must be set to <code>true</code> by 
 * this resolver before returning if base is <code>null</code>. If 
 * this property is not <code>true</code> after this method is called,
 * the caller should ignore the return value.</p>
 *
 * @param context The context of this evaluation.
 * @param base Only <code>null</code> is handled by this resolver.
 *     Other values will result in an immediate return.
 * @param property The name of the scoped attribute to resolve.
 * @return If the <code>propertyResolved</code> property of 
 *     <code>ELContext</code> was set to <code>true</code>, then
 *     the scoped attribute; otherwise undefined.
 * @throws NullPointerException if context is <code>null</code>
 * @throws ELException if an exception was thrown while performing
 *     the property or variable resolution. The thrown exception
 *     must be included as the cause property of this exception, if
 *     available.
 */
public Object getValue(ELContext context,
                       Object base,
                       Object property) {

    if (context == null) {
        throw new NullPointerException();
    }

    if (base == null) {
        context.setPropertyResolved(true);
        if (property instanceof String) {
            String attribute = (String) property;
            PageContext ctxt = (PageContext)
                                   context.getContext(JspContext.class);
            return ctxt.findAttribute(attribute);
        }
    }
    return null;
}
 

/**
 * If the base object is <code>null</code>, and the property matches
 * the name of a JSP implicit object, returns the implicit object.
 *
 * <p>The <code>propertyResolved</code> property of the 
 * <code>ELContext</code> object must be set to <code>true</code> by 
 * this resolver before returning if an implicit object is matched. If 
 * this property is not <code>true</code> after this method is called,
 * the caller should ignore the return value.</p>
 *
 * @param context The context of this evaluation.
 * @param base Only <code>null</code> is handled by this resolver.
 *     Other values will result in an immediate return.
 * @param property The name of the implicit object to resolve.
 * @return If the <code>propertyResolved</code> property of 
 *     <code>ELContext</code> was set to <code>true</code>, then
 *     the implicit object; otherwise undefined.
 * @throws NullPointerException if context is <code>null</code>
 * @throws ELException if an exception was thrown while performing
 *     the property or variable resolution. The thrown exception
 *     must be included as the cause property of this exception, if
 *     available.
 */
public Object getValue(ELContext context,
                       Object base,
                       Object property) {

    if (context == null) {
        throw new NullPointerException();
    }

    if (base != null) {
        return null;
    }

    PageContext ctxt = (PageContext)context.getContext(JspContext.class);
                           
    if ("pageContext".equals(property)) {
        context.setPropertyResolved(true);
        return ctxt;
    }
    ImplicitObjects implicitObjects =
        ImplicitObjects.getImplicitObjects(ctxt);
    if ("pageScope".equals(property)) {
        context.setPropertyResolved(true);
        return implicitObjects.getPageScopeMap();
    }
    if ("requestScope".equals(property)) {
        context.setPropertyResolved(true);
        return implicitObjects.getRequestScopeMap();
    }
    if ("sessionScope".equals(property)) {
        context.setPropertyResolved(true);
        return implicitObjects.getSessionScopeMap();
    }
    if ("applicationScope".equals (property)) {
        context.setPropertyResolved(true);
        return implicitObjects.getApplicationScopeMap ();
    }
    if ("param".equals (property)) {
        context.setPropertyResolved(true);
        return implicitObjects.getParamMap();
    }
    if ("paramValues".equals (property)) {
        context.setPropertyResolved(true);
        return implicitObjects.getParamsMap();
    }
    if ("header".equals (property)) {
        context.setPropertyResolved(true);
        return implicitObjects.getHeaderMap();
    }
    if ("headerValues".equals (property)) {
        context.setPropertyResolved(true);
        return implicitObjects.getHeadersMap();
    }
    if ("initParam".equals (property)) {
        context.setPropertyResolved(true);
        return implicitObjects.getInitParamMap ();
    }
    if ("cookie".equals (property)) {
        context.setPropertyResolved(true);
        return implicitObjects.getCookieMap ();
    }
    return null;
}
 

@Override
public Object getValue(ELContext context, Object base, Object property)
        throws NullPointerException, PropertyNotFoundException, ELException {
    if (context == null) {
        throw new NullPointerException();
    }

    if (base == null && property != null) {
        int idx = Arrays.binarySearch(SCOPE_NAMES, property.toString());

        if (idx >= 0) {
            PageContext page = (PageContext) context
                    .getContext(JspContext.class);
            context.setPropertyResolved(true);
            switch (idx) {
            case APPLICATIONSCOPE:
                return ScopeManager.get(page).getApplicationScope();
            case COOKIE:
                return ScopeManager.get(page).getCookie();
            case HEADER:
                return ScopeManager.get(page).getHeader();
            case HEADERVALUES:
                return ScopeManager.get(page).getHeaderValues();
            case INITPARAM:
                return ScopeManager.get(page).getInitParam();
            case PAGECONTEXT:
                return ScopeManager.get(page).getPageContext();
            case PAGESCOPE:
                return ScopeManager.get(page).getPageScope();
            case PARAM:
                return ScopeManager.get(page).getParam();
            case PARAM_VALUES:
                return ScopeManager.get(page).getParamValues();
            case REQUEST_SCOPE:
                return ScopeManager.get(page).getRequestScope();
            case SESSION_SCOPE:
                return ScopeManager.get(page).getSessionScope();
            }
        }
    }
    return null;
}
 

/**
 * If the base object is <code>null</code>, sets an existing scoped
 * attribute to the new value, or creates a new scoped attribute if one
 * does not exist by this name.
 *
 * <p>If the provided attribute name matches the key of an attribute 
 * in page scope, request scope, session scope, or application scope, the 
 * corresponding attribute value will be replaced by the provided value.
 * Otherwise, a new page scope attribute will be created with the
 * given name and value.</p>
 *
 * <p>The <code>propertyResolved</code> property of the 
 * <code>ELContext</code> object must be set to <code>true</code> by 
 * this resolver before returning if base is <code>null</code>. If 
 * this property is not <code>true</code> after this method is called,
 * the caller should ignore the return value.</p>
 *
 * @param context The context of this evaluation.
 * @param base Only <code>null</code> is handled by this resolver.
 *     Other values will result in an immediate return.
 * @param property The name of the scoped attribute to set.
 * @param val The value for the scoped attribute.
 * @throws NullPointerException if context is <code>null</code>.
 * @throws ELException if an exception was thrown while performing
 *     the property or variable resolution. The thrown exception
 *     must be included as the cause property of this exception, if
 *     available.
 */
public void  setValue(ELContext context,
                      Object base,
                      Object property,
                      Object val) {
    if (context == null) {
        throw new NullPointerException();
    }

    if (base == null) {
        context.setPropertyResolved(true);
        if (property instanceof String) {
            PageContext ctxt = (PageContext)
                                   context.getContext(JspContext.class);
            String attr = (String) property;
            if (ctxt.getAttribute(attr, PageContext.REQUEST_SCOPE) != null)
                ctxt.setAttribute(attr, val, PageContext.REQUEST_SCOPE);
            else if (ctxt.getAttribute(attr, PageContext.SESSION_SCOPE) != null)
                ctxt.setAttribute(attr, val, PageContext.SESSION_SCOPE);
            else if (ctxt.getAttribute(attr, PageContext.APPLICATION_SCOPE) != null)
                ctxt.setAttribute(attr, val, PageContext.APPLICATION_SCOPE);
            else {
                ctxt.setAttribute(attr, val, PageContext.PAGE_SCOPE);
            }
        }
    }
}
 

@Override
public Object getValue(final ELContext elContext, final Object base, final Object property) {

	if (property == null) {
		throw new PropertyNotFoundException();
	}
	
	FacesContext facesContext = (FacesContext) elContext.getContext(FacesContext.class);

	if ((null == base) && ManualScope.SCOPE_NAME.equals(property.toString())) {

		// Scope is referenced directly

		ManualScope scope = getScope(facesContext);
		elContext.setPropertyResolved(true);
		return scope;

	} else if ((null != base) && (base instanceof ManualScope)) {

		// An object within the scope is referenced

		return resolve(facesContext, (ManualScope) base, property.toString());

	} else if (null == base) {
		ManualScope customScope = getScope(facesContext);
		return null != customScope ? resolve(facesContext, customScope, property.toString()):null;

	}
	return null;
}