| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package javax.servlet.jsp.el; |
| |
| import java.beans.FeatureDescriptor; |
| import java.util.ArrayList; |
| import java.util.Enumeration; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import javax.el.ELContext; |
| import javax.el.ELException; |
| import javax.el.ELResolver; |
| import javax.el.PropertyNotFoundException; |
| import javax.el.PropertyNotWritableException; |
| import javax.servlet.jsp.JspContext; |
| import javax.servlet.jsp.PageContext; |
| |
| public class ScopedAttributeELResolver extends ELResolver { |
| |
| public ScopedAttributeELResolver() { |
| super(); |
| } |
| |
| @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 Class<Object> getType(ELContext context, Object base, Object property) |
| throws NullPointerException, PropertyNotFoundException, ELException { |
| if (context == null) { |
| throw new NullPointerException(); |
| } |
| |
| if (base == null) { |
| context.setPropertyResolved(true); |
| return Object.class; |
| } |
| |
| 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 boolean isReadOnly(ELContext context, Object base, Object property) |
| throws NullPointerException, PropertyNotFoundException, ELException { |
| if (context == null) { |
| throw new NullPointerException(); |
| } |
| |
| if (base == null) { |
| context.setPropertyResolved(true); |
| } |
| |
| return false; |
| } |
| |
| @Override |
| public Iterator<FeatureDescriptor> getFeatureDescriptors(ELContext context, |
| Object base) { |
| |
| PageContext ctxt = (PageContext) context.getContext(JspContext.class); |
| List<FeatureDescriptor> list = new ArrayList<FeatureDescriptor>(); |
| Enumeration<String> e; |
| Object value; |
| String name; |
| |
| e = ctxt.getAttributeNamesInScope(PageContext.PAGE_SCOPE); |
| while (e.hasMoreElements()) { |
| name = e.nextElement(); |
| value = ctxt.getAttribute(name, PageContext.PAGE_SCOPE); |
| FeatureDescriptor descriptor = new FeatureDescriptor(); |
| descriptor.setName(name); |
| descriptor.setDisplayName(name); |
| descriptor.setExpert(false); |
| descriptor.setHidden(false); |
| descriptor.setPreferred(true); |
| descriptor.setShortDescription("page scoped attribute"); |
| descriptor.setValue("type", value.getClass()); |
| descriptor.setValue("resolvableAtDesignTime", Boolean.FALSE); |
| list.add(descriptor); |
| } |
| |
| e = ctxt.getAttributeNamesInScope(PageContext.REQUEST_SCOPE); |
| while (e.hasMoreElements()) { |
| name = e.nextElement(); |
| value = ctxt.getAttribute(name, PageContext.REQUEST_SCOPE); |
| FeatureDescriptor descriptor = new FeatureDescriptor(); |
| descriptor.setName(name); |
| descriptor.setDisplayName(name); |
| descriptor.setExpert(false); |
| descriptor.setHidden(false); |
| descriptor.setPreferred(true); |
| descriptor.setShortDescription("request scope attribute"); |
| descriptor.setValue("type", value.getClass()); |
| descriptor.setValue("resolvableAtDesignTime", Boolean.FALSE); |
| list.add(descriptor); |
| } |
| |
| if (ctxt.getSession() != null) { |
| e = ctxt.getAttributeNamesInScope(PageContext.SESSION_SCOPE); |
| while (e.hasMoreElements()) { |
| name = e.nextElement(); |
| value = ctxt.getAttribute(name, PageContext.SESSION_SCOPE); |
| FeatureDescriptor descriptor = new FeatureDescriptor(); |
| descriptor.setName(name); |
| descriptor.setDisplayName(name); |
| descriptor.setExpert(false); |
| descriptor.setHidden(false); |
| descriptor.setPreferred(true); |
| descriptor.setShortDescription("session scoped attribute"); |
| descriptor.setValue("type", value.getClass()); |
| descriptor.setValue("resolvableAtDesignTime", Boolean.FALSE); |
| list.add(descriptor); |
| } |
| } |
| |
| e = ctxt.getAttributeNamesInScope(PageContext.APPLICATION_SCOPE); |
| while (e.hasMoreElements()) { |
| name = e.nextElement(); |
| value = ctxt.getAttribute(name, PageContext.APPLICATION_SCOPE); |
| FeatureDescriptor descriptor = new FeatureDescriptor(); |
| descriptor.setName(name); |
| descriptor.setDisplayName(name); |
| descriptor.setExpert(false); |
| descriptor.setHidden(false); |
| descriptor.setPreferred(true); |
| descriptor.setShortDescription("application scoped attribute"); |
| descriptor.setValue("type", value.getClass()); |
| descriptor.setValue("resolvableAtDesignTime", Boolean.FALSE); |
| list.add(descriptor); |
| } |
| return list.iterator(); |
| } |
| |
| @Override |
| public Class<String> getCommonPropertyType(ELContext context, Object base) { |
| if (base == null) { |
| return String.class; |
| } |
| return null; |
| } |
| } |