| /* |
| * 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 org.apache.myfaces.view.facelets.tag; |
| |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.net.URL; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import javax.el.ELException; |
| import javax.el.ValueExpression; |
| import javax.faces.FacesException; |
| import javax.faces.component.UIComponent; |
| import javax.faces.view.facelets.FaceletContext; |
| import javax.faces.view.facelets.FaceletException; |
| import javax.faces.view.facelets.TagAttribute; |
| import javax.faces.view.facelets.TagConfig; |
| import javax.faces.view.facelets.TagException; |
| import javax.faces.view.facelets.TagHandler; |
| |
| import org.apache.myfaces.view.facelets.AbstractFaceletContext; |
| import org.apache.myfaces.view.facelets.ELExpressionCacheMode; |
| import org.apache.myfaces.view.facelets.FaceletCompositionContext; |
| import org.apache.myfaces.view.facelets.TemplateClient; |
| import org.apache.myfaces.view.facelets.TemplateContext; |
| import org.apache.myfaces.view.facelets.el.FaceletStateValueExpression; |
| import org.apache.myfaces.view.facelets.impl.TemplateContextImpl; |
| import org.apache.myfaces.view.facelets.tag.jsf.ComponentSupport; |
| import org.apache.myfaces.view.facelets.tag.jsf.FaceletState; |
| import org.apache.myfaces.view.facelets.tag.ui.DefineHandler; |
| |
| /** |
| * A Tag that is specified in a FaceletFile. Takes all attributes specified and sets them on the FaceletContext before |
| * including the targeted Facelet file. |
| * |
| * @author Jacob Hookom |
| * @version $Id$ |
| */ |
| final class UserTagHandler extends TagHandler implements TemplateClient, ComponentContainerHandler |
| { |
| |
| protected final TagAttribute[] _vars; |
| protected final URL _location; |
| protected final Map<String, DefineHandler> _handlers; |
| |
| /** |
| * @param config |
| */ |
| public UserTagHandler(TagConfig config, URL location) |
| { |
| super(config); |
| this._vars = this.tag.getAttributes().getAll(); |
| this._location = location; |
| |
| Collection<DefineHandler> defines = TagHandlerUtils.findNextByType(nextHandler, DefineHandler.class); |
| if (defines.isEmpty()) |
| { |
| _handlers = null; |
| } |
| else |
| { |
| _handlers = new HashMap<>(defines.size()); |
| for (DefineHandler handler : defines) |
| { |
| _handlers.put(handler.getName(), handler); |
| } |
| } |
| } |
| |
| /** |
| * Iterate over all TagAttributes and set them on the FaceletContext's VariableMapper, then include the target |
| * Facelet. Finally, replace the old VariableMapper. |
| * |
| * @see TagAttribute#getValueExpression(FaceletContext, Class) |
| * @see javax.el.VariableMapper |
| * @see javax.faces.view.facelets.FaceletHandler#apply(javax.faces.view.facelets.FaceletContext, |
| * javax.faces.component.UIComponent) |
| */ |
| @Override |
| public void apply(FaceletContext ctx, UIComponent parent) throws IOException, FacesException, FaceletException, |
| ELException |
| { |
| AbstractFaceletContext actx = (AbstractFaceletContext) ctx; |
| // eval include |
| try |
| { |
| String[] names = null; |
| ValueExpression[] values = null; |
| if (this._vars.length > 0) |
| { |
| names = new String[_vars.length]; |
| values = new ValueExpression[_vars.length]; |
| for (int i = 0; i < _vars.length; i++) |
| { |
| names[i] = _vars[i].getLocalName(); |
| values[i] = _vars[i].getValueExpression(ctx, Object.class); |
| } |
| } |
| actx.pushTemplateContext(new TemplateContextImpl()); |
| actx.pushClient(this); |
| |
| FaceletCompositionContext fcc = FaceletCompositionContext.getCurrentInstance(ctx); |
| String uniqueId = fcc.startComponentUniqueIdSection(); |
| try |
| { |
| if (this._vars.length > 0) |
| { |
| if (ELExpressionCacheMode.alwaysRecompile.equals(actx.getELExpressionCacheMode())) |
| { |
| FaceletState faceletState = ComponentSupport.getFaceletState(ctx, parent, true); |
| for (int i = 0; i < this._vars.length; i++) |
| { |
| faceletState.putBinding(uniqueId, names[i], values[i]); |
| ValueExpression ve = new FaceletStateValueExpression(uniqueId, names[i]); |
| actx.getTemplateContext().setParameter(names[i], ve); |
| } |
| } |
| else |
| { |
| for (int i = 0; i < this._vars.length; i++) |
| { |
| ((AbstractFaceletContext) ctx).getTemplateContext().setParameter(names[i], values[i]); |
| } |
| } |
| } |
| |
| // Disable caching always, even in 'always' mode |
| // The only mode that can support EL caching in this condition is alwaysRedirect. |
| if (!ELExpressionCacheMode.alwaysRecompile.equals(actx.getELExpressionCacheMode())) |
| { |
| actx.getTemplateContext().setAllowCacheELExpressions(false); |
| } |
| ctx.includeFacelet(parent, this._location); |
| } |
| finally |
| { |
| fcc.endComponentUniqueIdSection(); |
| } |
| } |
| catch (FileNotFoundException e) |
| { |
| throw new TagException(this.tag, e.getMessage()); |
| } |
| finally |
| { |
| // make sure we undo our changes |
| actx.popClient(this); |
| actx.popTemplateContext(); |
| } |
| } |
| |
| @Override |
| public boolean apply(FaceletContext ctx, UIComponent parent, String name) throws IOException, FacesException, |
| FaceletException, ELException |
| { |
| if (name != null) |
| { |
| if (this._handlers == null) |
| { |
| return false; |
| } |
| DefineHandler handler = (DefineHandler) this._handlers.get(name); |
| if (handler != null) |
| { |
| AbstractFaceletContext actx = (AbstractFaceletContext) ctx; |
| TemplateContext itc = actx.popTemplateContext(); |
| try |
| { |
| handler.applyDefinition(ctx, parent); |
| } |
| finally |
| { |
| actx.pushTemplateContext(itc); |
| } |
| return true; |
| } |
| else |
| { |
| return false; |
| } |
| } |
| else |
| { |
| AbstractFaceletContext actx = (AbstractFaceletContext) ctx; |
| TemplateContext itc = actx.popTemplateContext(); |
| try |
| { |
| this.nextHandler.apply(ctx, parent); |
| } |
| finally |
| { |
| actx.pushTemplateContext(itc); |
| } |
| return true; |
| } |
| } |
| |
| } |