| /* |
| * 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.cocoon.forms.binding; |
| |
| import org.apache.cocoon.forms.util.DomHelper; |
| |
| import org.w3c.dom.Element; |
| |
| /** |
| * ContextJXPathBindingBuilder provides a helper class for the Factory |
| * implemented in {@link JXPathBindingManager} that helps construct the |
| * actual {@link ContextJXPathBinding} out of the configuration in the |
| * provided configElement which looks like: |
| * <pre><code> |
| * <fb:context path="<i>xpath expression</i>"> |
| * <!-- in here come the nested child bindings on the sub-context --> |
| * </fb:context> |
| * </code></pre> |
| * <p>The <code>fb:context</code> element can have an optional <code>factory</code> |
| * attribute, whose value, if present, must be the name of a class extending |
| * {@link org.apache.commons.jxpath.AbstractFactory}. If this attribute is present, |
| * an instance of the named class is registered with the JXPath context and can be used to |
| * create an object corresponding to the path of the <code>fb:context</code> element |
| * upon save, if needed.</p> |
| * |
| * @version $Id$ |
| */ |
| public class ContextJXPathBindingBuilder extends JXPathBindingBuilderBase { |
| |
| /** |
| * Creates an instance of ContextJXPathBinding with the configured |
| * path and nested child bindings from the declarations in the bindingElm |
| */ |
| public JXPathBindingBase buildBinding(Element bindingElm, |
| JXPathBindingManager.Assistant assistant) |
| throws BindingException { |
| |
| try { |
| CommonAttributes commonAtts = JXPathBindingBuilderBase.getCommonAttributes(bindingElm); |
| String xpath = DomHelper.getAttribute(bindingElm, "path", null); |
| String factory = DomHelper.getAttribute(bindingElm, "factory", null); |
| |
| JXPathBindingBase[] childBindings = new JXPathBindingBase[0]; |
| |
| // do inheritance |
| ContextJXPathBinding otherBinding = (ContextJXPathBinding) assistant.getContext().getSuperBinding(); |
| if (otherBinding != null) { |
| childBindings = otherBinding.getChildBindings(); |
| commonAtts = JXPathBindingBuilderBase.mergeCommonAttributes(otherBinding.getCommonAtts(), commonAtts); |
| |
| if (xpath == null) { |
| xpath = otherBinding.getXPath(); |
| } |
| if (factory == null) { |
| factory = otherBinding.getFactoryClassName(); |
| } |
| |
| } |
| |
| childBindings = assistant.makeChildBindings(bindingElm,childBindings); |
| |
| return new ContextJXPathBinding(commonAtts, xpath, factory, childBindings); |
| } catch (BindingException e) { |
| throw e; |
| } catch (Exception e) { |
| throw new BindingException("Error building context binding", |
| DomHelper.getLocationObject(bindingElm)); |
| } |
| } |
| } |